Summer Weather at Bristol Airport United Kingdom

Daily high temperatures are around 66°F, rarely falling below 56°F or exceeding 79°F. The highest daily average high temperature is 69°F on July 25.

Daily low temperatures increase by 4°F, from 49°F to 54°F, rarely falling below 44°F or exceeding 61°F. The highest daily average low temperature is 56°F on July 30.

For reference, on July 24, the hottest day of the year, temperatures at Bristol Airport typically range from 56°F to 69°F, while on February 7, the coldest day of the year, they range from 36°F to 45°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.

Oak Bay, British Columbia, Canada (4,706 miles away) is the far-away foreign place with temperatures most similar to Bristol Airport (view comparison).

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The summer at Bristol Airport experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 51% to 46%. The lowest chance of overcast or mostly cloudy conditions is 42% on July 15.

The clearest day of the summer is July 15, with clear, mostly clear, or partly cloudy conditions 58% of the time.

For reference, on December 26, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 69%, while on July 15, 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 Bristol Airport, the chance of a wet day over the course of the summer is gradually decreasing, starting the season at 27% and ending it at 25%.

For reference, the year's highest daily chance of a wet day is 38% on December 29, and its lowest chance is 23% 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 Bristol Airport is essentially constant, remaining about 1.7 inches throughout, and rarely exceeding 3.3 inches or falling below 0.5 inches.

Over the course of the summer at Bristol 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, 43 minutes, implying an average daily decrease of 1 minute, 48 seconds, and weekly decrease of 12 minutes, 34 seconds.

The shortest day of the summer is August 31, with 13 hours, 36 minutes of daylight and the longest day is June 20, with 16 hours, 37 minutes of daylight.

The earliest sunrise of the summer at Bristol Airport is 4:53 AM on June 16 and the latest sunrise is 1 hour, 29 minutes later at 6:22 AM on August 31.

The latest sunset is 9:31 PM on June 24 and the earliest sunset is 1 hour, 33 minutes earlier at 7:58 PM on August 31.

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

For reference, on June 20, the longest day of the year, the Sun rises at 4:54 AM and sets 16 hours, 37 minutes later, at 9:31 PM, while on December 21, the shortest day of the year, it rises at 8:13 AM and sets 7 hours, 51 minutes later, at 4:04 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 Bristol 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 10.

For reference, on August 9, 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 Bristol Airport is essentially constant during the summer, remaining within 0.3 miles per hour of 10.2 miles per hour throughout.

For reference, on January 3, the windiest day of the year, the daily average wind speed is 13.6 miles per hour, while on August 2, the calmest day of the year, the daily average wind speed is 9.9 miles per hour.

The lowest daily average wind speed during the summer is 9.9 miles per hour on August 2.

The hourly average wind direction at Bristol Airport throughout the summer is predominantly from the west, with a peak proportion of 49% on July 2.

Bristol 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 Bristol Airport is rapidly increasing during the summer, rising by 8°F, from 56°F to 63°F, over the course of the season.

The highest average surface water temperature during the summer is 64°F on August 15.

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 Bristol Airport typically lasts for 8.0 months (246 days), from around March 25 to around November 25, rarely starting before February 9 or after April 22, and rarely ending before October 27 or after December 28.

The summer at Bristol 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 Bristol Airport are very rapidly increasing during the summer, increasing by 945°F, from 213°F to 1,157°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 Bristol Airport is decreasing during the summer, falling by 1.5 kWh, from 6.1 kWh to 4.6 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 Bristol Airport are 51.383 deg latitude, -2.719 deg longitude, and 604 ft elevation.

The topography within 2 miles of Bristol Airport contains significant variations in elevation, with a maximum elevation change of 545 feet and an average elevation above sea level of 492 feet. Within 10 miles contains significant variations in elevation (1,073 feet). Within 50 miles contains very significant variations in elevation (2,940 feet).

The area within 2 miles of Bristol Airport is covered by grassland (62%), cropland (18%), and trees (13%), within 10 miles by grassland (45%) and artificial surfaces (19%), and within 50 miles by grassland (37%) and cropland (35%).