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Weather & Climate in Seguin, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Seguin has a cool climate with an average annual temperature of 42°F (6°C). Winters average 15°F in January while summers reach 66°F in July. The area gets 259 sunny days per year, above the national average. Annual precipitation totals 42.5 inches. The area receives 19.2 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 869 feet.
Temperature
15°F Jan (-9°C)
66°F Jul (19°C)
| Annual Average | 42.0°F |
| 22% below US avg | |
| January Average | 15°F (-9°C) |
| July Average | 66°F (19°C) |
| Sunny Days | 259 days/yr |
Geography
| Elevation | 869 ft (265 m) |
| Area | 226.6 sq mi (587.0 km²) |
| Population Density | 23/sq mi |
| Coordinates | 45.3211°N, 79.8529°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
3 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.5.
| Oct 10, 1995 | southern Quebec, Canada | M3.5 | 148 km | 18 km |
| Jul 29, 2012 | 17 km SSW of Parry Sound, Canada | M2.5 | 24 km | 5 km |
| May 17, 2010 | 19 km WNW of Gravenhurst, Canada | M2.5 | 41 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 2.7 m (9 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1855 | OWEN SOUND, LAKE HURON | Unknown | 2.7 m | - | 97 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 15°F (-9°C) | 4.2 in | Coldest |
| February | 17°F (-9°C) | 3.0 in | |
| March | 26°F (-3°C) | 2.9 in | |
| April | 40°F (4°C) | 2.8 in | |
| May | 52°F (11°C) | 3.4 in | |
| June | 61°F (16°C) | 2.8 in | |
| July | 66°F (19°C) | 2.6 in | Warmest, Driest |
| August | 65°F (19°C) | 3.3 in | |
| September | 58°F (14°C) | 4.1 in | |
| October | 47°F (8°C) | 4.3 in | |
| November | 35°F (2°C) | 4.3 in | |
| December | 22°F (-6°C) | 4.8 in | Wettest |
Seguin has a seasonal temperature swing of 51°F / from 15°F in January to 66°F in July. Total annual precipitation is 42.5 inches, with December being the wettest month (4.8") and July the driest (2.6").