Nagano weather in April
In April, Nagano sees average daytime highs of 13°C and overnight lows near 3°C, with 115 mm of precipitation across 14.6 wet days and about 12.9 hours of daylight. It is the 7th-warmest and 12th-wettest month of the year here.
Highs climb over the month, from about 10°C in the first days to 16°C by the end. The sky is clear or mostly clear about 27% of the time in April, and the air most often feels dry.
Daylight stretches from about 12 h 18 min at the start of April to 13 h 24 min by month's end. Set against the rest of the year, April is Nagano's 1st-clearest and 2nd-windiest month. For the whole year in context, see Nagano's year-round climate.
- Daytime high
- 13°
- 7th warmest
- Overnight low
- 3°
- 6th coldest
- Precipitation
- 115 mm
- 14.6 wet days
- Daylight
- 12 h 54 min
- 5:19 AM – 6:16 PM
- Cloud cover
- 62%
- 1st clearest
- Wind
- 6 km/h
- 2nd windiest
- Solar energy
- 5.31 kWh/m²
- Travel score
- 3.4
- out of 10
Temperature in April
Highs climb over the month, from about 10°C in the first days to 16°C by the end.
A typical April day in Nagano reaches about 13°C in the afternoon and slips back to 3°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 19°C. Set against its neighbours, April runs about 7°C warmer than March and about 6°C cooler than May.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 17 | 17 | 17 |
| Avg low (°C) | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 6 | 6 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 10 | 0 |
| 2 | 10 | 0 |
| 3 | 10 | 0 |
| 4 | 10 | 0 |
| 5 | 11 | 1 |
| 6 | 11 | 1 |
| 7 | 11 | 1 |
| 8 | 11 | 1 |
| 9 | 12 | 1 |
| 10 | 12 | 2 |
| 11 | 12 | 2 |
| 12 | 12 | 2 |
| 13 | 13 | 2 |
| 14 | 13 | 2 |
| 15 | 13 | 3 |
| 16 | 13 | 3 |
| 17 | 14 | 3 |
| 18 | 14 | 3 |
| 19 | 14 | 3 |
| 20 | 14 | 4 |
| 21 | 15 | 4 |
| 22 | 15 | 4 |
| 23 | 15 | 4 |
| 24 | 15 | 5 |
| 25 | 16 | 5 |
| 26 | 16 | 5 |
| 27 | 16 | 5 |
| 28 | 17 | 5 |
| 29 | 17 | 6 |
| 30 | 17 | 6 |
How April really feels in Nagano
Once humidity and wind are folded in, April averages 0 days that feel above 32°C and 10 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in April is cold — wind chill drags the overnight "feels like" below the raw low.
Nagano weather by month
How April compares with the rest of the year at a glance. April is the 7th-warmest and 12th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 2° / -6° | 147 | 22.8 | 23.4 | 9.8 | 0.0 |
| Feb | 2° / -5° | 120 | 18.9 | 18.5 | 10.6 | 0.0 |
| Mar | 6° / -2° | 138 | 18.6 | 14.8 | 11.7 | 0.6 |
| Apr | 13° / 3° | 115 | 14.6 | 3.5 | 12.9 | 3.4 |
| May | 19° / 9° | 133 | 14.7 | 0.1 | 13.9 | 5.5 |
| Jun | 23° / 14° | 178 | 18.1 | 0 | 14.5 | 5.2 |
| Jul | 26° / 18° | 243 | 21.7 | 0 | 14.2 | 4.7 |
| Aug | 27° / 19° | 169 | 19.6 | 0 | 13.4 | 4.9 |
| Sep | 23° / 15° | 182 | 17 | 0 | 12.2 | 5.4 |
| Oct | 17° / 8° | 161 | 15.6 | 0.1 | 11.1 | 4.7 |
| Nov | 11° / 2° | 116 | 16.4 | 4.6 | 10 | 2.3 |
| Dec | 5° / -3° | 138 | 20.4 | 17 | 9.5 | 0.2 |
Cloud cover in April
