Summer Weather in Prince George British Columbia, Canada

Daily high temperatures are around 71°F, rarely falling below 58°F or exceeding 86°F. The highest daily average high temperature is 76°F on August 2.

Daily low temperatures are around 48°F, rarely falling below 37°F or exceeding 58°F. The highest daily average low temperature is 51°F on July 23.

For reference, on August 1, the hottest day of the year, temperatures in Prince George typically range from 51°F to 76°F, while on January 1, the coldest day of the year, they range from 12°F to 24°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.

Băile Tuşnad, Romania (5,287 miles away) and Aydarken, Kyrgyzstan (5,904 miles) are the far-away foreign places with temperatures most similar to Prince George (view comparison).

© OpenStreetMap contributors

Compare Prince George to another city:

CompareMap

The summer in Prince George experiences gradually decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 54% to 49%. The lowest chance of overcast or mostly cloudy conditions is 40% on August 1.

The clearest day of the summer is August 1, with clear, mostly clear, or partly cloudy conditions 60% of the time.

For reference, on February 5, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 76%, while on August 1, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 60%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Prince George, 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 40% on November 3, and its lowest chance is 18% on July 31.

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 Prince George is essentially constant, remaining about 1.7 inches throughout, and rarely exceeding 3.8 inches or falling below 0.4 inches.

Over the course of the summer in Prince George, 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, 3 minutes, implying an average daily decrease of 2 minutes, 1 second, and weekly decrease of 14 minutes, 4 seconds.

The shortest day of the summer is August 31, with 13 hours, 44 minutes of daylight and the longest day is June 20, with 17 hours, 8 minutes of daylight.

The earliest sunrise of the summer in Prince George is 4:38 AM on June 17 and the latest sunrise is 1 hour, 40 minutes later at 6:18 AM on August 31.

The latest sunset is 9:46 PM on June 24 and the earliest sunset is 1 hour, 44 minutes earlier at 8:02 PM on August 31.

Daylight saving time is observed in Prince George during 2025, but it neither starts nor ends during the summer, so the entire season is in daylight saving time.

For reference, on June 21, the longest day of the year, the Sun rises at 4:39 AM and sets 17 hours, 8 minutes later, at 9:46 PM, while on December 21, the shortest day of the year, it rises at 8:27 AM and sets 7 hours, 23 minutes later, at 3:51 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 2025. 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 Prince George is essentially constant during the summer, remaining around 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 Prince George is essentially constant during the summer, remaining within 0.1 miles per hour of 3.5 miles per hour throughout.

For reference, on December 10, the windiest day of the year, the daily average wind speed is 4.5 miles per hour, while on August 4, the calmest day of the year, the daily average wind speed is 3.3 miles per hour.

The lowest daily average wind speed during the summer is 3.3 miles per hour on August 5.

The hourly average wind direction in Prince George throughout the summer is predominantly from the west, with a peak proportion of 58% on July 17.

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 Prince George typically lasts for 4.1 months (128 days), from around May 14 to around September 19, rarely starting before April 27 or after May 31, and rarely ending before August 30 or after October 6.

The summer in Prince George is more likely than not fully within the growing season, with the chance that a given day is in the growing season reaching a high of 100% on July 17.

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 Prince George are very rapidly increasing during the summer, increasing by 948°F, from 198°F to 1,147°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 Prince George is rapidly decreasing during the summer, falling by 1.6 kWh, from 6.2 kWh to 4.5 kWh, over the course of the season.

The highest average daily incident shortwave solar energy during the summer is 6.4 kWh on June 15.

For the purposes of this report, the geographical coordinates of Prince George are 53.917 deg latitude, -122.753 deg longitude, and 1,900 ft elevation.

The topography within 2 miles of Prince George contains only modest variations in elevation, with a maximum elevation change of 469 feet and an average elevation above sea level of 1,969 feet. Within 10 miles contains only modest variations in elevation (1,247 feet). Within 50 miles contains very significant variations in elevation (4,770 feet).

The area within 2 miles of Prince George is covered by artificial surfaces (38%), sparse vegetation (24%), and trees (21%), within 10 miles by trees (63%) and grassland (12%), and within 50 miles by trees (81%).