Asahikawa weather in September
In September, Asahikawa sees average daytime highs of 20°C and overnight lows near 12°C, with 143 mm of rain across 14.4 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.
Highs ease over the month, from about 23°C in the first days to 18°C by the end. The sky is clear or mostly clear about 20% of the time in September, and the air most often feels dry.
Daylight stretches from about 13 h 06 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Asahikawa's 3rd-clearest and 9th-windiest month. For the whole year in context, see Asahikawa's year-round climate.
- Daytime high
- 20°
- 3rd warmest
- Overnight low
- 12°
- 9th coldest
- Rainfall
- 143 mm
- 14.4 wet days
- Daylight
- 12 h 18 min
- 5:16 AM – 5:34 PM
- Cloud cover
- 67%
- 3rd clearest
- Wind
- 8 km/h
- 9th windiest
- Solar energy
- 3.55 kWh/m²
- Travel score
- 5.6
- out of 10
Asahikawa is city in Hokkaido, Japan.
- Density
- 446/km²
- people per km²
- Founded
- 1877
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Highs ease over the month, from about 23°C in the first days to 18°C by the end.
A typical September day in Asahikawa reaches about 20°C in the afternoon and slips back to 12°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 17°C and 24°C. Set against its neighbours, September runs about 4°C cooler than August and about 7°C warmer than October.
| 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) | 23 | 23 | 23 | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 17 |
| Avg low (°C) | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 8 | 8 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 23 | 15 |
| 2 | 23 | 15 |
| 3 | 23 | 15 |
| 4 | 23 | 14 |
| 5 | 23 | 14 |
| 6 | 22 | 14 |
| 7 | 22 | 14 |
| 8 | 22 | 14 |
| 9 | 22 | 13 |
| 10 | 22 | 13 |
| 11 | 21 | 13 |
| 12 | 21 | 13 |
| 13 | 21 | 12 |
| 14 | 21 | 12 |
| 15 | 21 | 12 |
| 16 | 20 | 12 |
| 17 | 20 | 11 |
| 18 | 20 | 11 |
| 19 | 20 | 11 |
| 20 | 20 | 10 |
| 21 | 19 | 10 |
| 22 | 19 | 10 |
| 23 | 19 | 10 |
| 24 | 19 | 9 |
| 25 | 19 | 9 |
| 26 | 18 | 9 |
| 27 | 18 | 9 |
| 28 | 18 | 9 |
| 29 | 18 | 8 |
| 30 | 17 | 8 |
How September really feels in Asahikawa
Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Asahikawa weather by month
How September compares with the rest of the year at a glance. September is the 3rd-warmest and 3rd-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | -4° / -12° | 57 | 15 | 20.4 | 9.1 | 0.0 |
| Feb | -2° / -11° | 50 | 13 | 17.1 | 10.2 | 0.0 |
| Mar | 2° / -6° | 67 | 14.9 | 15.7 | 11.6 | 0.0 |
| Apr | 10° / 1° | 77 | 13.6 | 5.8 | 13.2 | 2.1 |
| May | 16° / 7° | 91 | 13 | 0.4 | 14.5 | 4.8 |
| Jun | 20° / 12° | 90 | 12.4 | 0 | 15.2 | 5.8 |
| Jul | 24° / 16° | 147 | 14.4 | 0 | 14.9 | 6.0 |
| Aug | 24° / 17° | 171 | 15 | 0 | 13.8 | 5.9 |
| Sep | 20° / 12° | 143 | 14.4 | 0 | 12.3 | 5.6 |
| Oct | 14° / 5° | 115 | 15.6 | 1.2 | 10.8 | 3.5 |
| Nov | 6° / -2° | 107 | 18.4 | 12.3 | 9.5 | 0.5 |
| Dec | -1° / -9° | 83 | 17.3 | 21.7 | 8.8 | 0.0 |
Cloud cover in September
The sky is clear or mostly clear about 20% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 61%.