The sky is clear or mostly clear about 27% of the time in April, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 17% of April, with mostly cloudy or overcast conditions the remaining 57%. Skies tend to open up as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 44 | 44 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 45 | 44 | 45 | 44 | 44 | 43 | 43 | 42 | 42 | 41 | 41 | 41 | 41 | 41 | 42 | 41 | 41 | 42 | 42 | 42 |
| Cloudier (%) | 56 | 56 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 55 | 56 | 55 | 56 | 56 | 57 | 57 | 58 | 58 | 59 | 59 | 59 | 59 | 59 | 58 | 59 | 59 | 58 | 58 | 58 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 44 | 56 |
| 2 | 44 | 56 |
| 3 | 45 | 55 |
| 4 | 45 | 55 |
| 5 | 45 | 55 |
| 6 | 45 | 55 |
| 7 | 45 | 55 |
| 8 | 45 | 55 |
| 9 | 45 | 55 |
| 10 | 45 | 55 |
| 11 | 45 | 55 |
| 12 | 44 | 56 |
| 13 | 45 | 55 |
| 14 | 44 | 56 |
| 15 | 44 | 56 |
| 16 | 43 | 57 |
| 17 | 43 | 57 |
| 18 | 42 | 58 |
| 19 | 42 | 58 |
| 20 | 41 | 59 |
| 21 | 41 | 59 |
| 22 | 41 | 59 |
| 23 | 41 | 59 |
| 24 | 41 | 59 |
| 25 | 42 | 58 |
| 26 | 41 | 59 |
| 27 | 41 | 59 |
| 28 | 42 | 58 |
| 29 | 42 | 58 |
| 30 | 42 | 58 |
Chance of precipitation in April
Nagano gets around 115 mm of rain and snow over 14.6 wet days in April, the driest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 49% and peaks near 54% on the wettest days, and about 4 days bring snow. The odds ease toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 54 | 54 | 53 | 53 | 53 | 52 | 52 | 51 | 51 | 51 | 50 | 50 | 49 | 49 | 49 | 48 | 48 | 48 | 47 | 47 | 47 | 47 | 46 | 46 | 46 | 45 | 45 | 44 | 44 | 43 |
| Snow chance (%) | 30 | 28 | 27 | 25 | 24 | 22 | 21 | 19 | 18 | 17 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 6 | 5 | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 2 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 54 | 30 |
| 2 | 54 | 28 |
| 3 | 53 | 27 |
| 4 | 53 | 25 |
| 5 | 53 | 24 |
| 6 | 52 | 22 |
| 7 | 52 | 21 |
| 8 | 51 | 19 |
| 9 | 51 | 18 |
| 10 | 51 | 17 |
| 11 | 50 | 15 |
| 12 | 50 | 14 |
| 13 | 49 | 13 |
| 14 | 49 | 12 |
| 15 | 49 | 11 |
| 16 | 48 | 10 |
| 17 | 48 | 9 |
| 18 | 48 | 8 |
| 19 | 47 | 7 |
| 20 | 47 | 6 |
| 21 | 47 | 6 |
| 22 | 47 | 5 |
| 23 | 46 | 4 |
| 24 | 46 | 4 |
| 25 | 46 | 3 |
| 26 | 45 | 3 |
| 27 | 45 | 3 |
| 28 | 44 | 2 |
| 29 | 44 | 2 |
| 30 | 43 | 2 |
Humidity in April
Most of April feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, April lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 100 | 99 | 99 | 99 | 99 | 99 | 99 | 99 |
| Comfortable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | |
|---|---|---|
| 1 | 100 | 0 |
| 2 | 100 | 0 |
| 3 | 100 | 0 |
| 4 | 100 | 0 |
| 5 | 100 | 0 |
| 6 | 100 | 0 |
| 7 | 100 | 0 |
| 8 | 100 | 0 |
| 9 | 100 | 0 |
| 10 | 100 | 0 |
| 11 | 100 | 0 |
| 12 | 100 | 0 |
| 13 | 100 | 0 |
| 14 | 100 | 0 |
| 15 | 100 | 0 |
| 16 | 100 | 0 |
| 17 | 100 | 0 |
| 18 | 100 | 0 |
| 19 | 100 | 0 |
| 20 | 100 | 0 |
| 21 | 100 | 0 |
| 22 | 100 | 0 |
| 23 | 100 | 0 |
| 24 | 99 | 1 |
| 25 | 99 | 1 |
| 26 | 99 | 1 |
| 27 | 99 | 1 |
| 28 | 99 | 1 |
| 29 | 99 | 1 |
| 30 | 99 | 1 |
Wind in April
Winds average 6 km/h in April.
