Weather in Helsinki for May 2025
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.
Is May a good time to visit Helsinki? check out the best time to travel to Helsinki page.
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Helsinki in May average weather
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
May weather day by day
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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Helsinki in May - FAQ
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
May rainfall patterns in Helsinki
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