Shiraoka weather in April
In April, Shiraoka sees average daytime highs of 19°C and overnight lows near 9°C, with 105 mm of precipitation across 11.1 wet days and about 12.9 hours of daylight. It is the 7th-warmest and 7th-wettest month of the year here.
Highs climb over the month, from about 16°C in the first days to 21°C by the end. The sky is clear or mostly clear about 32% 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 Shiraoka's 7th-clearest and 1st-windiest month. For the whole year in context, see Shiraoka's year-round climate.
- Daytime high
- 19°
- 7th warmest
- Overnight low
- 9°
- 6th coldest
- Precipitation
- 105 mm
- 11.1 wet days
- Daylight
- 12 h 54 min
- 5:14 AM – 6:09 PM
- Cloud cover
- 60%
- 7th clearest
- Wind
- 11 km/h
- 1st windiest
- Solar energy
- 4.83 kWh/m²
- Travel score
- 5.8
- out of 10
Temperature in April
Highs climb over the month, from about 16°C in the first days to 21°C by the end.
A typical April day in Shiraoka reaches about 19°C in the afternoon and slips back to 9°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 14°C and 23°C. Set against its neighbours, April runs about 5°C warmer than March and about 5°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) | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 19 | 19 | 19 | 20 | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 21 | 21 | 21 |
| Avg low (°C) | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 16 | 7 |
| 2 | 16 | 7 |
| 3 | 16 | 7 |
| 4 | 17 | 7 |
| 5 | 17 | 7 |
| 6 | 17 | 8 |
| 7 | 17 | 8 |
| 8 | 17 | 8 |
| 9 | 18 | 8 |
| 10 | 18 | 8 |
| 11 | 18 | 9 |
| 12 | 18 | 9 |
| 13 | 18 | 9 |
| 14 | 19 | 9 |
| 15 | 19 | 9 |
| 16 | 19 | 10 |
| 17 | 19 | 10 |
| 18 | 19 | 10 |
| 19 | 19 | 10 |
| 20 | 20 | 10 |
| 21 | 20 | 11 |
| 22 | 20 | 11 |
| 23 | 20 | 11 |
| 24 | 20 | 11 |
| 25 | 20 | 11 |
| 26 | 21 | 12 |
| 27 | 21 | 12 |
| 28 | 21 | 12 |
| 29 | 21 | 12 |
| 30 | 21 | 12 |
How April really feels in Shiraoka
Once humidity and wind are folded in, April 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.
April sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Shiraoka weather by month
How April compares with the rest of the year at a glance. April is the 7th-warmest and 7th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Snow days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|---|
| Jan | 9° / 0° | 57 | 6.1 | 1.5 | 9.8 | 2.2 |
| Feb | 10° / 1° | 54 | 6.8 | 1.6 | 10.6 | 2.5 |
| Mar | 14° / 4° | 99 | 10.8 | 0.8 | 11.7 | 3.9 |
| Apr | 19° / 9° | 105 | 11.1 | 0.1 | 12.9 | 5.8 |
| May | 23° / 15° | 128 | 12.2 | 0 | 13.9 | 6.4 |
| Jun | 26° / 19° | 152 | 14.1 | 0 | 14.4 | 5.6 |
| Jul | 30° / 23° | 159 | 14.7 | 0 | 14.2 | 4.4 |
| Aug | 31° / 24° | 118 | 12.3 | 0 | 13.4 | 4.0 |
| Sep | 27° / 21° | 172 | 13.7 | 0 | 12.2 | 5.5 |
| Oct | 22° / 14° | 190 | 12.6 | 0 | 11.1 | 6.2 |
| Nov | 16° / 8° | 81 | 9.2 | 0 | 10.1 | 5.4 |
| Dec | 12° / 3° | 52 | 6.5 | 0.2 | 9.6 | 3.4 |
Cloud cover in April
The sky is clear or mostly clear about 32% of the time in April.
