Seinäjoki Weather in May
May in Seinäjoki brings moderate temperatures, with daytime highs of 16°C (61°F) and nights around 4°C (39°F). Expect around 55 mm (2.2 in) of rainfall during the month.
Rainfall in Seinäjoki in May
Analyzing past climate data, one can expect approximately 12 days of rain, averaging 55 mm (2.2 in). A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Seinäjoki in May
Daytime temperatures in Seinäjoki reach 16°C (61°F) in May, dropping to 4°C (39°F) at night. A light jacket or extra layer can be useful, especially outside the warmest hours of the day. At 4°C (39°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in Seinäjoki in May
With approximately 278 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.Should you favor a climate that's both dry and comfortably warm, June, July and August typically offer the most agreeable 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 Seinäjoki's climate page.
Seinäjoki Temperature in May
Min Temperature
4°C (39°F)
Max Temperature
16°C (61°F)
Chance of Rain
39%
Precipitation
55 mm (2.2 in)
Rainy days
12 days
Sunshine
278 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Seinäjoki typically rise from around 11°C (52°F) at the start of May to approximately 16°C (61°F) by the end. Nights are cold, with lows typically ranging from 0°C (32°F) to 6°C (43°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 Seinäjoki in May
Browse day-by-day weather records for Seinäjoki spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Seinäjoki historical weather extremes in May
Based on weather observations in Seinäjoki between 1976 and 2026, these are the recorded extremes during May.
- The warmest day in May was on May 24, 2014, with a maximum of 29°C (84°F).
- The coldest night in May in Seinäjoki was on May 3, 1999, with a minimum of -9°C (16°F).
- The wettest May day on record brought 23 mm (0.9 in) of precipitation to Seinäjoki (May 21, 2009).
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
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What to Wear in Seinäjoki 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. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Seinäjoki 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 Seinäjoki's climate page.
See the full Seinäjoki climate overview or explore weather in Finland.
