1. WeatherSpark.com
  2. United States
  3. California

Climate and Average Weather Year Round in Shasta California, United States

In Shasta, the summers are hot, dry, and mostly clear and the winters are cold, wet, and partly cloudy. Over the course of the year, the temperature typically varies from 34°F to 97°F and is rarely below 26°F or above 106°F.

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

Climate in Shasta

coldcoolwarmhotswelteringhotwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow90%90%40%40%clearovercastprecipitation: 7.0 inprecipitation: 7.0 in0.1 in0.1 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 7.9tourism score: 7.90.20.2
Shasta weather by month. Click on each chart for more information.

The hot season lasts for 3.2 months, from June 12 to September 19, with an average daily high temperature above 88°F. The hottest month of the year in Shasta is July, with an average high of 96°F and low of 63°F.

The cool season lasts for 3.5 months, from November 14 to February 27, with an average daily high temperature below 61°F. The coldest month of the year in Shasta is December, with an average low of 35°F and high of 53°F.

Average High and Low Temperature in Shasta

Average High and Low Temperature in ShastahotcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°F110°F110°FDec 3052°FDec 3052°FJul 2497°FJul 2497°F34°F34°F64°F64°FJun 1288°FJun 1288°FSep 1988°FSep 1988°FFeb 2761°FFeb 2761°F58°F58°F55°F55°F40°F40°F40°F40°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 54°F59°F64°F71°F80°F89°F96°F96°F89°F76°F61°F53°F
Temp. 43°F47°F51°F56°F65°F73°F80°F78°F71°F60°F48°F42°F
Low 36°F39°F42°F45°F52°F59°F63°F61°F56°F48°F40°F35°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 Shasta

Average Hourly Temperature in ShastaJanFebMarAprMayJunJulAugSepOctNovDec12 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 coldvery coldvery coldcoldcoldcoolcomfortablewarmhotcomfortablewarmsweltering
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.

Jaén, Spain (5,787 miles away) is the far-away foreign place with temperatures most similar to Shasta (view comparison).

Map
Marker
© OpenStreetMap contributors

Compare Shasta to another city:

Map

In Shasta, the average percentage of the sky covered by clouds experiences extreme seasonal variation over the course of the year.

The clearer part of the year in Shasta begins around May 28 and lasts for 4.7 months, ending around October 19.

The clearest month of the year in Shasta is August, during which on average the sky is clear, mostly clear, or partly cloudy 88% of the time.

The cloudier part of the year begins around October 19 and lasts for 7.3 months, ending around May 28.

The cloudiest month of the year in Shasta is January, during which on average the sky is overcast or mostly cloudy 59% of the time.

Cloud Cover Categories in Shasta

Cloud Cover Categories in ShastaclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 390%Aug 390%Jan 1040%Jan 1040%May 2865%May 2865%Oct 1966%Oct 1966%NowNowclearovercastmostly clearmostly cloudy
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 59%58%54%46%38%24%12%12%18%33%52%57%
Clearer 41%42%46%54%62%76%88%88%82%67%48%43%

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

The wetter season lasts 6.0 months, from October 27 to April 29, with a greater than 21% chance of a given day being a wet day. The month with the most wet days in Shasta is February, with an average of 10.8 days with at least 0.04 inches of precipitation.

The drier season lasts 6.0 months, from April 29 to October 27. The month with the fewest wet days in Shasta is August, with an average of 0.8 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 Shasta is February, with an average of 10.5 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 39% on February 28.

Daily Chance of Precipitation in Shasta

Daily Chance of Precipitation in ShastawetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 2840%Feb 2840%Aug 22%Aug 22%Oct 2721%Oct 2721%Apr 2921%Apr 2921%NowNowrainmixed
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 10.1d10.5d10.5d7.3d5.3d2.7d0.9d0.8d2.1d4.7d9.0d10.3d
Mixed 0.6d0.2d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.2d0.6d
Snow 0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.1d
Any 10.9d10.8d10.6d7.3d5.3d2.7d0.9d0.8d2.1d4.7d9.2d11.0d

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. Shasta experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.6 months, from September 7 to June 25, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in Shasta is December, with an average rainfall of 6.8 inches.

