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Climate and Average Weather Year Round in San Pietro Italy

In San Pietro, the summers are warm and humid, the winters are very cold, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 30°F to 86°F and is rarely below 23°F or above 93°F.

Based on the beach/pool score, the best time of year to visit San Pietro for hot-weather activities is from late June to late August.

Climate in San Pietro

coldcoolwarmhotwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow75%75%46%46%clearovercastprecipitation: 2.9 inprecipitation: 2.9 in1.3 in1.3 inmuggy: 58%muggy: 58%0%0%drydrybeach/pool score: 7.5beach/pool score: 7.50.00.0
San Pietro weather by month. Click on each chart for more information.

The hot season lasts for 3.3 months, from June 1 to September 12, with an average daily high temperature above 77°F. The hottest month of the year in San Pietro is July, with an average high of 85°F and low of 66°F.

The cold season lasts for 3.3 months, from November 19 to February 28, with an average daily high temperature below 51°F. The coldest month of the year in San Pietro is January, with an average low of 31°F and high of 43°F.

Average High and Low Temperature in San Pietro

Average High and Low Temperature in San PietrohotcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 1242°FJan 1242°FAug 286°FAug 286°F30°F30°F67°F67°FJun 177°FJun 177°FSep 1277°FSep 1277°FNov 1951°FNov 1951°FFeb 2851°FFeb 2851°F59°F59°F59°F59°F39°F39°F35°F35°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.
AverageJanFebMarAprMayJunJulAugSepOctNovDec
High 43°F48°F56°F64°F73°F80°F85°F84°F76°F64°F52°F44°F
Temp. 36°F40°F48°F55°F64°F71°F76°F75°F67°F57°F46°F38°F
Low 31°F33°F40°F47°F55°F62°F66°F65°F58°F50°F40°F33°F

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in San Pietro

Average Hourly Temperature in San PietroJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMNowNowvery coldvery coldcoldcoldcoolcoolcomfortablewarmhot
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Jeffersonville, Kentucky, United States (4,635 miles away) is the far-away foreign place with temperatures most similar to San Pietro (view comparison).

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Compare San Pietro to another city:

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In San Pietro, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in San Pietro begins around June 16 and lasts for 3.1 months, ending around September 20.

The clearest month of the year in San Pietro is July, during which on average the sky is clear, mostly clear, or partly cloudy 73% of the time.

The cloudier part of the year begins around September 20 and lasts for 8.9 months, ending around June 16.

The cloudiest month of the year in San Pietro is November, during which on average the sky is overcast or mostly cloudy 52% of the time.

Cloud Cover Categories in San Pietro

Cloud Cover Categories in San PietroclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2075%Jul 2075%Nov 1846%Nov 1846%Jun 1661%Jun 1661%Sep 2061%Sep 2061%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.
FractionJanFebMarAprMayJunJulAugSepOctNovDec
Cloudier 49%48%49%51%49%39%27%29%39%48%52%50%
Clearer 51%52%51%49%51%61%73%71%61%52%48%50%

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in San Pietro varies throughout the year.

The wetter season lasts 7.8 months, from March 27 to November 21, with a greater than 23% chance of a given day being a wet day. The month with the most wet days in San Pietro is May, with an average of 9.2 days with at least 0.04 inches of precipitation.

The drier season lasts 4.2 months, from November 21 to March 27. The month with the fewest wet days in San Pietro is January, with an average of 4.9 days with at least 0.04 inches of precipitation.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. The month with the most days of rain alone in San Pietro is May, with an average of 9.2 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 31% on June 3.

Daily Chance of Precipitation in San Pietro

Daily Chance of Precipitation in San PietrowetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jun 331%Jun 331%Jan 2214%Jan 2214%Mar 2723%Mar 2723%Nov 2123%Nov 2123%NowNowrain
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).
Days ofJanFebMarAprMayJunJulAugSepOctNovDec
Rain 4.2d4.7d5.8d8.3d9.2d8.7d7.6d7.1d7.1d7.7d6.9d5.3d
Mixed 0.4d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.4d
Snow 0.2d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.2d
Any 4.9d4.9d5.9d8.3d9.2d8.7d7.6d7.1d7.1d7.7d7.0d5.9d

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. San Pietro experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in San Pietro. The month with the most rain in San Pietro is October, with an average rainfall of 2.9 inches.

The month with the least rain in San Pietro is January, with an average rainfall of 1.3 inches.

