Weather & Climate in Otonabee-South Monaghan, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Otonabee-South Monaghan has a cool climate with an average annual temperature of 44°F (6°C). Winters average 17°F in January while summers reach 68°F in July. Annual precipitation totals 35.2 inches. The area receives 10.0 inches of snow annually. The city sits at an elevation of 725 feet.
Temperature
17°F Jan (-9°C)
68°F Jul (20°C)
| Annual Average | 43.5°F |
| 19% below US avg | |
| January Average | 17°F (-9°C) |
| July Average | 68°F (20°C) |
Geography
| Elevation | 725 ft (221 m) |
| Area | 133.7 sq mi (346.2 km²) |
| Population Density | 53/sq mi |
| Coordinates | 44.2433°N, 78.2151°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
18 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.8.
| Nov 26, 1999 | 14 km ESE of Centennial Scarborough, Canada | M3.8 | 86 km | 13 km |
| Dec 25, 1998 | 23 km SE of Cobourg, Canada | M3.6 | 51 km | 18 km |
| May 24, 2000 | 4 km ENE of Centennial Scarborough, Canada | M3.1 | 86 km | 18 km |
| Nov 7, 2002 | 13 km SSW of Belleville, Canada | M3.0 | 66 km | 18 km |
| May 8, 2018 | 14 km SSE of Ajax, Canada | M3.0 | 82 km | 5 km |
| May 25, 1995 | 3 km NW of Amherst, New York | M3.0 | 147 km | 5 km |
| Aug 4, 2004 | 30 km SSW of Cobourg, Canada | M3.0 | 61 km | 5 km |
| Jul 19, 2007 | 27 km S of Cobourg, Canada | M3.0 | 59 km | 5 km |
| Mar 28, 2005 | 16 km NW of Virgil, Canada | M2.8 | 134 km | 7 km |
| Mar 8, 2008 | 5 km ENE of Clarence Center, New York | M2.7 | 138 km | 6 km |
| Dec 21, 2009 | 10 km NNE of Olcott, New York | M2.7 | 98 km | 8 km |
| Aug 11, 2007 | 4 km N of Kingston, Canada | M2.6 | 138 km | 4 km |
| Mar 29, 2020 | 11 km N of Lyndonville, New York | M2.6 | 92 km | 5 km |
| Apr 11, 2007 | 6 km NNE of Sodus Point, New York | M2.6 | 143 km | 7 km |
| Sep 20, 2009 | 20 km ESE of Oakville, Canada | M2.6 | 137 km | 4 km |
| Jul 11, 2017 | 11 km NNW of Barker, New York | M2.5 | 95 km | 5 km |
| May 17, 2010 | 19 km WNW of Gravenhurst, Canada | M2.5 | 137 km | 5 km |
| Feb 13, 2014 | 34 km N of Lyndonville, New York | M2.5 | 69 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 17°F (-9°C) | 2.7 in | Coldest |
| February | 19°F (-7°C) | 2.1 in | Driest |
| March | 29°F (-2°C) | 2.3 in | |
| April | 42°F (6°C) | 2.8 in | |
| May | 54°F (12°C) | 3.2 in | |
| June | 63°F (17°C) | 3.2 in | |
| July | 68°F (20°C) | 2.7 in | Warmest |
| August | 66°F (19°C) | 3.2 in | |
| September | 58°F (15°C) | 3.5 in | |
| October | 47°F (8°C) | 3.1 in | |
| November | 36°F (2°C) | 3.6 in | Wettest |
| December | 23°F (-5°C) | 2.9 in |
Otonabee-South Monaghan has a seasonal temperature swing of 51°F / from 17°F in January to 68°F in July. Total annual precipitation is 35.2 inches, with November being the wettest month (3.6") and February the driest (2.1").