Nagano
May
Weather in Nagano for May 2025
Your guide to Nagano weather in May - trends and predictions
In general, the average temperature in Nagano at the beginning of May is 20.4 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 19.9 °C by the end of May.
Expect significant rainfall in Nagano during May, with an average of 17 rainy days.
Is May a good time to visit Nagano? check out the best time to travel to Nagano page.
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14
Dry days
17
Rainy days
0
Snow days
21°/5°
Temperatures
11 km/h
Avg max wind
72 %
Avg humidity
Nagano in May average weather
Move between months or click on a day
| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  13° | 2  18° | 3  22° | 4 26° | |||
| 5 27° | 6  19° | 7 18° | 8 12° | 9 12° | 10 23° | 11 27° |
| 12 24° | 13  16° | 14 22° | 15 24° | 16 26° | 17 21° | 18 26° |
| 19 21° | 20 22° | 21 16° | 22 24° | 23  26° | 24 26° | 25 18° |
| 26 25° | 27 22° | 28  14° | 29  16° | 30 26° | 31 18° |
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Temperatures trend during May in Nagano
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 | Light rain | 13° /4° | 10.2 mm | 3 | |
| 2 May | Partly cloudy | 18° /1° | 2.3 mm | 5 | |
| 3 May | Sunny | 22° /2° | 0 mm | 6 | |
| 4 May | Sunny | 26° /4° | 0 mm | 7 | |
| 5 May | Partly cloudy | 27° /7° | 0 mm | 7 | |
| 6 May | Patchy rain possible | 19° /10° | 0.2 mm | 4 | |
| 7 May | Light rain | 18° /11° | 5.8 mm | 4 | |
| 8 May | Light rain | 12° /5° | 5.3 mm | 3 | |
| 9 May | Patchy rain possible | 12° /0° | 0.7 mm | 3 | |
| 10 May | Sunny | 23° /0° | 0 mm | 6 | |
| 11 May | Sunny | 27° /4° | 0 mm | 7 | |
| 12 May | Patchy rain possible | 24° /6° | 0.9 mm | 5 | |
| 13 May | Moderate rain | 16° /3° | 36.2 mm | 4 | |
| 14 May | Partly cloudy | 22° /0° | 0 mm | 6 | |
| 15 May | Patchy rain possible | 24° /5° | 0.6 mm | 5 | |
| 16 May | Patchy rain possible | 26° /8° | 1.3 mm | 6 | |
| 17 May | Patchy rain possible | 21° /5° | 0.1 mm | 5 | |
| 18 May | Sunny | 26° /4° | 0 mm | 7 | |
| 19 May | Light drizzle | 21° /7° | 2.6 mm | 5 | |
| 20 May | Light rain shower | 22° /8° | 9.3 mm | 5 | |
| 21 May | Patchy rain possible | 16° /4° | 0.1 mm | 4 | |
| 22 May | Patchy rain possible | 24° /5° | 0.1 mm | 5 | |
| 23 May | Overcast | 26° /7° | 0 mm | 6 | |
| 24 May | Patchy rain possible | 26° /7° | 0.5 mm | 6 | |
| 25 May | Patchy rain possible | 18° /3° | 0.4 mm | 4 | |
| 26 May | Partly cloudy | 25° /3° | 0 mm | 7 | |
| 27 May | Patchy light drizzle | 22° /10° | 1.2 mm | 5 | |
| 28 May | Heavy rain | 14° /11° | 93.8 mm | 3 | |
| 29 May | Fog | 16° /6° | 2.3 mm | 4 | |
| 30 May | Sunny | 26° /6° | 0 mm | 7 | |
| 31 May | Light rain shower | 18° /8° | 14.2 mm | 4 | |
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Important Notice
Our weather forecast for Nagano 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 Nagano forecast closer to your planned date for the most up-to-date weather information.
Nagano in May - FAQ
What are the expected maximum and minimum temperatures in Nagano during May?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 5°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Nagano during May?
Significant rainfall exceeding 188.3 mm is expected in Nagano during May, occurring over more than 17 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Nagano during May?
The average wind speed in Nagano during May is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
What to pack to Nagano in May?
As you prepare for your trip to Nagano 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 Nagano, during May, is comfortable and enjoyable, regardless of the weather conditions.
- Clothing
- Warm Clothing: Sweaters, hoodies, long pants
- Rain Gear: Lightweight, waterproof clothing
- Footwear
- Waterproof Shoes
- Accessories
- Sunglasses: For sun protection
- Sun Hats: Wide-brimmed hats for sun protection in warm weather
- Scarves: To protect you from the cold wind
- Gloves/Mittens: Essential for cold weather
- Warm Hats: Warm hats for insulation in cold weather
- Umbrellas/Raincoats: For rainy days
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