Kingston Weather in August (1981–2025)

📍 44.31°N, 76.46°W •
📊

August at a Glance in Kingston

(1981–2025)
Avg High
🔥
26.0°C
Avg Low
❄️
15.3°C
Avg Temp
🌡️
20.7°C
Avg Rain
🌧️
72 mm
Avg Humidity
💧
73%
Avg Wind
🌬️
0.4 m/s
Avg Solar
☀️
5.2
kWh/m²/day
vs Annual
📈
+13.5°C
temp difference
🌡️Warm afternoons🌤️Cool mornings☀️Very sunny🌧️Wet month🍃Light winds😊Comfortable humidity

Kingston August Weather Overview

August is one of the warmer months of the year in Kingston, with average highs near 26°C and lows around 15.3°C (mean 20.7°C). It is about average for rainfall, averaging 72 mm of rainfall and 73% relative humidity across the period.

Kingston August Temperature History (1981–2025)

Range

August is one of the warmer months of the year in Kingston. Across 45 years of records, the warmest August in Kingston was 2021 — when the month averaged 24°C — while the coldest was 1982 at 17.1°C. Typical August days reach 26°C with nights near 15.3°C. The long-term trend is warming, about 0.7°C per decade.

1981–1985 vs 2021–2025

Avg Temp19.2°C→21.9°C+2.7°C
Max Temp24.4°C→27.4°C+3°C
Min Temp14.1°C→16.4°C+2.3°C

Trend (per decade)

Avg Temp+0.7°C/decade ↗
Max Temp+0.8°C/decade ↗
Min Temp+0.6°C/decade ↗

Distribution of Avg Temp

17.0°C–18.8°C4 yr (9%)
18.8°C–20.5°C17 yr (38%)
20.5°C–22.3°C17 yr (38%)
22.3°C–24.0°C7 yr (16%)

Kingston August Rainfall History (1981–2025)

Range

August is about average for rainfall in Kingston, averaging 72 mm of rainfall. The wettest August on record was 2020 with 136 mm, while the driest was 2002 at 27 mm.

Kingston August Humidity History (1981–2025)

Range

Relative humidity in Kingston during August averages 73%. The most humid August was 2000 at 82%, and the least humid was 2025 at 64%.

Kingston August Solar History (1981–2025)

Range

August receives about 5.2 kWh/m²/day of solar energy in Kingston. The sunniest August was 2002 at 5.7 kWh/m²/day, and the cloudiest were 1988 and 2024 at 4.6.

Kingston August Wind History (1981–2025)

Range

Average wind speed in Kingston during August is 0.4 m/s. The windiest Augusts were 2020, 2023 and 2024, among others at 0.5 m/s, while the calmest were 2021, 2022 and 2025, among others at 0.4 m/s.

What August Feels Like in Kingston

🌅
Cool
Morning
🌞
Warm
Afternoon
🌆
Mild
Evening
Rain chanceModerate
Outdoor comfort★★★★☆

How August Ranks in Kingston

🔥2nd warmest month of the year
🌧️3rd wettest month of the year
☀️4th sunniest month of the year

Ranked against the other 11 months using 1981–2025 averages.

Explore Kingston Weather by Month

Kingston August Averages by Decade

Metric1980s1990s2000s2010s2020sChange
Avg Temp19.4°C19.7°C21.1°C21.5°C21.8°C+2.4°C
Avg High24.7°C25.0°C26.6°C26.9°C27.3°C+2.6°C
Avg Low14.1°C14.4°C15.6°C16.1°C16.4°C+2.3°C
Avg Rain88 mm72 mm56 mm63 mm87 mm0 mm

Extreme August Records in Kingston

🔥Warmest August35.5°C2006
🧊Coldest August4.4°C1982
🌧️Wettest August136 mm2020
🏜️Driest August27 mm2002
🌬️Windiest August0.5 m/s1986

Key Insights for August

✅

August temperatures in Kingston have risen by about 2.7°C between 1981–1985 and 2021–2025.

✅

August has ranged from a record low of 4.4°C (1982) to a record high of 35.5°C (2006).

✅

Rainfall in August is about average for rainfall, averaging 72 mm, with a wettest year of 136 mm.

