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. 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) |
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").