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Weather & Climate in Tervakoski, Finland
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Tervakoski has a cool climate with an average annual temperature of 39°F (4°C). Winters average 20°F in January while summers reach 61°F in July. The area gets 291 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 24.8 inches (drier than the 38-inch national average). The area receives 8.8 inches of snow annually. The city sits at an elevation of 276 feet.
Temperature
20°F Jan (-7°C)
61°F Jul (16°C)
| Annual Average | 39.4°F |
| 27% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 61°F (16°C) |
| Sunny Days | 291 days/yr |
Geography
| Elevation | 276 ft (84 m) |
| Area | 259.0 sq mi (670.8 km²) |
| Population Density | 18/sq mi |
| Coordinates | 60.8141°N, 24.6259°W |
| Timezone | Europe/Helsinki |
Precipitation & Snow
Air Quality
Earthquake History
2 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M2.7.
| May 12, 2005 | 28 km SE of Hanko, Finland | M2.7 | 145 km | 0 km |
| Mar 19, 2011 | Finland | M2.6 | 46 km | 3 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 20°F (-7°C) | 1.8 in | |
| February | 19°F (-7°C) | 1.3 in | Coldest, Driest |
| March | 27°F (-3°C) | 1.5 in | |
| April | 37°F (3°C) | 1.4 in | |
| May | 49°F (10°C) | 1.3 in | |
| June | 58°F (14°C) | 2.1 in | |
| July | 61°F (16°C) | 3.1 in | Warmest |
| August | 58°F (14°C) | 3.2 in | Wettest |
| September | 48°F (9°C) | 2.4 in | |
| October | 40°F (4°C) | 2.5 in | |
| November | 31°F (-1°C) | 2.3 in | |
| December | 24°F (-4°C) | 2.0 in |
Tervakoski has a seasonal temperature swing of 42°F / from 19°F in February to 61°F in July. Total annual precipitation is 24.8 inches, with August being the wettest month (3.2") and February the driest (1.3").