✅

Daytime highs and overnight lows have shifted differently — highs rose about 0.8°C per decade while lows rose 0.6°C per decade, widening the gap between day and night.

Is August a Good Time to Visit Kingston?

One of the best times to visit Kingston

August is one of the best times to visit Kingston. Expect days averaging 26°C and nights around 15.3°C (mean 20.7°C) — warmer than Kingston's yearly average — with moderate rainfall (72 mm), so conditions are generally comfortable for sightseeing and outdoor plans.

See Kingston's complete weather history All 12 months side by side, 1981–2025 records, annual trends and long-term averages in one place. View full history →

Kingston Weather in August — In Depth

☀️ August climate overview

August is one of the warmer months of the year in Kingston, with average highs near 26°C and lows around 15.3°C (mean 20.7°C). It is about average for rainfall, averaging 72 mm of rainfall and 73% relative humidity across the period.

🌧️ Rain, humidity & wind in August

August averages 72 mm of rainfall in Kingston, about average for rainfall compared with the rest of the year. The wettest August on record saw 136 mm (2020), and the driest just 27 mm (2002). Humidity sits around 73% and average wind speed is 0.4 m/s, with solar radiation averaging 5.2 kWh/m²/day.

📈 How August has changed

Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 2.7°C. Daytime highs moved from 24.4°C to 27.4°C and overnight lows from 14.1°C to 16.4°C over the same span.
August Weather in Kingston, Year by Year
🔥 warmest❄️ coldest🌧️ wettest
YearAvg HighAvg TempAvg LowHottest DayColdest DayRainfallHumidityWindSolar
202527.4°C21.4°C15.3°C33.7°C9.3°C49 mm64%0.4 m/s5.3
202426.0°C20.9°C15.8°C32.0°C10.6°C127 mm76%0.5 m/s4.6
202326.0°C20.5°C15.1°C29.3°C8.9°C87 mm72%0.5 m/s4.9
202228.4°C22.8°C17.2°C32.6°C12.4°C72 mm69%0.4 m/s5.2
2021 🔥29.3°C24.0°C18.7°C33.6°C13.0°C51 mm70%0.4 m/s5.1
2020 🌧️26.5°C21.3°C16.2°C30.6°C10.3°C136 mm74%0.5 m/s5.3
201926.3°C20.8°C15.3°C29.1°C11.3°C66 mm71%0.5 m/s5.6
201827.7°C22.7°C17.8°C31.0°C11.7°C63 mm76%0.4 m/s4.9
201724.7°C19.8°C14.9°C28.2°C8.5°C71 mm76%0.5 m/s5.2
201629.2°C23.6°C17.9°C34.5°C11.1°C78 mm68%0.4 m/s5.4
201526.9°C21.5°C16.1°C31.9°C13.2°C47 mm69%0.5 m/s5
201425.7°C20.2°C14.7°C30.4°C10.4°C72 mm72%0.4 m/s5
201326.9°C21.2°C15.5°C30.4°C9.7°C58 mm69%0.4 m/s5.2
201228.0°C22.3°C16.6°C33.4°C10.6°C43 mm65%0.5 m/s5.3
201126.7°C21.5°C16.3°C31.3°C11.4°C69 mm72%0.4 m/s5
201027.2°C21.7°C16.1°C32.9°C10.3°C64 mm69%0.4 m/s5
200926.2°C21.0°C15.7°C32.4°C8.5°C61 mm74%0.4 m/s5.1
200825.2°C19.9°C14.6°C29.1°C8.9°C71 mm75%0.4 m/s5.4
200727.6°C21.4°C15.3°C33.4°C10.2°C32 mm67%0.4 m/s5.4
200627.1°C21.3°C15.6°C35.5°C8.3°C32 mm65%0.4 m/s5.6
200528.2°C22.6°C17.0°C34.1°C11.2°C64 mm68%0.4 m/s5.2
200424.6°C19.5°C14.3°C30.4°C9.1°C61 mm75%0.4 m/s4.7
200327.4°C22.0°C16.7°C32.5°C10.1°C52 mm71%0.4 m/s5.2
200227.7°C21.8°C15.9°C33.1°C10.9°C27 mm67%0.4 m/s5.7
200128.1°C22.3°C16.4°C35.0°C10.5°C47 mm67%0.4 m/s5.4
200023.8°C19.1°C14.4°C27.6°C8.0°C117 mm82%0.4 m/s5.1
199925.2°C19.8°C14.3°C30.7°C9.6°C53 mm70%0.4 m/s4.8
199826.2°C21.2°C16.2°C30.0°C10.0°C97 mm74%0.4 m/s5
199724.9°C19.2°C13.6°C29.7°C8.9°C63 mm71%0.4 m/s5
199624.4°C19.3°C14.1°C28.6°C8.8°C40 mm79%0.4 m/s5.5
199527.3°C21.0°C14.7°C33.2°C8.9°C70 mm69%0.4 m/s5.4
199423.6°C18.2°C12.9°C27.6°C7.4°C83 mm77%0.4 m/s5.3
199325.2°C20.1°C15.1°C29.4°C10.1°C45 mm79%0.4 m/s5.4
199222.9°C17.9°C12.9°C28.1°C8.7°C112 mm78%0.4 m/s4.8
199125.6°C20.3°C15.0°C30.7°C9.6°C76 mm75%0.4 m/s5.2
199025.0°C19.9°C14.9°C28.0°C9.4°C83 mm79%0.4 m/s5.4
198925.0°C19.5°C14.0°C29.4°C6.2°C63 mm71%0.4 m/s5.1
198826.6°C21.2°C15.8°C33.7°C8.7°C96 mm71%0.4 m/s4.6
198725.7°C19.8°C14.0°C32.0°C8.4°C64 mm65%0.4 m/s5.3
198623.0°C18.1°C13.2°C27.4°C5.8°C109 mm77%0.5 m/s4.8
198524.4°C19.0°C13.5°C29.5°C9.0°C82 mm72%0.4 m/s5
198425.3°C20.4°C15.6°C31.0°C7.0°C109 mm81%0.4 m/s5.4
198325.8°C20.4°C15.1°C29.7°C8.2°C81 mm75%0.4 m/s—
1982 ❄️22.4°C17.1°C11.8°C26.6°C4.4°C70 mm76%0.4 m/s—
198124.1°C19.2°C14.3°C28.1°C8.6°C114 mm79%0.4 m/s—