Average Monthly Rainfall in San Pietro

Average Monthly Rainfall in San PietroJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 inOct 242.9 inOct 242.9 inJan 191.3 inJan 191.3 inMay 212.6 inMay 212.6 inJul 231.9 inJul 231.9 inNowNow
The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average snowfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Rainfall 1.3″1.5″1.8″2.3″2.6″2.5″2.0″2.1″2.6″2.9″2.7″1.7″

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day of the year. San Pietro experiences some seasonal variation in monthly snowfall.

The snowy period of the year lasts for 3.0 weeks, from December 24 to January 14, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in San Pietro is January, with an average snowfall of 0.9 inches.

The snowless period of the year lasts for 11 months, from January 14 to December 24. The least snow falls around July 17, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in San Pietro

Average Monthly Snowfall in San PietroJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 inJan 11.1 inJan 11.1 inJul 170.0 inJul 170.0 inDec 241.0 inDec 241.0 inNowNow
The average snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.
JanFebMarAprMayJunJulAugSepOctNovDec
Snowfall 0.9″0.3″0.1″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.7″

The length of the day in San Pietro varies significantly over the course of the year. In 2024, the shortest day is December 21, with 8 hours, 43 minutes of daylight; the longest day is June 20, with 15 hours, 41 minutes of daylight.

Hours of Daylight and Twilight in San Pietro

Hours of Daylight and Twilight in San PietroJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2015 hr, 41 minJun 2015 hr, 41 minJun 2012 hr, 10 minSep 2212 hr, 10 minSep 228 hr, 43 minDec 218 hr, 43 minDec 21nightnightdayNowNow
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.
Hours ofJanFebMarAprMayJunJulAugSepOctNovDec
Daylight 9.2h10.4h12.0h13.6h14.9h15.6h15.2h14.0h12.5h10.9h9.5h8.8h

The earliest sunrise is at 5:26 AM on June 15, and the latest sunrise is 2 hours, 29 minutes later at 7:55 AM on January 2. The earliest sunset is at 4:32 PM on December 9, and the latest sunset is 4 hours, 36 minutes later at 9:08 PM on June 25.

Daylight saving time (DST) is observed in San Pietro during 2024, starting in the spring on March 31, lasting 6.9 months, and ending in the fall on October 27.

Sunrise & Sunset with Twilight and Daylight Saving Time in San Pietro

Sunrise & Sunset with Twilight and Daylight Saving Time in San PietroJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 155:26 AMJun 155:26 AM9:08 PMJun 259:08 PMJun 25Dec 94:32 PMDec 94:32 PM7:55 AMJan 27:55 AMJan 2Mar 31DSTMar 31DSTDSTOct 27DSTOct 27daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2024. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in San Pietro

Solar Elevation and Azimuth in San PietroJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AM00001010102020203030304040506000010101010202020303040405050602168NowNow
northeastsouthwest
Solar elevation and azimuth over the course of the year 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for 2024. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

Moon Rise, Set & Phases in San Pietro

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

San Pietro experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.4 months, from June 3 to September 16, during which time the comfort level is muggy, oppressive, or miserable at least 14% of the time. The month with the most muggy days in San Pietro is July, with 15.8 days that are muggy or worse.

The least muggy day of the year is February 19, when muggy conditions are essentially unheard of.

Humidity Comfort Levels in San Pietro

Humidity Comfort Levels in San PietromuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 190%Feb 190%Aug 458%Aug 458%Jun 314%Jun 314%Sep 1614%Sep 1614%NowNowoppressiveoppressivemuggymuggydrydryhumidhumidcomfortablecomfortable
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.
JanFebMarAprMayJunJulAugSepOctNovDec
Muggy days 0.0d0.0d0.0d0.0d1.3d7.9d15.8d15.0d4.9d0.5d0.0d0.0d

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in San Pietro experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 3.7 months, from February 2 to May 23, with average wind speeds of more than 5.2 miles per hour. The windiest month of the year in San Pietro is April, with an average hourly wind speed of 5.8 miles per hour.

The calmer time of year lasts for 8.2 months, from May 23 to February 2. The calmest month of the year in San Pietro is August, with an average hourly wind speed of 4.6 miles per hour.

Average Wind Speed in San Pietro

Average Wind Speed in San PietrowindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mph9 mph9 mph10 mph10 mphApr 55.9 mphApr 55.9 mphAug 64.5 mphAug 64.5 mphFeb 25.2 mphFeb 25.2 mphMay 235.2 mphMay 235.2 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Wind Speed (mph) 4.95.45.75.85.45.04.74.64.95.15.04.8

The predominant average hourly wind direction in San Pietro is from the east throughout the year.

