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Climate and Average Weather Year Round in Payerne Switzerland

In Payerne, the summers are comfortable, the winters are very cold, and it is wet and partly cloudy year round. Over the course of the year, the temperature typically varies from 30°F to 77°F and is rarely below 21°F or above 87°F.

Based on the tourism score, the best time of year to visit Payerne for warm-weather activities is from late June to early September.

Climate in Payerne

very coldcoldcoolcomfortablewarmcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDecNowNow64%64%38%38%overcastclearprecipitation: 3.9 inprecipitation: 3.9 in2.4 in2.4 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 7.0tourism score: 7.00.00.0
Payerne weather by month. Click on each chart for more information.

The warm season lasts for 3.1 months, from June 4 to September 8, with an average daily high temperature above 69°F. The hottest month of the year in Payerne is July, with an average high of 76°F and low of 59°F.

The cold season lasts for 3.6 months, from November 15 to March 3, with an average daily high temperature below 46°F. The coldest month of the year in Payerne is January, with an average low of 31°F and high of 38°F.

Average High and Low Temperature in Payerne

Average High and Low Temperature in PayernewarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 1538°FJan 1538°FAug 377°FAug 377°F30°F30°F60°F60°FJun 469°FJun 469°FSep 869°FSep 869°FNov 1546°FNov 1546°FMar 346°FMar 346°F54°F54°F54°F54°F38°F38°F34°F34°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 38°F41°F50°F57°F65°F71°F76°F75°F67°F57°F46°F40°F
Temp. 34°F36°F43°F50°F57°F64°F68°F67°F60°F51°F42°F36°F
Low 31°F31°F37°F43°F50°F56°F59°F59°F53°F46°F38°F32°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 Payerne

Average Hourly Temperature in PayerneJanFebMarAprMayJunJulAugSepOctNovDec12 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 coldcoldcoldcoolcomfortablewarmcomfortable
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.

Coquitlam, Canada (5,151 miles away) and Boone, North Carolina, United States (4,401 miles) are the far-away foreign places with temperatures most similar to Payerne (view comparison).

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Marker
© OpenStreetMap contributors

Compare Payerne to another city:

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In Payerne, 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 Payerne begins around June 16 and lasts for 3.1 months, ending around September 18.

The clearest month of the year in Payerne is July, during which on average the sky is clear, mostly clear, or partly cloudy 63% of the time.

The cloudier part of the year begins around September 18 and lasts for 8.9 months, ending around June 16.

The cloudiest month of the year in Payerne is November, during which on average the sky is overcast or mostly cloudy 61% of the time.

Cloud Cover Categories in Payerne

Cloud Cover Categories in PayerneclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 2064%Jul 2064%Nov 2338%Nov 2338%Jun 1651%Jun 1651%Sep 1852%Sep 1852%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 58%56%56%57%58%49%37%39%48%58%61%60%
Clearer 42%44%44%43%42%51%63%61%52%42%39%40%

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

The wetter season lasts 2.6 months, from April 29 to July 15, with a greater than 35% chance of a given day being a wet day. The month with the most wet days in Payerne is May, with an average of 12.8 days with at least 0.04 inches of precipitation.

The drier season lasts 9.4 months, from July 15 to April 29. The month with the fewest wet days in Payerne is February, with an average of 8.5 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 Payerne is May, with an average of 12.8 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 44% on May 26.

Daily Chance of Precipitation in Payerne

Daily Chance of Precipitation in PayernewetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%May 2644%May 2644%Mar 226%Mar 226%Jul 1535%Jul 1535%NowNowrainsnowmixed
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 8.2d7.4d8.9d9.8d12.8d12.2d11.0d10.6d9.5d9.7d8.7d9.0d
Mixed 0.7d0.6d0.2d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.3d0.6d
Snow 0.6d0.4d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.1d0.5d
Any 9.4d8.5d9.2d9.8d12.8d12.2d11.0d10.6d9.5d9.7d9.1d10.1d

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. Payerne experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Payerne. The month with the most rain in Payerne is June, with an average rainfall of 3.8 inches.

