Shiraoi weather in August
In August, Shiraoi sees average daytime highs of 22°C and overnight lows near 18°C, with 194 mm of rain across 13.9 wet days and about 13.7 hours of daylight. It is the 1st-warmest and 1st-wettest month of the year here.
Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 17% of the time in August, and the air most often feels humid.
Daylight stretches from about 14 h 18 min at the start of August to 13 h 06 min by month's end. Set against the rest of the year, August is Shiraoi's 11th-clearest and 10th-windiest month. For the whole year in context, see Shiraoi's year-round climate.
- Daytime high
- 22°
- 1st warmest
- Overnight low
- 18°
- 12th coldest
- Rainfall
- 194 mm
- 13.9 wet days
- Daylight
- 13 h 42 min
- 4:46 AM – 6:31 PM
- Cloud cover
- 73%
- 11th clearest
- Wind
- 10 km/h
- 10th windiest
- Solar energy
- 4.37 kWh/m²
- Travel score
- 5.8
- out of 10
Shiraoi is town in Shiraoi district, Hokkaidō, Japan.
- Density
- 42/km²
- people per km²
- Founded
- 1954
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in August
Day-to-day highs hold fairly steady near 22°C through the month.
A typical August day in Shiraoi reaches about 22°C in the afternoon and slips back to 18°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 25°C. Set against its neighbours, August runs about 2°C warmer than July and about 2°C warmer than September.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
| Avg low (°C) | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 17 | 17 | 17 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 22 | 18 |
| 2 | 22 | 18 |
| 3 | 22 | 18 |
| 4 | 22 | 18 |
| 5 | 22 | 18 |
| 6 | 22 | 18 |
| 7 | 22 | 18 |
| 8 | 22 | 18 |
| 9 | 22 | 18 |
| 10 | 22 | 18 |
| 11 | 22 | 18 |
| 12 | 22 | 18 |
| 13 | 22 | 18 |
| 14 | 22 | 18 |
| 15 | 22 | 18 |
| 16 | 22 | 18 |
| 17 | 22 | 18 |
| 18 | 22 | 18 |
| 19 | 22 | 18 |
| 20 | 22 | 18 |
| 21 | 22 | 18 |
| 22 | 22 | 18 |
| 23 | 22 | 18 |
| 24 | 22 | 18 |
| 25 | 22 | 18 |
| 26 | 22 | 18 |
| 27 | 22 | 18 |
| 28 | 22 | 18 |
| 29 | 22 | 17 |
| 30 | 22 | 17 |
| 31 | 22 | 17 |
How August really feels in Shiraoi
Once humidity and wind are folded in, August 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.
August sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Shiraoi weather by month
How August compares with the rest of the year at a glance. August is the 1st-warmest and 1st-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° / -7° | 47 | 7.1 | 8.2 | 9.2 | 0.0 |
| Feb | -1° / -7° | 45 | 6.9 | 7.7 | 10.3 | 0.0 |
| Mar | 2° / -4° | 64 | 9.8 | 8.7 | 11.6 | 0.0 |
| Apr | 7° / 2° | 82 | 10.8 | 3.1 | 13.1 | 0.9 |
| May | 12° / 7° | 113 | 12.2 | 0.1 | 14.4 | 3.0 |
| Jun | 16° / 12° | 98 | 10.6 | 0 | 15.1 | 4.7 |
| Jul | 20° / 16° | 143 | 13.3 | 0 | 14.8 | 5.5 |
| Aug | 22° / 18° | 194 | 13.9 | 0 | 13.7 | 5.8 |
| Sep | 20° / 15° | 177 | 13.5 | 0 | 12.3 | 5.6 |
| Oct | 14° / 8° | 114 | 11.1 | 0.1 | 10.8 | 4.0 |
| Nov | 7° / 2° | 84 | 10.4 | 2.8 | 9.6 | 0.9 |
| Dec | 1° / -5° | 64 | 8.8 | 8.6 | 8.9 | 0.0 |
Cloud cover in August
The sky is clear or mostly clear about 17% of the time in August.
