Weather & Climate in South Frontenac, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
South Frontenac has a cool climate with an average annual temperature of 43°F (6°C). Winters average 15°F in January while summers reach 68°F in July. Annual precipitation totals 37.6 inches. The area receives 11.0 inches of snow annually. The city sits at an elevation of 568 feet.
Temperature
15°F Jan (-9°C)
68°F Jul (20°C)
| Annual Average | 43.3°F |
| 20% below US avg | |
| January Average | 15°F (-9°C) |
| July Average | 68°F (20°C) |
Geography
| Elevation | 568 ft (173 m) |
| Area | 366.0 sq mi (948.0 km²) |
| Population Density | 55/sq mi |
| Coordinates | 44.5404°N, 76.4815°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
38 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.1.
| May 17, 2013 | 20 km NNE of Shawville, Canada | M5.1 | 136 km | 13 km |
| May 17, 2013 | 20 km NNE of Shawville, Canada | M3.6 | 136 km | 11 km |
| Apr 23, 2023 | New York | M3.6 | 84 km | 9 km |
| Dec 25, 1998 | 23 km SE of Cobourg, Canada | M3.6 | 140 km | 18 km |
| Oct 20, 2013 | 34 km SSW of Petawawa, Canada | M3.6 | 141 km | 18 km |
| May 28, 2002 | 11 km WNW of Shawville, Canada | M3.4 | 122 km | 18 km |
| Jun 29, 2024 | 14 km W of Ellisburg, New York | M3.3 | 92 km | 5 km |
| Jun 11, 2008 | 6 km NNE of Buckingham, Canada | M3.3 | 149 km | 18 km |
| Jul 31, 1997 | 0 km WSW of Lyons Falls, New York | M3.2 | 135 km | 5 km |
| Sep 9, 2015 | 20 km NNE of Shawville, Canada | M3.2 | 137 km | 10 km |
| May 8, 2009 | 9 km E of Constance Bay, Canada | M3.1 | 114 km | 21 km |
| Jun 30, 2013 | 19 km NNE of Shawville, Canada | M3.1 | 135 km | 14 km |
| May 17, 2013 | 21 km NNE of Shawville, Canada | M3.1 | 137 km | 18 km |
| Feb 24, 2002 | 7 km WSW of Casselman, Canada | M3.1 | 133 km | 18 km |
| Nov 7, 2002 | 13 km SSW of Belleville, Canada | M3.0 | 93 km | 18 km |
| Oct 13, 1997 | 18 km NW of Cranberry Lake, New York | M3.0 | 122 km | 4 km |
| Sep 4, 2004 | 3 km S of Massena, New York | M2.9 | 132 km | 4 km |
| Jul 21, 2011 | 27 km NW of Wakefield, Canada | M2.9 | 143 km | 15 km |
| Mar 7, 2008 | 7 km WSW of Casselman, Canada | M2.9 | 133 km | 7 km |
| May 30, 2013 | 20 km NNE of Shawville, Canada | M2.9 | 137 km | 13 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 15°F (-9°C) | 3.0 in | Coldest |
| February | 17°F (-8°C) | 2.4 in | Driest |
| March | 27°F (-3°C) | 2.6 in | |
| April | 41°F (5°C) | 2.9 in | |
| May | 54°F (12°C) | 3.3 in | |
| June | 63°F (17°C) | 3.2 in | |
| July | 68°F (20°C) | 2.8 in | Warmest |
| August | 67°F (20°C) | 3.4 in | |
| September | 59°F (15°C) | 4.0 in | Wettest |
| October | 48°F (9°C) | 3.3 in | |
| November | 37°F (3°C) | 3.7 in | |
| December | 24°F (-5°C) | 3.0 in |
South Frontenac has a seasonal temperature swing of 53°F / from 15°F in January to 68°F in July. Total annual precipitation is 37.6 inches, with September being the wettest month (4.0") and February the driest (2.4").