Asahi weather in April
In April, Asahi sees average daytime highs of 16°C and overnight lows near 12°C, with 119 mm of rain across 12.6 wet days and about 12.9 hours of daylight. It is the 8th-warmest and 8th-wettest month of the year here.
Highs climb over the month, from about 15°C in the first days to 18°C by the end. The sky is clear or mostly clear about 31% 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 Asahi's 8th-clearest and 2nd-windiest month. For the whole year in context, see Asahi's year-round climate.
- Daytime high
- 16°
- 8th warmest
- Overnight low
- 12°
- 5th coldest
- Rainfall
- 119 mm
- 12.6 wet days
- Daylight
- 12 h 54 min
- 5:11 AM – 6:05 PM
- Cloud cover
- 61%
- 8th clearest
- Wind
- 19 km/h
- 2nd windiest
- Solar energy
- 5.07 kWh/m²
- Travel score
- 4.8
- out of 10
Asahi is city in Chiba Prefecture, Japan.
- Density
- 496/km²
- people per km²
- Founded
- 2005
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in April
Highs climb over the month, from about 15°C in the first days to 18°C by the end.
A typical April day in Asahi reaches about 16°C in the afternoon and slips back to 12°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 13°C and 20°C. Set against its neighbours, April runs about 4°C warmer than March and about 4°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) | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 18 | 18 |
| Avg low (°C) | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 14 | 10 |
| 2 | 14 | 10 |
| 3 | 15 | 10 |
| 4 | 15 | 10 |
| 5 | 15 | 10 |
| 6 | 15 | 10 |
| 7 | 15 | 11 |
| 8 | 15 | 11 |
| 9 | 15 | 11 |
| 10 | 16 | 11 |
| 11 | 16 | 11 |
| 12 | 16 | 11 |
| 13 | 16 | 12 |
| 14 | 16 | 12 |
| 15 | 16 | 12 |
| 16 | 16 | 12 |
| 17 | 17 | 12 |
| 18 | 17 | 12 |
| 19 | 17 | 13 |
| 20 | 17 | 13 |
| 21 | 17 | 13 |
| 22 | 17 | 13 |
| 23 | 17 | 13 |
| 24 | 17 | 13 |
| 25 | 18 | 13 |
| 26 | 18 | 14 |
| 27 | 18 | 14 |
| 28 | 18 | 14 |
| 29 | 18 | 14 |
| 30 | 18 | 14 |
Asahi weather by month
How April compares with the rest of the year at a glance. April is the 8th-warmest and 8th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 10° / 5° | 94 | 9.3 | 9.9 | 2.2 |
| Feb | 10° / 5° | 87 | 9.6 | 10.6 | 2.2 |
| Mar | 12° / 8° | 142 | 13.7 | 11.7 | 3.1 |
| Apr | 16° / 12° | 119 | 12.6 | 12.9 | 4.8 |
| May | 20° / 16° | 134 | 11.9 | 13.9 | 5.9 |
| Jun | 23° / 20° | 165 | 12.9 | 14.4 | 5.9 |
| Jul | 26° / 23° | 133 | 12 | 14.2 | 6.2 |
| Aug | 28° / 24° | 88 | 9.9 | 13.4 | 6.3 |
| Sep | 25° / 22° | 170 | 13.1 | 12.2 | 6.1 |
| Oct | 21° / 18° | 226 | 13.9 | 11.1 | 5.9 |
| Nov | 17° / 13° | 122 | 11.8 | 10.1 | 5.1 |
| Dec | 12° / 8° | 91 | 10 | 9.6 | 3.4 |
Cloud cover in April
The sky is clear or mostly clear about 31% of the time in April.
Beyond those clear spells, partly cloudy skies cover about 14% of April, with mostly cloudy or overcast conditions the remaining 56%.
