Peterborough Weather in August (1981–2025)

📍 44.30°N, 78.32°W •
📊

August at a Glance in Peterborough

(1981–2025)
Avg High
🔥
26.9°C
Avg Low
❄️
14.8°C
Avg Temp
🌡️
20.9°C
Avg Rain
🌧️
56 mm
Avg Humidity
💧
65%
Avg Wind
🌬️
0.5 m/s
Avg Solar
☀️
5.1
kWh/m²/day
vs Annual
📈
+14°C
temp difference
🌡️Warm afternoons🌤️Cool mornings☀️Very sunny🌦️Some rain🍃Light winds😊Comfortable humidity

Peterborough August Weather Overview

August is one of the warmer months of the year in Peterborough, with average highs near 26.9°C and lows around 14.8°C (mean 20.9°C). It is about average for rainfall, averaging 56 mm of rainfall and 65% relative humidity across the period.

Peterborough August Temperature History (1981–2025)

Range

August is one of the warmer months of the year in Peterborough. Across 45 years of records, the warmest August in Peterborough was 2021 — when the month averaged 24.2°C — while the coldest was 1982 at 17.9°C. Typical August days reach 26.9°C with nights near 14.8°C. The long-term trend is warming, about 0.5°C per decade.

1981–1985 vs 2021–2025

Avg Temp20.0°C→22.2°C+2.2°C
Max Temp26.0°C→28.4°C+2.4°C
Min Temp14.0°C→16.0°C+2°C

Trend (per decade)

Avg Temp+0.5°C/decade ↗
Max Temp+0.5°C/decade ↗
Min Temp+0.5°C/decade ↗

Distribution of Avg Temp

17.0°C–19.0°C4 yr (9%)
19.0°C–21.0°C17 yr (38%)
21.0°C–23.0°C21 yr (47%)
23.0°C–25.0°C3 yr (7%)

Peterborough August Rainfall History (1981–2025)

Range

August is about average for rainfall in Peterborough, averaging 56 mm of rainfall. The wettest August on record was 1992 with 118 mm, while the driest was 2021 at 22 mm.

Peterborough August Humidity History (1981–2025)

Range

Relative humidity in Peterborough during August averages 65%. The most humid August was 2004 at 75%, and the least humid was 2025 at 56%.

Peterborough August Solar History (1981–2025)

Range

August receives about 5.1 kWh/m²/day of solar energy in Peterborough. The sunniest August was 2002 at 5.7 kWh/m²/day, and the cloudiest were 1988 and 1989 at 4.7.

Peterborough August Wind History (1981–2025)

Range

Average wind speed in Peterborough during August is 0.5 m/s. The windiest Augusts were 2022, 2023 and 2025, among others at 0.5 m/s, while the calmest were 2013, 2021 and 2024, among others at 0.4 m/s.

What August Feels Like in Peterborough

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

How August Ranks in Peterborough

🔥2nd warmest month of the year
🌧️5th wettest month of the year
☀️4th sunniest month of the year

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

Explore Peterborough Weather by Month

Peterborough August Averages by Decade

Metric1980s1990s2000s2010s2020sChange
Avg Temp20.1°C20.4°C20.7°C21.5°C22.2°C+2.1°C
Avg High26.1°C26.5°C26.7°C27.5°C28.4°C+2.3°C
Avg Low14.0°C14.2°C14.8°C15.5°C16.0°C+2°C
Avg Rain64 mm64 mm57 mm47 mm47 mm-18 mm

Extreme August Records in Peterborough

🔥Warmest August36.6°C2006
🧊Coldest August4.4°C1982
🌧️Wettest August118 mm1992
🏜️Driest August22 mm2021
🌬️Windiest August0.5 m/s1982

Key Insights for August

✅

August temperatures in Peterborough have risen by about 2.2°C between 1981–1985 and 2021–2025.

✅

August has ranged from a record low of 4.4°C (1982) to a record high of 36.6°C (2006).

