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Weather & Climate in Marystown, NL
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Marystown has a cool climate with an average annual temperature of 45°F (7°C). Winters average 33°F in January while summers reach 64°F in July. The area gets 178 sunny days per year. Annual precipitation totals 63.1 inches (wetter than the 38-inch national average). The area receives 75.5 inches of snow annually, making winter weather a significant factor for residents. The city sits at an elevation of 49 feet.
Temperature
33°F Jan (1°C)
64°F Jul (18°C)
| Annual Average | 44.6°F |
| 17% below US avg | |
| January Average | 33°F (1°C) |
| July Average | 64°F (18°C) |
| Sunny Days | 178 days/yr |
Geography
| Elevation | 49 ft (15 m) |
| Area | 24.0 sq mi (62.2 km²) |
| Population Density | 217/sq mi |
| Coordinates | 47.1666°N, 55.1483°W |
| Timezone | America/St_Johns |
Precipitation & Snow
Air Quality
Earthquake History
1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.3.
| Apr 29, 2009 | 28 km SW of Bay Roberts, Canada | M3.3 | 127 km | 18 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
9 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 2.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Ernesto | Category 1 | 86 mph | 216 km |
| 2021 | Larry | Category 1 | 81 mph | 26 km |
| 2014 | Gonzalo | Category 1 | 92 mph | 222 km |
| 2010 | Igor | Category 1 | 86 mph | 161 km |
| 2009 | Bill | Category 1 | 75 mph | 231 km |
| 2002 | Gustav | Category 1 | 75 mph | 264 km |
| 2001 | Erin | Category 1 | 75 mph | 274 km |
| 2000 | Michael | Category 1 | — | 196 km |
| 1982 | Debby | Category 2 | 104 mph | 243 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
1 tsunami recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1864 | SW AVALON PENINSULA, NEWFOUNDLAND | Earthquake | — | — | 133 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 33°F (1°C) | 5.0 in | |
| February | 23°F (-5°C) | 4.8 in | Coldest |
| March | 28°F (-2°C) | 4.5 in | |
| April | 36°F (2°C) | 4.7 in | |
| May | 44°F (7°C) | 4.6 in | |
| June | 52°F (11°C) | 4.4 in | |
| July | 64°F (18°C) | 4.1 in | Warmest |
| August | 61°F (16°C) | 3.9 in | Driest |
| September | 55°F (13°C) | 5.9 in | Wettest |
| October | 46°F (8°C) | 5.9 in | |
| November | 38°F (3°C) | 5.5 in | |
| December | 30°F (-1°C) | 5.1 in |
Marystown has a seasonal temperature swing of 41°F / from 23°F in February to 64°F in July. Total annual precipitation is 58.4 inches, with September being the wettest month (5.9") and August the driest (3.9").