Summer Weather in Devon Canada

Daily high temperatures are around 71°F, rarely falling below 56°F or exceeding 83°F. The highest daily average high temperature is 74°F on August 4.

Daily low temperatures are around 49°F, rarely falling below 38°F or exceeding 59°F. The highest daily average low temperature is 53°F on July 23.

For reference, on August 4, the hottest day of the year, temperatures in Devon typically range from 52°F to 74°F, while on January 1, the coldest day of the year, they range from 5°F to 19°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.

Ves’yegonsk, Russia (4,534 miles away); Hnaberd, Armenia (5,816 miles); and Yazykovo, Russia (4,926 miles) are the far-away foreign places with temperatures most similar to Devon (view comparison).

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The summer in Devon experiences decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 55% to 45%. The lowest chance of overcast or mostly cloudy conditions is 39% on August 4.

The clearest day of the summer is August 4, with clear, mostly clear, or partly cloudy conditions 61% of the time.

For reference, on February 20, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 68%, while on August 4, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 61%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Devon, the chance of a wet day over the course of the summer is rapidly decreasing, starting the season at 29% and ending it at 21%.

For reference, the year's highest daily chance of a wet day is 36% on June 23, and its lowest chance is 5% on February 10.

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 in Devon is decreasing, starting the season at 2.3 inches, when it rarely exceeds 3.8 inches or falls below 0.9 inches, and ending the season at 1.7 inches, when it rarely exceeds 3.1 inches or falls below 0.5 inches.

The highest average 31-day accumulation is 3.0 inches on July 2.

Over the course of the summer in Devon, 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 3 hours, 0 minutes, implying an average daily decrease of 1 minute, 59 seconds, and weekly decrease of 13 minutes, 50 seconds.

The shortest day of the summer is August 31, with 13 hours, 41 minutes of daylight and the longest day is June 20, with 17 hours, 1 minute of daylight.

The earliest sunrise of the summer in Devon is 5:06 AM on June 16 and the latest sunrise is 1 hour, 38 minutes later at 6:43 AM on August 31.

The latest sunset is 10:07 PM on June 24 and the earliest sunset is 1 hour, 42 minutes earlier at 8:25 PM on August 31.

Daylight saving time is observed in Devon 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 5:06 AM and sets 17 hours, 1 minute later, at 10:07 PM, while on December 21, the shortest day of the year, it rises at 8:48 AM and sets 7 hours, 30 minutes later, at 4:18 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 in Devon is essentially constant during the summer, remaining within 1% of 1% throughout.

The highest chance of a muggy day during the summer is 2% on July 30.

For reference, on July 24, the muggiest day of the year, there are muggy conditions 2% 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 in Devon is gradually decreasing during the summer, decreasing from 9.1 miles per hour to 8.5 miles per hour over the course of the season.

For reference, on January 30, the windiest day of the year, the daily average wind speed is 10.4 miles per hour, while on August 11, the calmest day of the year, the daily average wind speed is 7.8 miles per hour.

The lowest daily average wind speed during the summer is 7.8 miles per hour on August 11.

The hourly average wind direction in Devon throughout the summer is predominantly from the west, with a peak proportion of 40% on August 31.

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 Devon typically lasts for 4.3 months (132 days), from around May 12 to around September 21, rarely starting before April 24 or after May 30, and rarely ending before September 3 or after October 8.

The summer in Devon is very likely fully within the growing season, with the chance that a given day is in the growing season reaching a high of 100% on July 13.

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 in Devon are very rapidly increasing during the summer, increasing by 963°F, from 225°F to 1,188°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 in Devon is 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 July 9.

For the purposes of this report, the geographical coordinates of Devon are 53.367 deg latitude, -113.735 deg longitude, and 2,280 ft elevation.

The topography within 2 miles of Devon contains only modest variations in elevation, with a maximum elevation change of 289 feet and an average elevation above sea level of 2,251 feet. Within 10 miles also contains only modest variations in elevation (436 feet). Within 50 miles contains only modest variations in elevation (1,496 feet).

The area within 2 miles of Devon is covered by cropland (73%) and trees (16%), within 10 miles by cropland (88%), and within 50 miles by cropland (79%) and trees (15%).