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Climate and Average Weather Year Round in Hölö Sweden

In Hölö, the summers are comfortable and partly cloudy and the winters are long, freezing, snowy, and mostly cloudy. Over the course of the year, the temperature typically varies from 21°F to 71°F and is rarely below 4°F or above 80°F.

Based on the tourism score, the best time of year to visit Hölö for warm-weather activities is from late June to mid August.

Climate in Hölö

freezingvery coldcoldcoolcomfortablecoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDecNowNow57%57%26%26%overcastclearprecipitation: 2.3 inprecipitation: 2.3 in0.8 in0.8 inmuggy: 1%muggy: 1%0%0%drydrytourism score: 6.6tourism score: 6.60.00.0
Hölö weather by month. Click on each chart for more information.

The warm season lasts for 3.0 months, from June 2 to September 3, with an average daily high temperature above 63°F. The hottest month of the year in Hölö is July, with an average high of 70°F and low of 53°F.

The cold season lasts for 4.0 months, from November 17 to March 18, with an average daily high temperature below 39°F. The coldest month of the year in Hölö is February, with an average low of 22°F and high of 32°F.

Average High and Low Temperature in Hölö

Average High and Low Temperature in HölöwarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FFeb 1032°FFeb 1032°FJul 2171°FJul 2171°F21°F21°F53°F53°FJun 263°FJun 263°FSep 363°FSep 363°FNov 1739°FNov 1739°FMar 1839°FMar 1839°F44°F44°F47°F47°F31°F31°F26°F26°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 32°F32°F39°F49°F59°F66°F70°F68°F60°F49°F40°F34°F
Temp. 27°F27°F32°F40°F50°F58°F63°F61°F53°F44°F36°F30°F
Low 23°F22°F26°F32°F40°F48°F53°F51°F44°F38°F31°F25°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 Hölö

Average Hourly Temperature in HölöJanFebMarAprMayJunJulAugSepOctNovDec12 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 AMNowNowfreezingvery coldvery coldcoldcoolcoolcomfortablefreezing
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.

Haines, Alaska, United States (4,141 miles away); Terrace, Canada (4,376 miles); and Machiasport, Maine, United States (3,497 miles) are the far-away foreign places with temperatures most similar to Hölö (view comparison).

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In Hölö, 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 Hölö begins around April 16 and lasts for 5.8 months, ending around October 8.

The clearest month of the year in Hölö is July, during which on average the sky is clear, mostly clear, or partly cloudy 56% of the time.

The cloudier part of the year begins around October 8 and lasts for 6.2 months, ending around April 16.

The cloudiest month of the year in Hölö is November, during which on average the sky is overcast or mostly cloudy 73% of the time.

Cloud Cover Categories in Hölö

Cloud Cover Categories in HölöclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 1057%Jul 1057%Nov 2626%Nov 2626%Apr 1641%Apr 1641%Oct 842%Oct 842%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 72%71%65%58%50%46%44%48%51%63%73%73%
Clearer 28%29%35%42%50%54%56%52%49%37%27%27%

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

The wetter season lasts 7.0 months, from June 2 to January 3, with a greater than 24% chance of a given day being a wet day. The month with the most wet days in Hölö is November, with an average of 8.6 days with at least 0.04 inches of precipitation.

The drier season lasts 5.0 months, from January 3 to June 2. The month with the fewest wet days in Hölö is March, with an average of 5.6 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 Hölö is August, with an average of 8.5 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 29% on August 12.

Daily Chance of Precipitation in Hölö

Daily Chance of Precipitation in HölöwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Nov 1230%Nov 1230%Feb 2817%Feb 2817%Jun 224%Jun 224%Jan 324%Jan 324%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 3.7d2.6d3.6d4.9d6.2d7.9d8.2d8.5d7.5d8.0d7.2d5.2d
Mixed 1.5d1.2d1.1d0.8d0.2d0.0d0.0d0.0d0.0d0.2d0.8d1.2d
Snow 1.4d1.7d0.9d0.2d0.0d0.0d0.0d0.0d0.0d0.0d0.5d1.6d
Any 6.6d5.5d5.6d5.9d6.4d7.9d8.2d8.5d7.6d8.3d8.6d8.1d

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. Hölö experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Hölö. The month with the most rain in Hölö is July, with an average rainfall of 2.3 inches.