| 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 (%) | 46 | 46 | 45 | 46 | 45 | 45 | 46 | 46 | 46 | 45 | 45 | 45 | 44 | 44 | 44 | 43 | 43 | 43 | 44 | 43 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 | 44 |
| Cloudier (%) | 54 | 54 | 55 | 54 | 55 | 55 | 54 | 54 | 54 | 55 | 55 | 55 | 56 | 56 | 56 | 57 | 57 | 57 | 56 | 57 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 | 56 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 46 | 54 |
| 2 | 46 | 54 |
| 3 | 45 | 55 |
| 4 | 46 | 54 |
| 5 | 45 | 55 |
| 6 | 45 | 55 |
| 7 | 46 | 54 |
| 8 | 46 | 54 |
| 9 | 46 | 54 |
| 10 | 45 | 55 |
| 11 | 45 | 55 |
| 12 | 45 | 55 |
| 13 | 44 | 56 |
| 14 | 44 | 56 |
| 15 | 44 | 56 |
| 16 | 43 | 57 |
| 17 | 43 | 57 |
| 18 | 43 | 57 |
| 19 | 44 | 56 |
| 20 | 43 | 57 |
| 21 | 44 | 56 |
| 22 | 44 | 56 |
| 23 | 44 | 56 |
| 24 | 44 | 56 |
| 25 | 44 | 56 |
| 26 | 44 | 56 |
| 27 | 44 | 56 |
| 28 | 44 | 56 |
| 29 | 44 | 56 |
| 30 | 44 | 56 |
Chance of precipitation in April
Asahi gets around 119 mm of rain over 12.6 wet days in April. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 42% and peaks near 44% on the wettest days.
| 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 (%) | 44 | 44 | 44 | 44 | 44 | 44 | 43 | 43 | 43 | 43 | 42 | 42 | 42 | 42 | 42 | 42 | 42 | 42 | 42 | 41 | 41 | 41 | 41 | 40 | 40 | 40 | 39 | 39 | 38 | 38 |
| Rain chance (%) | |
|---|---|
| 1 | 44 |
| 2 | 44 |
| 3 | 44 |
| 4 | 44 |
| 5 | 44 |
| 6 | 44 |
| 7 | 43 |
| 8 | 43 |
| 9 | 43 |
| 10 | 43 |
| 11 | 42 |
| 12 | 42 |
| 13 | 42 |
| 14 | 42 |
| 15 | 42 |
| 16 | 42 |
| 17 | 42 |
| 18 | 42 |
| 19 | 42 |
| 20 | 41 |
| 21 | 41 |
| 22 | 41 |
| 23 | 41 |
| 24 | 40 |
| 25 | 40 |
| 26 | 40 |
| 27 | 39 |
| 28 | 39 |
| 29 | 38 |
| 30 | 38 |
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 82% 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 (%) | 96 | 95 | 94 | 94 | 93 | 92 | 91 | 91 | 90 | 89 | 89 | 88 | 86 | 85 | 85 | 84 | 83 | 82 | 79 | 78 | 77 | 76 | 74 | 72 | 70 | 68 | 65 | 64 | 62 | 60 |
| Comfortable (%) | 3 | 4 | 5 | 5 | 6 | 7 | 8 | 8 | 9 | 10 | 10 | 11 | 12 | 13 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 23 | 24 | 25 | 27 | 28 | 29 | 30 |
| Humid (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 4 | 4 | 5 | 6 | 7 | 7 | 8 | 9 |
| Muggy (%) | 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 | 1 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 96 | 3 | 1 | 0 |
| 2 | 95 | 4 | 1 | 0 |
| 3 | 94 | 5 | 1 | 0 |
| 4 | 94 | 5 | 1 | 0 |
| 5 | 93 | 6 | 1 | 0 |
| 6 | 92 | 7 | 1 | 0 |
| 7 | 91 | 8 | 1 | 0 |
| 8 | 91 | 8 | 1 | 0 |
| 9 | 90 | 9 | 1 | 0 |
| 10 | 89 | 10 | 1 | 0 |
| 11 | 89 | 10 | 1 | 0 |
| 12 | 88 | 11 | 1 | 0 |
| 13 | 86 | 12 | 2 | 0 |
| 14 | 85 | 13 | 2 | 0 |
| 15 | 85 | 13 | 2 | 0 |
| 16 | 84 | 14 | 2 | 0 |
| 17 | 83 | 15 | 2 | 0 |
| 18 | 82 | 16 | 2 | 0 |
| 19 | 79 | 17 | 3 | 1 |
| 20 | 78 | 18 | 3 | 1 |
| 21 | 77 | 19 | 3 | 1 |
| 22 | 76 | 20 | 3 | 1 |
| 23 | 74 | 21 | 4 | 1 |
| 24 | 72 | 23 | 4 | 1 |
| 25 | 70 | 24 | 5 | 1 |
| 26 | 68 | 25 | 6 | 1 |
| 27 | 65 | 27 | 7 | 1 |
| 28 | 64 | 28 | 7 | 1 |
| 29 | 62 | 29 | 8 | 1 |
| 30 | 60 | 30 | 9 | 1 |
Wind in April
Winds average 19 km/h in April.