Actual recorded August data for each year, 1981–2025 — sourced from NASA POWER.

Other Cities in Ontario

Kingston August Weather — FAQ

What is the average temperature in Kingston in August?▼

The average high in August is around 26°C with lows near 15.3°C (mean 20.7°C), based on 45 years of NASA POWER data.

Does it rain a lot in Kingston in August?▼

August averages 72 mm of rainfall in Kingston, about average for rainfall. The wettest on record was 136 mm in 2020.

What was the hottest August on record in Kingston?▼

The hottest August reached 35.5°C in 2006. The coldest dipped to 4.4°C in 1982.

Has August in Kingston gotten warmer over time?▼

Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average August temperatures have risen by about 2.7°C. Daytime highs moved from 24.4°C to 27.4°C and overnight lows from 14.1°C to 16.4°C over the same span.

Is August a good time to visit Kingston?▼

August is one of the warmer months of the year in Kingston and about average for rainfall, so plan for around 26°C daytime highs and 15.3°C at night.

Is August the coldest month in Kingston?▼

Not quite — August is the 11th coolest month in Kingston, averaging 20.7°C.

What should I pack for Kingston in August?▼

For August in Kingston, pack light layers you can adjust through the day, with typical highs of 26°C and lows of 15.3°C. Bring an umbrella or light rain jacket too.

Is Kingston humid in August?▼

Relative humidity in August averages 73% — moderately humid.

How windy is Kingston in August?▼

Average wind speed in August is 0.4 m/s. The windiest August on record averaged 0.5 m/s (1986).

Which August had the most rainfall in Kingston?▼

The wettest August on record was 2020 with 136 mm. On average, August sees 72 mm.

Where does this August weather data come from?▼

All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.

Other Ontario cities

Explore how the weather in Kingston behaves each August, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for August specifically, along with year-by-year records and how the month has changed over the decades.