Summer Weather at Exeter Airport United Kingdom

Daily high temperatures increase by 4°F, from 63°F to 67°F, rarely falling below 57°F or exceeding 78°F. The highest daily average high temperature is 70°F on July 27.

Daily low temperatures are around 51°F, rarely falling below 41°F or exceeding 60°F. The highest daily average low temperature is 54°F on July 29.

For reference, on July 26, the hottest day of the year, temperatures at Exeter Airport typically range from 54°F to 70°F, while on February 7, the coldest day of the year, they range from 36°F to 47°F.

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

South Bend, United States (4,836 miles away) is the far-away foreign place with temperatures most similar to Exeter Airport (view comparison).

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The summer at Exeter Airport experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 50% to 46%. The lowest chance of overcast or mostly cloudy conditions is 42% on July 23.

The clearest day of the summer is July 23, with clear, mostly clear, or partly cloudy conditions 58% of the time.

For reference, on December 24, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 66%, while on July 23, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 58%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. At Exeter Airport, the chance of a wet day over the course of the summer is essentially constant, remaining around 24% throughout.

For reference, the year's highest daily chance of a wet day is 41% on December 29, and its lowest chance is 21% on July 24.

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the summer at Exeter Airport is essentially constant, remaining about 1.8 inches throughout, and rarely exceeding 3.6 inches or falling below 0.4 inches.

The lowest average 31-day accumulation is 1.7 inches on July 21.

Over the course of the summer at Exeter Airport, the length of the day is very rapidly decreasing. From the start to the end of the season, the length of the day decreases by 2 hours, 39 minutes, implying an average daily decrease of 1 minute, 45 seconds, and weekly decrease of 12 minutes, 14 seconds.

The shortest day of the summer is August 31, with 13 hours, 33 minutes of daylight and the longest day is June 20, with 16 hours, 30 minutes of daylight.

The earliest sunrise of the summer at Exeter Airport is 5:00 AM on June 16 and the latest sunrise is 1 hour, 27 minutes later at 6:26 AM on August 31.

The latest sunset is 9:30 PM on June 25 and the earliest sunset is 1 hour, 31 minutes earlier at 8:00 PM on August 31.

Daylight saving time is observed at Exeter Airport during 2024, but it neither starts nor ends during the summer, so the entire season is in standard time.

For reference, on June 20, the longest day of the year, the Sun rises at 5:00 AM and sets 16 hours, 30 minutes later, at 9:30 PM, while on December 21, the shortest day of the year, it rises at 8:13 AM and sets 7 hours, 57 minutes later, at 4:10 PM.

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.

The figure below presents a compact representation of key lunar data for the summer of 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

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 chance that a given day will be muggy at Exeter Airport is essentially constant during the summer, remaining around 0% throughout.

The highest chance of a muggy day during the summer is 1% on August 11.

For reference, on August 10, the muggiest day of the year, there are muggy conditions 1% of the time, while on January 1, the least muggy day of the year, there are muggy conditions 0% of the time.

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 Exeter Airport is gradually increasing during the summer, increasing from 10.9 miles per hour to 11.4 miles per hour over the course of the season.

For reference, on January 1, the windiest day of the year, the daily average wind speed is 15.7 miles per hour, while on August 2, the calmest day of the year, the daily average wind speed is 10.5 miles per hour.

The lowest daily average wind speed during the summer is 10.5 miles per hour on August 2.

The hourly average wind direction at Exeter Airport throughout the summer is predominantly from the west, with a peak proportion of 48% on July 2.

Exeter Airport 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 surface water temperature at Exeter Airport is rapidly increasing during the summer, rising by 8°F, from 55°F to 62°F, over the course of the season.

The highest average surface water temperature during the summer is 62°F on August 21.

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 Exeter Airport typically lasts for 6.4 months (194 days), from around April 17 to around October 29, rarely starting before March 26 or after May 11, and rarely ending before October 7 or after November 23.

The summer at Exeter Airport is reliably fully 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.

The average accumulated growing degree days at Exeter Airport are very rapidly increasing during the summer, increasing by 979°F, from 247°F to 1,226°F, over the course of the season.

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 at Exeter Airport is rapidly decreasing during the summer, falling by 1.5 kWh, from 6.2 kWh to 4.7 kWh, over the course of the season.

The highest average daily incident shortwave solar energy during the summer is 6.5 kWh on June 27.

For the purposes of this report, the geographical coordinates of Exeter Airport are 50.734 deg latitude, -3.414 deg longitude, and 82 ft elevation.

The topography within 2 miles of Exeter Airport contains only modest variations in elevation, with a maximum elevation change of 256 feet and an average elevation above sea level of 101 feet. Within 10 miles contains only modest variations in elevation (938 feet). Within 50 miles contains very significant variations in elevation (2,133 feet).

The area within 2 miles of Exeter Airport is covered by cropland (67%), grassland (22%), and artificial surfaces (11%), within 10 miles by cropland (51%) and grassland (23%), and within 50 miles by water (40%) and grassland (30%).