Helsinki Weather in October

Helsinki in October sees low temperatures, with highs around 10°C (50°F) and overnight lows of 3°C (37°F). Rainfall is fairly high at around 65 mm (2.6 in) on average, so pack waterproofs just in case.

Rainfall in Helsinki in October

You can typically expect 17 days of rain this month, averaging around 65 mm (2.6 in). Expect plenty of grey, overcast days rather than intense storms. The rain rarely amounts to much on any given day.

Temperature in Helsinki in October

Daytime highs in Helsinki in October reach 10°C (50°F), with nights around 3°C (37°F). Even at the warmest part of the day, temperatures stay low. Dressing warmly from the start is the sensible approach. Nights drop to 3°C (37°F). Cold nights like these are actually great for sleeping well, as long as you have a warm enough duvet.

Sunshine in Helsinki in October

The city usually sees around 90 hours of sunlight, indicating fewer sunny days.

Wind Speed in Helsinki in October

October sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.

Average water temperature in October

With water temperatures around 9°C (48°F), swimming isn't really an option for most visitors. The cold sets in quickly and a wetsuit won't fully solve it.

If you're looking for dry conditions and comfortable temperatures, October may not be the ideal month to visit Helsinki. Our weather planner can help you explore destinations with more pleasant weather conditions.

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For a detailed overview over the year and the best time to visit Finland, check out our Helsinki's climate page.

Helsinki Temperature in October

Min Temperature 3°C (37°F)  

Max Temperature 10°C (50°F)  

Water Temperature 9°C (48°F)  

Chance of Rain 57%  

Precipitation 65 mm (2.6 in)  

Rainy days 17 days  

Humidity 86%  

Windspeed 4 m/s (8 knots)  

Sunshine 90 hours  

Percentage Sunshine  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Helsinki typically drop from around 11°C (52°F) at the start of October to approximately 6°C (43°F) by the end. Nights are cold, with lows typically ranging from 0°C (32°F) to 5°C (41°F).

Average temperatures in October

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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 October

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Historical weather for Helsinki in October

Browse day-by-day weather records for Helsinki spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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‹ January February March April May June July August September October November December ›

Helsinki historical weather extremes in October

Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Helsinki.

• On October 5, 2005, temperatures climbed to 18°C (64°F), marking the warmest October day on record.
• The lowest overnight temperature recorded in October was -14°C (7°F) (October 22, 2002).

What to Wear in Helsinki in October

Dress warmly and in layers for your trip to Helsinki in October. A good base layer system works wonders. Start with good thermal underwear, add something warm like a fleece sweater, then finish with a waterproof jacket on top. Wet weather is likely, so pack waterproof gear for multiple rainy days. The water temperature sits at about 9°C (48°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. You can probably leave your sunglasses at home, because sunny days are pretty rare this month.

What To Do in Helsinki in October

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

4/10

Cycling

4/10

Walking

4/10

Camping

4/10

Outdoor sports

4/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Finland, check out our Helsinki's climate page.

More climate data for Helsinki

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Helsinki climate overview or explore weather in Finland.