Mariehamn Weather in October
During October, Mariehamn experiences low daytime temperatures of 11°C (52°F) and cooler nights around 7°C (45°F). As the wettest month of the year, expect frequent rainfall.
Rainfall in Mariehamn in October
With frequent rain showers this month, having an umbrella on hand will keep you dry. Records from the past 30 years suggest around 16 days of rain, with 67 mm (2.6 in) average for the month. Rain falls on many days this month, but usually in relatively small amounts. A light waterproof is more useful than a heavy umbrella.
Temperature in Mariehamn in October
In October, expect low temperatures in Mariehamn, with highs of 11°C (52°F) and lows of 7°C (45°F) at night. Temperatures remain on the cold side all day. A proper warm jacket is worth having, not just for evenings. With lows around 7°C (45°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.For Mariehamn itself, July and August generally stand out with 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 Mariehamn's climate page.
Mariehamn Temperature in October
Min Temperature
7°C (45°F)
Max Temperature
11°C (52°F)
Chance of Rain
53%
Precipitation
67 mm (2.6 in)
Rainy days
16 days
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Mariehamn typically drop from around 12°C (54°F) at the start of October to approximately 7°C (45°F) by the end. Nights are cold, with lows typically ranging from 2°C (36°F) to 7°C (45°F).
Average temperatures in October
Historical weather for Mariehamn in October
Browse day-by-day weather records for Mariehamn spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Mariehamn historical weather extremes in October
Based on 49 years of weather observations in Mariehamn between 1976 and 2025, these are the recorded extremes.
- The warmest day in October was on October 2, 2015, with a maximum of 18°C (64°F).
- Mariehamn experienced its chilliest October day on October 30, 1992, reaching only -2°C (28°F).
- The lowest overnight temperature recorded in October was -11°C (12°F) (October 30, 1988).
Best Places in Finland in October
Find out more about the weather in Finland and which places have the best travel conditions in this month. See all of Finland in October →
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What to Wear in Mariehamn in October
The weather can be unpredictable in October, 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 Mariehamn in October
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 Mariehamn's climate page.
See the full Mariehamn climate overview or explore weather in Finland.
