Our verdict
The best time to visit Helsinki is April-May
During the warmer months, temperatures in Helsinki can rise to a maximum of 26℃ (78℉). The weather in the winter, especially around January, can reach a minimum of -15℃ (6℉).
If you’re a sun-chaser and want to visit Helsinki when the days are longest, you should visit in June. On average it rains the most days in December, making it the wettest month of the year. Although it’s the wet season, it can often rain a little bit during the day or evening but have fine weather for a majority of the day too, so don’t let this put you off.
For more information about when to travel to Helsinki, the monthly weather breakdown and the best information and tools to book your trip, continue reading below.
Quick links: Fast facts / Seasons / Average temperatures / Monthly climate / FAQs / Map
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Helsinki seasons
Before you continue, it’s important to know when the seasons are in Helsinki as they might be different to yours depending on where in the world you’re travelling from. Helsinki is in the Northern Hemisphere, so the seasons fall during these months:
| Season | Months |
|---|---|
| Summer | June to August |
| Autumn/fall | September to November |
| Winter | December to February |
| Spring | March to May |
Average temperatures in Helsinki
If the temperature is a big factor for you to help you decide when to visit, the chart below shows the average minimum and maximum temperatures in Helsinki for each month side-by-side so you can easily see the difference in weather throughout the year. To see the temperatures in both Celsius (°C) and Fahrenheit (°F), hover or tap the shaded boxes on the graph.
Helsinki climate by month
If you already have a rough idea about which months you might want to travel, the section below shows a detailed breakdown of the climate in Helsinki for each month so you can see if it all suits your wants and needs. Scroll down, or use the quick menu below to jump to your preferred month.
Jump to:
Helsinki in January
- Average temperature: -4℃ (26℉)
- Average high temperature: -2℃ (28℉)
- Average low temperature: -6℃ (22℉)
- Average humidity: 90%
- Average sunny days: 9 days
- Average rainfall: 39mm (2") over 7 days
- Average snow days: 18 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Helsinki in January, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Helsinki in February
- Average temperature: -3℃ (26℉)
- Average high temperature: -2℃ (29℉)
- Average low temperature: -5℃ (22℉)
- Average humidity: 91%
- Average sunny days: 8 days
- Average rainfall: 42mm (2") over 6 days
- Average snow days: 18 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Helsinki in February, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Helsinki in March
- Average temperature: -1℃ (30℉)
- Average high temperature: 1℃ (33℉)
- Average low temperature: -4℃ (26℉)
- Average humidity: 89%
- Average sunny days: 9 days
- Average rainfall: 34mm (1") over 10 days
- Average snow days: 17 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Helsinki in March, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Helsinki in April
- Average temperature: 4℃ (39℉)
- Average high temperature: 6℃ (43℉)
- Average low temperature: 1℃ (35℉)
- Average humidity: 80%
- Average sunny days: 13 days
- Average rainfall: 27mm (1") over 12 days
- Average snow days: 5 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Helsinki in April, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Helsinki in May
- Average temperature: 10℃ (50℉)
- Average high temperature: 13℃ (55℉)
- Average low temperature: 7℃ (44℉)
- Average humidity: 72%
- Average sunny days: 17 days
- Average rainfall: 29mm (1") over 12 days
- Average snow days: 1 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Helsinki in May, make sure you pack a warm jacket or coat.
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Helsinki in June
- Average temperature: 14℃ (57℉)
- Average high temperature: 17℃ (62℉)
- Average low temperature: 11℃ (52℉)
- Average humidity: 73%
- Average sunny days: 14 days
- Average rainfall: 30mm (1") over 14 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Helsinki in June, make sure you pack a warm jacket or coat.
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Helsinki in July
- Average temperature: 18℃ (64℉)
- Average high temperature: 20℃ (69℉)
- Average low temperature: 15℃ (58℉)
- Average humidity: 75%
- Average sunny days: 12 days
- Average rainfall: 40mm (2") over 16 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Helsinki in July, make sure you pack a light jumper or hoodie for the evenings and some light clothes for the daytime.
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Helsinki in August
- Average temperature: 17℃ (63℉)
- Average high temperature: 20℃ (67℉)
- Average low temperature: 15℃ (58℉)
- Average humidity: 75%
- Average sunny days: 14 days
- Average rainfall: 40mm (2") over 15 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Helsinki in August, make sure you pack a light jumper or hoodie.
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Helsinki in September
- Average temperature: 13℃ (56℉)
- Average high temperature: 15℃ (59℉)
- Average low temperature: 11℃ (52℉)
- Average humidity: 79%
- Average sunny days: 14 days
- Average rainfall: 32mm (1") over 13 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Helsinki in September, make sure you pack a warm jacket or coat.
Helsinki in October
- Average temperature: 7℃ (44℉)
- Average high temperature: 8℃ (47℉)
- Average low temperature: 5℃ (41℉)
- Average humidity: 82%
- Average sunny days: 13 days
- Average rainfall: 45mm (2") over 13 days
- Average snow days: 3 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Helsinki in October, make sure you pack a warm jacket or coat.
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Helsinki in November
- Average temperature: 4℃ (38℉)
- Average high temperature: 5℃ (40℉)
- Average low temperature: 2℃ (36℉)
- Average humidity: 87%
- Average sunny days: 9 days
- Average rainfall: 42mm (2") over 13 days
- Average snow days: 6 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Helsinki in November, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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Helsinki in December
- Average temperature: -0℃ (32℉)
- Average high temperature: 1℃ (34℉)
- Average low temperature: -2℃ (29℉)
- Average humidity: 88%
- Average sunny days: 6 days
- Average rainfall: 47mm (2") over 12 days
- Average snow days: 16 days
of pure sunshine
of showers or rain
What to pack: If you’re heading to Helsinki in December, make sure you pack a thick snow/winter jacket, thermals and some extra layers as it's always very cold.
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