✅

Rainfall in August is about average for rainfall, averaging 56 mm, with a wettest year of 118 mm.

Is August a Good Time to Visit Peterborough?

One of the best times to visit Peterborough

August is one of the best times to visit Peterborough. Expect days averaging 26.9°C and nights around 14.8°C (mean 20.9°C) — warmer than Peterborough's yearly average — with moderate rainfall (56 mm), so conditions are generally comfortable for sightseeing and outdoor plans.

See Peterborough'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 →

Peterborough Weather in August — In Depth

☀️ August climate overview

August is one of the warmer months of the year in Peterborough, with average highs near 26.9°C and lows around 14.8°C (mean 20.9°C). It is about average for rainfall, averaging 56 mm of rainfall and 65% relative humidity across the period.

🌧️ Rain, humidity & wind in August

August averages 56 mm of rainfall in Peterborough, about average for rainfall compared with the rest of the year. The wettest August on record saw 118 mm (1992), and the driest just 22 mm (2021). Humidity sits around 65% and average wind speed is 0.5 m/s, with solar radiation averaging 5.1 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 2.2°C. Daytime highs moved from 26°C to 28.4°C and overnight lows from 14°C to 16°C over the same span.
August Weather in Peterborough, Year by Year
🔥 warmest❄️ coldest🌧️ wettest
YearAvg HighAvg TempAvg LowHottest DayColdest DayRainfallHumidityWindSolar
202528.2°C21.8°C15.3°C35.0°C7.7°C34 mm56%0.5 m/s5.2
202427.9°C21.8°C15.7°C33.7°C9.7°C39 mm62%0.4 m/s4.9
202326.9°C20.8°C14.6°C29.7°C9.1°C55 mm63%0.5 m/s4.8
202228.9°C22.6°C16.3°C33.6°C11.4°C64 mm62%0.5 m/s5.1
2021 🔥30.2°C24.2°C18.2°C34.5°C10.9°C22 mm62%0.4 m/s5.1
202028.2°C22.0°C15.8°C32.6°C10.0°C66 mm65%0.5 m/s5.1
201927.0°C20.9°C14.8°C31.1°C10.8°C54 mm65%0.5 m/s5.6
201828.8°C23.2°C17.5°C33.7°C10.5°C58 mm67%0.5 m/s4.9
201725.9°C20.1°C14.4°C31.2°C8.5°C43 mm66%0.5 m/s5
201630.4°C24.0°C17.5°C35.3°C10.7°C40 mm60%0.5 m/s5.5
201526.8°C21.0°C15.2°C33.0°C10.5°C55 mm66%0.5 m/s5
201426.2°C20.0°C13.9°C31.1°C8.9°C43 mm67%0.5 m/s4.9
201327.2°C20.9°C14.7°C33.0°C9.9°C43 mm63%0.4 m/s5.5
201227.9°C21.8°C15.6°C33.5°C10.0°C29 mm60%0.5 m/s5.2
201127.5°C21.7°C15.9°C31.4°C10.9°C52 mm63%0.5 m/s5.1
201027.7°C21.8°C15.9°C34.0°C9.8°C49 mm65%0.5 m/s5
200926.1°C20.5°C14.8°C32.9°C7.1°C75 mm69%0.5 m/s5.2
200824.7°C19.0°C13.4°C28.3°C8.1°C87 mm72%0.4 m/s5.4
200727.8°C21.5°C15.2°C34.8°C9.1°C39 mm61%0.5 m/s5.3
200627.4°C21.1°C14.8°C36.6°C8.0°C47 mm60%0.5 m/s5.5
200528.9°C22.5°C16.2°C34.9°C11.1°C52 mm61%0.5 m/s5.2
200423.1°C18.1°C13.1°C28.0°C8.4°C57 mm75%0.5 m/s4.8
200328.0°C22.0°C15.9°C32.8°C9.4°C43 mm66%0.4 m/s5.2
200227.5°C21.2°C14.9°C32.8°C10.6°C34 mm66%0.5 m/s5.7
200128.3°C22.1°C15.9°C35.3°C10.9°C61 mm63%0.5 m/s5.3
200025.0°C19.4°C13.7°C29.0°C6.8°C76 mm74%0.5 m/s5.1
199925.6°C19.8°C14.0°C30.9°C8.7°C56 mm64%0.5 m/s5
199827.0°C21.2°C15.4°C31.1°C8.4°C87 mm67%0.4 m/s5.3
199725.0°C19.0°C13.0°C30.4°C9.4°C78 mm66%0.5 m/s5
199627.5°C20.9°C14.3°C31.3°C10.0°C27 mm63%0.4 m/s5.4
199529.1°C22.3°C15.4°C34.4°C8.6°C58 mm62%0.5 m/s5.3
199425.2°C19.0°C12.8°C30.6°C8.2°C52 mm67%0.5 m/s5.2
199327.2°C21.1°C15.0°C32.5°C9.5°C65 mm67%0.4 m/s5.2
1992 🌧️24.0°C18.2°C12.5°C29.9°C8.3°C118 mm71%0.5 m/s4.9
199127.4°C21.2°C15.0°C33.8°C10.6°C41 mm65%0.5 m/s5.3
199027.1°C20.9°C14.6°C30.9°C10.8°C62 mm67%0.4 m/s5
198926.5°C20.3°C14.0°C33.2°C8.0°C52 mm64%0.5 m/s4.7
198827.7°C21.6°C15.5°C35.3°C9.2°C58 mm64%0.5 m/s4.7
198726.6°C20.3°C14.0°C33.1°C7.7°C47 mm58%0.5 m/s5
198624.0°C18.4°C12.8°C32.0°C4.7°C83 mm67%0.5 m/s5.1
198525.4°C19.4°C13.4°C32.7°C8.0°C74 mm66%0.5 m/s4.8
198427.2°C21.2°C15.2°C33.0°C7.5°C60 mm68%0.4 m/s5.2
198327.9°C21.5°C15.2°C33.0°C9.1°C65 mm65%0.4 m/s—
1982 ❄️24.0°C17.9°C11.9°C30.2°C4.4°C48 mm65%0.5 m/s—
198125.7°C20.0°C14.2°C29.3°C8.5°C94 mm69%0.4 m/s—