Beyond those clear spells, partly cloudy skies cover about 13% of August, with mostly cloudy or overcast conditions the remaining 71%.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 28 | 28 | 27 | 28 | 28 | 28 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 27 | 27 | 28 | 28 | 29 | 30 | 30 | 31 | 31 | 33 | 33 | 33 | 35 | 35 | 34 | 34 | 35 |
| Cloudier (%) | 72 | 72 | 73 | 72 | 72 | 72 | 73 | 73 | 73 | 73 | 73 | 74 | 74 | 74 | 73 | 73 | 72 | 72 | 71 | 70 | 70 | 69 | 69 | 67 | 67 | 67 | 65 | 65 | 66 | 66 | 65 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 28 | 72 |
| 2 | 28 | 72 |
| 3 | 27 | 73 |
| 4 | 28 | 72 |
| 5 | 28 | 72 |
| 6 | 28 | 72 |
| 7 | 27 | 73 |
| 8 | 27 | 73 |
| 9 | 27 | 73 |
| 10 | 27 | 73 |
| 11 | 27 | 73 |
| 12 | 26 | 74 |
| 13 | 26 | 74 |
| 14 | 26 | 74 |
| 15 | 27 | 73 |
| 16 | 27 | 73 |
| 17 | 28 | 72 |
| 18 | 28 | 72 |
| 19 | 29 | 71 |
| 20 | 30 | 70 |
| 21 | 30 | 70 |
| 22 | 31 | 69 |
| 23 | 31 | 69 |
| 24 | 33 | 67 |
| 25 | 33 | 67 |
| 26 | 33 | 67 |
| 27 | 35 | 65 |
| 28 | 35 | 65 |
| 29 | 34 | 66 |
| 30 | 34 | 66 |
| 31 | 35 | 65 |
Chance of precipitation in August
Shiraoi gets around 194 mm of rain over 13.9 wet days in August, the wettest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 46% and peaks near 47% 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 44 | 44 | 44 | 44 | 44 | 44 | 45 | 45 | 45 | 46 | 46 | 46 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 46 | 46 |
| Rain chance (%) | |
|---|---|
| 1 | 44 |
| 2 | 44 |
| 3 | 44 |
| 4 | 44 |
| 5 | 44 |
| 6 | 44 |
| 7 | 45 |
| 8 | 45 |
| 9 | 45 |
| 10 | 46 |
| 11 | 46 |
| 12 | 46 |
| 13 | 47 |
| 14 | 47 |
| 15 | 47 |
| 16 | 47 |
| 17 | 47 |
| 18 | 47 |
| 19 | 47 |
| 20 | 46 |
| 21 | 46 |
| 22 | 46 |
| 23 | 46 |
| 24 | 46 |
| 25 | 46 |
| 26 | 46 |
| 27 | 46 |
| 28 | 46 |
| 29 | 46 |
| 30 | 46 |
| 31 | 46 |
Humidity in August
Most of August feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the humid band about 37% of days. Sticky, muggy-or-worse air turns up on roughly 41% 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 7 | 7 | 8 | 8 | 9 |
| Comfortable (%) | 17 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 15 | 15 | 15 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 16 | 17 | 17 | 18 | 19 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| Humid (%) | 31 | 31 | 30 | 30 | 30 | 31 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 40 | 41 | 41 | 42 | 42 | 42 | 42 | 42 | 41 | 41 | 40 | 40 | 39 | 39 | 38 |
| Muggy (%) | 41 | 41 | 42 | 41 | 41 | 41 | 40 | 39 | 39 | 38 | 37 | 37 | 36 | 35 | 35 | 34 | 33 | 32 | 31 | 30 | 30 | 29 | 28 | 28 | 27 | 27 | 26 | 26 | 25 | 24 | 24 |
| Oppressive (%) | 8 | 8 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 4 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 3 | 17 | 31 | 41 | 8 |
| 2 | 3 | 17 | 31 | 41 | 8 |
| 3 | 3 | 16 | 30 | 42 | 9 |
| 4 | 3 | 16 | 30 | 41 | 9 |
| 5 | 3 | 16 | 30 | 41 | 10 |
| 6 | 3 | 16 | 31 | 41 | 10 |
| 7 | 3 | 16 | 31 | 40 | 10 |
| 8 | 3 | 16 | 32 | 39 | 10 |
| 9 | 3 | 16 | 33 | 39 | 10 |
| 10 | 3 | 15 | 34 | 38 | 10 |
| 11 | 3 | 15 | 35 | 37 | 10 |
| 12 | 3 | 15 | 36 | 37 | 10 |
| 13 | 3 | 14 | 37 | 36 | 9 |
| 14 | 3 | 14 | 38 | 35 | 9 |
| 15 | 3 | 14 | 39 | 35 | 9 |
| 16 | 4 | 14 | 40 | 34 | 9 |
| 17 | 4 | 15 | 40 | 33 | 8 |
| 18 | 4 | 15 | 41 | 32 | 8 |
| 19 | 4 | 15 | 41 | 31 | 8 |
| 20 | 5 | 16 | 42 | 30 | 7 |
| 21 | 5 | 17 | 42 | 30 | 7 |
| 22 | 5 | 17 | 42 | 29 | 7 |
| 23 | 6 | 18 | 42 | 28 | 6 |
| 24 | 6 | 19 | 42 | 28 | 6 |
| 25 | 6 | 19 | 41 | 27 | 6 |
| 26 | 6 | 20 | 41 | 27 | 6 |
| 27 | 7 | 21 | 40 | 26 | 5 |
| 28 | 7 | 22 | 40 | 26 | 5 |
| 29 | 8 | 23 | 39 | 25 | 5 |
| 30 | 8 | 24 | 39 | 24 | 5 |
| 31 | 9 | 25 | 38 | 24 | 4 |
Wind in August
Winds average 10 km/h in August.
