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Climate and Average Weather Year Round in Snowdonia United Kingdom

In Snowdonia, the summers are cool and partly cloudy and the winters are long, very cold, wet, windy, and mostly cloudy. Over the course of the year, the temperature typically varies from 33°F to 63°F and is rarely below 23°F or above 71°F.

Based on the tourism score, the best time of year to visit Snowdonia for warm-weather activities is from early July to late August.

Climate in Snowdonia

very coldcoldcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDecNowNow51%51%27%27%overcastclearprecipitation: 4.2 inprecipitation: 4.2 in2.0 in2.0 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 5.0tourism score: 5.00.00.0
Snowdonia weather by month. Click on each chart for more information.

The warm season lasts for 3.2 months, from June 9 to September 15, with an average daily high temperature above 59°F. The hottest month of the year in Snowdonia is July, with an average high of 62°F and low of 50°F.

The cool season lasts for 4.0 months, from November 19 to March 19, with an average daily high temperature below 45°F. The coldest month of the year in Snowdonia is February, with an average low of 33°F and high of 41°F.

Average High and Low Temperature in Snowdonia

Average High and Low Temperature in SnowdoniawarmcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FFeb 1741°FFeb 1741°FJul 2663°FJul 2663°F33°F33°F51°F51°FJun 959°FJun 959°FSep 1559°FSep 1559°FNov 1945°FNov 1945°F46°F46°F47°F47°F38°F38°F35°F35°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 41°F41°F45°F50°F55°F59°F62°F62°F58°F52°F46°F42°F
Temp. 37°F37°F40°F43°F49°F53°F57°F56°F53°F47°F42°F38°F
Low 34°F33°F35°F37°F42°F47°F50°F50°F47°F43°F38°F35°F

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in Snowdonia

Average Hourly Temperature in SnowdoniaJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMNowNowvery coldvery coldcoldcool
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.
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© OpenStreetMap contributors

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In Snowdonia, 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 Snowdonia begins around April 17 and lasts for 5.7 months, ending around October 6.

The clearest month of the year in Snowdonia is July, during which on average the sky is clear, mostly clear, or partly cloudy 51% of the time.

The cloudier part of the year begins around October 6 and lasts for 6.3 months, ending around April 17.

The cloudiest month of the year in Snowdonia is December, during which on average the sky is overcast or mostly cloudy 72% of the time.

Cloud Cover Categories in Snowdonia

Cloud Cover Categories in SnowdoniaclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 1451%Jul 1451%Dec 2127%Dec 2127%Apr 1739%Apr 1739%Oct 640%Oct 640%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 71%68%68%61%56%54%49%51%56%64%70%72%
Clearer 29%32%32%39%44%46%51%49%44%36%30%28%

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

The wetter season lasts 4.5 months, from September 20 to February 4, with a greater than 41% chance of a given day being a wet day. The month with the most wet days in Snowdonia is December, with an average of 15.2 days with at least 0.04 inches of precipitation.

The drier season lasts 7.5 months, from February 4 to September 20. The month with the fewest wet days in Snowdonia is June, with an average of 9.5 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 Snowdonia is November, with an average of 14.3 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 50% on November 2.

Daily Chance of Precipitation in Snowdonia

Daily Chance of Precipitation in SnowdoniawetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Dec 3052%Dec 3052%Apr 2329%Apr 2329%Sep 2041%Sep 2041%Feb 441%Feb 441%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 13.2d10.2d10.5d9.3d10.1d9.5d10.1d11.5d11.6d14.1d14.3d14.0d
Mixed 1.1d0.7d0.5d0.2d0.0d0.0d0.0d0.0d0.0d0.0d0.3d0.9d
Snow 0.5d0.4d0.3d0.1d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.3d
Any 14.8d11.3d11.3d9.5d10.1d9.5d10.1d11.5d11.6d14.1d14.6d15.2d

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. Snowdonia experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Snowdonia. The month with the most rain in Snowdonia is November, with an average rainfall of 4.1 inches.

The month with the least rain in Snowdonia is April, with an average rainfall of 2.0 inches.