The rainless period of the year lasts for 2.4 months, from June 25 to September 7. The month with the least rain in Shasta is August, with an average rainfall of 0.2 inches.

Average Monthly Rainfall in Shasta

Average Monthly Rainfall in ShastarainrainJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 in14 in14 inDec 116.9 inDec 116.9 inJul 300.1 inJul 300.1 inFeb 166.8 inFeb 166.8 inSep 70.5 inSep 70.5 inJun 250.5 inJun 250.5 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 6.2″6.8″5.2″2.7″1.7″0.8″0.2″0.2″0.7″2.2″5.1″6.8″

Snowfall

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

The snowy period of the year lasts for 1.0 months, from December 15 to January 15, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Shasta is December, with an average snowfall of 1.1 inches.

The snowless period of the year lasts for 11 months, from January 15 to December 15. The least snow falls around July 26, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Shasta

Average Monthly Snowfall in ShastaJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 inDec 281.4 inDec 281.4 inJul 260.0 inJul 260.0 inJan 151.0 inJan 151.0 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″0.2″0.1″0.0″0.0″0.0″0.0″0.0″0.0″0.0″0.1″1.1″

The length of the day in Shasta varies significantly over the course of the year. In 2024, the shortest day is December 21, with 9 hours, 16 minutes of daylight; the longest day is June 20, with 15 hours, 5 minutes of daylight.

Hours of Daylight and Twilight in Shasta

Hours of Daylight and Twilight in ShastaJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 8 minMar 1912 hr, 8 minMar 1915 hr, 5 minJun 2015 hr, 5 minJun 2012 hr, 10 minSep 2212 hr, 10 minSep 229 hr, 16 minDec 219 hr, 16 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 9.7h10.7h12.0h13.3h14.5h15.0h14.7h13.7h12.4h11.1h9.9h9.3h

The earliest sunrise is at 5:38 AM on June 13, and the latest sunrise is 2 hours, 4 minutes later at 7:42 AM on November 2. The earliest sunset is at 4:42 PM on December 7, and the latest sunset is 4 hours, 2 minutes later at 8:44 PM on June 26.

Daylight saving time (DST) is observed in Shasta during 2024, starting in the spring on March 10, lasting 7.8 months, and ending in the fall on November 3.

Sunrise & Sunset with Twilight and Daylight Saving Time in Shasta

Sunrise & Sunset with Twilight and Daylight Saving Time in ShastaJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 135:38 AMJun 135:38 AM8:44 PMJun 268:44 PMJun 26Dec 74:42 PMDec 74:42 PM7:42 AMNov 27:42 AMNov 2Mar 10DSTMar 10DSTDSTNov 3DSTNov 3daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
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 Shasta

Solar Elevation and Azimuth in ShastaJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM00010101010202020303030404040505060607000010101020202020303040405050602673NowNow
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 Shasta

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 Shasta, 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 Shasta

Humidity Comfort Levels in ShastaJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 230%Jan 230%Jul 190%Jul 190%NowNowdrydrycomfortablecomfortable
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 0.0d0.0d0.0d0.0d0.0d0.0d0.1d0.0d0.0d0.0d0.0d0.0d

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 Shasta does not vary significantly over the course of the year, remaining within 0.3 miles per hour of 4.4 miles per hour throughout.

Average Wind Speed in Shasta

Average Wind Speed in ShastaJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mphMar 274.6 mphMar 274.6 mphAug 84.1 mphAug 84.1 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) 4.44.54.64.54.54.54.24.14.24.34.34.5

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

The wind is most often from the south for 2.2 months, from June 28 to September 5, with a peak percentage of 50% on August 5. The wind is most often from the north for 9.8 months, from September 5 to June 28, with a peak percentage of 48% on January 1.

