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Weather & Climate in Seinäjoki, Finland
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Seinäjoki has a cool climate with an average annual temperature of 38°F (3°C). Winters average 19°F in January while summers reach 60°F in July. The area gets 297 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 21.3 inches (drier than the 38-inch national average). The area receives 6.9 inches of snow annually. The city sits at an elevation of 164 feet.
Temperature
19°F Jan (-7°C)
60°F Jul (16°C)
| Annual Average | 38.1°F |
| 29% below US avg | |
| January Average | 19°F (-7°C) |
| July Average | 60°F (16°C) |
| Sunny Days | 297 days/yr |
Geography
| Elevation | 164 ft (50 m) |
| Area | 1,164.1 sq mi (3,014.9 km²) |
| Population Density | 57/sq mi |
| Coordinates | 62.7945°N, 22.8282°W |
| Timezone | Europe/Helsinki |
Precipitation & Snow
Air Quality
Earthquake History
1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.8.
| May 22, 1992 | 33 km E of Sävar, Sweden | M3.8 | 148 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 19°F (-7°C) | 1.3 in | |
| February | 18°F (-8°C) | 0.9 in | Coldest, Driest |
| March | 26°F (-3°C) | 1.1 in | |
| April | 36°F (2°C) | 1.1 in | |
| May | 47°F (9°C) | 1.3 in | |
| June | 57°F (14°C) | 2.1 in | |
| July | 60°F (16°C) | 3.1 in | Warmest, Wettest |
| August | 57°F (14°C) | 2.6 in | |
| September | 47°F (9°C) | 2.2 in | |
| October | 39°F (4°C) | 1.9 in | |
| November | 29°F (-2°C) | 2.0 in | |
| December | 22°F (-5°C) | 1.5 in |
Seinäjoki has a seasonal temperature swing of 42°F / from 18°F in February to 60°F in July. Total annual precipitation is 21.3 inches, with July being the wettest month (3.1") and February the driest (0.9").