1. WeatherSpark.com
  2. Poland
  3. Łódź Voivodeship

Climate and Average Weather Year Round in Sławno Poland

In Sławno, the summers are comfortable and partly cloudy and the winters are long, freezing, snowy, windy, and mostly cloudy. Over the course of the year, the temperature typically varies from 23°F to 76°F and is rarely below 7°F or above 87°F.

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

Climate in Sławno

very coldcoldcoolcomfortablewarmcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDecNowNow58%58%29%29%overcastclearprecipitation: 2.3 inprecipitation: 2.3 in0.7 in0.7 inmuggy: 4%muggy: 4%0%0%drydrytourism score: 6.8tourism score: 6.80.00.0
Sławno weather by month. Click on each chart for more information.

The warm season lasts for 3.5 months, from May 24 to September 7, with an average daily high temperature above 68°F. The hottest month of the year in Sławno is July, with an average high of 75°F and low of 55°F.

The cold season lasts for 3.7 months, from November 18 to March 10, with an average daily high temperature below 41°F. The coldest month of the year in Sławno is January, with an average low of 24°F and high of 33°F.

Average High and Low Temperature in Sławno

Average High and Low Temperature in SławnowarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 1533°FJan 1533°FAug 576°FAug 576°F23°F23°F56°F56°FMay 2468°FMay 2468°FSep 768°FSep 768°FNov 1841°FNov 1841°FMar 1041°FMar 1041°F48°F48°F49°F49°F32°F32°F28°F28°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 33°F36°F44°F56°F66°F71°F75°F74°F65°F54°F43°F35°F
Temp. 28°F30°F37°F47°F56°F62°F66°F65°F56°F47°F38°F31°F
Low 24°F24°F30°F37°F46°F52°F55°F54°F47°F40°F33°F27°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 Sławno

Average Hourly Temperature in SławnoJanFebMarAprMayJunJulAugSepOctNovDec12 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 coldcoldcoldcoolcomfortablefreezingfreezing
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.

Nakusp, Canada (4,999 miles away) is the far-away foreign place with temperatures most similar to Sławno (view comparison).

Map
Marker
© OpenStreetMap contributors

Compare Sławno to another city:

Map

In Sławno, 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 Sławno begins around April 6 and lasts for 6.4 months, ending around October 17.

The clearest month of the year in Sławno is July, during which on average the sky is clear, mostly clear, or partly cloudy 57% of the time.

The cloudier part of the year begins around October 17 and lasts for 5.6 months, ending around April 6.

The cloudiest month of the year in Sławno is December, during which on average the sky is overcast or mostly cloudy 70% of the time.

Cloud Cover Categories in Sławno

Cloud Cover Categories in SławnoclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 1058%Aug 1058%Nov 2829%Nov 2829%Apr 643%Apr 643%Oct 1744%Oct 1744%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 68%66%59%54%50%46%43%44%49%57%68%70%
Clearer 32%34%41%46%50%54%57%56%51%43%32%30%

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

The wetter season lasts 3.9 months, from May 5 to September 1, with a greater than 23% chance of a given day being a wet day. The month with the most wet days in Sławno is July, with an average of 9.0 days with at least 0.04 inches of precipitation.

The drier season lasts 8.1 months, from September 1 to May 5. The month with the fewest wet days in Sławno is February, with an average of 5.1 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 Sławno is July, with an average of 9.0 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 11.

Daily Chance of Precipitation in Sławno

Daily Chance of Precipitation in SławnowetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jun 1131%Jun 1131%Feb 2716%Feb 2716%May 523%May 523%Sep 123%Sep 123%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 3.4d3.0d4.3d5.5d8.2d8.7d9.0d7.8d6.3d5.4d4.9d4.2d
Mixed 0.8d0.9d0.8d0.3d0.0d0.0d0.0d0.0d0.0d0.1d0.3d0.8d
Snow 1.2d1.2d0.4d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.6d1.0d
Any 5.5d5.1d5.5d5.8d8.2d8.7d9.0d7.8d6.3d5.5d5.8d6.0d

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. Sławno experiences some seasonal variation in monthly rainfall.

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

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

Average Monthly Rainfall in Sławno

Average Monthly Rainfall in SławnoJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 inJul 132.3 inJul 132.3 inFeb 150.5 inFeb 150.5 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 0.5″0.5″0.7″1.1″1.9″2.2″2.3″1.8″1.4″1.1″1.0″0.7″

Snowfall

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

The snowy period of the year lasts for 4.2 months, from November 13 to March 21, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Sławno is February, with an average snowfall of 2.2 inches.

The snowless period of the year lasts for 7.8 months, from March 21 to November 13. The least snow falls around July 23, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Sławno

Average Monthly Snowfall in SławnosnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 inFeb 122.2 inFeb 122.2 inJul 230.0 inJul 230.0 inDec 302.1 inDec 302.1 inMar 211.0 inMar 211.0 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 2.0″2.2″1.1″0.3″0.0″0.0″0.0″0.0″0.0″0.2″1.1″2.0″

The length of the day in Sławno varies extremely over the course of the year. In 2024, the shortest day is December 21, with 7 hours, 51 minutes of daylight; the longest day is June 20, with 16 hours, 37 minutes of daylight.

Hours of Daylight and Twilight in Sławno

Hours of Daylight and Twilight in SławnoJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 8 minMar 2012 hr, 8 minMar 2016 hr, 37 minJun 2016 hr, 37 minJun 2012 hr, 11 minSep 2212 hr, 11 minSep 227 hr, 51 minDec 217 hr, 51 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 8.4h10.0h11.9h13.9h15.6h16.5h16.1h14.5h12.6h10.6h8.9h7.9h

The earliest sunrise is at 4:22 AM on June 17, and the latest sunrise is 3 hours, 22 minutes later at 7:44 AM on December 30. The earliest sunset is at 3:30 PM on December 12, and the latest sunset is 5 hours, 29 minutes later at 9:00 PM on June 24.