| 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 (%) | 35 | 35 | 36 | 36 | 36 | 36 | 36 | 37 | 37 | 37 | 37 | 37 | 39 | 39 | 38 | 39 | 39 | 40 | 40 | 41 | 41 | 41 | 41 | 42 | 43 | 42 | 43 | 43 | 43 | 42 |
| Cloudier (%) | 65 | 65 | 64 | 64 | 64 | 64 | 64 | 63 | 63 | 63 | 63 | 63 | 61 | 61 | 62 | 61 | 61 | 60 | 60 | 59 | 59 | 59 | 59 | 58 | 57 | 58 | 57 | 57 | 57 | 58 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 35 | 65 |
| 2 | 35 | 65 |
| 3 | 36 | 64 |
| 4 | 36 | 64 |
| 5 | 36 | 64 |
| 6 | 36 | 64 |
| 7 | 36 | 64 |
| 8 | 37 | 63 |
| 9 | 37 | 63 |
| 10 | 37 | 63 |
| 11 | 37 | 63 |
| 12 | 37 | 63 |
| 13 | 39 | 61 |
| 14 | 39 | 61 |
| 15 | 38 | 62 |
| 16 | 39 | 61 |
| 17 | 39 | 61 |
| 18 | 40 | 60 |
| 19 | 40 | 60 |
| 20 | 41 | 59 |
| 21 | 41 | 59 |
| 22 | 41 | 59 |
| 23 | 41 | 59 |
| 24 | 42 | 58 |
| 25 | 43 | 57 |
| 26 | 42 | 58 |
| 27 | 43 | 57 |
| 28 | 43 | 57 |
| 29 | 43 | 57 |
| 30 | 42 | 58 |
Chance of precipitation in September
Asahikawa gets around 143 mm of rain over 14.4 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 48% and peaks near 50% 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 (%) | 48 | 49 | 49 | 49 | 49 | 49 | 49 | 49 | 48 | 48 | 48 | 48 | 48 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | 48 | 48 | 48 | 49 | 49 | 49 | 50 | 50 |
| Rain chance (%) | |
|---|---|
| 1 | 48 |
| 2 | 49 |
| 3 | 49 |
| 4 | 49 |
| 5 | 49 |
| 6 | 49 |
| 7 | 49 |
| 8 | 49 |
| 9 | 48 |
| 10 | 48 |
| 11 | 48 |
| 12 | 48 |
| 13 | 48 |
| 14 | 47 |
| 15 | 47 |
| 16 | 47 |
| 17 | 47 |
| 18 | 47 |
| 19 | 47 |
| 20 | 47 |
| 21 | 47 |
| 22 | 47 |
| 23 | 48 |
| 24 | 48 |
| 25 | 48 |
| 26 | 49 |
| 27 | 49 |
| 28 | 49 |
| 29 | 50 |
| 30 | 50 |
Humidity in September
Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the dry band about 56% of days. Sticky, muggy-or-worse air turns up on roughly 6% of them.
| 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 (%) | 21 | 22 | 24 | 26 | 28 | 30 | 32 | 35 | 37 | 40 | 43 | 46 | 49 | 51 | 55 | 59 | 61 | 65 | 67 | 70 | 73 | 76 | 78 | 80 | 83 | 84 | 85 | 88 | 89 | 90 |
| Comfortable (%) | 32 | 33 | 34 | 34 | 35 | 35 | 35 | 35 | 35 | 34 | 34 | 33 | 32 | 31 | 30 | 28 | 27 | 25 | 24 | 22 | 20 | 18 | 17 | 16 | 14 | 13 | 12 | 11 | 10 | 9 |
| Humid (%) | 30 | 29 | 28 | 27 | 25 | 23 | 22 | 20 | 19 | 17 | 16 | 14 | 13 | 12 | 10 | 9 | 8 | 7 | 6 | 5 | 5 | 4 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 |
| Muggy (%) | 16 | 15 | 14 | 13 | 12 | 12 | 11 | 10 | 9 | 8 | 8 | 7 | 6 | 6 | 5 | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 0 | 0 | 0 |
| Oppressive (%) | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 21 | 32 | 30 | 16 | 1 |
| 2 | 22 | 33 | 29 | 15 | 1 |
| 3 | 24 | 34 | 28 | 14 | 0 |
| 4 | 26 | 34 | 27 | 13 | 0 |
| 5 | 28 | 35 | 25 | 12 | 0 |
| 6 | 30 | 35 | 23 | 12 | 0 |
| 7 | 32 | 35 | 22 | 11 | 0 |
| 8 | 35 | 35 | 20 | 10 | 0 |
| 9 | 37 | 35 | 19 | 9 | 0 |
| 10 | 40 | 34 | 17 | 8 | 0 |
| 11 | 43 | 34 | 16 | 8 | 0 |
| 12 | 46 | 33 | 14 | 7 | 0 |
| 13 | 49 | 32 | 13 | 6 | 0 |
| 14 | 51 | 31 | 12 | 6 | 0 |
| 15 | 55 | 30 | 10 | 5 | 0 |
| 16 | 59 | 28 | 9 | 4 | 0 |
| 17 | 61 | 27 | 8 | 4 | 0 |
| 18 | 65 | 25 | 7 | 3 | 0 |
| 19 | 67 | 24 | 6 | 3 | 0 |
| 20 | 70 | 22 | 5 | 3 | 0 |
| 21 | 73 | 20 | 5 | 2 | 0 |
| 22 | 76 | 18 | 4 | 2 | 0 |
| 23 | 78 | 17 | 3 | 2 | 0 |
| 24 | 80 | 16 | 3 | 1 | 0 |
| 25 | 83 | 14 | 2 | 1 | 0 |
| 26 | 84 | 13 | 2 | 1 | 0 |
| 27 | 85 | 12 | 2 | 1 | 0 |
| 28 | 88 | 11 | 1 | 0 | 0 |
| 29 | 89 | 10 | 1 | 0 | 0 |
| 30 | 90 | 9 | 1 | 0 | 0 |
Wind in September
Winds average 8 km/h in September.