Across August, daily wind ranges from about 10 km/h on the calmest days to 11 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
| 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 | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 10 | calm |
| 2 | 10 | calm |
| 3 | 10 | calm |
| 4 | 10 | calm |
| 5 | 10 | calm |
| 6 | 10 | calm |
| 7 | 10 | calm |
| 8 | 10 | calm |
| 9 | 10 | calm |
| 10 | 10 | calm |
| 11 | 10 | calm |
| 12 | 10 | calm |
| 13 | 10 | calm |
| 14 | 10 | calm |
| 15 | 10 | calm |
| 16 | 10 | calm |
| 17 | 11 | calm |
| 18 | 11 | calm |
| 19 | 11 | calm |
| 20 | 11 | calm |
| 21 | 11 | calm |
| 22 | 11 | calm |
| 23 | 11 | calm |
| 24 | 11 | calm |
| 25 | 11 | calm |
| 26 | 11 | calm |
| 27 | 11 | calm |
| 28 | 11 | calm |
| 29 | 11 | calm |
| 30 | 11 | calm |
| 31 | 11 | calm |
Sunrise & sunset in August
Daylight runs from about 14 h 18 min at the start of August to 13 h 06 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 72 minutes over August. Sunrise moves from 4:30 AM to 5:03 AM, and sunset from 6:51 PM to 6:06 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 14.3 | 14.3 | 14.3 | 14.2 | 14.2 | 14.2 | 14.1 | 14.1 | 14.0 | 14.0 | 14.0 | 13.9 | 13.9 | 13.8 | 13.8 | 13.7 | 13.7 | 13.7 | 13.6 | 13.6 | 13.5 | 13.5 | 13.4 | 13.4 | 13.3 | 13.3 | 13.2 | 13.2 | 13.2 | 13.1 | 13.1 |
| Sunrise (AM) | 4:30 | 4:31 | 4:32 | 4:33 | 4:34 | 4:36 | 4:37 | 4:38 | 4:39 | 4:40 | 4:41 | 4:42 | 4:43 | 4:44 | 4:45 | 4:46 | 4:47 | 4:49 | 4:50 | 4:51 | 4:52 | 4:53 | 4:54 | 4:55 | 4:56 | 4:57 | 4:58 | 5:00 | 5:01 | 5:02 | 5:03 |
| Sunset (PM) | 6:51 | 6:50 | 6:49 | 6:47 | 6:46 | 6:45 | 6:44 | 6:42 | 6:41 | 6:40 | 6:38 | 6:37 | 6:35 | 6:34 | 6:33 | 6:31 | 6:30 | 6:28 | 6:26 | 6:25 | 6:23 | 6:22 | 6:20 | 6:18 | 6:17 | 6:15 | 6:13 | 6:12 | 6:10 | 6:08 | 6:06 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.3 | 4:30 | 6:51 |
| 2 | 14.3 | 4:31 | 6:50 |
| 3 | 14.3 | 4:32 | 6:49 |
| 4 | 14.2 | 4:33 | 6:47 |
| 5 | 14.2 | 4:34 | 6:46 |
| 6 | 14.2 | 4:36 | 6:45 |
| 7 | 14.1 | 4:37 | 6:44 |
| 8 | 14.1 | 4:38 | 6:42 |
| 9 | 14.0 | 4:39 | 6:41 |
| 10 | 14.0 | 4:40 | 6:40 |
| 11 | 14.0 | 4:41 | 6:38 |
| 12 | 13.9 | 4:42 | 6:37 |
| 13 | 13.9 | 4:43 | 6:35 |
| 14 | 13.8 | 4:44 | 6:34 |
| 15 | 13.8 | 4:45 | 6:33 |
| 16 | 13.7 | 4:46 | 6:31 |
| 17 | 13.7 | 4:47 | 6:30 |
| 18 | 13.7 | 4:49 | 6:28 |
| 19 | 13.6 | 4:50 | 6:26 |
| 20 | 13.6 | 4:51 | 6:25 |
| 21 | 13.5 | 4:52 | 6:23 |
| 22 | 13.5 | 4:53 | 6:22 |
| 23 | 13.4 | 4:54 | 6:20 |
| 24 | 13.4 | 4:55 | 6:18 |
| 25 | 13.3 | 4:56 | 6:17 |
| 26 | 13.3 | 4:57 | 6:15 |
| 27 | 13.2 | 4:58 | 6:13 |
| 28 | 13.2 | 5:00 | 6:12 |
| 29 | 13.2 | 5:01 | 6:10 |
| 30 | 13.1 | 5:02 | 6:08 |
| 31 | 13.1 | 5:03 | 6:06 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 4.37 kWh/m².
