Helsinki
May
Weather in Helsinki for May 2025
Your guide to Helsinki weather in May - trends and predictions
In general, the average temperature in Helsinki at the beginning of May is 8.6 °C. As the month progressed, temperatures tended to significantly warm up, reaching an average of 18.1 °C by the end of May.
With an average of 4 rainy days, Helsinki experiences minimal rainfall in May, ensuring that most days remain pleasantly dry.
Is May a good time to visit Helsinki? check out the best time to travel to Helsinki page.
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27
Dry days
4
Rainy days
0
Snow days
15°/5°
Temperatures
18 km/h
Avg max wind
62 %
Avg humidity
Helsinki in May average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  10° | 2  8° | 3 9° | 4 10° | |||
| 5 7° | 6 7° | 7  9° | 8  9° | 9 10° | 10  13° | 11  14° |
| 12 15° | 13 15° | 14 17° | 15 17° | 16 15° | 17 17° | 18 14° |
| 19 16° | 20 17° | 21 17° | 22 16° | 23 17° | 24 20° | 25  19° |
| 26 16° | 27 19° | 28 18° | 29 18° | 30 18° | 31 19° |
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Temperatures trend during May in Helsinki
See the weather trend as well as the moving average line
May weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May | Patchy rain possible | 10° /2° | 0.5 mm | 3 | |
| 2 May | Moderate or heavy rain shower | 8° /3° | 9.8 mm | 3 | |
| 3 May | Moderate rain at times | 9° /2° | 0.6 mm | 2 | |
| 4 May | Patchy rain possible | 10° /3° | 0.7 mm | 3 | |
| 5 May | Patchy rain possible | 7° /1° | 0.4 mm | 3 | |
| 6 May | Patchy rain possible | 7° /1° | 0.4 mm | 3 | |
| 7 May | Cloudy | 9° /0° | 0 mm | 3 | |
| 8 May | Partly cloudy | 9° /0° | 0 mm | 4 | |
| 9 May | Partly cloudy | 10° /1° | 0.4 mm | 4 | |
| 10 May | Overcast | 13° /4° | 1.5 mm | 3 | |
| 11 May | Sunny | 14° /4° | 0 mm | 5 | |
| 12 May | Sunny | 15° /4° | 0 mm | 4 | |
| 13 May | Sunny | 15° /6° | 0 mm | 4 | |
| 14 May | Sunny | 17° /9° | 0 mm | 5 | |
| 15 May | Sunny | 17° /8° | 0 mm | 5 | |
| 16 May | Moderate or heavy rain shower | 15° /9° | 4 mm | 4 | |
| 17 May | Overcast | 17° /8° | 0.2 mm | 5 | |
| 18 May | Cloudy | 14° /7° | 0 mm | 4 | |
| 19 May | Sunny | 16° /6° | 0 mm | 5 | |
| 20 May | Sunny | 17° /8° | 0 mm | 5 | |
| 21 May | Cloudy | 17° /7° | 0 mm | 5 | |
| 22 May | Overcast | 16° /8° | 0.1 mm | 5 | |
| 23 May | Patchy rain possible | 17° /9° | 0.3 mm | 5 | |
| 24 May | Sunny | 20° /9° | 0 mm | 6 | |
| 25 May | Heavy rain at times | 19° /11° | 4.5 mm | 5 | |
| 26 May | Moderate rain at times | 16° /9° | 1.1 mm | 4 | |
| 27 May | Patchy rain possible | 19° /7° | 0.1 mm | 5 | |
| 28 May | Overcast | 18° /9° | 0.1 mm | 5 | |
| 29 May | Partly cloudy | 18° /9° | 0.8 mm | 5 | |
| 30 May | Heavy rain at times | 18° /9° | 1.7 mm | 4 | |
| 31 May | Moderate rain at times | 19° /8° | 0.3 mm | 5 | |
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Important Notice
Our weather forecast for Helsinki in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Helsinki forecast closer to your planned date for the most up-to-date weather information.
Helsinki in May - FAQ
What are the expected maximum and minimum temperatures in Helsinki during May?
During May, expect a variety of temperatures with highs around 15° and lows near 5°, suitable for diverse activities and preferences.
How much rainfall should be expected in Helsinki during May?
In May, Helsinki can expect light to moderate rainfall, totaling 45.3 mm across approximately 4 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Helsinki during May?
The average wind speed in Helsinki during May is 18 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Helsinki in May?
As you prepare for your trip to Helsinki in May, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Helsinki, during May, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Accessories
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
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