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Climate and Average Weather Year Round at Dayton-Wright Brothers Airport Ohio, United States

At Dayton-Wright Brothers Airport, the summers are warm and humid, the winters are very cold and windy, and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 22°F to 84°F and is rarely below 5°F or above 92°F.

Based on the tourism score, the best time of year to visit Dayton-Wright Brothers Airport for warm-weather activities is from mid June to mid September.

Climate at Dayton-Wright Brothers Airport

very coldcoldcoolwarmcoolcoldJanFebMarAprMayJunJulAugSepOctNovDecNowNow68%68%39%39%clearovercastprecipitation: 3.9 inprecipitation: 3.9 in2.0 in2.0 inmuggy: 49%muggy: 49%0%0%drydrytourism score: 6.8tourism score: 6.80.10.1
Dayton-Wright Brothers Airport weather by month. Click on each chart for more information.

Average Temperature at Dayton-Wright Brothers Airport

The warm season lasts for 3.9 months, from May 25 to September 20, with an average daily high temperature above 75°F. The hottest day of the year is July 20, with an average high of 84°F and low of 66°F.

The cold season lasts for 3.0 months, from December 1 to March 2, with an average daily high temperature below 46°F. The coldest day of the year is January 29, with an average low of 22°F and high of 37°F.

Average High and Low Temperature at Dayton-Wright Brothers Airport

Average High and Low Temperature at Dayton-Wright Brothers AirportwarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 2937°FJan 2937°FJul 2084°FJul 2084°F22°F22°F66°F66°FMay 2575°FMay 2575°FSep 2075°FSep 2075°FDec 146°FDec 146°FMar 246°FMar 246°F56°F56°F56°F56°F33°F33°F30°F30°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.

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 at Dayton-Wright Brothers Airport

Average Hourly Temperature at Dayton-Wright Brothers AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingfreezingvery coldvery coldcoldcoldcoolcoolcomfortablewarmfreezing
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.

Bucharest, Romania (5,204 miles away); Krasnodar, Russia (5,617 miles); and Urus-Martan, Russia (5,924 miles) are the far-away foreign places with temperatures most similar to Dayton-Wright Brothers Airport (view comparison).

Compare Dayton-Wright Brothers Airport to another city:

Clouds

At Dayton-Wright Brothers Airport, 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 at Dayton-Wright Brothers Airport begins around June 12 and lasts for 4.7 months, ending around November 4. On August 23, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 68% of the time, and overcast or mostly cloudy 32% of the time.

The cloudier part of the year begins around November 4 and lasts for 7.3 months, ending around June 12. On January 2, the cloudiest day of the year, the sky is overcast or mostly cloudy 61% of the time, and clear, mostly clear, or partly cloudy 39% of the time.

Cloud Cover Categories at Dayton-Wright Brothers Airport

Cloud Cover Categories at Dayton-Wright Brothers AirportclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 2368%Aug 2368%Jan 239%Jan 239%Jun 1254%Jun 1254%Nov 454%Nov 454%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.

Precipitation

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

The wetter season lasts 4.7 months, from March 20 to August 10, with a greater than 31% chance of a given day being a wet day. The chance of a wet day peaks at 41% on May 20.

The drier season lasts 7.3 months, from August 10 to March 20. The smallest chance of a wet day is 21% on January 28.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 41% on May 20.

Daily Chance of Precipitation at Dayton-Wright Brothers Airport

Daily Chance of Precipitation at Dayton-Wright Brothers AirportwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%May 2041%May 2041%Jan 2821%Jan 2821%Jan 123%Jan 123%Mar 2031%Mar 2031%Aug 1031%Aug 1031%NowNowrainsnow
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).

Rainfall

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. Dayton-Wright Brothers Airport experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year at Dayton-Wright Brothers Airport. The most rain falls during the 31 days centered around May 14, with an average total accumulation of 3.9 inches.

The least rain falls around February 7, with an average total accumulation of 1.7 inches.

Average Monthly Rainfall at Dayton-Wright Brothers Airport

Average Monthly Rainfall at Dayton-Wright Brothers AirportJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 inMay 143.9 inMay 143.9 inFeb 71.7 inFeb 71.7 inNov 282.7 inNov 282.7 inSep 62.4 inSep 62.4 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 liquid-equivalent snowfall.

Snowfall

We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.

