Nagano
Japan · Asia
Year-round range: 25°F to 84°F
May
Excellent conditions this month
Expect the month to feel wet and cloudy overall; any bright breaks do not cancel out the frequent rain.
Your monthly fit score
Comfort fit by month.
Climate details▼
Temperature
Average highs and lows.
May has comfortable temperatures — not too hot, not too cold.
Shaded band = typical daily swing (P10 of night lows to P90 of afternoon peaks) — spans wider than avg high/low lines because it captures day-to-day variation.
| = MayPrecipitation
Monthly precipitation, wet-day risk, and snow signal where relevant.
May is one of the wetter months — pack rain gear.
Sunshine
Average hours of bright sun per day.
Expect the month to feel wet and cloudy overall; any bright breaks do not cancel out the frequent rain.
Clear sky
Clear-sky share is the inverse of average cloud cover (100% minus cloud cover). Band labels follow standard meteorological categories; distribution within each band varies by day.
Air comfort by month
Humidity and heat feel by month.
May is mostly comfortable — low heat and humidity pressure.
Time-of-day patterns
Typical hourly rhythm for May.
Temperature by hour
Temperature by hour and month
Typical temperature through the day across the year (1996-2025 normals, local time). Shaded cells are nighttime.
In May, afternoons reach about 71° and nights settle near 56°.
▶Full month-by-month data
| Month | High °F | Low °F | Rain days | Rain (in) | Sun h/day | Humidity |
|---|---|---|---|---|---|---|
| Jan | 37°F | 25°F | 20 | 2.4in | 3.4h | 75.28571428571428% |
| Feb | 39°F | 26°F | 15 | 2.6in | 3.7h | 74% |
| Mar | 47°F | 32°F | 13 | 2.8in | 4.4h | 72.57142857142857% |
| Apr | 59°F | 41°F | 12 | 2.9in | 5h | 69.14285714285714% |
| May | 70°F | 51°F | 13 | 3.4in | 4.9h | 70.42857142857143% |
| Jun | 76°F | 60°F | 16 | 4.6in | 3.9h | 77.42857142857142% |
| Jul | 82°F | 68°F | 21 | 6.3in | 4.1h | 82.42857142857142% |
| Aug | 84°F | 69°F | 19 | 5.1in | 4.7h | 80.57142857142857% |
| Sep | 76°F | 62°F | 16 | 5.2in | 4h | 81.71428571428571% |
| Oct | 65°F | 50°F | 14 | 4.1in | 4h | 80.85714285714286% |
| Nov | 55°F | 39°F | 15 | 2.2in | 3.9h | 78.85714285714285% |
| Dec | 42°F | 29°F | 20 | 2.6in | 3.4h | 77% |
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Planning notes
Expect some rain.