Shiraoi weather in May
In May, Shiraoi sees average daytime highs of 12°C and overnight lows near 7°C, with 113 mm of precipitation across 12.2 wet days and about 14.4 hours of daylight. It is the 6th-warmest and 5th-wettest month of the year here.
Highs climb over the month, from about 10°C in the first days to 14°C by the end. The sky is clear or mostly clear about 26% of the time in May, and the air most often feels dry.
Daylight stretches from about 13 h 48 min at the start of May to 14 h 54 min by month's end. Set against the rest of the year, May is Shiraoi's 8th-clearest and 9th-windiest month. For the whole year in context, see Shiraoi's year-round climate.
- Daytime high
- 12°
- 6th warmest
- Overnight low
- 7°
- 7th coldest
- Precipitation
- 113 mm
- 12.2 wet days
- Daylight
- 14 h 24 min
- 4:18 AM – 6:43 PM
- Cloud cover
- 65%
- 8th clearest
- Wind
- 11 km/h
- 9th windiest
- Solar energy
- 5.48 kWh/m²
- Travel score
- 3.0
- 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 May
Highs climb over the month, from about 10°C in the first days to 14°C by the end.
A typical May day in Shiraoi reaches about 12°C in the afternoon and slips back to 7°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 9°C and 15°C. Set against its neighbours, May runs about 5°C warmer than April and about 4°C cooler than June.
| 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) | 10 | 10 | 10 | 10 | 10 | 10 | 11 | 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 low (°C) | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 9 | 10 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 10 | 4 |
| 2 | 10 | 5 |
| 3 | 10 | 5 |
| 4 | 10 | 5 |
| 5 | 10 | 5 |
| 6 | 10 | 5 |
| 7 | 11 | 5 |
| 8 | 11 | 6 |
| 9 | 11 | 6 |
| 10 | 11 | 6 |
| 11 | 11 | 6 |
| 12 | 11 | 6 |
| 13 | 11 | 6 |
| 14 | 12 | 7 |
| 15 | 12 | 7 |
| 16 | 12 | 7 |
| 17 | 12 | 7 |
| 18 | 12 | 7 |
| 19 | 12 | 8 |
| 20 | 13 | 8 |
| 21 | 13 | 8 |
| 22 | 13 | 8 |
| 23 | 13 | 8 |
| 24 | 13 | 8 |
| 25 | 13 | 9 |
| 26 | 13 | 9 |
| 27 | 14 | 9 |
| 28 | 14 | 9 |
| 29 | 14 | 9 |
| 30 | 14 | 9 |
| 31 | 14 | 10 |
How May really feels in Shiraoi
Once humidity and wind are folded in, May 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.
May 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 May compares with the rest of the year at a glance. May is the 6th-warmest and 5th-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 May
The sky is clear or mostly clear about 26% of the time in May.
Beyond those clear spells, partly cloudy skies cover about 14% of May, with mostly cloudy or overcast conditions the remaining 59%.
| 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 (%) | 45 | 44 | 44 | 42 | 42 | 40 | 40 | 40 | 40 | 39 | 39 | 39 | 40 | 40 | 40 | 40 | 40 | 39 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 40 | 41 | 41 | 40 |
| Cloudier (%) | 55 | 56 | 56 | 58 | 58 | 60 | 60 | 60 | 60 | 61 | 61 | 61 | 60 | 60 | 60 | 60 | 60 | 61 | 59 | 59 | 59 | 59 | 59 | 59 | 59 | 59 | 59 | 60 | 59 | 59 | 60 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 45 | 55 |
| 2 | 44 | 56 |
| 3 | 44 | 56 |
| 4 | 42 | 58 |
| 5 | 42 | 58 |
| 6 | 40 | 60 |
| 7 | 40 | 60 |
| 8 | 40 | 60 |
| 9 | 40 | 60 |
| 10 | 39 | 61 |
| 11 | 39 | 61 |
| 12 | 39 | 61 |
| 13 | 40 | 60 |
| 14 | 40 | 60 |
| 15 | 40 | 60 |
| 16 | 40 | 60 |
| 17 | 40 | 60 |
| 18 | 39 | 61 |
| 19 | 41 | 59 |
| 20 | 41 | 59 |
| 21 | 41 | 59 |
| 22 | 41 | 59 |
| 23 | 41 | 59 |
| 24 | 41 | 59 |
| 25 | 41 | 59 |
| 26 | 41 | 59 |
| 27 | 41 | 59 |
| 28 | 40 | 60 |
| 29 | 41 | 59 |
| 30 | 41 | 59 |
| 31 | 40 | 60 |
Chance of precipitation in May
Shiraoi gets around 113 mm of rain and snow over 12.2 wet days in May. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 39% and peaks near 42% on the wettest days, and about 0 day brings snow.
