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Weather & Climate in Summerville-Princeton-Southern Bay, NL
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Summerville-Princeton-Southern Bay has a cool climate with an average annual temperature of 40°F (4°C). Winters average 21°F in January while summers reach 60°F in July. The area gets 242 sunny days per year, above the national average. Annual precipitation totals 51.7 inches (wetter than the 38-inch national average). The area receives 26.4 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 213 feet.
Temperature
21°F Jan (-6°C)
60°F Jul (15°C)
| Annual Average | 39.8°F |
| 26% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 60°F (15°C) |
| Sunny Days | 242 days/yr |
Geography
| Elevation | 213 ft (65 m) |
| Area | 5.0 sq mi (12.9 km²) |
| Population Density | 54/sq mi |
| Coordinates | 48.4325°N, 53.5713°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 | 115 km | 18 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
5 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 2.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Ernesto | Category 1 | 75 mph | 261 km |
| 2021 | Larry | Category 1 | 81 mph | 46 km |
| 2014 | Gonzalo | Category 1 | 81 mph | 259 km |
| 2010 | Igor | Category 1 | 86 mph | 206 km |
| 1982 | Debby | Category 2 | 86 mph | 272 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 4.5 in | |
| February | 20°F (-7°C) | 4.1 in | Coldest |
| March | 27°F (-3°C) | 4.1 in | |
| April | 35°F (2°C) | 4.2 in | |
| May | 44°F (7°C) | 3.7 in | |
| June | 52°F (11°C) | 3.9 in | |
| July | 60°F (15°C) | 3.7 in | |
| August | 60°F (16°C) | 3.7 in | Warmest, Driest |
| September | 53°F (12°C) | 5.0 in | |
| October | 44°F (7°C) | 5.2 in | Wettest |
| November | 36°F (2°C) | 4.7 in | |
| December | 27°F (-3°C) | 4.9 in |
Summerville-Princeton-Southern Bay has a seasonal temperature swing of 40°F / from 20°F in February to 60°F in August. Total annual precipitation is 51.7 inches, with October being the wettest month (5.2") and August the driest (3.7").