Beyond those clear spells, partly cloudy skies cover about 13% of April, with mostly cloudy or overcast conditions the remaining 54%.
| 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 (%) | 51 | 51 | 50 | 50 | 50 | 50 | 48 | 48 | 48 | 47 | 47 | 45 | 44 | 44 | 44 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 43 | 44 | 44 | 44 | 44 | 44 | 44 | 44 |
| Cloudier (%) | 49 | 49 | 50 | 50 | 50 | 50 | 52 | 52 | 52 | 53 | 53 | 55 | 56 | 56 | 56 | 57 | 57 | 57 | 57 | 57 | 57 | 57 | 57 | 56 | 56 | 56 | 56 | 56 | 56 | 56 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 51 | 49 |
| 2 | 51 | 49 |
| 3 | 50 | 50 |
| 4 | 50 | 50 |
| 5 | 50 | 50 |
| 6 | 50 | 50 |
| 7 | 48 | 52 |
| 8 | 48 | 52 |
| 9 | 48 | 52 |
| 10 | 47 | 53 |
| 11 | 47 | 53 |
| 12 | 45 | 55 |
| 13 | 44 | 56 |
| 14 | 44 | 56 |
| 15 | 44 | 56 |
| 16 | 43 | 57 |
| 17 | 43 | 57 |
| 18 | 43 | 57 |
| 19 | 43 | 57 |
| 20 | 43 | 57 |
| 21 | 43 | 57 |
| 22 | 43 | 57 |
| 23 | 43 | 57 |
| 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
Shiraoka gets around 105 mm of rain and snow over 11.1 wet days in April. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 37% and peaks near 39% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 37 | 37 | 37 | 38 | 38 | 38 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 38 | 38 | 37 | 37 | 36 | 36 | 36 | 35 | 35 | 35 | 34 | 34 |
| Rain chance (%) | |
|---|---|
| 1 | 37 |
| 2 | 37 |
| 3 | 37 |
| 4 | 38 |
| 5 | 38 |
| 6 | 38 |
| 7 | 39 |
| 8 | 39 |
| 9 | 39 |
| 10 | 39 |
| 11 | 39 |
| 12 | 39 |
| 13 | 39 |
| 14 | 39 |
| 15 | 39 |
| 16 | 39 |
| 17 | 39 |
| 18 | 39 |
| 19 | 38 |
| 20 | 38 |
| 21 | 37 |
| 22 | 37 |
| 23 | 36 |
| 24 | 36 |
| 25 | 36 |
| 26 | 35 |
| 27 | 35 |
| 28 | 35 |
| 29 | 34 |
| 30 | 34 |
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 89% 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 (%) | 99 | 98 | 98 | 98 | 97 | 97 | 97 | 96 | 96 | 95 | 94 | 94 | 93 | 93 | 92 | 91 | 90 | 90 | 88 | 87 | 86 | 85 | 83 | 82 | 80 | 78 | 77 | 75 | 74 | 72 |
| Comfortable (%) | 1 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 4 | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 16 | 17 | 18 | 19 | 20 | 21 |
| Humid (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 5 | 5 | 6 |
| 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 | 99 | 1 | 0 | 0 |
| 2 | 98 | 2 | 0 | 0 |
| 3 | 98 | 2 | 0 | 0 |
| 4 | 98 | 2 | 0 | 0 |
| 5 | 97 | 3 | 0 | 0 |
| 6 | 97 | 3 | 0 | 0 |
| 7 | 97 | 3 | 0 | 0 |
| 8 | 96 | 4 | 0 | 0 |
| 9 | 96 | 4 | 0 | 0 |
| 10 | 95 | 4 | 1 | 0 |
| 11 | 94 | 5 | 1 | 0 |
| 12 | 94 | 5 | 1 | 0 |
| 13 | 93 | 6 | 1 | 0 |
| 14 | 93 | 6 | 1 | 0 |
| 15 | 92 | 7 | 1 | 0 |
| 16 | 91 | 7 | 2 | 0 |
| 17 | 90 | 8 | 2 | 0 |
| 18 | 90 | 8 | 2 | 0 |
| 19 | 88 | 9 | 2 | 1 |
| 20 | 87 | 10 | 2 | 1 |
| 21 | 86 | 11 | 2 | 1 |
| 22 | 85 | 12 | 2 | 1 |
| 23 | 83 | 13 | 3 | 1 |
| 24 | 82 | 14 | 3 | 1 |
| 25 | 80 | 16 | 3 | 1 |
| 26 | 78 | 17 | 4 | 1 |
| 27 | 77 | 18 | 4 | 1 |
| 28 | 75 | 19 | 5 | 1 |
| 29 | 74 | 20 | 5 | 1 |
| 30 | 72 | 21 | 6 | 1 |
Wind in April
Winds average 11 km/h in April, the windiest month of the year.