Average Monthly Rainfall in Snowdonia

Average Monthly Rainfall in SnowdoniaJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 inNov 94.2 inNov 94.2 inApr 232.0 inApr 232.0 inDec 154.1 inDec 154.1 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 3.5″2.7″2.4″2.0″2.2″2.3″2.4″2.7″3.0″3.9″4.1″4.0″

Snowfall

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

The snowy period of the year lasts for 2.8 months, from December 5 to February 29, with a sliding 31-day snowfall of at least 1.0 inches. The month with the most snow in Snowdonia is January, with an average snowfall of 1.8 inches.

The snowless period of the year lasts for 9.2 months, from February 29 to December 5. The least snow falls around July 23, with an average total accumulation of 0.0 inches.

Average Monthly Snowfall in Snowdonia

Average Monthly Snowfall in SnowdoniasnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 in6 in6 inJan 81.8 inJan 81.8 inJul 230.0 inJul 230.0 inDec 51.0 inDec 51.0 inFeb 291.0 inFeb 291.0 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 1.8″1.3″0.7″0.2″0.0″0.0″0.0″0.0″0.0″0.0″0.4″1.4″

The length of the day in Snowdonia varies extremely over the course of the year. In 2024, the shortest day is December 21, with 7 hours, 33 minutes of daylight; the longest day is June 20, with 16 hours, 57 minutes of daylight.

Hours of Daylight and Twilight in Snowdonia

Hours of Daylight and Twilight in SnowdoniaJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 8 minMar 2012 hr, 8 minMar 2016 hr, 57 minJun 2016 hr, 57 minJun 2012 hr, 11 minSep 2212 hr, 11 minSep 227 hr, 33 minDec 217 hr, 33 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 8.2h9.9h11.9h14.0h15.9h16.9h16.3h14.7h12.6h10.5h8.7h7.6h

The earliest sunrise is at 4:49 AM on June 17, and the latest sunrise is 3 hours, 41 minutes later at 8:30 AM on December 30. The earliest sunset is at 3:58 PM on December 13, and the latest sunset is 5 hours, 48 minutes later at 9:47 PM on June 24.

Daylight saving time (DST) is observed in Snowdonia 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 Snowdonia

Sunrise & Sunset with Twilight and Daylight Saving Time in SnowdoniaJanFebMarAprMayJunJulAugSepOctNovDec2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 174:49 AMJun 174:49 AM9:47 PMJun 249:47 PMJun 24Dec 133:58 PMDec 133:58 PM8:30 AMDec 308:30 AMDec 30Mar 31DSTMar 31DSTDSTOct 27DSTOct 27daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunset
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 Snowdonia

Solar Elevation and Azimuth in SnowdoniaJanFebMarAprMayJunJulAugSepOctNovDec12 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 AM00001010102020303040405000010101010202030304040506013NowNow
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 Snowdonia

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 Snowdonia, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.

Humidity Comfort Levels in Snowdonia

Humidity Comfort Levels in SnowdoniaJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 40%Feb 40%Jul 150%Jul 150%NowNowdrydryhumidhumid
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 0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d0.0d

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Snowdonia experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.4 months, from October 11 to March 23, with average wind speeds of more than 10.8 miles per hour. The windiest month of the year in Snowdonia is January, with an average hourly wind speed of 13.1 miles per hour.

The calmer time of year lasts for 6.6 months, from March 23 to October 11. The calmest month of the year in Snowdonia is June, with an average hourly wind speed of 8.3 miles per hour.

Average Wind Speed in Snowdonia

Average Wind Speed in SnowdoniawindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mph18 mph18 mph20 mph20 mphJan 313.3 mphJan 313.3 mphJun 138.2 mphJun 138.2 mphOct 1110.8 mphOct 1110.8 mphMar 2310.8 mphMar 2310.8 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) 13.112.211.19.58.98.38.48.89.710.811.712.5

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

The wind is most often from the south for 1.7 months, from April 6 to May 28 and for 1.0 months, from September 29 to October 29, with a peak percentage of 36% on October 11. The wind is most often from the west for 4.0 months, from May 28 to September 29 and for 5.2 months, from October 29 to April 6, with a peak percentage of 42% on July 2.

Wind Direction in Snowdonia

Wind Direction in SnowdoniaWSWSWJanFebMarAprMayJunJulAugSepOctNovDec0%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).

Snowdonia 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 some seasonal variation over the course of the year.

