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Weather & Climate in Carlow/Mayo, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Carlow/Mayo has a cool climate with an average annual temperature of 45°F (7°C). Winters average 21°F in January while summers reach 68°F in July. The area gets 258 sunny days per year, above the national average. Annual precipitation totals 42.7 inches. The area receives 14.7 inches of snow annually. The city sits at an elevation of 919 feet.
Temperature
21°F Jan (-6°C)
68°F Jul (20°C)
| Annual Average | 44.9°F |
| 17% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 68°F (20°C) |
| Sunny Days | 258 days/yr |
Geography
| Elevation | 919 ft (280 m) |
| Area | 148.8 sq mi (385.3 km²) |
| Population Density | 7/sq mi |
| Coordinates | 43.7767°N, 81.6296°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M2.5.
| May 23, 2022 | 2 km NNW of Corunna, Canada | M2.5 | 118 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 2.7 m (9 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1855 | OWEN SOUND, LAKE HURON | Unknown | 2.7 m | — | 145 km |
| 1952 | LAKE HURON, MI | Avalanche | 1.5 m | — | 98 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 4.3 in | Coldest |
| February | 21°F (-6°C) | 3.1 in | |
| March | 30°F (-1°C) | 2.8 in | Driest |
| April | 41°F (5°C) | 2.9 in | |
| May | 54°F (12°C) | 3.4 in | |
| June | 63°F (17°C) | 3.0 in | |
| July | 68°F (20°C) | 2.9 in | Warmest |
| August | 67°F (19°C) | 3.7 in | |
| September | 60°F (16°C) | 4.2 in | |
| October | 49°F (10°C) | 3.8 in | |
| November | 38°F (3°C) | 4.3 in | |
| December | 27°F (-3°C) | 4.5 in | Wettest |
Carlow/Mayo has a seasonal temperature swing of 47°F / from 21°F in January to 68°F in July. Total annual precipitation is 42.7 inches, with December being the wettest month (4.5") and March the driest (2.8").