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

The snowy period of the year lasts for 4.0 months, from November 26 to March 28, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around February 12, with an average total liquid-equivalent accumulation of 0.4 inches.

The snowless period of the year lasts for 8.0 months, from March 28 to November 26. The least snow falls around July 23, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall at Dayton-Wright Brothers Airport

Average Liquid-Equivalent Monthly Snowfall at Dayton-Wright Brothers AirportsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 inFeb 120.4 inFeb 120.4 inJul 230.0 inJul 230.0 inNov 260.1 inNov 260.1 inMar 280.1 inMar 280.1 inNowNow
The average liquid-equivalent 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.

Sun

The length of the day at Dayton-Wright Brothers Airport varies significantly over the course of the year. In 2021, the shortest day is December 21, with 9 hours, 22 minutes of daylight; the longest day is June 20, with 14 hours, 58 minutes of daylight.

Hours of Daylight and Twilight at Dayton-Wright Brothers Airport

Hours of Daylight and Twilight at Dayton-Wright Brothers AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2014 hr, 58 minJun 2014 hr, 58 minJun 2012 hr, 9 minSep 2212 hr, 9 minSep 229 hr, 22 minDec 219 hr, 22 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.

The earliest sunrise is at 6:08 AM on June 14, and the latest sunrise is 2 hours, 2 minutes later at 8:11 AM on November 6. The earliest sunset is at 5:12 PM on December 8, and the latest sunset is 3 hours, 56 minutes later at 9:08 PM on June 27.

Daylight saving time (DST) is observed at Dayton-Wright Brothers Airport during 2021, starting in the spring on March 14, lasting 7.8 months, and ending in the fall on November 7.

Sunrise & Sunset with Twilight and Daylight Saving Time at Dayton-Wright Brothers Airport

Sunrise & Sunset with Twilight and Daylight Saving Time at Dayton-Wright Brothers AirportJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 146:08 AMJun 146:08 AM9:08 PMJun 279:08 PMJun 27Dec 85:12 PMDec 85:12 PM8:11 AMNov 68:11 AMNov 6Mar 14DSTMar 14DSTDSTNov 7DSTNov 7daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2021. 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.

Moon

The figure below presents a compact representation of key lunar data for 2021. 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 at Dayton-Wright Brothers Airport

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.

Humidity

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.

Dayton-Wright Brothers Airport experiences significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.9 months, from May 25 to September 21, during which time the comfort level is muggy, oppressive, or miserable at least 12% of the time. The muggiest day of the year is July 23, with muggy conditions 49% of the time.

The least muggy day of the year is January 30, when muggy conditions are essentially unheard of.

Humidity Comfort Levels at Dayton-Wright Brothers Airport

Humidity Comfort Levels at Dayton-Wright Brothers AirportmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 300%Jan 300%Jul 2349%Jul 2349%May 2512%May 2512%Sep 2112%Sep 2112%NowNowoppressiveoppressivemuggymuggydrydryhumidhumidcomfortablecomfortable
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

Wind

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 at Dayton-Wright Brothers Airport experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 7.2 months, from October 13 to May 18, with average wind speeds of more than 8.9 miles per hour. The windiest day of the year is January 15, with an average hourly wind speed of 11.3 miles per hour.

The calmer time of year lasts for 4.8 months, from May 18 to October 13. The calmest day of the year is August 1, with an average hourly wind speed of 6.5 miles per hour.

Average Wind Speed at Dayton-Wright Brothers Airport

Average Wind Speed at Dayton-Wright Brothers AirportwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mph18 mph18 mphJan 1511.3 mphJan 1511.3 mphAug 16.5 mphAug 16.5 mphOct 138.9 mphOct 138.9 mphMay 188.9 mphMay 188.9 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction at Dayton-Wright Brothers Airport varies throughout the year.

The wind is most often from the south for 1.6 months, from April 21 to June 9 and for 3.0 months, from September 1 to November 30, with a peak percentage of 37% on November 14. The wind is most often from the west for 2.4 months, from June 9 to August 20 and for 4.7 months, from November 30 to April 21, with a peak percentage of 38% on July 19. The wind is most often from the east for 1.7 weeks, from August 20 to September 1, with a peak percentage of 26% on August 27.

Wind Direction at Dayton-Wright Brothers Airport

Wind Direction at Dayton-Wright Brothers AirportWSWESWJanFebMarAprMayJunJulAugSepOctNovDec0%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).

