Seinäjoki Climate by Month
Seinäjoki, South Ostrobothnia, Finland
Mild summers and freezing winters, with rain spread through the year.
Seinäjoki has mild summers and freezing winters, with rain spread through the year. Expect highs of 72°F (22°C) in July and 28°F (-2°C) in February, with the coldest nights (February) near 13°F (-11°C). About 21 in (532 mm) of rain falls in a typical year, with no clear rainy season. The air is humid, averaging 80% relative humidity.
- Warmest month
- 72°F(22°C)
- Average high, July
- Coldest nights
- 13°F(-11°C)
- Average low, February
- Rain per year
- 21 in(532 mm)
- No clear rainy season
- Humidity
- 80%
- Sunniest: June
Best and worst months in Seinäjoki
Best for weatherJune and July are the best time for weather in Seinäjoki: highs near 70°F (21°C) and about 2.7 in (69 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 28°F (-2°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in July.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Seinäjoki weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 28°F(-2°C) | 15°F(-9°C) | 1.3 in(34 mm) | 100% | 0.2 |
| FebFebruary | 28°F(-2°C) | 13°F(-11°C) | 1.0 in(25 mm) | 80% | 0.7 |
| MarMarch | 35°F(2°C) | 19°F(-7°C) | 1.0 in(25 mm) | 80% | 2.1 |
| AprApril | 47°F(8°C) | 29°F(-2°C) | 1.0 in(25 mm) | 65% | 3.5 |
| MayMay | 59°F(15°C) | 37°F(3°C) | 1.5 in(39 mm) | 62% | 4.9 |
| JunJuneBest | 68°F(20°C) | 46°F(8°C) | 2.3 in(59 mm) | 63% | 5.4 |
| JulJulyBest | 72°F(22°C) | 51°F(11°C) | 3.1 in(78 mm) | 75% | 5.1 |
| AugAugust | 69°F(20°C) | 48°F(9°C) | 2.6 in(66 mm) | 78% | 3.9 |
| SepSeptember | 58°F(15°C) | 41°F(5°C) | 1.8 in(45 mm) | 83% | 2.3 |
| OctOctober | 45°F(7°C) | 34°F(1°C) | 1.9 in(49 mm) | 85% | 0.9 |
| NovNovember | 36°F(2°C) | 28°F(-2°C) | 1.9 in(48 mm) | 98% | 0.2 |
| DecDecember | 31°F(0°C) | 20°F(-7°C) | 1.5 in(39 mm) | 85% | 0.1 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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