Daylight saving time (DST) is observed in Sławno 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 Sławno

Sunrise & Sunset with Twilight and Daylight Saving Time in SławnoJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 174:22 AMJun 174:22 AM9:00 PMJun 249:00 PMJun 24Dec 123:30 PMDec 123:30 PM7:44 AMDec 307:44 AMDec 30Mar 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 Sławno

Solar Elevation and Azimuth in SławnoJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM0000101010202030304040500001010101020203030404050601562NowNow
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 Sławno

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 Sławno, 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 2% of 2% throughout.

Humidity Comfort Levels in Sławno

Humidity Comfort Levels in SławnoJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 280%Feb 280%Jul 264%Jul 264%NowNowcomfortablecomfortabledrydryhumidhumid
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 0.0d0.0d0.0d0.0d0.0d0.4d1.0d0.6d0.1d0.0d0.0d0.0d

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 Sławno experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.6 months, from October 18 to April 5, with average wind speeds of more than 10.2 miles per hour. The windiest month of the year in Sławno is January, with an average hourly wind speed of 11.9 miles per hour.

The calmer time of year lasts for 6.4 months, from April 5 to October 18. The calmest month of the year in Sławno is August, with an average hourly wind speed of 8.5 miles per hour.

Average Wind Speed in Sławno

Average Wind Speed in SławnowindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mph18 mph18 mph20 mph20 mphJan 2412.2 mphJan 2412.2 mphAug 68.2 mphAug 68.2 mphOct 1810.2 mphOct 1810.2 mphApr 510.2 mphApr 510.2 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) 11.911.411.09.68.88.78.58.59.310.110.711.4

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

The wind is most often from the east for 2.3 weeks, from April 23 to May 9, with a peak percentage of 28% on April 25. The wind is most often from the west for 11 months, from May 9 to April 23, with a peak percentage of 50% on January 1.

Wind Direction in Sławno

Wind Direction in SławnoWEWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsoutheastnorth
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 Sławno 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 Sławno for general outdoor tourist activities is from mid June to late August, with a peak score in the second week of August.

Tourism Score in Sławno

Tourism Score in Sławnobest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.86.80.00.0NowNowtemperaturetemperature 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 Sławno for hot-weather activities is from mid July to mid August, with a peak score in the first week of August.

Beach/Pool Score in Sławno

Beach/Pool Score in SławnoJanFebMarAprMayJunJulAugSepOctNovDec002244668810104.24.20.00.0NowNowtemperaturetemperature 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 Sławno typically lasts for 5.7 months (174 days), from around April 23 to around October 14, rarely starting before April 5 or after May 12, and rarely ending before September 27 or after November 3.

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

Time Spent in Various Temperature Bands and the Growing Season in Sławnogrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Apr 2350%Apr 2350%Oct 1450%Oct 1450%May 1290%May 1290%Sep 2790%Sep 2790%Apr 510%Apr 510%Nov 310%Nov 310%0%Feb 90%Feb 9Jul 27100%Jul 27100%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 Sławno should appear around April 27, only rarely appearing before April 19 or after May 10.

Growing Degree Days in Sławno

Growing Degree Days in SławnoJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°FApr 2790°FApr 2790°FJul 13900°FJul 13900°FSep 191,800°FSep 191,800°FDec 311,942°FDec 311,942°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 3.6 months, from April 28 to August 16, with an average daily incident shortwave energy per square meter above 5.2 kWh. The brightest month of the year in Sławno is June, with an average of 6.3 kWh.

The darker period of the year lasts for 3.8 months, from October 25 to February 18, with an average daily incident shortwave energy per square meter below 1.8 kWh. The darkest month of the year in Sławno is December, with an average of 0.7 kWh.

Average Daily Incident Shortwave Solar Energy in Sławno

Average Daily Incident Shortwave Solar Energy in SławnobrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 256.4 kWhJun 256.4 kWhDec 200.7 kWhDec 200.7 kWhApr 285.2 kWhApr 285.2 kWhAug 165.2 kWhAug 165.2 kWhOct 251.8 kWhOct 251.8 kWhFeb 181.8 kWhFeb 181.8 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) 0.91.73.14.65.86.36.15.23.82.31.10.7

For the purposes of this report, the geographical coordinates of Sławno are 51.393 deg latitude, 20.140 deg longitude, and 699 ft elevation.

The topography within 2 miles of Sławno contains only modest variations in elevation, with a maximum elevation change of 282 feet and an average elevation above sea level of 687 feet. Within 10 miles also contains only modest variations in elevation (413 feet). Within 50 miles contains only modest variations in elevation (2,008 feet).

The area within 2 miles of Sławno is covered by cropland (72%) and trees (15%), within 10 miles by cropland (49%) and trees (35%), and within 50 miles by cropland (51%) and trees (32%).

This report illustrates the typical weather in Sławno, 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 Sławno.

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

The stations contributing to this reconstruction are:

  • Lodz Lublinek (EPTM, 82%, 11 mi, northwest, -75 ft elevation change)
  • Radom (EPRP, 11%, 42 mi, east, -98 ft elevation change)
  • Krakow / Balice (EPKF, 3.5%, 92 mi, south, 92 ft elevation change)
  • Katowice-Muchowiec Airport (EPKM, 3.4%, 94 mi, southwest, 233 ft elevation change)

Sources mapEPTM, 82%11 mi, -75 ftEPRP, 11%42 mi, -98 ftEPKF, 3%92 mi, 92 ftEPKM, 3%94 mi, 233 ft© OpenStreetMap contributors

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