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

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Peterborough August Weather — FAQ

What is the average temperature in Peterborough in August?▼

The average high in August is around 26.9°C with lows near 14.8°C (mean 20.9°C), based on 45 years of NASA POWER data.

Does it rain a lot in Peterborough in August?▼

August averages 56 mm of rainfall in Peterborough, about average for rainfall. The wettest on record was 118 mm in 1992.

What was the hottest August on record in Peterborough?▼

The hottest August reached 36.6°C in 2006. The coldest dipped to 4.4°C in 1982.

Has August in Peterborough 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 2.2°C. Daytime highs moved from 26°C to 28.4°C and overnight lows from 14°C to 16°C over the same span.

Is August a good time to visit Peterborough?▼

August is one of the warmer months of the year in Peterborough and about average for rainfall, so plan for around 26.9°C daytime highs and 14.8°C at night.

Is August the coldest month in Peterborough?▼

Not quite — August is the 11th coolest month in Peterborough, averaging 20.9°C.

What should I pack for Peterborough in August?▼

For August in Peterborough, pack light layers you can adjust through the day, with typical highs of 26.9°C and lows of 14.8°C. Bring an umbrella or light rain jacket too.

Is Peterborough humid in August?▼

Relative humidity in August averages 65% — moderately humid.

How windy is Peterborough in August?▼

Average wind speed in August is 0.5 m/s. The windiest August on record averaged 0.5 m/s (1982).

Which August had the most rainfall in Peterborough?▼

The wettest August on record was 1992 with 118 mm. On average, August sees 56 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 Peterborough 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.