The month with the least rain in Payerne is February, with an average rainfall of 2.4 inches.

Average Monthly Rainfall in Payerne

Average Monthly Rainfall in PayerneJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 inMay 303.9 inMay 303.9 inMar 62.3 inMar 62.3 inAug 253.4 inAug 253.4 inDec 153.0 inDec 153.0 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 2.6″2.4″2.5″2.8″3.7″3.8″3.5″3.4″3.4″3.2″2.9″2.9″

Snowfall

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

The snowy period of the year lasts for 2.4 months, from December 5 to February 17, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Payerne is January, with an average snowfall of 1.5 inches.

The snowless period of the year lasts for 9.6 months, from February 17 to December 5. The least snow falls around July 19, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Payerne

Average Monthly Snowfall in PayernesnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 inJan 61.7 inJan 61.7 inJul 190.0 inJul 190.0 inDec 51.0 inDec 51.0 inFeb 171.0 inFeb 171.0 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 1.5″1.0″0.3″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.4″1.3″

The length of the day in Payerne varies significantly over the course of the year. In 2024, the shortest day is December 21, with 8 hours, 32 minutes of daylight; the longest day is June 20, with 15 hours, 52 minutes of daylight.

Hours of Daylight and Twilight in Payerne

Hours of Daylight and Twilight in PayerneJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2015 hr, 52 minJun 2015 hr, 52 minJun 2012 hr, 10 minSep 2212 hr, 10 minSep 228 hr, 32 minDec 218 hr, 32 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 9.0h10.3h12.0h13.6h15.1h15.8h15.4h14.1h12.5h10.9h9.4h8.6h

The earliest sunrise is at 5:37 AM on June 15, and the latest sunrise is 2 hours, 40 minutes later at 8:17 AM on January 1. The earliest sunset is at 4:43 PM on December 10, and the latest sunset is 4 hours, 47 minutes later at 9:30 PM on June 25.

Daylight saving time (DST) is observed in Payerne 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 Payerne

Sunrise & Sunset with Twilight and Daylight Saving Time in PayerneJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 155:37 AMJun 155:37 AM9:30 PMJun 259:30 PMJun 25Dec 104:43 PMDec 104:43 PM8:17 AMJan 18:17 AMJan 1Mar 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 Payerne

Solar Elevation and Azimuth in PayerneJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM000010101020203030304040506000010101010202020303040405050602067NowNow
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 Payerne

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.

The perceived humidity level in Payerne, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.

Humidity Comfort Levels in Payerne

Humidity Comfort Levels in PayerneJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 260%Jan 260%Jul 80%Jul 80%NowNowhumidhumidcomfortablecomfortabledrydry
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 0.0d0.0d0.0d0.0d0.0d0.0d0.1d0.1d0.0d0.0d0.0d0.0d

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 Payerne experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 5.2 months, from November 19 to April 27, with average wind speeds of more than 6.7 miles per hour. The windiest month of the year in Payerne is February, with an average hourly wind speed of 7.5 miles per hour.

The calmer time of year lasts for 6.8 months, from April 27 to November 19. The calmest month of the year in Payerne is August, with an average hourly wind speed of 5.9 miles per hour.

Average Wind Speed in Payerne

Average Wind Speed in PayernewindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mphFeb 67.6 mphFeb 67.6 mphAug 95.7 mphAug 95.7 mphNov 196.7 mphNov 196.7 mphApr 276.7 mphApr 276.7 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) 7.37.57.47.06.56.46.15.96.26.46.77.3

The predominant average hourly wind direction in Payerne varies throughout the year.

The wind is most often from the west for 6.6 months, from March 13 to October 1, with a peak percentage of 45% on July 4. The wind is most often from the south for 5.4 months, from October 1 to March 13, with a peak percentage of 46% on January 1.

