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The average temperature in Kotka over the whole year is 7°C. July is the hottest month, with highs of about 20°C; January is the coldest, with lows of about -4°C. The rainy (wet) season in Kotka runs from November to March, peaking in January with a 27% chance of rain on a given day. The dry season is April to October; June is the driest month, at 12%. Winds in Kotka are highest in November, averaging 6.1 m/s (22 km/h), and lightest in July, at 4.2 m/s (15 km/h). The prevailing wind is from the SW. The clearest skies in Kotka come in June, when the sky is typically 44% covered; December is the cloudiest month, at 87%.
| Month | High | Low | Feels like | Chance of rain | Cloud | Wind | Being outside | Sun | Walking |
|---|---|---|---|---|---|---|---|---|---|
| January | -4°C | -4°C | -10°C | 27% | 83% | 6.0 m/s | 0 | 0 | 0 |
| February | -3°C | -4°C | -9°C | 24% | 78% | 5.6 m/s | 0 | 0 | 0 |
| March | 1°C | -2°C | -6°C | 20% | 67% | 5.1 m/s | 0 | 0 | 0 |
| April | 6°C | 2°C | -0°C | 16% | 57% | 4.8 m/s | 0 | 0 | 9 |
| May | 12°C | 8°C | 7°C | 13% | 49% | 4.4 m/s | 12 | 0 | 50 |
| June | 18°C | 13°C | 14°C | 12% | 44% | 4.5 m/s | 44 | 5 | 76 |
| July | 20°C | 16°C | 18°C | 12% | 46% | 4.2 m/s | 66 | 14 | 71 |
| August | 19°C | 15°C | 17°C | 13% | 51% | 4.6 m/s | 68 | 4 | 82 |
| September | 15°C | 11°C | 11°C | 14% | 59% | 5.0 m/s | 23 | 0 | 71 |
| October | 8°C | 7°C | 3°C | 18% | 74% | 5.8 m/s | 0 | 0 | 26 |
| November | 3°C | 2°C | -3°C | 23% | 85% | 6.1 m/s | 0 | 0 | 3 |
| December | -1°C | -1°C | -7°C | 23% | 87% | 5.9 m/s | 0 | 0 | 0 |
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Year round, Kotka has days of about -4°C at their warmest in January, its coolest month, and 20°C in July, its warmest; the coolest hours of the day run from -4°C to 16°C through the year, and the average temperature over the year is 7°C around the clock. Rain is most likely around January and least likely around June. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Winter in Kotka has typical daily highs of about -2°C and lows of about -3°C, with a 25% chance of rain on a given day.
Spring in Kotka has typical daily highs of about 6°C and lows of about 2°C, with a 16% chance of rain on a given day.
Summer in Kotka has typical daily highs of about 19°C and lows of about 15°C, with a 12% chance of rain on a given day.
Autumn in Kotka has typical daily highs of about 8°C and lows of about 7°C, with a 18% chance of rain on a given day.
The rainy (wet) season in Kotka runs from November to March, peaking in January with a 27% chance of rain on a given day. The dry season is April to October; June is the driest month, at 12%.
Winds in Kotka are highest in November, averaging 6.1 m/s (22 km/h), and lightest in July, at 4.2 m/s (15 km/h). The prevailing wind is from the SW.
The average temperature in Kotka over the whole year is 7°C. July is the hottest month, with highs of about 20°C; January is the coldest, with lows of about -4°C.