Weather in Helsinki in October 2025
Average weather
Average temperature in Helsinki in October
The temperature in October is +7°C on average, with a range between a maximum of +15°C during the day and a minimum of -2°C at night.
The average maximum temperature goes down 53% by the end of the month, compared with the beginning of the month, from +15°C to +6°C.
Is Helsinki warm or cold in October?
Helsinki is typically cool in October.
Maximum temperatures go down compared to the previous month from +14°C to +9°C. The minimum temperature also goes down from +9°C to +4°C.
Pack a sweater and a jacket as there will be cooler temperatures.
Take a look at how October is compared to other months in Helsinki:
Water temperature in Helsinki in October
Water in Helsinki in October is Cold. It varies from 0°C to +13°C, with an average of +7°C. This is almost similar to the air temperature, which averages +9°C.
In October, water temperatures are average relative to the rest of the year:
Can you swim in Helsinki in October?
Climate in Helsinki in October
| September | October | November | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +14°C | +9°C | +4°C | ||||
| Min. temperature | ||||||
| 0°C | -8°C | -17°C | ||||
| Max. temperature | ||||||
| +22°C | +18°C | +13°C | ||||
| Rainfall | ||||||
| 78 mm | 83 mm | 55 mm | ||||
| Wind | ||||||
| 4 m/s | 4 m/s | 4 m/s | ||||
| Avg. water temperature | ||||||
| +10°C | +7°C | +4°C | ||||
| Humidity | ||||||
| 81% | 84% | 87% | ||||
| Air pressure | ||||||
| 1011 HPa | 1011 HPa | 1010 HPa | ||||
| Sunny days | ||||||
| 5 | 4 | 2 | ||||
| Cloudy days | ||||||
| 8 | 8 | 8 | ||||
| Rainy days | ||||||
| 16 | 17 | 12 | ||||
| Snowy days | ||||||
| 0 | 2 | 8 | ||||
October weather is still as ok as in September. It’s getting colder in October. From +14°C in the day, the average maximum temperature lowers to +9°C. Prepare for more rain. Average rainfall goes from 78 mm to 83 mm. Humidity rises from 81% to 84%. The average wind speed doesn’t change much during October, staying around 4 m/s. The days becoming less sunny, going from 5 sunny days in September to 4 in October.
Next month (November) brings a further decline in the weather.
Wind
The average wind speed is 6 m/s getting up to 14 m/s which is quite strong. The wind will cause branches to move and ground debris to fly around.
The average wind speed in Helsinki is gradually decreasing during October, going from 9 m/s to 8 m/s over the course of the month.
Rain
Snow
Here’s how October is compared with other months in the amount of snow, total mm:
How was the weather last October in Helsinki?
Climate Change over Years
The climate in Helsinki in October has not changed much over the last 43 years.
The average temperature was the lowest in 1987 (+5°C) and the highest in 2020 (+11°C). The driest year was 2002 with only 248 mm of rainfall, and the wettest year was 2020 with 1153 mm.
FAQ
Is October a good time to visit Helsinki?
Can you sunbathe in Helsinki in October?
Can you swim in Helsinki in October?
Is Helsinki rainy in October?
Is it sunny in Helsinki in October?
Other cities in Finland
Monthly weather in Helsinki
Source of the data
For this page, we’ve looked at the typical weather in Helsinki, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.