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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. The area gets 271 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 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) |
| Sunny Days | 271 days/yr |
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").