Kotka Weather in May
With daytime temperatures of 14°C (57°F) and nighttime lows of 6°C (43°F), May in Kotka brings moderate temperatures during the day. Some rainfall is to be expected during the month.
Rainfall in Kotka in May
Expect around 10 days of rain based on historical data, with 47 mm (1.9 in) average. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.
Temperature in Kotka in May
In May, Kotka gets moderate temperatures, with highs of 14°C (57°F). Nights cool to around 6°C (43°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights drop to 6°C (43°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.If you prefer enjoying temperate temperatures and rain-free days, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Finland, check out our Kotka's climate page.
Kotka Temperature in May
Min Temperature
6°C (43°F)
Max Temperature
14°C (57°F)
Chance of Rain
34%
Precipitation
47 mm (1.9 in)
Rainy days
10 days
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Kotka typically rise from around 9°C (48°F) at the start of May to approximately 15°C (59°F) by the end. Nights are cold, with lows typically ranging from 3°C (37°F) to 9°C (48°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Kotka in May
Browse day-by-day weather records for Kotka spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Kotka historical weather extremes in May
Based on weather observations in Kotka between 1976 and 2026, these are the recorded extremes during May.
- The hottest May day on record in Kotka reached 28°C (82°F) (May 19, 2026).
- The coldest May day was on May 1, 1996, with a maximum of 2°C (36°F).
- Kotka registered its coldest May night on May 2, 1996, with temperatures dropping to -4°C (25°F).
- The heaviest May precipitation occurred on May 16, 2003, when 20 mm (0.8 in) of precipitation fell.
Best Places in Finland in May
Find out more about the weather in Finland and which places have the best travel conditions in this month. See all of Finland in May →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in Kotka in May
The weather can be unpredictable in May, so pack clothes you can easily mix and match. You could bring jeans, other long pants, and a few t-shirts. A light jacket or light sweater will be pleasant for the cooler moments. Rain is likely on several days, so bring a good rain jacket.What To Do in Kotka in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Finland, check out our Kotka's climate page.
See the full Kotka climate overview or explore weather in Finland.