Across April, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 6 | calm |
| 2 | 6 | calm |
| 3 | 6 | calm |
| 4 | 6 | calm |
| 5 | 6 | calm |
| 6 | 6 | calm |
| 7 | 6 | calm |
| 8 | 6 | calm |
| 9 | 6 | calm |
| 10 | 6 | calm |
| 11 | 6 | calm |
| 12 | 6 | calm |
| 13 | 6 | calm |
| 14 | 6 | calm |
| 15 | 6 | calm |
| 16 | 6 | calm |
| 17 | 6 | calm |
| 18 | 6 | calm |
| 19 | 6 | calm |
| 20 | 6 | calm |
| 21 | 6 | calm |
| 22 | 6 | calm |
| 23 | 6 | calm |
| 24 | 6 | calm |
| 25 | 6 | calm |
| 26 | 6 | calm |
| 27 | 6 | calm |
| 28 | 6 | calm |
| 29 | 6 | calm |
| 30 | 6 | calm |
Sunrise & sunset in April
Daylight runs from about 12 h 18 min at the start of April to 13 h 24 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 66 minutes over April. Sunrise moves from 5:41 AM to 5:01 AM, and sunset from 6:02 PM to 6:28 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.3 | 12.4 | 12.4 | 12.5 | 12.5 | 12.5 | 12.6 | 12.6 | 12.7 | 12.7 | 12.7 | 12.8 | 12.8 | 12.9 | 12.9 | 12.9 | 13.0 | 13.0 | 13.0 | 13.1 | 13.1 | 13.2 | 13.2 | 13.2 | 13.3 | 13.3 | 13.3 | 13.4 | 13.4 | 13.4 |
| Sunrise (AM) | 5:41 | 5:40 | 5:38 | 5:37 | 5:35 | 5:34 | 5:32 | 5:31 | 5:29 | 5:28 | 5:27 | 5:25 | 5:24 | 5:22 | 5:21 | 5:19 | 5:18 | 5:17 | 5:15 | 5:14 | 5:13 | 5:11 | 5:10 | 5:09 | 5:07 | 5:06 | 5:05 | 5:04 | 5:02 | 5:01 |
| Sunset (PM) | 6:02 | 6:03 | 6:04 | 6:05 | 6:06 | 6:07 | 6:08 | 6:09 | 6:09 | 6:10 | 6:11 | 6:12 | 6:13 | 6:14 | 6:15 | 6:16 | 6:16 | 6:17 | 6:18 | 6:19 | 6:20 | 6:21 | 6:22 | 6:23 | 6:24 | 6:24 | 6:25 | 6:26 | 6:27 | 6:28 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.3 | 5:41 | 6:02 |
| 2 | 12.4 | 5:40 | 6:03 |
| 3 | 12.4 | 5:38 | 6:04 |
| 4 | 12.5 | 5:37 | 6:05 |
| 5 | 12.5 | 5:35 | 6:06 |
| 6 | 12.5 | 5:34 | 6:07 |
| 7 | 12.6 | 5:32 | 6:08 |
| 8 | 12.6 | 5:31 | 6:09 |
| 9 | 12.7 | 5:29 | 6:09 |
| 10 | 12.7 | 5:28 | 6:10 |
| 11 | 12.7 | 5:27 | 6:11 |
| 12 | 12.8 | 5:25 | 6:12 |
| 13 | 12.8 | 5:24 | 6:13 |
| 14 | 12.9 | 5:22 | 6:14 |
| 15 | 12.9 | 5:21 | 6:15 |
| 16 | 12.9 | 5:19 | 6:16 |
| 17 | 13.0 | 5:18 | 6:16 |
| 18 | 13.0 | 5:17 | 6:17 |
| 19 | 13.0 | 5:15 | 6:18 |
| 20 | 13.1 | 5:14 | 6:19 |
| 21 | 13.1 | 5:13 | 6:20 |
| 22 | 13.2 | 5:11 | 6:21 |
| 23 | 13.2 | 5:10 | 6:22 |
| 24 | 13.2 | 5:09 | 6:23 |
| 25 | 13.3 | 5:07 | 6:24 |
| 26 | 13.3 | 5:06 | 6:24 |
| 27 | 13.3 | 5:05 | 6:25 |
| 28 | 13.4 | 5:04 | 6:26 |
| 29 | 13.4 | 5:02 | 6:27 |
| 30 | 13.4 | 5:01 | 6:28 |
Solar energy in April
Average shortwave solar energy reaching the ground each day in April, about 5.31 kWh/m².
