Hirakawa weather in August
In August, Hirakawa sees average daytime highs of 26°C and overnight lows near 19°C, with 177 mm of rain across 16.1 wet days and about 13.6 hours of daylight. It is the 1st-warmest and 1st-wettest month of the year here.
Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 17% of the time in August, and the air most often feels muggy.
Daylight stretches from about 14 h 12 min at the start of August to 13 hours by month's end. Set against the rest of the year, August is Hirakawa's 7th-clearest and 12th-windiest month. For the whole year in context, see Hirakawa's year-round climate.
- Daytime high
- 26°
- 1st warmest
- Overnight low
- 19°
- 12th coldest
- Rainfall
- 177 mm
- 16.1 wet days
- Daylight
- 13 h 36 min
- 4:53 AM – 6:31 PM
- Cloud cover
- 71%
- 7th clearest
- Wind
- 7 km/h
- 12th windiest
- Solar energy
- 4.42 kWh/m²
- Travel score
- 5.6
- out of 10
Hirakawa is city in Aomori Prefecture, Japan.
- Density
- 89/km²
- people per km²
- Founded
- 2006
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in August
Day-to-day highs hold fairly steady near 26°C through the month.
A typical August day in Hirakawa reaches about 26°C in the afternoon and slips back to 19°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 30°C. Set against its neighbours, August runs about 1°C warmer than July and about 4°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) | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 |
| Avg low (°C) | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 20 |
| 2 | 27 | 20 |
| 3 | 27 | 20 |
| 4 | 27 | 20 |
| 5 | 27 | 20 |
| 6 | 27 | 20 |
| 7 | 27 | 20 |
| 8 | 27 | 20 |
| 9 | 27 | 20 |
| 10 | 27 | 20 |
| 11 | 27 | 20 |
| 12 | 26 | 20 |
| 13 | 26 | 19 |
| 14 | 26 | 19 |
| 15 | 26 | 19 |
| 16 | 26 | 19 |
| 17 | 26 | 19 |
| 18 | 26 | 19 |
| 19 | 26 | 19 |
| 20 | 26 | 19 |
| 21 | 26 | 19 |
| 22 | 26 | 19 |
| 23 | 26 | 19 |
| 24 | 26 | 18 |
| 25 | 26 | 18 |
| 26 | 25 | 18 |
| 27 | 25 | 18 |
| 28 | 25 | 18 |
| 29 | 25 | 18 |
| 30 | 25 | 18 |
| 31 | 25 | 18 |
How August really feels in Hirakawa
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.
Hirakawa 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 | -0° / -6° | 82 | 16.9 | 21.6 | 9.4 | 0.0 |
| Feb | 1° / -6° | 80 | 15.5 | 17.9 | 10.4 | 0.0 |
| Mar | 5° / -3° | 101 | 16.8 | 13.8 | 11.7 | 0.2 |
| Apr | 12° / 3° | 98 | 13.7 | 3.4 | 13 | 2.8 |
| May | 18° / 9° | 104 | 13.1 | 0.1 | 14.2 | 5.2 |
| Jun | 22° / 14° | 109 | 13.1 | 0 | 14.8 | 5.8 |
| Jul | 25° / 18° | 163 | 16.4 | 0 | 14.6 | 5.6 |
| Aug | 26° / 19° | 177 | 16.1 | 0 | 13.6 | 5.6 |
| Sep | 22° / 14° | 154 | 14.2 | 0 | 12.3 | 5.8 |
| Oct | 16° / 8° | 129 | 13.8 | 0.1 | 10.9 | 4.5 |
| Nov | 9° / 2° | 112 | 16.3 | 6 | 9.7 | 1.5 |
| Dec | 2° / -4° | 106 | 18 | 18.2 | 9.2 | 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 15% of August, with mostly cloudy or overcast conditions the remaining 69%.
| 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 (%) | 30 | 30 | 32 | 33 | 32 | 33 | 32 | 32 | 32 | 32 | 33 | 32 | 32 | 31 | 31 | 31 | 31 | 32 | 33 | 33 | 33 | 32 | 32 | 32 | 30 | 31 | 31 | 30 | 31 | 31 | 30 |
| Cloudier (%) | 70 | 70 | 68 | 67 | 68 | 67 | 68 | 68 | 68 | 68 | 67 | 68 | 68 | 69 | 69 | 69 | 69 | 68 | 67 | 67 | 67 | 68 | 68 | 68 | 70 | 69 | 69 | 70 | 69 | 69 | 70 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 30 | 70 |
| 2 | 30 | 70 |
| 3 | 32 | 68 |
| 4 | 33 | 67 |
| 5 | 32 | 68 |
| 6 | 33 | 67 |
| 7 | 32 | 68 |
| 8 | 32 | 68 |
| 9 | 32 | 68 |
| 10 | 32 | 68 |
| 11 | 33 | 67 |
| 12 | 32 | 68 |
| 13 | 32 | 68 |
| 14 | 31 | 69 |
| 15 | 31 | 69 |
| 16 | 31 | 69 |
| 17 | 31 | 69 |
| 18 | 32 | 68 |
| 19 | 33 | 67 |
| 20 | 33 | 67 |
| 21 | 33 | 67 |
| 22 | 32 | 68 |
| 23 | 32 | 68 |
| 24 | 32 | 68 |
| 25 | 30 | 70 |
| 26 | 31 | 69 |
| 27 | 31 | 69 |
| 28 | 30 | 70 |