Across September, daily wind ranges from about 7 km/h on the calmest days to 8 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) | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 |
| 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 | 7 | calm |
| 2 | 7 | calm |
| 3 | 7 | calm |
| 4 | 7 | calm |
| 5 | 7 | calm |
| 6 | 7 | calm |
| 7 | 7 | calm |
| 8 | 7 | calm |
| 9 | 7 | calm |
| 10 | 7 | calm |
| 11 | 7 | calm |
| 12 | 7 | calm |
| 13 | 7 | calm |
| 14 | 8 | calm |
| 15 | 8 | calm |
| 16 | 8 | calm |
| 17 | 8 | calm |
| 18 | 8 | calm |
| 19 | 8 | calm |
| 20 | 8 | calm |
| 21 | 8 | calm |
| 22 | 8 | calm |
| 23 | 8 | calm |
| 24 | 8 | calm |
| 25 | 8 | calm |
| 26 | 8 | calm |
| 27 | 8 | calm |
| 28 | 8 | calm |
| 29 | 8 | calm |
| 30 | 8 | calm |
Sunrise & sunset in September
Daylight runs from about 13 h 06 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 90 minutes over September. Sunrise moves from 4:59 AM to 5:33 AM, and sunset from 6:02 PM to 5:07 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) | 13.1 | 13.0 | 13.0 | 12.9 | 12.9 | 12.8 | 12.8 | 12.7 | 12.7 | 12.6 | 12.6 | 12.5 | 12.5 | 12.4 | 12.3 | 12.3 | 12.2 | 12.2 | 12.1 | 12.1 | 12.0 | 12.0 | 11.9 | 11.9 | 11.8 | 11.8 | 11.7 | 11.7 | 11.6 | 11.6 |
| Sunrise (AM) | 4:59 | 5:00 | 5:01 | 5:02 | 5:03 | 5:04 | 5:05 | 5:07 | 5:08 | 5:09 | 5:10 | 5:11 | 5:12 | 5:14 | 5:15 | 5:16 | 5:17 | 5:18 | 5:19 | 5:21 | 5:22 | 5:23 | 5:24 | 5:25 | 5:27 | 5:28 | 5:29 | 5:30 | 5:31 | 5:33 |
| Sunset (PM) | 6:02 | 6:00 | 5:58 | 5:56 | 5:55 | 5:53 | 5:51 | 5:49 | 5:47 | 5:45 | 5:43 | 5:41 | 5:39 | 5:38 | 5:36 | 5:34 | 5:32 | 5:30 | 5:28 | 5:26 | 5:24 | 5:22 | 5:20 | 5:18 | 5:17 | 5:15 | 5:13 | 5:11 | 5:09 | 5:07 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.1 | 4:59 | 6:02 |
| 2 | 13.0 | 5:00 | 6:00 |
| 3 | 13.0 | 5:01 | 5:58 |
| 4 | 12.9 | 5:02 | 5:56 |
| 5 | 12.9 | 5:03 | 5:55 |
| 6 | 12.8 | 5:04 | 5:53 |
| 7 | 12.8 | 5:05 | 5:51 |
| 8 | 12.7 | 5:07 | 5:49 |
| 9 | 12.7 | 5:08 | 5:47 |
| 10 | 12.6 | 5:09 | 5:45 |
| 11 | 12.6 | 5:10 | 5:43 |
| 12 | 12.5 | 5:11 | 5:41 |
| 13 | 12.5 | 5:12 | 5:39 |
| 14 | 12.4 | 5:14 | 5:38 |
| 15 | 12.3 | 5:15 | 5:36 |
| 16 | 12.3 | 5:16 | 5:34 |
| 17 | 12.2 | 5:17 | 5:32 |
| 18 | 12.2 | 5:18 | 5:30 |
| 19 | 12.1 | 5:19 | 5:28 |
| 20 | 12.1 | 5:21 | 5:26 |
| 21 | 12.0 | 5:22 | 5:24 |
| 22 | 12.0 | 5:23 | 5:22 |
| 23 | 11.9 | 5:24 | 5:20 |
| 24 | 11.9 | 5:25 | 5:18 |
| 25 | 11.8 | 5:27 | 5:17 |
| 26 | 11.8 | 5:28 | 5:15 |
| 27 | 11.7 | 5:29 | 5:13 |
| 28 | 11.7 | 5:30 | 5:11 |
| 29 | 11.6 | 5:31 | 5:09 |
| 30 | 11.6 | 5:33 | 5:07 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 3.55 kWh/m².