Wind Direction in Payerne

Wind Direction in PayerneSWSJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsouthnortheast
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).

To characterize how pleasant the weather is in Payerne 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 time of year to visit Payerne for general outdoor tourist activities is from late June to early September, with a peak score in the first week of August.

Tourism Score in Payerne

Tourism Score in Payernebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.07.00.00.0NowNowtemperaturetemperature 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 Payerne for hot-weather activities is from early July to mid August, with a peak score in the last week of July.

Beach/Pool Score in Payerne

Beach/Pool Score in PayerneJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.05.00.00.0NowNowtemperaturetemperature 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 Payerne typically lasts for 7.7 months (235 days), from around March 24 to around November 14, rarely starting before March 1 or after April 14, and rarely ending before October 21 or after December 9.

Time Spent in Various Temperature Bands and the Growing Season in Payerne

Time Spent in Various Temperature Bands and the Growing Season in Payernegrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Mar 2450%Mar 2450%Nov 1450%Nov 1490%Apr 1490%Apr 1490%Oct 2190%Oct 2110%Mar 110%Mar 110%Dec 910%Dec 90%Jan 190%Jan 19Jul 21100%Jul 21100%NowNowfreezingvery coldcoldcoolcomfortablewarm
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 Payerne should appear around April 20, only rarely appearing before April 6 or after May 5.

Growing Degree Days in Payerne

Growing Degree Days in PayerneJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°FApr 2090°FApr 2090°FJul 7900°FJul 7900°FAug 281,800°FAug 281,800°FDec 312,277°FDec 312,277°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 3.2 months, from May 11 to August 17, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest month of the year in Payerne is July, with an average of 6.7 kWh.

The darker period of the year lasts for 3.5 months, from October 27 to February 13, with an average daily incident shortwave energy per square meter below 2.3 kWh. The darkest month of the year in Payerne is December, with an average of 1.3 kWh.

Average Daily Incident Shortwave Solar Energy in Payerne

Average Daily Incident Shortwave Solar Energy in PayernebrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJul 56.9 kWhJul 56.9 kWhDec 231.2 kWhDec 231.2 kWhMay 115.8 kWhMay 115.8 kWhAug 175.8 kWhAug 175.8 kWhOct 272.3 kWhOct 272.3 kWhFeb 132.3 kWhFeb 132.3 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) 1.52.43.75.05.96.76.75.84.42.81.71.3

For the purposes of this report, the geographical coordinates of Payerne are 46.822 deg latitude, 6.936 deg longitude, and 1,473 ft elevation.

The topography within 2 miles of Payerne contains significant variations in elevation, with a maximum elevation change of 774 feet and an average elevation above sea level of 1,534 feet. Within 10 miles contains significant variations in elevation (2,116 feet). Within 50 miles contains large variations in elevation (11,293 feet).

The area within 2 miles of Payerne is covered by cropland (76%) and artificial surfaces (18%), within 10 miles by cropland (57%) and water (19%), and within 50 miles by trees (37%) and cropland (27%).

This report illustrates the typical weather in Payerne, 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 Payerne.

For each station, the records are corrected for the elevation difference between that station and Payerne 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 Payerne is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Payerne and a given station.

The stations contributing to this reconstruction are:

  • Neuchatel (LSGN, 64%, 12 mi, north, 125 ft elevation change)
  • Bern-Belp Airport (LSZB, 20%, 27 mi, east, 200 ft elevation change)
  • Sion (LSMS, 9%, 45 mi, southeast, 108 ft elevation change)
  • Aéroport Genève-Cointrin (LSGG, 7%, 56 mi, southwest, -62 ft elevation change)

Sources mapLSGN, 64%12 mi, 125 ftLSZB, 20%27 mi, 200 ftLSMS, 9%45 mi, 108 ftLSGG, 7%56 mi, -62 ft© OpenStreetMap contributors

To get a sense of how much these sources agree with each other, you can view a comparison of Payerne 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.