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Weather & Climate in Harjavalta, Finland
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Harjavalta has a cool climate with an average annual temperature of 40°F (4°C). Winters average 22°F in January while summers reach 61°F in July. The area gets 292 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 24.0 inches (drier than the 38-inch national average). The area receives 8.5 inches of snow annually. The city sits at an elevation of 121 feet.
Temperature
22°F Jan (-6°C)
61°F Jul (16°C)
| Annual Average | 40.0°F |
| 26% below US avg | |
| January Average | 22°F (-6°C) |
| July Average | 61°F (16°C) |
| Sunny Days | 292 days/yr |
Geography
| Elevation | 121 ft (37 m) |
| Area | 66.8 sq mi (172.9 km²) |
| Population Density | 99/sq mi |
| Coordinates | 61.3167°N, 22.1333°W |
| Timezone | Europe/Helsinki |
Precipitation & Snow
Air Quality
Earthquake History
1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M2.7.
| May 24, 1995 | 8 km ENE of Nagu, Finland | M2.7 | 122 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-6°C) | 1.7 in | |
| February | 21°F (-6°C) | 1.2 in | Coldest, Driest |
| March | 28°F (-2°C) | 1.3 in | |
| April | 37°F (3°C) | 1.5 in | |
| May | 49°F (9°C) | 1.2 in | |
| June | 57°F (14°C) | 2.1 in | |
| July | 61°F (16°C) | 2.9 in | Warmest |
| August | 58°F (14°C) | 3.0 in | Wettest |
| September | 49°F (10°C) | 2.4 in | |
| October | 41°F (5°C) | 2.4 in | |
| November | 32°F (0°C) | 2.3 in | |
| December | 26°F (-4°C) | 1.9 in |
Harjavalta has a seasonal temperature swing of 40°F / from 21°F in February to 61°F in July. Total annual precipitation is 24.0 inches, with August being the wettest month (3.0") and February the driest (1.2").