Across April, daily wind ranges from about 11 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 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 |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 11 | calm |
| 2 | 11 | calm |
| 3 | 11 | calm |
| 4 | 11 | calm |
| 5 | 11 | calm |
| 6 | 11 | calm |
| 7 | 11 | calm |
| 8 | 11 | calm |
| 9 | 11 | calm |
| 10 | 11 | calm |
| 11 | 11 | 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 | 11 | calm |
| 26 | 11 | calm |
| 27 | 11 | calm |
| 28 | 11 | calm |
| 29 | 11 | calm |
| 30 | 11 | 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 5:36 AM to 4:56 AM, and sunset from 5:56 PM to 6:21 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 | 13.0 | 13.0 | 13.0 | 13.1 | 13.1 | 13.1 | 13.2 | 13.2 | 13.2 | 13.3 | 13.3 | 13.3 | 13.4 | 13.4 |
| Sunrise (AM) | 5:36 | 5:34 | 5:33 | 5:31 | 5:30 | 5:28 | 5:27 | 5:25 | 5:24 | 5:23 | 5:21 | 5:20 | 5:18 | 5:17 | 5:16 | 5:14 | 5:13 | 5:11 | 5:10 | 5:09 | 5:07 | 5:06 | 5:05 | 5:04 | 5:02 | 5:01 | 5:00 | 4:59 | 4:58 | 4:56 |
| Sunset (PM) | 5:56 | 5:57 | 5:58 | 5:59 | 6:00 | 6:00 | 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 | 6:18 | 6:18 | 6:19 | 6:20 | 6:21 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.3 | 5:36 | 5:56 |
| 2 | 12.4 | 5:34 | 5:57 |
| 3 | 12.4 | 5:33 | 5:58 |
| 4 | 12.5 | 5:31 | 5:59 |
| 5 | 12.5 | 5:30 | 6:00 |
| 6 | 12.5 | 5:28 | 6:00 |
| 7 | 12.6 | 5:27 | 6:01 |
| 8 | 12.6 | 5:25 | 6:02 |
| 9 | 12.6 | 5:24 | 6:03 |
| 10 | 12.7 | 5:23 | 6:04 |
| 11 | 12.7 | 5:21 | 6:05 |
| 12 | 12.8 | 5:20 | 6:06 |
| 13 | 12.8 | 5:18 | 6:06 |
| 14 | 12.8 | 5:17 | 6:07 |
| 15 | 12.9 | 5:16 | 6:08 |
| 16 | 12.9 | 5:14 | 6:09 |
| 17 | 13.0 | 5:13 | 6:10 |
| 18 | 13.0 | 5:11 | 6:11 |
| 19 | 13.0 | 5:10 | 6:12 |
| 20 | 13.1 | 5:09 | 6:12 |
| 21 | 13.1 | 5:07 | 6:13 |
| 22 | 13.1 | 5:06 | 6:14 |
| 23 | 13.2 | 5:05 | 6:15 |
| 24 | 13.2 | 5:04 | 6:16 |
| 25 | 13.2 | 5:02 | 6:17 |
| 26 | 13.3 | 5:01 | 6:18 |
| 27 | 13.3 | 5:00 | 6:18 |
| 28 | 13.3 | 4:59 | 6:19 |
| 29 | 13.4 | 4:58 | 6:20 |
| 30 | 13.4 | 4:56 | 6:21 |
Solar energy in April
Average shortwave solar energy reaching the ground each day in April, about 4.83 kWh/m².
