Summer Weather in Charlottetown Canada

Daily high temperatures increase by 8°F, from 62°F to 70°F, rarely falling below 51°F or exceeding 82°F. The highest daily average high temperature is 74°F on July 31.

Daily low temperatures increase by 10°F, from 47°F to 56°F, rarely falling below 39°F or exceeding 67°F. The highest daily average low temperature is 61°F on August 1.

For reference, on July 27, the hottest day of the year, temperatures in Charlottetown typically range from 61°F to 74°F, while on January 30, the coldest day of the year, they range from 11°F to 26°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.

Bihoro, Japan (6,002 miles away) is the far-away foreign place with temperatures most similar to Charlottetown (view comparison).

© OpenStreetMap contributors

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The summer in Charlottetown experiences very rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 58% to 40%.

The clearest day of the summer is August 31, with clear, mostly clear, or partly cloudy conditions 60% of the time.

For reference, on February 16, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 69%, while on September 2, 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 Charlottetown, the chance of a wet day over the course of the summer is gradually decreasing, starting the season at 31% and ending it at 29%.

For reference, the year's highest daily chance of a wet day is 35% on December 14, and its lowest chance is 27% on March 12.

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 Charlottetown is essentially constant, remaining about 2.6 inches throughout, and rarely exceeding 4.9 inches or falling below 1.0 inches.

Over the course of the summer in Charlottetown, 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, 14 minutes, implying an average daily decrease of 1 minute, 28 seconds, and weekly decrease of 10 minutes, 16 seconds.

The shortest day of the summer is August 31, with 13 hours, 20 minutes of daylight and the longest day is June 20, with 15 hours, 47 minutes of daylight.

The earliest sunrise of the summer in Charlottetown is 5:20 AM on June 15 and the latest sunrise is 1 hour, 12 minutes later at 6:32 AM on August 31.

The latest sunset is 9:08 PM on June 25 and the earliest sunset is 1 hour, 16 minutes earlier at 7:52 PM on August 31.

Daylight saving time is observed in Charlottetown 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 5:20 AM and sets 15 hours, 47 minutes later, at 9:07 PM, while on December 21, the shortest day of the year, it rises at 7:52 AM and sets 8 hours, 37 minutes later, at 4:29 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 Charlottetown is increasing during the summer, rising from 0% to 7% over the course of the season.

The highest chance of a muggy day during the summer is 15% on August 1.

For reference, on August 1, the muggiest day of the year, there are muggy conditions 15% of the time, while on November 7, 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 Charlottetown is gradually increasing during the summer, increasing from 10.3 miles per hour to 11.2 miles per hour over the course of the season.

For reference, on January 8, the windiest day of the year, the daily average wind speed is 15.2 miles per hour, while on July 31, the calmest day of the year, the daily average wind speed is 9.8 miles per hour.

The lowest daily average wind speed during the summer is 9.8 miles per hour on August 1.

The wind direction in Charlottetown during the summer is predominantly out of the south from June 1 to August 1 and the west from August 1 to August 31.

Charlottetown 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 in Charlottetown is very rapidly increasing during the summer, rising by 19°F, from 45°F to 64°F, over the course of the season.

The highest average surface water temperature during the summer is 65°F on August 13.

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 Charlottetown typically lasts for 5.6 months (171 days), from around May 7 to around October 25, rarely starting before April 17 or after May 25, and rarely ending before October 8 or after November 11.

The summer in Charlottetown is very likely fully within the growing season, with the chance that a given day is in the growing season gradually increasing from 97% to 100% over the course of the 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 in Charlottetown are very rapidly increasing during the summer, increasing by 1,245°F, from 125°F to 1,371°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 Charlottetown is gradually decreasing during the summer, falling by 1.0 kWh, from 6.1 kWh to 5.1 kWh, over the course of the season.

The highest average daily incident shortwave solar energy during the summer is 6.6 kWh on July 1.

For the purposes of this report, the geographical coordinates of Charlottetown are 46.239 deg latitude, -63.134 deg longitude, and 23 ft elevation.

The topography within 2 miles of Charlottetown contains only modest variations in elevation, with a maximum elevation change of 108 feet and an average elevation above sea level of 20 feet. Within 10 miles also contains only modest variations in elevation (348 feet). Within 50 miles contains only modest variations in elevation (1,175 feet).

The area within 2 miles of Charlottetown is covered by water (41%), artificial surfaces (35%), and trees (10%), within 10 miles by cropland (45%) and water (28%), and within 50 miles by water (61%) and trees (25%).