The month with the least rain in Hölö is February, with an average rainfall of 0.5 inches.

Average Monthly Rainfall in Hölö

Average Monthly Rainfall in HölöJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 inJul 102.3 inJul 102.3 inFeb 200.5 inFeb 200.5 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 0.8″0.5″0.6″1.2″1.4″2.2″2.3″2.1″2.0″1.8″1.6″1.1″

Snowfall

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

The snowy period of the year lasts for 5.4 months, from November 6 to April 19, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Hölö is February, with an average snowfall of 3.8 inches.

The snowless period of the year lasts for 6.6 months, from April 19 to November 6. The least snow falls around July 24, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Hölö

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 3.5″3.8″2.2″1.1″0.2″0.0″0.0″0.0″0.0″0.1″1.7″3.4″

The length of the day in Hölö varies extremely over the course of the year. In 2024, the shortest day is December 21, with 6 hours, 10 minutes of daylight; the longest day is June 20, with 18 hours, 31 minutes of daylight.

Hours of Daylight and Twilight in Hölö

Hours of Daylight and Twilight in HölöJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 9 minMar 2012 hr, 9 minMar 2018 hr, 31 minJun 2018 hr, 31 minJun 2012 hr, 13 minSep 2212 hr, 13 minSep 226 hr, 10 minDec 216 hr, 10 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 7.1h9.3h11.9h14.5h17.0h18.4h17.6h15.4h12.8h10.2h7.7h6.3h

The earliest sunrise is at 3:36 AM on June 18, and the latest sunrise is 5 hours, 8 minutes later at 8:44 AM on December 27. The earliest sunset is at 2:51 PM on December 15, and the latest sunset is 7 hours, 15 minutes later at 10:07 PM on June 23.

Daylight saving time (DST) is observed in Hölö 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 Hölö

Sunrise & Sunset with Twilight and Daylight Saving Time in HölöJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 183:36 AMJun 183:36 AM10:07 PMJun 2310:07 PMJun 23Dec 152:51 PMDec 152:51 PM8:44 AMDec 278:44 AMDec 27Mar 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 Hölö

Solar Elevation and Azimuth in HölöJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM00001010202030304040500001010101020203030404050854NowNow
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 Hölö

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 Hölö, 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, staying within 1% of 1% throughout.

Humidity Comfort Levels in Hölö

Humidity Comfort Levels in HölöJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Mar 210%Mar 210%Jul 311%Jul 311%comfortablecomfortabledrydry
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 0.0d0.0d0.0d0.0d0.0d0.0d0.3d0.2d0.0d0.0d0.0d0.0d

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

The windier part of the year lasts for 6.7 months, from September 1 to March 22, with average wind speeds of more than 6.8 miles per hour. The windiest month of the year in Hölö is January, with an average hourly wind speed of 7.7 miles per hour.

The calmer time of year lasts for 5.3 months, from March 22 to September 1. The calmest month of the year in Hölö is July, with an average hourly wind speed of 5.9 miles per hour.

Average Wind Speed in Hölö

Average Wind Speed in HölöwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mphJan 27.8 mphJan 27.8 mphJul 185.8 mphJul 185.8 mphSep 16.8 mphSep 16.8 mphMar 226.8 mphMar 226.8 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) 7.77.26.96.46.15.95.96.37.07.37.47.6

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

The wind is most often from the south for 2.5 months, from April 5 to June 20, with a peak percentage of 33% on May 9. The wind is most often from the west for 9.5 months, from June 20 to April 5, with a peak percentage of 42% on January 1.

Wind Direction in Hölö

Wind Direction in HölöWSWJanFebMarAprMayJunJulAugSepOctNovDec0%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).

