Weather in Rovaniemi in August
Finland · 20-year averages, August
Shoulder season. August is shoulder season in Rovaniemi — cheaper, quieter, and a genuine gamble. You should expect rain on 16 days of the month, which is more days wet than dry.
August ranks 2 of 12 in Rovaniemi. Only July scores clearly higher, and the difference is small enough to be settled by price rather than weather.
This is persistent light rain rather than storms: 16 wet days but only 2 heavy ones. It rarely cancels anything outright, and it rarely fully clears either. A jacket beats an umbrella. Pack for 17.1 °C days and 9.7 °C nights; the spread matters more here than any single number.
What the averages hide
The averages here are honest — no hidden extremes worth planning around. Across the twenty years measured, the hottest August day reached 26.7 °C and the coldest night fell to 1.4 °C, and the wettest single day dropped 28 mm — roughly 33% of the month's rain in one day.
August is statistically steady but not small: the year-to-year variation is modest in relative terms, yet the wettest August on record still delivered 125 mm against 22 mm in the driest. In a month this wet, even a tame spread is a lot of rain in absolute terms — the 85 mm average is a reasonable planning figure, not a promise.
Wind is light at 0.6 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 86%, high enough to notice on the warm days without dominating them.
How August sits in the year
The month is on the way down: 2.5 °C cooler than July, with September dropping another 5.5 °C. The first week and the last are not the same trip.
Daylight in August
17.1 hours of daylight, losing 3.9 hours across the month. That is between Rovaniemi's extremes of 24 and 2.5 hours, so days are long enough not to constrain the plan.
An inland climate
With no coast nearby, the year swings a fair way — 35.1 °C between the warmest afternoons and the coldest nights, wider than any coastal city at this latitude would manage.
How busy it gets
Peak season. Expect the highest prices of the year and to be booking well ahead.
Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.
August in Rovaniemi versus nearby
If Rovaniemi is one option among several, the nearby comparison is worth making. Umeå is close enough to be a coin toss — within a degree on temperature, 1 day less rain. Tromsø is the weaker option in August — 3 °C cooler, 2 days more rain.
So: August is effectively as good as it gets here — 5 points behind July, which is inside the margin where the weather stops being the deciding factor and price starts being it.
Every month in Rovaniemi
| Month | High °C | Low °C | Rain days | Rain mm | Humidity % | Daylight h | Score |
|---|---|---|---|---|---|---|---|
| January | -9.4 | -15.5 | 12 | 48 | 100 | 4.1 | 19 |
| February | -8.4 | -14.9 | 11 | 39 | 100 | 8.1 | 20 |
| March | -3.7 | -10.8 | 10 | 41 | 99 | 11.5 | 22 |
| April | 1.7 | -4.2 | 10 | 46 | 96 | 15.3 | 26 |
| May | 10.8 | 2.5 | 14 | 70 | 82 | 19.3 | 45 |
| June | 16 | 7.9 | 15 | 83 | 78 | 24 | 60 |
| July | 19.6 | 11.5 | 18 | 92 | 82 | 21.6 | 67 |
| August | 17.1 | 9.7 | 16 | 85 | 86 | 17.1 | 62 |
| September | 11.6 | 5.4 | 15 | 82 | 91 | 13.3 | 46 |
| October | 3.2 | -0.6 | 14 | 65 | 96 | 9.7 | 25 |
| November | -3 | -7.2 | 14 | 61 | 99 | 5.8 | 15 |
| December | -6.3 | -12.3 | 15 | 56 | 99 | 2.5 | 14 |
See all twelve months in Rovaniemi, or where else to go in August.
Planning the rest of the trip
- Flight time to Rovaniemi how long you are actually in the air
- Rovaniemi time zone and the difference from home
- Days until your trip count down to the departure date