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Climate and Average Weather Year Round at Bellefontaine Regional Airport Ohio, United States

At Bellefontaine Regional Airport, the summers are long, warm, and humid; the winters are freezing and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 19°F to 82°F and is rarely below 1°F or above 89°F.

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

Climate at Bellefontaine Regional Airport

very coldcoldcoolwarmcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDecNowNow69%69%37%37%clearovercastprecipitation: 3.6 inprecipitation: 3.6 in1.6 in1.6 inmuggy: 46%muggy: 46%0%0%drydrytourism score: 6.8tourism score: 6.80.10.1
Bellefontaine Regional Airport weather by month. Click on each chart for more information.

Average Temperature at Bellefontaine Regional Airport

The warm season lasts for 4.0 months, from May 23 to September 21, with an average daily high temperature above 72°F. The hottest day of the year is July 6, with an average high of 82°F and low of 62°F.

The cold season lasts for 3.1 months, from December 2 to March 4, with an average daily high temperature below 43°F. The coldest day of the year is January 29, with an average low of 19°F and high of 33°F.

Average High and Low Temperature at Bellefontaine Regional Airport

Average High and Low Temperature at Bellefontaine Regional AirportwarmcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 2933°FJan 2933°FJul 682°FJul 682°F19°F19°F62°F62°FMay 2372°FMay 2372°FSep 2172°FSep 2172°FDec 243°FDec 243°FMar 443°FMar 443°F52°F52°F52°F52°F30°F30°F27°F27°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 Bellefontaine Regional Airport

Average Hourly Temperature at Bellefontaine Regional AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingvery coldvery coldcoldcoldcoolcomfortablecomfortablewarmfreezing
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.

Teplodar, Ukraine (5,202 miles away); Mineralnye Vody, Russia (5,735 miles); and Soleh Bon, Iran (6,499 miles) are the far-away foreign places with temperatures most similar to Bellefontaine Regional Airport (view comparison).

Compare Bellefontaine Regional Airport to another city:

Clouds

At Bellefontaine Regional 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 Bellefontaine Regional Airport begins around June 12 and lasts for 4.7 months, ending around November 1. On August 23, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 69% of the time, and overcast or mostly cloudy 31% of the time.

The cloudier part of the year begins around November 1 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 63% of the time, and clear, mostly clear, or partly cloudy 37% of the time.

Cloud Cover Categories at Bellefontaine Regional Airport

Cloud Cover Categories at Bellefontaine Regional AirportclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Aug 2369%Aug 2369%Jan 237%Jan 237%Jun 1253%Jun 1253%Nov 153%Nov 153%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 Bellefontaine Regional Airport varies throughout the year.

The wetter season lasts 4.7 months, from March 30 to August 20, with a greater than 30% chance of a given day being a wet day. The chance of a wet day peaks at 41% on May 28.

The drier season lasts 7.3 months, from August 20 to March 30. The smallest chance of a wet day is 18% on January 29.

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 28.

Daily Chance of Precipitation at Bellefontaine Regional Airport

Daily Chance of Precipitation at Bellefontaine Regional AirportwetdrydryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%May 2841%May 2841%Jan 2918%Jan 2918%Jan 122%Jan 122%Mar 3030%Mar 3030%Aug 2030%Aug 2030%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. Bellefontaine Regional Airport experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year at Bellefontaine Regional Airport. The most rain falls during the 31 days centered around June 4, with an average total accumulation of 3.6 inches.

The least rain falls around February 5, with an average total accumulation of 1.2 inches.

Average Monthly Rainfall at Bellefontaine Regional Airport

Average Monthly Rainfall at Bellefontaine Regional AirportJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 in7 in7 inJun 43.6 inJun 43.6 inFeb 51.2 inFeb 51.2 inNov 132.3 inNov 132.3 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. Bellefontaine Regional Airport experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 4.7 months, from November 18 to April 8, 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 0.5 inches.

The snowless period of the year lasts for 7.3 months, from April 8 to November 18. The least snow falls around July 22, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall at Bellefontaine Regional Airport

Average Liquid-Equivalent Monthly Snowfall at Bellefontaine Regional AirportsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 inFeb 120.5 inFeb 120.5 inJul 220.0 inJul 220.0 inNov 180.1 inNov 180.1 inApr 80.1 inApr 80.1 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 Bellefontaine Regional Airport varies significantly over the course of the year. In 2021, the shortest day is December 21, with 9 hours, 17 minutes of daylight; the longest day is June 20, with 15 hours, 3 minutes of daylight.

Hours of Daylight and Twilight at Bellefontaine Regional Airport

Hours of Daylight and Twilight at Bellefontaine Regional AirportJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2015 hr, 3 minJun 2015 hr, 3 minJun 2012 hr, 9 minSep 2212 hr, 9 minSep 229 hr, 17 minDec 219 hr, 17 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 6:04 AM on June 14, and the latest sunrise is 2 hours, 7 minutes later at 8:11 AM on November 6. The earliest sunset is at 5:08 PM on December 8, and the latest sunset is 4 hours, 1 minute later at 9:09 PM on June 27.

Daylight saving time (DST) is observed at Bellefontaine Regional 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 Bellefontaine Regional Airport

Sunrise & Sunset with Twilight and Daylight Saving Time at Bellefontaine Regional AirportJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 146:04 AMJun 146:04 AM9:09 PMJun 279:09 PMJun 27Dec 85:08 PMDec 85:08 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 Bellefontaine Regional 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.