| 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 (%) | 39 | 40 | 40 | 41 | 41 | 41 | 42 | 42 | 42 | 42 | 42 | 41 | 41 | 41 | 40 | 40 | 39 | 39 | 38 | 38 | 38 | 37 | 37 | 37 | 37 | 37 | 36 | 36 | 36 | 36 | 36 |
| Snow chance (%) | 3 | 3 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 39 | 3 |
| 2 | 40 | 3 |
| 3 | 40 | 2 |
| 4 | 41 | 2 |
| 5 | 41 | 2 |
| 6 | 41 | 1 |
| 7 | 42 | 1 |
| 8 | 42 | 1 |
| 9 | 42 | 1 |
| 10 | 42 | 1 |
| 11 | 42 | 1 |
| 12 | 41 | 1 |
| 13 | 41 | 1 |
| 14 | 41 | 1 |
| 15 | 40 | 1 |
| 16 | 40 | 1 |
| 17 | 39 | 0 |
| 18 | 39 | 0 |
| 19 | 38 | 0 |
| 20 | 38 | 0 |
| 21 | 38 | 0 |
| 22 | 37 | 0 |
| 23 | 37 | 0 |
| 24 | 37 | 0 |
| 25 | 37 | 0 |
| 26 | 37 | 0 |
| 27 | 36 | 0 |
| 28 | 36 | 0 |
| 29 | 36 | 0 |
| 30 | 36 | 0 |
| 31 | 36 | 0 |
Humidity in May
Most of May feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, May 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 100 | 100 | 100 | 100 | 100 | 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 |
| Comfortable (%) | 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 | 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 | 100 | 0 |
| 25 | 100 | 0 |
| 26 | 100 | 0 |
| 27 | 100 | 0 |
| 28 | 100 | 0 |
| 29 | 99 | 1 |
| 30 | 99 | 1 |
| 31 | 99 | 1 |
Wind in May
Winds average 11 km/h in May.
Across May, daily wind ranges from about 10 km/h on the calmest days to 12 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) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | 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 | 12 | light breeze |
| 2 | 12 | light breeze |
| 3 | 12 | light breeze |
| 4 | 12 | light breeze |
| 5 | 12 | light breeze |
| 6 | 12 | calm |
| 7 | 12 | calm |
| 8 | 12 | calm |
| 9 | 12 | calm |
| 10 | 12 | calm |
| 11 | 12 | calm |
| 12 | 11 | calm |
| 13 | 11 | calm |
| 14 | 11 | calm |
| 15 | 11 | calm |
| 16 | 11 | 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 | 10 | calm |
| 26 | 10 | calm |
| 27 | 10 | calm |
| 28 | 10 | calm |
| 29 | 10 | calm |
| 30 | 10 | calm |
| 31 | 10 | calm |
Sunrise & sunset in May
Daylight runs from about 13 h 48 min at the start of May to 14 h 54 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 66 minutes over May. Sunrise moves from 4:37 AM to 4:06 AM, and sunset from 6:27 PM to 6:58 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) | 13.8 | 13.9 | 13.9 | 14.0 | 14.0 | 14.0 | 14.1 | 14.1 | 14.2 | 14.2 | 14.2 | 14.3 | 14.3 | 14.3 | 14.4 | 14.4 | 14.5 | 14.5 | 14.5 | 14.6 | 14.6 | 14.6 | 14.6 | 14.7 | 14.7 | 14.7 | 14.8 | 14.8 | 14.8 | 14.8 | 14.9 |
| Sunrise (AM) | 4:37 | 4:35 | 4:34 | 4:33 | 4:31 | 4:30 | 4:29 | 4:28 | 4:26 | 4:25 | 4:24 | 4:23 | 4:22 | 4:20 | 4:19 | 4:18 | 4:17 | 4:16 | 4:15 | 4:14 | 4:14 | 4:13 | 4:12 | 4:11 | 4:10 | 4:09 | 4:09 | 4:08 | 4:07 | 4:07 | 4:06 |
