Weather & Climate in Harley, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Harley experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 21°F in January while summers reach 69°F in July. Annual precipitation totals 36.1 inches. The area receives 9.8 inches of snow annually. The city sits at an elevation of 873 feet.
Temperature
21°F Jan (-6°C)
69°F Jul (21°C)
| Annual Average | 45.7°F |
| 15% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 69°F (21°C) |
Geography
| Elevation | 873 ft (266 m) |
| Area | 35.7 sq mi (92.3 km²) |
| Population Density | 15/sq mi |
| Coordinates | 43.0641°N, 80.4818°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
17 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.9.
| Jan 26, 2001 | 8 km NNW of Edgewood, Ohio | M3.9 | 128 km | 5 km |
| Feb 6, 2023 | 1 km NE of West Seneca, New York | M3.8 | 140 km | 6 km |
| Nov 26, 1999 | 14 km ESE of Centennial Scarborough, Canada | M3.8 | 140 km | 13 km |
| Jun 20, 2006 | 9 km WNW of North Perry, Ohio | M3.5 | 149 km | 5 km |
| Mar 15, 1992 | 15 km NW of North Perry, Ohio | M3.5 | 143 km | 5 km |
| Jun 3, 2001 | 3 km N of Edgewood, Ohio | M3.4 | 131 km | 5 km |
| May 24, 2000 | 4 km ENE of Centennial Scarborough, Canada | M3.1 | 139 km | 18 km |
| May 8, 2018 | 14 km SSE of Ajax, Canada | M3.0 | 145 km | 5 km |
| May 25, 1995 | 3 km NW of Amherst, New York | M3.0 | 134 km | 5 km |
| Jun 16, 2004 | 11 km NNW of Angola on the Lake, New York | M2.9 | 119 km | 6 km |
| Feb 23, 1995 | 3 km W of Ashtabula, Ohio | M2.9 | 136 km | 5 km |
| Mar 28, 2005 | 16 km NW of Virgil, Canada | M2.8 | 101 km | 7 km |
| Jan 20, 2001 | 0 km NNW of Edgewood, Ohio | M2.6 | 134 km | 5 km |
| Feb 14, 2009 | 4 km WSW of Geneva-on-the-Lake, Ohio | M2.6 | 143 km | 5 km |
| Sep 20, 2009 | 20 km ESE of Oakville, Canada | M2.6 | 92 km | 4 km |
| Jul 17, 2003 | 1 km SE of Edgewood, Ohio | M2.5 | 136 km | 3 km |
| Dec 17, 1990 | 5 km SSE of Middleboro, Pennsylvania | M2.5 | 127 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 |
| 1823 | LAKE ERIE | Unknown | 2.7 m | - | 96 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 2.4 in | Coldest |
| February | 22°F (-6°C) | 2.0 in | Driest |
| March | 31°F (-0°C) | 2.5 in | |
| April | 43°F (6°C) | 3.1 in | |
| May | 55°F (13°C) | 3.2 in | |
| June | 64°F (18°C) | 3.1 in | |
| July | 69°F (21°C) | 3.6 in | Warmest, Wettest |
| August | 68°F (20°C) | 3.3 in | |
| September | 60°F (16°C) | 3.4 in | |
| October | 49°F (9°C) | 3.0 in | |
| November | 38°F (4°C) | 3.5 in | |
| December | 27°F (-3°C) | 2.9 in |
Harley has a seasonal temperature swing of 48°F / from 21°F in January to 69°F in July. Total annual precipitation is 36.1 inches, with July being the wettest month (3.6") and February the driest (2.0").