Normally, you can expect the weather in Seinajoki during May is 7 with usual highs being around 15 degrees with a low of 3 celsius. The table below includes more detail:
| Month | Degrees Celsius |
|---|---|
| Temperature | 7 |
| High Temperature | 15 |
| Low Temperature | 3 |
Useful Links: Seinajoki Weather: Average Weather & Yearly Climate