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Weather & Climate in Frontenac Islands, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Frontenac Islands has a cool climate with an average annual temperature of 45°F (7°C). Winters average 21°F in January while summers reach 69°F in July. The area gets 266 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 38.7 inches. The area receives 12.2 inches of snow annually. The city sits at an elevation of 269 feet.
Temperature
21°F Jan (-6°C)
69°F Jul (21°C)
| Annual Average | 45.4°F |
| 16% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 266 days/yr |
Geography
| Elevation | 269 ft (82 m) |
| Area | 68.3 sq mi (176.8 km²) |
| Population Density | 28/sq mi |
| Coordinates | 44.1535°N, 76.4628°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
18 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.6.
| Dec 25, 1998 | 23 km SE of Cobourg, Canada | M3.6 | 123 km | 18 km |
| Apr 23, 2023 | New York | M3.6 | 48 km | 9 km |
| Jun 29, 2024 | 14 km W of Ellisburg, New York | M3.3 | 49 km | 5 km |
| Jul 31, 1997 | 0 km WSW of Lyons Falls, New York | M3.2 | 106 km | 5 km |
| Nov 7, 2002 | 13 km SSW of Belleville, Canada | M3.0 | 78 km | 18 km |
| Oct 13, 1997 | 18 km NW of Cranberry Lake, New York | M3.0 | 121 km | 4 km |
| Jul 19, 2007 | 27 km S of Cobourg, Canada | M3.0 | 147 km | 5 km |
| Sep 4, 2004 | 3 km S of Massena, New York | M2.9 | 150 km | 4 km |
| Jul 14, 2021 | 8 km WNW of Massena, New York | M2.8 | 147 km | 7 km |
| Mar 20, 2008 | 12 km S of Osgoode, Canada | M2.8 | 119 km | 6 km |
| Mar 14, 2021 | 19 km SW of Winchester, Canada | M2.7 | 116 km | 10 km |
| Mar 17, 2004 | 3 km SSW of Massena, New York | M2.7 | 148 km | 8 km |
| Aug 11, 2007 | 4 km N of Kingston, Canada | M2.6 | 13 km | 4 km |
| Apr 14, 2023 | 1 km W of Adams Center, New York | M2.6 | 48 km | 6 km |
| Apr 11, 2007 | 6 km NNE of Sodus Point, New York | M2.6 | 101 km | 7 km |
| Oct 6, 2017 | 9 km SSE of Nepean, Canada | M2.5 | 138 km | 17 km |
| Mar 17, 2004 | 12 km SSW of Osgoode, Canada | M2.5 | 118 km | 18 km |
| May 10, 2022 | southern Ontario, Canada | M2.5 | 132 km | 11 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 3.3 in | Coldest |
| February | 22°F (-6°C) | 2.7 in | |
| March | 30°F (-1°C) | 2.6 in | Driest |
| April | 41°F (5°C) | 3.1 in | |
| May | 53°F (12°C) | 3.0 in | |
| June | 62°F (17°C) | 3.0 in | |
| July | 69°F (21°C) | 2.6 in | Warmest |
| August | 68°F (20°C) | 3.4 in | |
| September | 61°F (16°C) | 3.8 in | |
| October | 50°F (10°C) | 3.5 in | |
| November | 40°F (4°C) | 4.1 in | Wettest |
| December | 29°F (-2°C) | 3.6 in |
Frontenac Islands has a seasonal temperature swing of 48°F / from 21°F in January to 69°F in July. Total annual precipitation is 38.7 inches, with November being the wettest month (4.1") and March the driest (2.6").