For context, solar energy here swings from a low near 2.15 kWh/m² to a high of 5.65 kWh/m² in May across the year — April's 5.31 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.0 | 5.0 | 5.0 | 5.1 | 5.1 | 5.1 | 5.1 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.4 | 5.4 | 5.4 | 5.4 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.0 | Bright |
| 2 | 5.0 | Bright |
| 3 | 5.0 | Bright |
| 4 | 5.1 | Bright |
| 5 | 5.1 | Bright |
| 6 | 5.1 | Bright |
| 7 | 5.1 | Bright |
| 8 | 5.2 | Bright |
| 9 | 5.2 | Bright |
| 10 | 5.2 | Bright |
| 11 | 5.2 | Bright |
| 12 | 5.2 | Bright |
| 13 | 5.3 | Bright |
| 14 | 5.3 | Bright |
| 15 | 5.3 | Bright |
| 16 | 5.3 | Bright |
| 17 | 5.3 | Bright |
| 18 | 5.3 | Bright |
| 19 | 5.3 | Bright |
| 20 | 5.3 | Bright |
| 21 | 5.4 | Bright |
| 22 | 5.4 | Bright |
| 23 | 5.4 | Bright |
| 24 | 5.4 | Bright |
| 25 | 5.5 | Bright |
| 26 | 5.5 | Bright |
| 27 | 5.5 | Bright |
| 28 | 5.5 | Bright |
| 29 | 5.5 | Bright |
| 30 | 5.5 | Bright |
Hazard calendar for Nagano
In April, Nagano sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Nagano sits in the Pacific typhoon belt; the season peaks July–October.
Is April a good time to visit Nagano?
Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
April is a weaker month for outdoor sightseeing in Nagano.
What to pack for Nagano in April
From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In April, Nagano sees daytime highs around 13°C and nights near 3°C. Pack rain gear. Worth having: a warm layer and sun protection. About 15 days see rain.
Sea temperature near Nagano in April
The nearest coast averages about 11°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 53 km away) is warmest in August at about 27°C and coldest in March near 10°C.
It's comfortable for a long swim from Jun 20 to Nov 1 — about 4.4 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 13 | 11 | 10 | 11 | 15 | 20 | 23 | 27 | 25 | 22 | 19 | 15 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Warm | Warm | Refreshing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 13 | Bracing |
| Feb | 11 | Bracing |
| Mar | 10 | Bracing |
| Apr | 11 | Bracing |
| May | 15 | Bracing |
| Jun | 20 | Cool |
| Jul | 23 | Refreshing |
| Aug | 27 | Warm |
| Sep | 25 | Warm |
| Oct | 22 | Refreshing |
| Nov | 19 | Cool |
| Dec | 15 | Cool |
UV index in Nagano in April
Clear-sky midday UV in April peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Nagano peaks around August 11 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 4 | 5 | 8 | 9 | 9 | 10 | 10 | 9 | 6 | 3 | 2 |
| Level | Moderate | Moderate | High | Very high | Very high | Very high | Very high | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 4 | Moderate |
| Mar | 5 | High |
| Apr | 8 | Very high |
| May | 9 | Very high |
| Jun | 9 | Very high |
| Jul | 10 | Very high |
| Aug | 10 | Extreme |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Moderate |
Air quality in Nagano in April
Average fine-particle pollution (PM2.5) through the year — so you can see where April falls, not just the annual average.
Air quality in Nagano is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 10 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 11 | 14 | 20 | 21 | 20 | 18 | 15 | 13 | 12 | 11 | 11 | 10 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 14 | Moderate |
| Mar | 20 | Moderate |
| Apr | 21 | Moderate |
| May | 20 | Moderate |
| Jun | 18 | Moderate |
| Jul | 15 | Moderate |
| Aug | 13 | Moderate |
| Sep | 12 | Good |
| Oct | 11 | Good |
| Nov | 11 | Good |
| Dec | 10 | Good |
Where is Nagano?
Nagano sits at 36.6°N, 138.2°E, 372 m above sea level, in Japan. The nearest listed city is Suzaka, 12 km away.
Topography around Nagano
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Nagano.
Within 3 km, the terrain around Nagano has significant variations in elevation — a maximum elevation change of 548 m around an average of 450 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,583 m; within 80 km, extreme variations in elevation — a maximum elevation change of 3,130 m.
The land around Nagano is covered by artificial surfaces (60%) and trees (36%) within 3 km, trees (68%) within 16 km, and trees (74%) within 80 km.
Japan travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type A / B
- 100 V · 50 / 60 Hz
- Prices
- ≈ 65% of US
- price level, 2025
- GDP per capita
- $35,951
- 2025
- Happiness
- 6.1 / 10
- World Happiness, 2025
- Safe drinking water
- 99%
- of population, 2024
- Homicide rate
- 0.2
- per 100k, 2023
- Road deaths
- 3.6
- per 100k/yr, 2019
- Income group
- High
- World Bank
- English
- Very low
- EF EPI 446
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Nagano (36.65°, 138.1833°, elevation 372 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).