Hölö 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 2.5 months, from June 28 to September 14, with an average temperature above 57°F. The month of the year in Hölö with the warmest water is August, with an average temperature of 62°F.

The time of year with cooler water lasts for 4.5 months, from December 14 to April 30, with an average temperature below 40°F. The month of the year in Hölö with the coolest water is February, with an average temperature of 35°F.

Average Water Temperature in Hölö

Average Water Temperature in HölöwarmcoolJanFebMarAprMayJunJulAugSepOctNovDec30°F30°F35°F35°F40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°F70°F70°FAug 663°FAug 663°F34°FMar 134°FMar 1Jun 2857°FJun 2857°FSep 1457°FSep 1457°FDec 1440°FDec 1440°FApr 3040°FApr 3040°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 37°F35°F35°F38°F44°F54°F61°F62°F57°F50°F44°F40°F

To characterize how pleasant the weather is in Hölö 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 Hölö for general outdoor tourist activities is from late June to mid August, with a peak score in the third week of July.

Tourism Score in Hölö

Tourism Score in Hölöbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.66.60.00.0NowNowtemperaturetemperature 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 Hölö for hot-weather activities is from mid July to early August, with a peak score in the third week of July.

Beach/Pool Score in Hölö

Beach/Pool Score in HölöJanFebMarAprMayJunJulAugSepOctNovDec002244668810102.92.90.00.0NowNowtemperaturetemperature cloudscloudsprecipitationprecipitation
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 Hölö typically lasts for 4.7 months (142 days), from around May 12 to around October 2, rarely starting before April 23 or after May 31, and rarely ending before September 13 or after October 24.

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

Time Spent in Various Temperature Bands and the Growing Season in Hölögrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%May 1250%May 1250%Oct 250%Oct 250%May 3190%May 3190%Sep 1390%Sep 1390%Apr 2310%Apr 2310%Oct 2410%Oct 2410%0%Dec 150%Dec 15Jul 25100%Jul 25100%NowNowfrigidfreezingvery 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 Hölö should appear around May 19, only rarely appearing before May 9 or after May 30.

Growing Degree Days in Hölö

Growing Degree Days in HölöJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F200°F200°F400°F400°F600°F600°F800°F800°F1,000°F1,000°F1,200°F1,200°F1,400°F1,400°FMay 1990°FMay 1990°FAug 8900°FAug 8900°FDec 311,295°FDec 311,295°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 3 to August 9, with an average daily incident shortwave energy per square meter above 5.0 kWh. The brightest month of the year in Hölö is June, with an average of 6.1 kWh.

The darker period of the year lasts for 4.3 months, from October 16 to February 26, with an average daily incident shortwave energy per square meter below 1.4 kWh. The darkest month of the year in Hölö is December, with an average of 0.2 kWh.

Average Daily Incident Shortwave Solar Energy in Hölö

Average Daily Incident Shortwave Solar Energy in HölöbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 206.2 kWhJun 206.2 kWhDec 190.2 kWhDec 190.2 kWhMay 35.0 kWhMay 35.0 kWhAug 95.0 kWhAug 95.0 kWhOct 161.4 kWhOct 161.4 kWhFeb 261.4 kWhFeb 261.4 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) 0.41.02.34.05.66.15.94.63.11.40.50.2

For the purposes of this report, the geographical coordinates of Hölö are 59.017 deg latitude, 17.533 deg longitude, and 157 ft elevation.

The topography within 2 miles of Hölö contains only modest variations in elevation, with a maximum elevation change of 243 feet and an average elevation above sea level of 129 feet. Within 10 miles also contains only modest variations in elevation (315 feet). Within 50 miles contains only modest variations in elevation (564 feet).

The area within 2 miles of Hölö is covered by trees (46%) and cropland (42%), within 10 miles by trees (52%) and cropland (24%), and within 50 miles by water (46%) and trees (33%).

This report illustrates the typical weather in Hölö, 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 Hölö.

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