Across April, daily wind ranges from about 19 km/h on the calmest days to 20 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) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 20 | light breeze |
| 2 | 20 | light breeze |
| 3 | 20 | light breeze |
| 4 | 20 | light breeze |
| 5 | 20 | light breeze |
| 6 | 20 | light breeze |
| 7 | 20 | light breeze |
| 8 | 20 | light breeze |
| 9 | 20 | light breeze |
| 10 | 20 | light breeze |
| 11 | 20 | light breeze |
| 12 | 20 | light breeze |
| 13 | 20 | light breeze |
| 14 | 20 | light breeze |
| 15 | 20 | light breeze |
| 16 | 19 | light breeze |
| 17 | 19 | light breeze |
| 18 | 19 | light breeze |
| 19 | 19 | light breeze |
| 20 | 19 | light breeze |
| 21 | 19 | light breeze |
| 22 | 19 | light breeze |
| 23 | 19 | light breeze |
| 24 | 19 | light breeze |
| 25 | 19 | light breeze |
| 26 | 19 | light breeze |
| 27 | 19 | light breeze |
| 28 | 19 | light breeze |
| 29 | 19 | light breeze |
| 30 | 19 | light breeze |
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 5:32 AM to 4:53 AM, and sunset from 5:52 PM to 6:17 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 | 12.6 | 12.7 | 12.7 | 12.8 | 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 |
| Sunrise (AM) | 5:32 | 5:30 | 5:29 | 5:28 | 5:26 | 5:25 | 5:23 | 5:22 | 5:20 | 5:19 | 5:17 | 5:16 | 5:15 | 5:13 | 5:12 | 5:11 | 5:09 | 5:08 | 5:06 | 5:05 | 5:04 | 5:03 | 5:01 | 5:00 | 4:59 | 4:58 | 4:56 | 4:55 | 4:54 | 4:53 |
| Sunset (PM) | 5:52 | 5:53 | 5:54 | 5:55 | 5:56 | 5:56 | 5:57 | 5:58 | 5:59 | 6:00 | 6:01 | 6:01 | 6:02 | 6:03 | 6:04 | 6:05 | 6:06 | 6:06 | 6:07 | 6:08 | 6:09 | 6:10 | 6:11 | 6:12 | 6:12 | 6:13 | 6:14 | 6:15 | 6:16 | 6:17 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.3 | 5:32 | 5:52 |
| 2 | 12.4 | 5:30 | 5:53 |
| 3 | 12.4 | 5:29 | 5:54 |
| 4 | 12.5 | 5:28 | 5:55 |
| 5 | 12.5 | 5:26 | 5:56 |
| 6 | 12.5 | 5:25 | 5:56 |
| 7 | 12.6 | 5:23 | 5:57 |
| 8 | 12.6 | 5:22 | 5:58 |
| 9 | 12.6 | 5:20 | 5:59 |
| 10 | 12.7 | 5:19 | 6:00 |
| 11 | 12.7 | 5:17 | 6:01 |
| 12 | 12.8 | 5:16 | 6:01 |
| 13 | 12.8 | 5:15 | 6:02 |
| 14 | 12.8 | 5:13 | 6:03 |
| 15 | 12.9 | 5:12 | 6:04 |
| 16 | 12.9 | 5:11 | 6:05 |
| 17 | 12.9 | 5:09 | 6:06 |
| 18 | 13.0 | 5:08 | 6:06 |
| 19 | 13.0 | 5:06 | 6:07 |
| 20 | 13.0 | 5:05 | 6:08 |
| 21 | 13.1 | 5:04 | 6:09 |
| 22 | 13.1 | 5:03 | 6:10 |
| 23 | 13.2 | 5:01 | 6:11 |
| 24 | 13.2 | 5:00 | 6:12 |
| 25 | 13.2 | 4:59 | 6:12 |
| 26 | 13.3 | 4:58 | 6:13 |
| 27 | 13.3 | 4:56 | 6:14 |
| 28 | 13.3 | 4:55 | 6:15 |
| 29 | 13.4 | 4:54 | 6:16 |
| 30 | 13.4 | 4:53 | 6:17 |
Solar energy in April
Average shortwave solar energy reaching the ground each day in April, about 5.07 kWh/m².
