Peterborough Weather in July (1981–2025)

📍 44.30°N, 78.32°W •
📊

July at a Glance in Peterborough

(1981–2025)
Avg High
🔥
27.8°C
Avg Low
❄️
15.4°C
Avg Temp
🌡️
21.6°C
Avg Rain
🌧️
56 mm
Avg Humidity
💧
64%
Avg Wind
🌬️
0.5 m/s
Avg Solar
☀️
6
kWh/m²/day
vs Annual
📈
+14.7°C
temp difference
🌡️Warm afternoons🌤️Cool mornings☀️Very sunny🌦️Some rain🍃Light winds😊Comfortable humidity

Peterborough July Weather Overview

July is one of the warmer months of the year in Peterborough, with average highs near 27.8°C and lows around 15.4°C (mean 21.6°C). It is about average for rainfall, averaging 56 mm of rainfall and 64% relative humidity across the period.

Peterborough July Temperature History (1981–2025)

Range

July is one of the warmer months of the year in Peterborough. Across 45 years of records, the warmest July in Peterborough was 2020 — when the month averaged 25.4°C — while the coldest was 1992 at 18.3°C. Typical July days reach 27.8°C with nights near 15.4°C. The long-term trend is warming, about 0.5°C per decade.

1981–1985 vs 2021–2025

Avg Temp20.8°C→22.7°C+1.9°C
Max Temp27.1°C→29.1°C+2°C
Min Temp14.5°C→16.3°C+1.8°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

18.0°C–20.0°C8 yr (18%)
20.0°C–22.0°C18 yr (40%)
22.0°C–24.0°C16 yr (36%)
24.0°C–26.0°C3 yr (7%)

Peterborough July Rainfall History (1981–2025)

Range

July is about average for rainfall in Peterborough, averaging 56 mm of rainfall. The wettest July on record was 2004 with 171 mm, while the driest was 2025 at 23 mm.

Peterborough July Humidity History (1981–2025)

Range

Relative humidity in Peterborough during July averages 64%. The most humid July was 2004 at 82%, and the least humid was 2012 at 54%.

Peterborough July Solar History (1981–2025)

Range

July receives about 6 kWh/m²/day of solar energy in Peterborough. The sunniest July was 1989 at 6.7 kWh/m²/day, and the cloudiest was 2021 at 5.

Peterborough July Wind History (1981–2025)

Range

Average wind speed in Peterborough during July is 0.5 m/s. The windiest Julys were 2019, 2020 and 2022, among others at 0.5 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.4 m/s.

What July Feels Like in Peterborough

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

How July Ranks in Peterborough

🔥1st warmest month of the year
🌧️6th wettest month of the year
☀️1st sunniest month of the year

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

Explore Peterborough Weather by Month

Peterborough July Averages by Decade

Metric1980s1990s2000s2010s2020sChange
Avg Temp21.6°C20.8°C20.5°C22.7°C23.2°C+1.6°C
Avg High28.0°C26.9°C26.1°C29.1°C29.6°C+1.6°C
Avg Low15.2°C14.7°C14.8°C16.3°C16.8°C+1.6°C
Avg Rain46 mm59 mm81 mm44 mm44 mm-1 mm

Extreme July Records in Peterborough

🔥Warmest July37.6°C2005
🧊Coldest July6.6°C2001
🌧️Wettest July171 mm2004
🏜️Driest July23 mm2025
🌬️Windiest July0.5 m/s1981

Key Insights for July

✅

July temperatures in Peterborough have risen by about 1.9°C between 1981–1985 and 2021–2025.

✅

July has ranged from a record low of 6.6°C (2001) to a record high of 37.6°C (2005).

✅

Rainfall in July is about average for rainfall, averaging 56 mm, with a wettest year of 171 mm.

Is July a Good Time to Visit Peterborough?

One of the best times to visit Peterborough

July is one of the best times to visit Peterborough. Expect days averaging 27.8°C and nights around 15.4°C (mean 21.6°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 July — In Depth

☀️ July climate overview

July is one of the warmer months of the year in Peterborough, with average highs near 27.8°C and lows around 15.4°C (mean 21.6°C). It is about average for rainfall, averaging 56 mm of rainfall and 64% relative humidity across the period.

🌧️ Rain, humidity & wind in July

July averages 56 mm of rainfall in Peterborough, about average for rainfall compared with the rest of the year. The wettest July on record saw 171 mm (2004), and the driest just 23 mm (2025). Humidity sits around 64% and average wind speed is 0.5 m/s, with solar radiation averaging 6 kWh/m²/day.

