Env. Canada, the European and the American model agree on a high near 13° in Petawawa today. Tomorrow: partly cloudy, around 17°, with a 28% chance of rain.
Petawawa swings 40°C across the year, from 24°C highs in July to -16°C lows in February, and September is usually the wettest month in a year that brings about 816 mm of precipitation. Over 10 years of recorded weather it averages 60 days a year at 25°C or above, 11 of them at 30°C or above, 160 frost nights, and rain on 137 days.
Warmest month
July
24°C average high
Coldest month
February
-16°C average low
Wettest month
September
816 mm a year
Comfortable
4 months
May, June, July and August
Residents
17,000
share this forecast
Most accurate here
European
89/100 CheckWeather Score
Warm days
60 days
a year at 25°C or above
Frost nights
160 nights
a year below 0°C
Rain days
137 days
a year with 1 mm or more
Day counts are from the ERA5 reanalysis for Petawawa’s grid square, 2016 to 2025, counted the same way for every city so the numbers compare. A reanalysis square is an area, not a weather station, so it is good for counting days and not for a single day’s record.
The weather map: all three models at once
Env. Canada, European, American side by side around Petawawa and nearby towns.Live rain radar →
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Petawawa hourly forecast: next 14 hours
consensus of the three models
Rain in the next 24 hours, model by model
each model's own hourly precipitation, side by side
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Petawawa 10-day forecast, out to 14 days
where the models agree, and where they split
Today
Clear
13°0°
models agree
Tomorrow
Partly cloudy
17°1°
models agree
Mon
Cloudy
12°3°
models agree
Tue
Mostly clear
6°-1°
±2°
Wed
Cloudy
8°-1°
models agree
Thu
Drizzle
16°3°
models agree
Fri
Mostly clear
12°5°
models agree
Sat
Heavy drizzle
11°4°
±4°
Sun
Light drizzle
15°5°
±6°
Mon
Heavy drizzle
13°6°
models agree
Tue
Light drizzle
10°3°
±4°
Wed
Light drizzle
6°0°
±3°
Thu
Light drizzle
7°1°
models agree
Fri
Light drizzle
5°0°
models agree
Petawawa, Ontario is at its warmest in Jul (average highs near 24°C) and coldest in Feb (lows around -16°C), with roughly 816 mm of precipitation across the year. Below, compare what Env. Canada, European, American forecast for Petawawa right now, and see exactly where they disagree.
average daytime high and overnight low across a typical year (1991-2020)
Jan
-7°
-15°
Feb
-4°
-16°
Mar
1°
-9°
Apr
10°
-2°
May
18°
6°
Jun
22°
12°
Jul
24°
14°
Aug
23°
14°
Sep
19°
9°
Oct
12°
3°
Nov
5°
-3°
Dec
-4°
-10°
Source: 1991-2020 averages, ERA5 for this place adjusted with NASA POWER.
How Petawawa's weather has changed since 1995
30 years of daily data, 1995-2024, shown as change
+0.8°C
Around Petawawa, the difference between 1995-2004 and 2015-2024 is +0.8°C, within the normal swing from year to year.
1995each stripe is one year2024
cooler than averagearound averagewarmer than average
Days above 30°C
6 more days a year
2015-2024 against 1995-2004. Within the normal year-to-year swing
Frost nights
4 fewer nights a year
2015-2024 against 1995-2004, below 0°C. Within the normal year-to-year swing
Average wind
−3%
2015-2024 against 1995-2004. Within the normal year-to-year swing
Bars: each year against the area's 30-year average. Dashed lines: the average of the first and the last ten years.