Best Time of Year to Visit

To characterize how pleasant the weather is at Dayton-Wright Brothers Airport 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 Dayton-Wright Brothers Airport for general outdoor tourist activities is from mid June to mid September, with a peak score in the last week of August.

Tourism Score at Dayton-Wright Brothers Airport

Tourism Score at Dayton-Wright Brothers Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.86.80.10.1NowNowprecipitationprecipitationcloudscloudstemperaturetemperature tourism 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 Dayton-Wright Brothers Airport for hot-weather activities is from late June to late August, with a peak score in the last week of July.

Beach/Pool Score at Dayton-Wright Brothers Airport

Beach/Pool Score at Dayton-Wright Brothers Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.85.80.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature beach/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.

Growing Season

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 at Dayton-Wright Brothers Airport typically lasts for 6.5 months (197 days), from around April 12 to around October 26, rarely starting before March 27 or after April 28, and rarely ending before October 7 or after November 13.

Time Spent in Various Temperature Bands and the Growing Season at Dayton-Wright Brothers Airport

Time Spent in Various Temperature Bands and the Growing Season at Dayton-Wright Brothers Airportgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 1250%Apr 1250%Oct 2650%Oct 2690%Apr 2890%Apr 2890%Oct 790%Oct 710%Mar 2710%Mar 2710%Nov 1310%Nov 130%Dec 200%Dec 20Jul 17100%Jul 17100%NowNowfrigidfreezingvery coldcoolcomfortablewarmhotcold
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 at Dayton-Wright Brothers Airport should appear around March 28, only rarely appearing before March 12 or after April 13.

Growing Degree Days at Dayton-Wright Brothers Airport

Growing Degree Days at Dayton-Wright Brothers AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°F3,500°F3,500°F4,000°F4,000°FMar 2888°FMar 2888°FJun 10900°FJun 10900°FJul 191,800°FJul 191,800°FDec 313,614°FDec 313,614°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

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 4.0 months, from April 29 to August 30, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest day of the year is July 2, with an average of 6.8 kWh.

The darker period of the year lasts for 3.1 months, from November 6 to February 10, with an average daily incident shortwave energy per square meter below 2.8 kWh. The darkest day of the year is December 21, with an average of 1.8 kWh.

Average Daily Incident Shortwave Solar Energy at Dayton-Wright Brothers Airport

Average Daily Incident Shortwave Solar Energy at Dayton-Wright Brothers AirportbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJul 26.8 kWhJul 26.8 kWhDec 211.8 kWhDec 211.8 kWhApr 295.8 kWhApr 295.8 kWhAug 305.8 kWhAug 305.8 kWhNov 62.8 kWhNov 62.8 kWhFeb 102.8 kWhFeb 102.8 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.

Topography

For the purposes of this report, the geographical coordinates of Dayton-Wright Brothers Airport are 39.591 deg latitude, -84.228 deg longitude, and 942 ft elevation.

The topography within 2 miles of Dayton-Wright Brothers Airport contains only modest variations in elevation, with a maximum elevation change of 223 feet and an average elevation above sea level of 926 feet. Within 10 miles also contains only modest variations in elevation (453 feet). Within 50 miles contains only modest variations in elevation (915 feet).

The area within 2 miles of Dayton-Wright Brothers Airport is covered by artificial surfaces (71%) and cropland (28%), within 10 miles by cropland (47%) and artificial surfaces (41%), and within 50 miles by cropland (71%) and trees (15%).

Data Sources

This report illustrates the typical weather at Dayton-Wright Brothers Airport, 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

Dayton-Wright Brothers Airport has a weather station that reported reliably enough during the analysis period that we have included it in our network. When available, historical temperature and dew point measurements are taken directly from this weather station. These records are obtained from NOAA's Integrated Surface Hourly data set, falling back on ICAO METAR records as required.

In the case of missing or erroneous measurements from this station, we fall back on records from nearby stations, adjusted according to typical seasonal and diurnal intra-station differences. For a given day of the year and hour of the day, the fallback station is selected to minimize the prediction error over the years for which there are measurements for both stations.

The stations on which we may fall back include but are not limited to Middletown Regional Airport/Hook Field, Wright-Patterson Air Force Base, James M Cox Dayton International Airport, Butler County Regional Airport, Springfield-Beckley Municipal Airport, Wilmington Air Park, Cincinnati Municipal Lunken Airport, and Darke County Airport.

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 © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

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.