For context, solar energy here swings from a low near 1.74 kWh/m² to a high of 5.48 kWh/m² in May across the year — August's 4.37 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 4.6 | 4.6 | 4.6 | 4.6 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.1 | 4.1 |
| 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 | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.6 | Bright |
| 2 | 4.6 | Bright |
| 3 | 4.6 | Bright |
| 4 | 4.6 | Bright |
| 5 | 4.5 | Bright |
| 6 | 4.5 | Bright |
| 7 | 4.5 | Bright |
| 8 | 4.5 | Bright |
| 9 | 4.5 | Bright |
| 10 | 4.4 | Bright |
| 11 | 4.4 | Bright |
| 12 | 4.4 | Bright |
| 13 | 4.4 | Bright |
| 14 | 4.4 | Bright |
| 15 | 4.3 | Bright |
| 16 | 4.3 | Bright |
| 17 | 4.3 | Bright |
| 18 | 4.3 | Bright |
| 19 | 4.3 | Bright |
| 20 | 4.3 | Bright |
| 21 | 4.3 | Bright |
| 22 | 4.3 | Bright |
| 23 | 4.2 | Bright |
| 24 | 4.2 | Bright |
| 25 | 4.2 | Bright |
| 26 | 4.2 | Bright |
| 27 | 4.2 | Bright |
| 28 | 4.2 | Bright |
| 29 | 4.2 | Bright |
| 30 | 4.1 | Bright |
| 31 | 4.1 | Bright |
Hazard calendar for Shiraoi
In August, Shiraoi sits inside its pacific typhoon and rainy season season. The full year is below, with each hazard's peak months called out.
Shiraoi sits in the Pacific typhoon belt; the season peaks July–October.
Shiraoi's rainy season runs May–October, when most of the year's rain falls.
Is August a good time to visit Shiraoi?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is a reasonable time to visit Shiraoi for sightseeing.
What to pack for Shiraoi in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Shiraoi sees daytime highs around 22°C and nights near 18°C. Pack rain gear. About 14 days see rain.
Sea temperature near Shiraoi in August
The nearest coast averages about 20°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 20 km away) is warmest in August at about 20°C and coldest in March near 4°C.
It's comfortable for a long swim from Aug 17 to Aug 28 — about 0.4 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 6 | 4 | 4 | 5 | 8 | 13 | 17 | 20 | 20 | 16 | 13 | 10 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Cool | Cool | Bracing | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 6 | Bracing |
| Feb | 4 | Bracing |
| Mar | 4 | Bracing |
| Apr | 5 | Bracing |
| May | 8 | Bracing |
| Jun | 13 | Bracing |
| Jul | 17 | Cool |
| Aug | 20 | Refreshing |
| Sep | 20 | Cool |
| Oct | 16 | Cool |
| Nov | 13 | Bracing |
| Dec | 10 | Bracing |
UV index in Shiraoi in August
Clear-sky midday UV in August peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Shiraoi peaks around August 18 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 1 (low).
The index reaches 3 or more — the level where the WHO recommends sun protection — in 7 months of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 1 | 2 | 3 | 6 | 8 | 6 | 5 | 9 | 6 | 4 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | Very high | High | Moderate | Very high | High | Moderate | Low | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Moderate |
| Mar | 3 | Moderate |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 6 | High |
| Jul | 5 | Moderate |
| Aug | 9 | Very high |
| Sep | 6 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Low |
| Dec | 1 | Low |
Air quality in Shiraoi in August
Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.
Air quality in Shiraoi is worst in April — around 20 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 8 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) | 10 | 14 | 19 | 20 | 18 | 12 | 11 | 10 | 9 | 11 | 9 | 8 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 14 | Moderate |
| Mar | 19 | Moderate |
| Apr | 20 | Moderate |
| May | 18 | Moderate |
| Jun | 12 | Moderate |
| Jul | 11 | Good |
| Aug | 10 | Good |
| Sep | 9 | Good |
| Oct | 11 | Good |
| Nov | 9 | Good |
| Dec | 8 | Good |
Where is Shiraoi?
Shiraoi sits at 42.5°N, 141.3°E, 5 m above sea level, in Japan. The nearest listed city is Noboribetsu, 18 km away.
Topography around Shiraoi
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Shiraoi.
Within 3 km, the terrain around Shiraoi has only modest variations in elevation — a maximum elevation change of 114 m around an average of 14 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 1,028 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,858 m.
The land around Shiraoi is covered by water (38%) and trees (35%) within 3 km, trees (47%) and water (46%) within 16 km, and trees (44%) and water (41%) 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 Shiraoi (42.55°, 141.35°, 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).