| Sunset (PM) | 6:27 | 6:28 | 6:29 | 6:30 | 6:31 | 6:32 | 6:34 | 6:35 | 6:36 | 6:37 | 6:38 | 6:39 | 6:40 | 6:41 | 6:42 | 6:43 | 6:44 | 6:45 | 6:46 | 6:47 | 6:48 | 6:49 | 6:50 | 6:51 | 6:52 | 6:53 | 6:54 | 6:55 | 6:56 | 6:57 | 6:58 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.8 | 4:37 | 6:27 |
| 2 | 13.9 | 4:35 | 6:28 |
| 3 | 13.9 | 4:34 | 6:29 |
| 4 | 14.0 | 4:33 | 6:30 |
| 5 | 14.0 | 4:31 | 6:31 |
| 6 | 14.0 | 4:30 | 6:32 |
| 7 | 14.1 | 4:29 | 6:34 |
| 8 | 14.1 | 4:28 | 6:35 |
| 9 | 14.2 | 4:26 | 6:36 |
| 10 | 14.2 | 4:25 | 6:37 |
| 11 | 14.2 | 4:24 | 6:38 |
| 12 | 14.3 | 4:23 | 6:39 |
| 13 | 14.3 | 4:22 | 6:40 |
| 14 | 14.3 | 4:20 | 6:41 |
| 15 | 14.4 | 4:19 | 6:42 |
| 16 | 14.4 | 4:18 | 6:43 |
| 17 | 14.5 | 4:17 | 6:44 |
| 18 | 14.5 | 4:16 | 6:45 |
| 19 | 14.5 | 4:15 | 6:46 |
| 20 | 14.6 | 4:14 | 6:47 |
| 21 | 14.6 | 4:14 | 6:48 |
| 22 | 14.6 | 4:13 | 6:49 |
| 23 | 14.6 | 4:12 | 6:50 |
| 24 | 14.7 | 4:11 | 6:51 |
| 25 | 14.7 | 4:10 | 6:52 |
| 26 | 14.7 | 4:09 | 6:53 |
| 27 | 14.8 | 4:09 | 6:54 |
| 28 | 14.8 | 4:08 | 6:55 |
| 29 | 14.8 | 4:07 | 6:56 |
| 30 | 14.8 | 4:07 | 6:57 |
| 31 | 14.9 | 4:06 | 6:58 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 5.48 kWh/m² — the sunniest month for solar.
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 — May's 5.48 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.5 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 | 5.6 |
| 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 | 5.5 | Bright |
| 2 | 5.5 | Bright |
| 3 | 5.5 | Bright |
| 4 | 5.5 | Bright |
| 5 | 5.5 | Bright |
| 6 | 5.5 | Bright |
| 7 | 5.4 | Bright |
| 8 | 5.4 | Bright |
| 9 | 5.4 | Bright |
| 10 | 5.4 | Bright |
| 11 | 5.4 | Bright |
| 12 | 5.4 | Bright |
| 13 | 5.4 | Bright |
| 14 | 5.4 | Bright |
| 15 | 5.4 | Bright |
| 16 | 5.4 | Bright |
| 17 | 5.5 | Bright |
| 18 | 5.5 | Bright |
| 19 | 5.5 | Bright |
| 20 | 5.5 | Bright |
| 21 | 5.5 | Bright |
| 22 | 5.5 | Bright |
| 23 | 5.5 | Bright |
| 24 | 5.5 | Bright |
| 25 | 5.6 | Bright |
| 26 | 5.6 | Bright |
| 27 | 5.6 | Bright |
| 28 | 5.6 | Bright |
| 29 | 5.6 | Bright |
| 30 | 5.6 | Bright |
| 31 | 5.6 | Bright |
Hazard calendar for Shiraoi
In May, 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 May a good time to visit Shiraoi?
Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
May is a weaker month for outdoor sightseeing in Shiraoi.
What to pack for Shiraoi in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Shiraoi sees daytime highs around 12°C and nights near 7°C. Pack a warm layer. Worth having: rain gear and sun protection. About 12 days see rain.
Sea temperature near Shiraoi in May
The nearest coast averages about 8°C in May — 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 May
Clear-sky midday UV in May 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 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 May
Average fine-particle pollution (PM2.5) through the year — so you can see where May 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).