Bellefontaine Regional Airport experiences significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.8 months, from May 26 to September 19, 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 28, with muggy conditions 46% of the time.

The least muggy day of the year is January 28, when muggy conditions are essentially unheard of.

Humidity Comfort Levels at Bellefontaine Regional Airport

Humidity Comfort Levels at Bellefontaine Regional AirportmuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 280%Jan 280%Jul 2846%Jul 2846%May 2612%May 2612%Sep 1912%Sep 1912%NowNowoppressiveoppressivemuggymuggydrydrycomfortablecomfortablehumidhumid
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 Bellefontaine Regional Airport experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 7.3 months, from October 11 to May 20, with average wind speeds of more than 9.9 miles per hour. The windiest day of the year is January 15, with an average hourly wind speed of 12.7 miles per hour.

The calmer time of year lasts for 4.7 months, from May 20 to October 11. The calmest day of the year is August 4, with an average hourly wind speed of 7.1 miles per hour.

Average Wind Speed at Bellefontaine Regional Airport

Average Wind Speed at Bellefontaine Regional AirportwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mph18 mph18 mph20 mph20 mphJan 1512.7 mphJan 1512.7 mphAug 47.1 mphAug 47.1 mphOct 119.9 mphOct 119.9 mphMay 209.9 mphMay 209.9 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 Bellefontaine Regional Airport varies throughout the year.

The wind is most often from the south for 2.3 weeks, from May 11 to May 27 and for 2.6 months, from September 1 to November 18, with a peak percentage of 37% on November 14. The wind is most often from the west for 3.1 months, from May 27 to September 1 and for 5.8 months, from November 18 to May 11, with a peak percentage of 40% on July 20.

Wind Direction at Bellefontaine Regional Airport

Wind Direction at Bellefontaine Regional AirportWSWSWJanFebMarAprMayJunJulAugSepOctNovDec0%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).

Best Time of Year to Visit

To characterize how pleasant the weather is at Bellefontaine Regional 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 Bellefontaine Regional Airport for general outdoor tourist activities is from mid June to mid September, with a peak score in the second week of August.

Tourism Score at Bellefontaine Regional Airport

Tourism Score at Bellefontaine Regional 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 Bellefontaine Regional Airport for hot-weather activities is from late June to late August, with a peak score in the third week of July.

Beach/Pool Score at Bellefontaine Regional Airport

Beach/Pool Score at Bellefontaine Regional Airportbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.25.20.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature 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 Bellefontaine Regional Airport typically lasts for 5.7 months (175 days), from around April 23 to around October 15, rarely starting before April 6 or after May 12, and rarely ending before September 26 or after November 4.

Time Spent in Various Temperature Bands and the Growing Season at Bellefontaine Regional Airport

Time Spent in Various Temperature Bands and the Growing Season at Bellefontaine Regional Airportgrowing 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 1550%Oct 1550%May 1290%May 1290%Sep 2690%Sep 2690%Apr 610%Apr 610%Nov 410%Nov 410%0%Feb 110%Feb 11Jul 22100%Jul 22100%NowNowfreezingvery coldcoolcomfortablewarmcoldhot
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 Bellefontaine Regional Airport should appear around April 9, only rarely appearing before March 25 or after April 23.

Growing Degree Days at Bellefontaine Regional Airport

Growing Degree Days at Bellefontaine Regional AirportJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°FApr 989°FApr 989°FJun 20900°FJun 20900°FAug 21,800°FAug 21,800°FDec 312,999°FDec 312,999°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 30 to August 29, 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 6.9 kWh.

The darker period of the year lasts for 3.2 months, from November 5 to February 12, with an average daily incident shortwave energy per square meter below 2.7 kWh. The darkest day of the year is December 21, with an average of 1.7 kWh.

Average Daily Incident Shortwave Solar Energy at Bellefontaine Regional Airport

Average Daily Incident Shortwave Solar Energy at Bellefontaine Regional AirportbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJul 26.9 kWhJul 26.9 kWhDec 211.7 kWhDec 211.7 kWhApr 305.8 kWhApr 305.8 kWhAug 295.8 kWhAug 295.8 kWhNov 52.7 kWhNov 52.7 kWhFeb 122.7 kWhFeb 122.7 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 Bellefontaine Regional Airport are 40.370 deg latitude, -83.818 deg longitude, and 1,109 ft elevation.

The topography within 2 miles of Bellefontaine Regional Airport contains only modest variations in elevation, with a maximum elevation change of 151 feet and an average elevation above sea level of 1,101 feet. Within 10 miles contains only modest variations in elevation (574 feet). Within 50 miles contains significant variations in elevation (850 feet).

The area within 2 miles of Bellefontaine Regional Airport is covered by cropland (99%), within 10 miles by cropland (87%), and within 50 miles by cropland (88%).

Data Sources

This report illustrates the typical weather at Bellefontaine Regional 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

Bellefontaine Regional 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 Lima Allen County Airport, Union County Airport, Springfield-Beckley Municipal Airport, Wright-Patterson Air Force Base, James M Cox Dayton International Airport, Findlay Airport, Putnam County Airport, and Delaware Municipal Airport - Jim Moore Field.

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.