For context, solar energy here swings from a low near 1.53 kWh/m² to a high of 5.25 kWh/m² in May across the year — September's 3.55 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) | 3.9 | 3.9 | 3.9 | 3.8 | 3.8 | 3.8 | 3.8 | 3.7 | 3.7 | 3.7 | 3.6 | 3.6 | 3.6 | 3.6 | 3.5 | 3.5 | 3.5 | 3.5 | 3.5 | 3.4 | 3.4 | 3.4 | 3.4 | 3.3 | 3.3 | 3.3 | 3.2 | 3.2 | 3.2 | 3.1 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 3.9 | Moderate |
| 2 | 3.9 | Moderate |
| 3 | 3.9 | Moderate |
| 4 | 3.8 | Moderate |
| 5 | 3.8 | Moderate |
| 6 | 3.8 | Moderate |
| 7 | 3.8 | Moderate |
| 8 | 3.7 | Moderate |
| 9 | 3.7 | Moderate |
| 10 | 3.7 | Moderate |
| 11 | 3.6 | Moderate |
| 12 | 3.6 | Moderate |
| 13 | 3.6 | Moderate |
| 14 | 3.6 | Moderate |
| 15 | 3.5 | Moderate |
| 16 | 3.5 | Moderate |
| 17 | 3.5 | Moderate |
| 18 | 3.5 | Moderate |
| 19 | 3.5 | Moderate |
| 20 | 3.4 | Moderate |
| 21 | 3.4 | Moderate |
| 22 | 3.4 | Moderate |
| 23 | 3.4 | Moderate |
| 24 | 3.3 | Moderate |
| 25 | 3.3 | Moderate |
| 26 | 3.3 | Moderate |
| 27 | 3.2 | Moderate |
| 28 | 3.2 | Moderate |
| 29 | 3.2 | Moderate |
| 30 | 3.1 | Moderate |
Is September a good time to visit Asahikawa?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a reasonable time to visit Asahikawa for sightseeing.
What to pack for Asahikawa in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Asahikawa sees daytime highs around 20°C and nights near 12°C. Pack rain gear. About 14 days see rain.
Sea temperature near Asahikawa in September
The nearest coast averages about 21°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 60 km away) is warmest in August at about 21°C and coldest in February near 5°C.
It's comfortable for a long swim from Aug 3 to Sep 20 — about 1.6 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 6 | 5 | 5 | 7 | 10 | 14 | 18 | 21 | 21 | 17 | 13 | 9 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Refreshing | Cool | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 6 | Bracing |
| Feb | 5 | Bracing |
| Mar | 5 | Bracing |
| Apr | 7 | Bracing |
| May | 10 | Bracing |
| Jun | 14 | Bracing |
| Jul | 18 | Cool |
| Aug | 21 | Refreshing |
| Sep | 21 | Refreshing |
| Oct | 17 | Cool |
| Nov | 13 | Bracing |
| Dec | 9 | Bracing |
UV index in Asahikawa in September
Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Asahikawa peaks around August 16 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 3 | 6 | 7 | 7 | 6 | 9 | 6 | 4 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | Very high | Very high | High | Very high | High | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Moderate |
| Mar | 3 | Moderate |
| Apr | 6 | High |
| May | 7 | Very high |
| Jun | 7 | Very high |
| Jul | 6 | High |
| Aug | 9 | Very high |
| Sep | 6 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Air quality in Asahikawa in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Asahikawa is worst in April — around 17 µg/m³ PM2.5 (moderate), about 2.3× 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) | 8 | 11 | 16 | 17 | 15 | 11 | 11 | 9 | 8 | 9 | 9 | 7 |
| Level | Good | Good | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 11 | Good |
| Mar | 16 | Moderate |
| Apr | 17 | Moderate |
| May | 15 | Moderate |
| Jun | 11 | Good |
| Jul | 11 | Good |
| Aug | 9 | Good |
| Sep | 8 | Good |
| Oct | 9 | Good |
| Nov | 9 | Good |
| Dec | 7 | Good |
Where is Asahikawa?
Asahikawa sits at 43.8°N, 142.4°E, 121 m above sea level, in Japan. The nearest listed city is Fukagawa, 27 km away.
Topography around Asahikawa
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Asahikawa.
Within 3 km, the terrain around Asahikawa has only modest variations in elevation — a maximum elevation change of 64 m around an average of 115 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 755 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,253 m.
The land around Asahikawa is covered by artificial surfaces (77%) within 3 km, trees (51%) and cropland (31%) within 16 km, and trees (81%) 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 Asahikawa (43.7706°, 142.3649°, elevation 121 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. 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).