For context, solar energy here swings from a low near 2.38 kWh/m² to a high of 5.04 kWh/m² in May across the year — April's 4.83 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) | 4.6 | 4.6 | 4.6 | 4.6 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.8 | 4.9 | 4.9 | 4.9 | 4.9 | 5.0 | 5.0 | 5.0 | 5.0 | 5.1 | 5.1 |
| 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 |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.6 | Bright |
| 2 | 4.6 | Bright |
| 3 | 4.6 | Bright |
| 4 | 4.6 | Bright |
| 5 | 4.7 | Bright |
| 6 | 4.7 | Bright |
| 7 | 4.7 | Bright |
| 8 | 4.7 | Bright |
| 9 | 4.7 | Bright |
| 10 | 4.7 | Bright |
| 11 | 4.7 | Bright |
| 12 | 4.7 | Bright |
| 13 | 4.8 | Bright |
| 14 | 4.8 | Bright |
| 15 | 4.8 | Bright |
| 16 | 4.8 | Bright |
| 17 | 4.8 | Bright |
| 18 | 4.8 | Bright |
| 19 | 4.8 | Bright |
| 20 | 4.8 | Bright |
| 21 | 4.9 | Bright |
| 22 | 4.9 | Bright |
| 23 | 4.9 | Bright |
| 24 | 4.9 | Bright |
| 25 | 5.0 | Bright |
| 26 | 5.0 | Bright |
| 27 | 5.0 | Bright |
| 28 | 5.0 | Bright |
| 29 | 5.1 | Bright |
| 30 | 5.1 | Bright |
Is April a good time to visit Shiraoka?
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 Shiraoka for sightseeing.
What to pack for Shiraoka in April
From April's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In April, Shiraoka sees daytime highs around 19°C and nights near 9°C. Worth packing: rain gear and sun protection. About 11 days see rain.
Sea temperature near Shiraoka in April
The nearest coast averages about 15°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 48 km away) is warmest in August at about 26°C and coldest in February near 13°C.
It's comfortable for a long swim from Jun 7 to Nov 3 — about 4.9 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 14 | 13 | 13 | 15 | 18 | 21 | 23 | 26 | 25 | 22 | 19 | 16 |
| Comfort | Bracing | Bracing | Bracing | Cool | Cool | Refreshing | Refreshing | Warm | Warm | Refreshing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 14 | Bracing |
| Feb | 13 | Bracing |
| Mar | 13 | Bracing |
| Apr | 15 | Cool |
| May | 18 | Cool |
| Jun | 21 | Refreshing |
| Jul | 23 | Refreshing |
| Aug | 26 | Warm |
| Sep | 25 | Warm |
| Oct | 22 | Refreshing |
| Nov | 19 | Cool |
| Dec | 16 | Cool |
UV index in Shiraoka in April
Clear-sky midday UV in April 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 Shiraoka peaks around July 16 at about 10 (very high) — 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 | 6 | 8 | 9 | 10 | 9 | 9 | 6 | 3 | 2 |
| Level | Moderate | Moderate | Moderate | High | Very high | Very high | Very high | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Moderate |
| Feb | 4 | Moderate |
| Mar | 4 | Moderate |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 9 | Very high |
| Jul | 10 | Very high |
| Aug | 9 | Very high |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Moderate |
Air quality in Shiraoka 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 Shiraoka is worst in April — around 26 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (December, 14 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) | 15 | 21 | 25 | 26 | 24 | 20 | 17 | 16 | 16 | 16 | 16 | 14 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 15 | Moderate |
| Feb | 21 | Moderate |
| Mar | 25 | Moderate |
| Apr | 26 | Moderate |
| May | 24 | Moderate |
| Jun | 20 | Moderate |
| Jul | 17 | Moderate |
| Aug | 16 | Moderate |
| Sep | 16 | Moderate |
| Oct | 16 | Moderate |
| Nov | 16 | Moderate |
| Dec | 14 | Moderate |
Where is Shiraoka?
Shiraoka sits at 36.0°N, 139.7°E, 13 m above sea level, in Japan. The nearest listed city is Shinden, 4.0 km away.
Topography around Shiraoka
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Shiraoka.
Within 3 km, the terrain around Shiraoka has only modest variations in elevation — a maximum elevation change of 22 m around an average of 11 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 48 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,253 m.
The land around Shiraoka is covered by artificial surfaces (52%) and cropland (30%) within 3 km, artificial surfaces (50%) and cropland (34%) within 16 km, and trees (44%) and artificial surfaces (29%) 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 Shiraoka (36.0184°, 139.6603°, elevation 13 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).