Summer Weather in Gainesville Florida, United States

Daily high temperatures are around 89°F, rarely falling below 83°F or exceeding 94°F. The highest daily average high temperature is 90°F on July 17.

Daily low temperatures increase by 4°F, from 68°F to 72°F, rarely falling below 62°F or exceeding 76°F. The highest daily average low temperature is 73°F on August 6.

For reference, on July 17, the hottest day of the year, temperatures in Gainesville typically range from 72°F to 90°F, while on January 14, the coldest day of the year, they range from 44°F to 66°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.

Al Hadā, Saudi Arabia (7,251 miles away) is the far-away foreign place with temperatures most similar to Gainesville (view comparison).

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The summer in Gainesville experiences increasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy increasing from 47% to 57%. The highest chance of overcast or mostly cloudy conditions is 64% on July 11.

The clearest day of the summer is June 1, with clear, mostly clear, or partly cloudy conditions 53% of the time.

For reference, on July 11, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 64%, while on October 26, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 66%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Gainesville, the chance of a wet day over the course of the summer is very rapidly increasing, starting the season at 44% and ending it at 55%.

For reference, the year's highest daily chance of a wet day is 69% on July 26, and its lowest chance is 17% on November 21.

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 Gainesville is rapidly increasing, starting the season at 4.1 inches, when it rarely exceeds 6.6 inches or falls below 2.0 inches, and ending the season at 5.4 inches, when it rarely exceeds 9.7 inches or falls below 2.8 inches.

The highest average 31-day accumulation is 6.0 inches on June 28.

Over the course of the summer in Gainesville, the length of the day is rapidly decreasing. From the start to the end of the season, the length of the day decreases by 1 hour, 10 minutes, implying an average daily decrease of 46 seconds, and weekly decrease of 5 minutes, 25 seconds.

The shortest day of the summer is August 31, with 12 hours, 46 minutes of daylight and the longest day is June 20, with 14 hours, 3 minutes of daylight.

The earliest sunrise of the summer in Gainesville is 6:28 AM on June 10 and the latest sunrise is 38 minutes later at 7:06 AM on August 31.

The latest sunset is 8:33 PM on June 29 and the earliest sunset is 42 minutes earlier at 7:51 PM on August 31.

Daylight saving time is observed in Gainesville 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 6:29 AM and sets 14 hours, 3 minutes later, at 8:32 PM, while on December 21, the shortest day of the year, it rises at 7:20 AM and sets 10 hours, 15 minutes later, at 5:34 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 Gainesville is very rapidly increasing during the summer, rising from 71% to 96% over the course of the season.

The highest chance of a muggy day during the summer is 99% on August 5.

For reference, on August 3, the muggiest day of the year, there are muggy conditions 99% of the time, while on January 24, the least muggy day of the year, there are muggy conditions 3% 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 Gainesville is gradually decreasing during the summer, decreasing from 5.2 miles per hour to 4.6 miles per hour over the course of the season.

For reference, on March 8, the windiest day of the year, the daily average wind speed is 6.4 miles per hour, while on July 22, the calmest day of the year, the daily average wind speed is 4.2 miles per hour.

The lowest daily average wind speed during the summer is 4.2 miles per hour on July 22.

The wind direction in Gainesville during the summer is predominantly out of the west from June 1 to August 16 and the east from August 16 to August 31.

Gainesville 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 Gainesville is gradually increasing during the summer, rising by 3°F, from 81°F to 85°F, over the course of the season.

The highest average surface water temperature during the summer is 86°F on July 26.

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 Gainesville typically lasts for 9.6 months (292 days), from around February 20 to around December 8, rarely starting before January 28 or after March 19, and rarely ending before November 13 or after December 31.

The summer in Gainesville 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 in Gainesville are very rapidly increasing during the summer, increasing by 2,597°F, from 2,227°F to 4,824°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 Gainesville is decreasing during the summer, falling by 1.3 kWh, from 6.2 kWh to 5.0 kWh, over the course of the season.

For the purposes of this report, the geographical coordinates of Gainesville are 29.652 deg latitude, -82.325 deg longitude, and 174 ft elevation.

The topography within 2 miles of Gainesville contains only modest variations in elevation, with a maximum elevation change of 128 feet and an average elevation above sea level of 142 feet. Within 10 miles also contains only modest variations in elevation (148 feet). Within 50 miles also contains only modest variations in elevation (285 feet).

The area within 2 miles of Gainesville is covered by artificial surfaces (78%) and trees (15%), within 10 miles by herbaceous vegetation (39%) and trees (36%), and within 50 miles by trees (45%) and cropland (22%).