Wind Direction in San Pietro

Wind Direction in San PietroJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwesteastnorthsouth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

San Pietro is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average water temperature experiences significant seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.0 months, from June 16 to September 16, with an average temperature above 72°F. The month of the year in San Pietro with the warmest water is August, with an average temperature of 78°F.

The time of year with cooler water lasts for 3.7 months, from December 18 to April 7, with an average temperature below 54°F. The month of the year in San Pietro with the coolest water is February, with an average temperature of 48°F.

Average Water Temperature in San Pietro

Average Water Temperature in San PietrowarmcoolJanFebMarAprMayJunJulAugSepOctNovDec40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°F75°F75°F80°F80°F85°F85°FAug 478°FAug 478°F48°FFeb 1648°FFeb 16Jun 1672°FJun 1672°FSep 1672°FSep 1672°FDec 1854°FDec 1854°FApr 754°FApr 754°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 50°F48°F50°F56°F65°F72°F77°F78°F72°F66°F59°F54°F

To characterize how pleasant the weather is in San Pietro throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit San Pietro for general outdoor tourist activities are from mid May to late June and from mid August to late September, with a peak score in the second week of September.

Tourism Score in San Pietro

Tourism Score in San Pietrobest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.27.20.00.06.76.76.06.0NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationtourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit San Pietro for hot-weather activities is from late June to late August, with a peak score in the third week of July.

Beach/Pool Score in San Pietro

Beach/Pool Score in San Pietrobest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.57.50.00.0NowNowtemperaturetemperature cloudscloudsprecipitationprecipitationbeach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in San Pietro typically lasts for 8.4 months (258 days), from around March 6 to around November 19, rarely starting before February 11 or after March 27, and rarely ending before October 30 or after December 10.

Time Spent in Various Temperature Bands and the Growing Season in San Pietro

Time Spent in Various Temperature Bands and the Growing Season in San Pietrogrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Mar 650%Mar 650%Nov 1950%Nov 1990%Mar 2790%Mar 2790%Oct 3090%Oct 3010%Feb 1110%Feb 1110%Dec 1010%Dec 100%Jan 40%Jan 4Jul 17100%Jul 17100%NowNowvery coldcoldcoolcomfortablewarmhot
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms in San Pietro should appear around March 31, only rarely appearing before March 17 or after April 16.

Growing Degree Days in San Pietro

Growing Degree Days in San PietroJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°F3,500°F3,500°F4,000°F4,000°FMar 3189°FMar 3189°FJun 9900°FJun 9900°FJul 171,800°FJul 171,800°FDec 313,712°FDec 313,712°F
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.3 months, from May 8 to August 17, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest month of the year in San Pietro is July, with an average of 6.8 kWh.

The darker period of the year lasts for 3.5 months, from October 28 to February 12, with an average daily incident shortwave energy per square meter below 2.5 kWh. The darkest month of the year in San Pietro is December, with an average of 1.4 kWh.

Average Daily Incident Shortwave Solar Energy in San Pietro

Average Daily Incident Shortwave Solar Energy in San PietrobrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJul 76.9 kWhJul 76.9 kWhDec 151.4 kWhDec 151.4 kWhMay 85.8 kWhMay 85.8 kWhAug 175.8 kWhAug 175.8 kWhOct 282.5 kWhOct 282.5 kWhFeb 122.5 kWhFeb 122.5 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.
JanFebMarAprMayJunJulAugSepOctNovDec
Solar Energy (kWh) 1.72.63.95.06.16.76.85.84.43.01.81.4

For the purposes of this report, the geographical coordinates of San Pietro are 45.442 deg latitude, 11.130 deg longitude, and 230 ft elevation.

The topography within 2 miles of San Pietro contains significant variations in elevation, with a maximum elevation change of 755 feet and an average elevation above sea level of 301 feet. Within 10 miles contains significant variations in elevation (3,061 feet). Within 50 miles contains large variations in elevation (9,413 feet).

The area within 2 miles of San Pietro is covered by cropland (77%) and artificial surfaces (16%), within 10 miles by cropland (61%) and trees (22%), and within 50 miles by cropland (59%) and trees (25%).

This report illustrates the typical weather in San Pietro, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 4 weather stations near enough to contribute to our estimation of the temperature and dew point in San Pietro.

For each station, the records are corrected for the elevation difference between that station and San Pietro according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at San Pietro is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between San Pietro and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of San Pietro and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © OpenStreetMap contributors.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.

Please review our full terms contained on our Terms of Service page.