21 cities with 30-year climate records.
| City | Climate | Best time to visit |
|---|---|---|
| Helsinki | June–August | |
| Tampere | June–August | |
| Vantaa | June–August | |
| Oulu | July–August | |
| Turku | June–August | |
| East Helsinki | June–August | |
| Jyväskylä | June–August | |
| Kuopio | June–August | |
| Lahti | June–August | |
| Pori | June–August | |
| Joensuu | June–August | |
| Kouvola | May–August | |
| Lappeenranta | June–August | |
| Vaasa | July–August | |
| Hämeenlinna | June–August | |
| Seinäjoki | June–August | |
| Rovaniemi | June–August | |
| Porvoo | June–August | |
| Mikkeli | June–August | |
| Salo | June–August | |
| Kotka | June–August |