For context, solar energy here swings from a low near 2.28 kWh/m² to a high of 5.54 kWh/m² in May across the year — April's 5.07 kWh/m² falls in the middle.
| 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) | 4.7 | 4.7 | 4.7 | 4.7 | 4.8 | 4.8 | 4.8 | 4.8 | 4.9 | 4.9 | 4.9 | 4.9 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.1 | 5.1 | 5.1 | 5.2 | 5.2 | 5.3 | 5.3 | 5.3 | 5.3 | 5.4 | 5.4 | 5.4 | 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 | 4.7 | Bright |
| 2 | 4.7 | Bright |
| 3 | 4.7 | Bright |
| 4 | 4.7 | Bright |
| 5 | 4.8 | Bright |
| 6 | 4.8 | Bright |
| 7 | 4.8 | Bright |
| 8 | 4.8 | Bright |
| 9 | 4.9 | Bright |
| 10 | 4.9 | Bright |
| 11 | 4.9 | Bright |
| 12 | 4.9 | Bright |
| 13 | 5.0 | Bright |
| 14 | 5.0 | Bright |
| 15 | 5.0 | Bright |
| 16 | 5.0 | Bright |
| 17 | 5.0 | Bright |
| 18 | 5.1 | Bright |
| 19 | 5.1 | Bright |
| 20 | 5.1 | Bright |
| 21 | 5.2 | Bright |
| 22 | 5.2 | Bright |
| 23 | 5.3 | Bright |
| 24 | 5.3 | Bright |
| 25 | 5.3 | Bright |
| 26 | 5.3 | Bright |
| 27 | 5.4 | Bright |
| 28 | 5.4 | Bright |
| 29 | 5.4 | Bright |
| 30 | 5.5 | Bright |
Hazard calendar for Asahi
In April, Asahi sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Asahi sits in the Pacific typhoon belt; the season peaks July–October.
Is April a good time to visit Asahi?
Our two travel scores rate April for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
April is a reasonable time to visit Asahi for sightseeing.
What to pack for Asahi in April
From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In April, Asahi sees daytime highs around 16°C and nights near 12°C. Worth packing: a warm layer, rain gear and sun protection. About 13 days see rain.
Sea temperature near Asahi in April
The nearest coast averages about 16°C in April — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in August at about 25°C and coldest in February near 15°C.
It's comfortable for a long swim from Jun 5 to Nov 22 — about 5.6 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 16 | 15 | 15 | 16 | 19 | 21 | 23 | 25 | 25 | 23 | 21 | 18 |
| Comfort | Cool | Bracing | Cool | Cool | Cool | Refreshing | Refreshing | Warm | Warm | Refreshing | Refreshing | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 16 | Cool |
| Feb | 15 | Bracing |
| Mar | 15 | Cool |
| Apr | 16 | Cool |
| May | 19 | Cool |
| Jun | 21 | Refreshing |
| Jul | 23 | Refreshing |
| Aug | 25 | Warm |
| Sep | 25 | Warm |
| Oct | 23 | Refreshing |
| Nov | 21 | Refreshing |
| Dec | 18 | Cool |
UV index in Asahi in April
Clear-sky midday UV in April peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Asahi peaks around August 12 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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) | 2 | 4 | 4 | 7 | 8 | 9 | 10 | 10 | 8 | 6 | 4 | 2 |
| Level | Moderate | Moderate | Moderate | High | Very high | Very high | Very high | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 4 | Moderate |
| Mar | 4 | Moderate |
| Apr | 7 | High |
| May | 8 | Very high |
| Jun | 9 | Very high |
| Jul | 10 | Very high |
| Aug | 10 | Extreme |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 2 | Moderate |
Air quality in Asahi 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 Asahi is worst in April — around 20 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (December, 7 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) | 9 | 11 | 18 | 20 | 19 | 14 | 12 | 11 | 10 | 10 | 9 | 7 |
| Level | Good | Good | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 9 | Good |
| Feb | 11 | Good |
| Mar | 18 | Moderate |
| Apr | 20 | Moderate |
| May | 19 | Moderate |
| Jun | 14 | Moderate |
| Jul | 12 | Good |
| Aug | 11 | Good |
| Sep | 10 | Good |
| Oct | 10 | Good |
| Nov | 9 | Good |
| Dec | 7 | Good |
Where is Asahi?
Asahi sits at 35.7°N, 140.7°E, 5 m above sea level, in Japan. The nearest listed city is Sōsa, 9.0 km away.
Topography around Asahi
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Asahi.
Within 3 km, the terrain around Asahi has only modest variations in elevation — a maximum elevation change of 19 m around an average of 7 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 71 m; within 80 km, large variations in elevation — a maximum elevation change of 840 m.
The land around Asahi is covered by cropland (41%) and artificial surfaces (39%) within 3 km, water (34%), cropland (27%) and trees (22%) within 16 km, and water (44%) and trees (24%) 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 Asahi (35.7167°, 140.65°, elevation 5 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).