Weather & Climate in Mattawa, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Mattawa has a cool climate with an average annual temperature of 39°F (4°C). Winters average 9°F in January while summers reach 65°F in July. Annual precipitation totals 35.8 inches. The area receives 11.9 inches of snow annually. The city sits at an elevation of 535 feet.
Temperature
9°F Jan (-13°C)
65°F Jul (18°C)
| Annual Average | 38.8°F |
| 28% below US avg | |
| January Average | 9°F (-13°C) |
| July Average | 65°F (18°C) |
Geography
| Elevation | 535 ft (163 m) |
| Area | 77.3 sq mi (200.1 km²) |
| Population Density | 2/sq mi |
| Coordinates | 46.3168°N, 78.6996°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
11 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.7.
| Jan 1, 2000 | 17 km NNE of Notre-Dame-du-Lac, Canada | M4.7 | 66 km | 18 km |
| Mar 6, 1991 | 49 km NNW of Fort-Coulonge, Canada | M3.9 | 140 km | 18 km |
| Oct 20, 2013 | 34 km SSW of Petawawa, Canada | M3.6 | 124 km | 18 km |
| Oct 10, 1995 | southern Quebec, Canada | M3.5 | 13 km | 18 km |
| May 14, 2016 | 8 km NW of Petawawa, Canada | M3.5 | 111 km | 18 km |
| Mar 29, 2011 | 66 km NE of Deep River, Canada | M3.5 | 136 km | 18 km |
| May 2, 2015 | 12 km NE of Notre-Dame-du-Lac, Canada | M3.3 | 59 km | 18 km |
| Jul 4, 2005 | 45 km NNW of Fort-Coulonge, Canada | M3.3 | 140 km | 13 km |
| Oct 3, 2009 | 18 km NNE of Pembroke, Canada | M3.1 | 135 km | 18 km |
| Apr 1, 2020 | 3 km NE of Saint-Isidore, Canada | M2.9 | 134 km | 10 km |
| Jul 27, 2014 | 13 km SW of Pembroke, Canada | M2.9 | 128 km | 18 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 9°F (-13°C) | 2.2 in | Coldest |
| February | 11°F (-12°C) | 2.0 in | |
| March | 22°F (-5°C) | 1.9 in | Driest |
| April | 37°F (3°C) | 2.4 in | |
| May | 51°F (11°C) | 2.8 in | |
| June | 60°F (16°C) | 3.5 in | |
| July | 65°F (18°C) | 4.1 in | Warmest, Wettest |
| August | 63°F (17°C) | 3.9 in | |
| September | 55°F (13°C) | 4.0 in | |
| October | 44°F (7°C) | 3.3 in | |
| November | 32°F (-0°C) | 3.2 in | |
| December | 17°F (-8°C) | 2.6 in |
Mattawa has a seasonal temperature swing of 56°F / from 9°F in January to 65°F in July. Total annual precipitation is 35.8 inches, with July being the wettest month (4.1") and March the driest (1.9").