Climate and Average Weather Year Round in Isle of Wight United Kingdom

In Isle of Wight, the summers are comfortable, the winters are long and very cold, and it is windy and partly cloudy year round. Over the course of the year, the temperature typically varies from 38°F to 67°F and is rarely below 30°F or above 74°F.

Based on the tourism score, the best time of year to visit Isle of Wight for warm-weather activities is from late June to early September.

The warm season lasts for 3.0 months, from June 17 to September 18, with an average daily high temperature above 63°F. The hottest month of the year in Isle of Wight is August, with an average high of 67°F and low of 56°F.

The cool season lasts for 4.0 months, from November 25 to March 26, with an average daily high temperature below 50°F. The coldest month of the year in Isle of Wight is February, with an average low of 39°F and high of 46°F.

In Isle of Wight, 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 Isle of Wight begins around March 31 and lasts for 6.5 months, ending around October 13.

The clearest month of the year in Isle of Wight is July, during which on average the sky is clear, mostly clear, or partly cloudy 58% of the time.

The cloudier part of the year begins around October 13 and lasts for 5.5 months, ending around March 31.

The cloudiest month of the year in Isle of Wight is December, during which on average the sky is overcast or mostly cloudy 64% of the time.

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

The wetter season lasts 4.3 months, from September 27 to February 7, with a greater than 28% chance of a given day being a wet day. The month with the most wet days in Isle of Wight is November, with an average of 10.3 days with at least 0.04 inches of precipitation.

The drier season lasts 7.6 months, from February 7 to September 27. The month with the fewest wet days in Isle of Wight is July, with an average of 6.1 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 Isle of Wight is November, with an average of 10.3 days. Based on this categorization, the most common form of precipitation throughout the year is rain alone, with a peak probability of 36% on December 29.

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. Isle of Wight experiences some seasonal variation in monthly rainfall.

Rain falls throughout the year in Isle of Wight. The month with the most rain in Isle of Wight is November, with an average rainfall of 2.6 inches.

The month with the least rain in Isle of Wight is July, with an average rainfall of 1.3 inches.

The length of the day in Isle of Wight varies extremely over the course of the year. In 2024, the shortest day is December 21, with 7 hours, 58 minutes of daylight; the longest day is June 20, with 16 hours, 29 minutes of daylight.

The earliest sunrise is at 4:52 AM on June 16, and the latest sunrise is 3 hours, 15 minutes later at 8:07 AM on December 30. The earliest sunset is at 4:00 PM on December 12, and the latest sunset is 5 hours, 22 minutes later at 9:22 PM on June 25.

Daylight saving time (DST) is observed in Isle of Wight during 2024, starting in the spring on March 31, lasting 6.9 months, and ending in the fall on October 27.

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.

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 Isle of Wight, 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.

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 Isle of Wight experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.4 months, from October 6 to March 18, with average wind speeds of more than 14.4 miles per hour. The windiest month of the year in Isle of Wight is January, with an average hourly wind speed of 17.1 miles per hour.

The calmer time of year lasts for 6.6 months, from March 18 to October 6. The calmest month of the year in Isle of Wight is June, with an average hourly wind speed of 11.5 miles per hour.

The predominant average hourly wind direction in Isle of Wight is from the west throughout the year.

Isle of Wight 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 3.2 months, from July 8 to October 15, with an average temperature above 60°F. The month of the year in Isle of Wight with the warmest water is August, with an average temperature of 63°F.

The time of year with cooler water lasts for 3.9 months, from December 31 to April 25, with an average temperature below 49°F. The month of the year in Isle of Wight with the coolest water is March, with an average temperature of 46°F.

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

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 Isle of Wight for hot-weather activities is from mid July to mid August, with a peak score in the last week of July.

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 Isle of Wight typically lasts for 8.6 months (262 days), from around March 14 to around December 1, rarely starting before February 8 or after April 12, and rarely ending before November 2 or after December 30.

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 Isle of Wight should appear around May 8, only rarely appearing before April 22 or after May 26.

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 2 to August 15, with an average daily incident shortwave energy per square meter above 5.5 kWh. The brightest month of the year in Isle of Wight is June, with an average of 6.6 kWh.

The darker period of the year lasts for 3.9 months, from October 24 to February 20, with an average daily incident shortwave energy per square meter below 1.9 kWh. The darkest month of the year in Isle of Wight is December, with an average of 0.8 kWh.

For the purposes of this report, the geographical coordinates of Isle of Wight are 50.667 deg latitude, -1.333 deg longitude, and 0 ft elevation.

The topography within 2 miles of Isle of Wight is essentially flat, with a maximum elevation change of 0 feet and an average elevation above sea level of 0 feet. Within 10 miles is also essentially flat (0 feet). Within 50 miles is also essentially flat (0 feet).

The area within 2 miles of Isle of Wight is covered by cropland (60%) and grassland (34%), within 10 miles by water (50%) and cropland (21%), and within 50 miles by water (55%) and cropland (19%).