The time of year with warmer water lasts for 3.3 months, from June 28 to October 6, with an average temperature above 58°F. The month of the year in Snowdonia with the warmest water is August, with an average temperature of 61°F.

The time of year with cooler water lasts for 3.7 months, from December 26 to April 16, with an average temperature below 48°F. The month of the year in Snowdonia with the coolest water is February, with an average temperature of 45°F.

Average Water Temperature in Snowdonia

Average Water Temperature in SnowdoniawarmcoolJanFebMarAprMayJunJulAugSepOctNovDec40°F40°F45°F45°F50°F50°F55°F55°F60°F60°F65°F65°FAug 1662°FAug 1662°F44°FFeb 2744°FFeb 27Jun 2858°FJun 2858°FOct 658°FOct 658°FDec 2648°FDec 2648°FApr 1648°FApr 1648°FNowNow
The daily average water temperature (purple line), with 25th to 75th and 10th to 90th percentile bands.
WaterJanFebMarAprMayJunJulAugSepOctNovDec
Temperature 46°F45°F45°F48°F52°F56°F60°F61°F60°F57°F53°F49°F

To characterize how pleasant the weather is in Snowdonia 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 Snowdonia for general outdoor tourist activities is from early July to late August, with a peak score in the last week of July.

Tourism Score in Snowdonia

Tourism Score in Snowdoniabest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810105.05.00.00.0NowNow 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 Snowdonia for hot-weather activities is for the entire month of July, with a peak score in the third week of July.

Beach/Pool Score in Snowdonia

Beach/Pool Score in SnowdoniaJanFebMarAprMayJunJulAugSepOctNovDec002244668810100.70.70.00.0NowNowtemperaturetemperature 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 Snowdonia typically lasts for 6.2 months (191 days), from around April 23 to around October 31, rarely starting before April 3 or after May 16, and rarely ending before October 7 or after November 24.

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

Time Spent in Various Temperature Bands and the Growing Season in Snowdoniagrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Apr 2350%Apr 2350%Oct 3150%Oct 3190%May 1690%May 1690%Oct 790%Oct 710%Apr 310%Apr 310%Nov 2410%Nov 240%Feb 60%Feb 6Jul 27100%Jul 27100%NowNowvery coldcoldcoolfreezingcomfortable
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 Snowdonia should appear around June 2, only rarely appearing before May 18 or after June 19.

Growing Degree Days in Snowdonia

Growing Degree Days in SnowdoniaJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F100°F100°F200°F200°F300°F300°F400°F400°F500°F500°F600°F600°F700°F700°F800°F800°F900°F900°FJun 290°FJun 290°FDec 31776°FDec 31776°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.4 months, from May 1 to August 12, with an average daily incident shortwave energy per square meter above 5.0 kWh. The brightest month of the year in Snowdonia is June, with an average of 6.0 kWh.

The darker period of the year lasts for 4.0 months, from October 22 to February 22, with an average daily incident shortwave energy per square meter below 1.6 kWh. The darkest month of the year in Snowdonia is December, with an average of 0.5 kWh.

Average Daily Incident Shortwave Solar Energy in Snowdonia

Average Daily Incident Shortwave Solar Energy in SnowdoniabrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 216.1 kWhJun 216.1 kWhDec 240.5 kWhDec 240.5 kWhMay 15.0 kWhMay 15.0 kWhAug 125.0 kWhAug 125.0 kWhOct 221.6 kWhOct 221.6 kWhFeb 221.6 kWhFeb 221.6 kWh
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) 0.71.42.64.25.56.05.84.83.41.90.90.5

For the purposes of this report, the geographical coordinates of Snowdonia are 53.083 deg latitude, -4.083 deg longitude, and 758 ft elevation.

The topography within 2 miles of Snowdonia contains large variations in elevation, with a maximum elevation change of 3,146 feet and an average elevation above sea level of 1,611 feet. Within 10 miles contains large variations in elevation (3,474 feet). Within 50 miles also contains extreme variations in elevation (3,484 feet).

The area within 2 miles of Snowdonia is covered by grassland (51%), sparse vegetation (31%), and shrubs (18%), within 10 miles by grassland (43%) and shrubs (19%), and within 50 miles by water (57%) and grassland (27%).

This report illustrates the typical weather in Snowdonia, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

The details of the data sources used for this report can be found on the Blaenau-Ffestiniog page.

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.