📈 How July has changed

Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.9°C. Daytime highs moved from 27.1°C to 29.1°C and overnight lows from 14.5°C to 16.3°C over the same span.
July Weather in Peterborough, Year by Year
🔥 warmest❄️ coldest🌧️ wettest
YearAvg HighAvg TempAvg LowHottest DayColdest DayRainfallHumidityWindSolar
202531.4°C24.4°C17.4°C35.6°C11.0°C23 mm56%0.4 m/s6.3
202429.4°C22.9°C16.5°C33.4°C9.6°C78 mm63%0.4 m/s6
202329.2°C22.8°C16.4°C34.4°C12.8°C51 mm60%0.4 m/s5.6
202228.3°C22.1°C15.8°C32.9°C11.2°C36 mm57%0.5 m/s6
202127.4°C21.4°C15.4°C32.8°C10.6°C48 mm65%0.4 m/s5
2020 🔥31.7°C25.4°C19.1°C36.0°C15.3°C30 mm59%0.5 m/s6.4
201930.1°C23.6°C17.2°C35.3°C12.3°C48 mm64%0.5 m/s6.5
201829.7°C23.4°C17.0°C35.6°C11.4°C33 mm59%0.5 m/s6.5
201727.1°C21.2°C15.3°C31.4°C12.3°C54 mm68%0.5 m/s5.6
201629.7°C23.3°C16.8°C34.1°C11.6°C31 mm57%0.5 m/s6.3
201528.7°C21.6°C14.6°C35.6°C9.3°C33 mm60%0.5 m/s6.6
201425.9°C19.9°C13.9°C31.3°C9.3°C75 mm64%0.5 m/s5.7
201329.1°C22.8°C16.4°C35.7°C10.8°C32 mm62%0.4 m/s5.9
201230.5°C23.9°C17.3°C35.4°C13.5°C34 mm54%0.4 m/s6.5
201131.1°C24.2°C17.4°C35.8°C11.3°C46 mm56%0.5 m/s6.6
201029.4°C23.4°C17.3°C35.3°C10.1°C53 mm63%0.5 m/s6.2
200923.9°C18.7°C13.4°C27.9°C9.7°C79 mm72%0.5 m/s5.4
200826.0°C20.5°C15.1°C30.4°C10.0°C102 mm72%0.5 m/s5.8
200726.4°C20.3°C14.3°C33.1°C8.6°C75 mm64%0.5 m/s5.9
200628.7°C22.7°C16.7°C33.9°C11.8°C73 mm66%0.5 m/s5.7
200530.3°C23.6°C16.9°C37.6°C10.8°C39 mm59%0.5 m/s6.2
2004 🌧️24.1°C19.2°C14.4°C30.4°C9.2°C171 mm82%0.4 m/s5.2
200326.8°C20.8°C14.7°C31.3°C11.0°C58 mm66%0.5 m/s5.8
200226.5°C20.9°C15.4°C31.3°C10.2°C73 mm74%0.5 m/s6.5
200125.2°C19.4°C13.5°C31.8°C6.6°C54 mm67%0.5 m/s6.2
200023.4°C18.4°C13.4°C27.7°C8.1°C86 mm77%0.4 m/s5.5
199928.6°C22.5°C16.4°C34.6°C10.7°C79 mm64%0.5 m/s6.3
199826.2°C20.5°C14.9°C33.4°C9.8°C54 mm66%0.5 m/s6.2
199726.7°C20.4°C14.0°C31.2°C9.2°C45 mm64%0.5 m/s6.3
199626.1°C19.9°C13.6°C31.9°C10.3°C37 mm62%0.5 m/s5.9
199528.4°C21.9°C15.4°C36.8°C10.0°C51 mm64%0.5 m/s5.5
199427.2°C21.2°C15.2°C31.6°C9.8°C48 mm68%0.5 m/s5.7
199327.2°C21.1°C15.1°C31.5°C10.0°C59 mm69%0.5 m/s6.1
1992 ❄️24.0°C18.3°C12.6°C27.0°C7.9°C90 mm69%0.5 m/s5.4
199127.5°C21.3°C15.0°C34.7°C10.8°C65 mm63%0.5 m/s6.2
199027.1°C21.0°C14.9°C34.1°C9.9°C61 mm65%0.5 m/s5.9
198929.1°C22.3°C15.5°C34.3°C10.3°C23 mm57%0.4 m/s6.7
198830.2°C23.5°C16.8°C37.1°C9.6°C64 mm59%0.4 m/s6.1
198729.8°C23.2°C16.6°C34.4°C10.2°C30 mm59%0.5 m/s6.2
198627.7°C21.4°C15.0°C34.0°C9.1°C49 mm64%0.5 m/s6
198525.9°C19.7°C13.6°C30.3°C9.6°C58 mm65%0.5 m/s6.1
198426.1°C20.0°C13.9°C32.5°C7.5°C58 mm66%0.5 m/s5.2
198328.9°C22.5°C16.1°C33.5°C9.9°C33 mm63%0.5 m/s—
198227.5°C20.8°C14.2°C32.4°C6.9°C33 mm64%0.5 m/s—
198127.0°C20.9°C14.8°C31.9°C9.4°C65 mm67%0.5 m/s—

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

Other Cities in Ontario

Peterborough July Weather — FAQ

What is the average temperature in Peterborough in July?▼

The average high in July is around 27.8°C with lows near 15.4°C (mean 21.6°C), based on 45 years of NASA POWER data.

Does it rain a lot in Peterborough in July?▼

July averages 56 mm of rainfall in Peterborough, about average for rainfall. The wettest on record was 171 mm in 2004.

What was the hottest July on record in Peterborough?▼

The hottest July reached 37.6°C in 2005. The coldest dipped to 6.6°C in 2001.

Has July in Peterborough gotten warmer over time?▼

Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average July temperatures have risen by about 1.9°C. Daytime highs moved from 27.1°C to 29.1°C and overnight lows from 14.5°C to 16.3°C over the same span.

Is July a good time to visit Peterborough?▼

July is one of the warmer months of the year in Peterborough and about average for rainfall, so plan for around 27.8°C daytime highs and 15.4°C at night.

Is July the coldest month in Peterborough?▼

Not quite — July is the 12th coolest month in Peterborough, averaging 21.6°C.

What should I pack for Peterborough in July?▼

For July in Peterborough, pack light layers you can adjust through the day, with typical highs of 27.8°C and lows of 15.4°C. Bring an umbrella or light rain jacket too.

Is Peterborough humid in July?▼

Relative humidity in July averages 64% — moderately humid.

How windy is Peterborough in July?▼

Average wind speed in July is 0.5 m/s. The windiest July on record averaged 0.5 m/s (1981).

Which July had the most rainfall in Peterborough?▼

The wettest July on record was 2004 with 171 mm. On average, July sees 56 mm.

Where does this July 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 July, 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 July specifically, along with year-by-year records and how the month has changed over the decades.