Wind Direction in Shasta

Wind Direction in ShastaNSNJanFebMarAprMayJunJulAugSepOctNovDec0%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 Shasta 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 Shasta for general outdoor tourist activities is from mid June to early September, with a peak score in the first week of August.

Tourism Score in Shasta

Tourism Score in Shastabest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810107.97.90.20.2temperaturetemperature 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 Shasta for hot-weather activities is from early July to early August, with a peak score in the third week of July.

Beach/Pool Score in Shasta

Beach/Pool Score in ShastaJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.75.70.00.0temperaturetemperature 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 Shasta typically lasts for 8.1 months (249 days), from around March 12 to around November 16, rarely starting before February 13 or after April 9, and rarely ending before October 29 or after December 3.

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

Time Spent in Various Temperature Bands and the Growing Season in Shastagrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Mar 1250%Mar 1250%Nov 1650%Nov 1690%Apr 990%Apr 990%Oct 2990%Oct 2910%Feb 1310%Feb 1310%Dec 310%Dec 3Jul 25100%Jul 25100%very coldcoldcoolcomfortablewarmhotfreezingsweltering
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 Shasta should appear around February 27, only rarely appearing before February 10 or after March 19.

Growing Degree Days in Shasta

Growing Degree Days in ShastaJanFebMarAprMayJunJulAugSepOctNovDec0°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°F4,500°F4,500°FFeb 2788°FFeb 2788°FMay 29900°FMay 29900°FJul 81,800°FJul 81,800°FDec 314,262°FDec 314,262°FNowNow
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 3.4 months, from May 11 to August 23, with an average daily incident shortwave energy per square meter above 7.1 kWh. The brightest month of the year in Shasta is July, with an average of 8.2 kWh.

The darker period of the year lasts for 3.8 months, from October 31 to February 20, with an average daily incident shortwave energy per square meter below 3.1 kWh. The darkest month of the year in Shasta is December, with an average of 1.9 kWh.

Average Daily Incident Shortwave Solar Energy in Shasta

Average Daily Incident Shortwave Solar Energy in ShastabrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWh10 kWh10 kWhJun 308.4 kWhJun 308.4 kWhDec 191.8 kWhDec 191.8 kWhMay 117.1 kWhMay 117.1 kWhAug 237.1 kWhAug 237.1 kWhOct 313.1 kWhOct 313.1 kWhFeb 203.1 kWhFeb 203.1 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) 2.12.94.45.97.28.18.27.35.84.02.51.9

For the purposes of this report, the geographical coordinates of Shasta are 40.599 deg latitude, -122.492 deg longitude, and 1,033 ft elevation.

The topography within 2 miles of Shasta contains very significant variations in elevation, with a maximum elevation change of 1,535 feet and an average elevation above sea level of 1,152 feet. Within 10 miles contains very significant variations in elevation (5,745 feet). Within 50 miles also contains extreme variations in elevation (8,806 feet).

The area within 2 miles of Shasta is covered by shrubs (93%), within 10 miles by shrubs (54%) and trees (18%), and within 50 miles by trees (44%) and shrubs (33%).

This report illustrates the typical weather in Shasta, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Shasta.

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

The stations contributing to this reconstruction are:

  • Redding Municipal Airport (KRDD, 72%, 12 mi, southeast, -531 ft elevation change)
  • Lonnie Pool Field Weaverville Airport (KO54, 21%, 25 mi, northwest, 1,316 ft elevation change)
  • Mount Shasta (KMHS, 7%, 51 mi, north, 2,500 ft elevation change)

Sources mapKRDD, 72%12 mi, -531 ftKO54, 21%25 mi, 1,316 ftKMHS, 7%51 mi, 2,500 ft© OpenStreetMap contributors

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