See the numbers year by year
Year
Temp vs average
Days >30°C vs avg
Frost nights vs avg
Wind vs avg
1995
−0.6°C
+0
+1
+4%
1996
−0.6°C
−2
+13
+4%
1997
−1.0°C
+2
+13
+4%
1998
+1.8°C
+3
−17
−0%
1999
+0.7°C
+6
−4
+4%
2000
−0.9°C
−8
+2
+4%
2001
+0.3°C
−3
−2
−0%
2002
−0.3°C
−5
+20
−0%
2003
−1.4°C
−8
+7
−0%
2004
−1.3°C
−8
+1
−0%
2005
+0.6°C
+8
−3
−0%
2006
+0.6°C
−1
−3
−0%
2007
−0.4°C
−3
−4
+4%
2008
−0.6°C
−7
−1
−0%
2009
−0.9°C
−4
+4
−5%
2010
+0.8°C
+2
−7
−0%
2011
+0.2°C
−7
−6
−5%
2012
+1.1°C
+5
−7
−0%
2013
−0.4°C
−1
+1
−0%
2014
−1.3°C
−7
+3
−0%
2015
−0.2°C
−2
−2
−0%
2016
+0.2°C
+1
+6
−0%
2017
−0.2°C
−8
+1
−0%
2018
−0.4°C
+0
+18
−0%
2019
−1.4°C
−2
+4
−0%
2020
+0.2°C
+5
+16
−0%
2021
+1.3°C
+3
−21
−5%
2022
+0.5°C
+9
−3
+4%
2023
+1.8°C
+8
−7
−5%
2024
+2.7°C
+21
−20
−0%
Source: NASA POWER daily data from the MERRA-2 reanalysis, 1995-2024. Each value describes a grid square of about 50 km around Petawawa, not a weather station, and a square that takes in sea or a large lake runs milder than the city itself. That is why this section shows change against the square's own 30-year average rather than counts you could compare with a local station. Rain and snow are left out because their long-term record in this dataset is not consistent over time. "Within the normal year-to-year swing" means the change is smaller than the usual differences between single years.
Which forecast is most accurate in Petawawa?
CheckWeather Score, graded against the weather that actually happened
Provider
CheckWeather-score
Temp
Wind
Rain
Run by
European ★ Best
89
/100rank #1
90±0.6°C
97±1.7 km/h
8290% hit
ECMWF - European Centre for Medium-Range Weather ForecastsReading, United Kingdom
EC
Env. Canada
86
/100rank #2
88±0.7°C
95±2.6 km/h
7687% hit
Environment and Climate Change CanadaDorval, Québec, Canada
American
85
/100rank #3
88±0.7°C
93±3.5 km/h
7687% hit
NOAA / NCEP (United States)College Park, Maryland, USA
The accuracy above is the measured record. This is your opinion: which forecast service do you trust most in Canada? Give each 1 to 5 stars.
Env. CanadaGEM model
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EuropeanECMWF
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AmericanNOAA GFS
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One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.
Where the models disagree
temperature and rain, judged separately
Day
Temperature
Rain
Today
±1°12° to 14°
models agree0% to 0% chance
Tomorrow
±1°17° to 18°
±28%0% to 28% chance
Mon
±1°11° to 13°
±61%0% to 61% chance
Tue
±2°5° to 7°
models agree0% to 0% chance
Wed
±2°7° to 9°
±9%1% to 10% chance
The models often agree on temperature and still split on rain, and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.
Sunrise and sunset in Petawawa
today, local time
Sunrise
07:38
Sunset
18:07
Daylight
10h 29m
Common questions
What's the weather in Petawawa today?
Saturday, October 24: Env. Canada, the European and the American model agree on a high near 13° in Petawawa today. Tomorrow: partly cloudy, around 17°, with a 28% chance of rain. The forecast on this page refreshes live.
Will it rain in Petawawa today or tomorrow?
The models split on rain in Petawawa on Sunday, October 25: Env. Canada 0%, European 14%, American 28%. When they disagree like this, treat any single app's answer with caution. On Saturday, October 24 the highest chance of rain from any model is 0%. The hourly strip and the model-by-model rain panel above update live.
Which forecast is most accurate for Petawawa?
Over the last 30 days, the European model has been the most accurate for Petawawa (CheckWeather Score 89/100), ahead of the Env. Canada at 86. We grade every model against the recorded weather. See the CA accuracy scoreboard for the full method.
What is the warmest month in Petawawa?
July is typically the warmest month in Petawawa, with average highs around 24°C.
How cold does Petawawa get?
The coldest month in Petawawa is February, when overnight lows average about -16°C.
How much rain does Petawawa get?
Petawawa sees roughly 816 mm of precipitation a year, with September usually the wettest month.
Is Petawawa getting warmer?
Not clearly. In NASA's reanalysis for the area around Petawawa, the difference between 1995-2004 and 2015-2024 is 0.8°C, within the normal swing from year to year.
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