| 29 | 31 | 69 |
| 30 | 31 | 69 |
| 31 | 30 | 70 |
Chance of precipitation in August
Hirakawa gets around 177 mm of rain over 16.1 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 52% and peaks near 54% 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 (%) | 48 | 48 | 48 | 48 | 48 | 49 | 49 | 49 | 49 | 50 | 50 | 51 | 51 | 52 | 52 | 52 | 53 | 53 | 53 | 53 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 54 | 53 |
| Rain chance (%) | |
|---|---|
| 1 | 48 |
| 2 | 48 |
| 3 | 48 |
| 4 | 48 |
| 5 | 48 |
| 6 | 49 |
| 7 | 49 |
| 8 | 49 |
| 9 | 49 |
| 10 | 50 |
| 11 | 50 |
| 12 | 51 |
| 13 | 51 |
| 14 | 52 |
| 15 | 52 |
| 16 | 52 |
| 17 | 53 |
| 18 | 53 |
| 19 | 53 |
| 20 | 53 |
| 21 | 54 |
| 22 | 54 |
| 23 | 54 |
| 24 | 54 |
| 25 | 54 |
| 26 | 54 |
| 27 | 54 |
| 28 | 54 |
| 29 | 54 |
| 30 | 54 |
| 31 | 53 |
Humidity in August
Most of August feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the muggy band about 40% of days. Sticky, muggy-or-worse air turns up on roughly 66% 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 (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 4 |
| Comfortable (%) | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 8 | 9 | 9 | 10 | 10 | 11 | 12 | 12 | 13 | 14 | 15 | 16 | 17 |
| Humid (%) | 16 | 16 | 17 | 17 | 17 | 18 | 18 | 19 | 19 | 20 | 20 | 21 | 21 | 22 | 22 | 22 | 23 | 23 | 24 | 24 | 25 | 25 | 26 | 27 | 27 | 29 | 29 | 30 | 31 | 33 | 34 |
| Muggy (%) | 43 | 42 | 42 | 41 | 41 | 41 | 41 | 41 | 41 | 41 | 42 | 42 | 42 | 42 | 42 | 42 | 42 | 41 | 41 | 40 | 40 | 39 | 39 | 39 | 38 | 38 | 37 | 36 | 35 | 34 | 33 |
| Oppressive (%) | 34 | 34 | 35 | 35 | 35 | 34 | 34 | 33 | 32 | 32 | 31 | 30 | 29 | 29 | 28 | 27 | 26 | 25 | 25 | 24 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 1 | 6 | 16 | 43 | 34 |
| 2 | 1 | 6 | 16 | 42 | 34 |
| 3 | 1 | 6 | 17 | 42 | 35 |
| 4 | 1 | 6 | 17 | 41 | 35 |
| 5 | 1 | 6 | 17 | 41 | 35 |
| 6 | 1 | 6 | 18 | 41 | 34 |
| 7 | 1 | 6 | 18 | 41 | 34 |
| 8 | 1 | 6 | 19 | 41 | 33 |
| 9 | 1 | 6 | 19 | 41 | 32 |
| 10 | 1 | 6 | 20 | 41 | 32 |
| 11 | 1 | 7 | 20 | 42 | 31 |
| 12 | 1 | 7 | 21 | 42 | 30 |
| 13 | 1 | 7 | 21 | 42 | 29 |
| 14 | 1 | 7 | 22 | 42 | 29 |
| 15 | 1 | 7 | 22 | 42 | 28 |
| 16 | 2 | 7 | 22 | 42 | 27 |
| 17 | 2 | 7 | 23 | 42 | 26 |
| 18 | 2 | 8 | 23 | 41 | 25 |
| 19 | 2 | 8 | 24 | 41 | 25 |
| 20 | 3 | 9 | 24 | 40 | 24 |
| 21 | 3 | 9 | 25 | 40 | 23 |
| 22 | 3 | 10 | 25 | 39 | 22 |
| 23 | 3 | 10 | 26 | 39 | 21 |
| 24 | 3 | 11 | 27 | 39 | 20 |
| 25 | 3 | 12 | 27 | 38 | 19 |
| 26 | 3 | 12 | 29 | 38 | 18 |
| 27 | 4 | 13 | 29 | 37 | 17 |
| 28 | 4 | 14 | 30 | 36 | 16 |
| 29 | 4 | 15 | 31 | 35 | 15 |
| 30 | 4 | 16 | 33 | 34 | 14 |
| 31 | 4 | 17 | 34 | 33 | 13 |
Wind in August
Winds average 7 km/h in August, the calmest month.
Across August, daily wind ranges from about 7 km/h on the calmest days to 7 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) | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| 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 | 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 | 7 | calm |
| 15 | 7 | calm |
| 16 | 7 | calm |
| 17 | 7 | calm |
| 18 | 7 | calm |
| 19 | 7 | calm |
| 20 | 7 | calm |
| 21 | 7 | calm |
| 22 | 7 | calm |
| 23 | 7 | calm |
| 24 | 7 | calm |
| 25 | 7 | calm |
| 26 | 7 | calm |
| 27 | 7 | calm |
| 28 | 7 | calm |
| 29 | 7 | calm |
| 30 | 7 | calm |
| 31 | 7 | calm |
Sunrise & sunset in August
Daylight runs from about 14 h 12 min at the start of August to 13 hours by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 72 minutes over August. Sunrise moves from 4:38 AM to 5:08 AM, and sunset from 6:49 PM to 6:07 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 14.2 | 14.2 | 14.1 | 14.1 | 14.0 | 14.0 | 14.0 | 13.9 | 13.9 | 13.9 | 13.8 | 13.8 | 13.7 | 13.7 | 13.7 | 13.6 | 13.6 | 13.5 | 13.5 | 13.5 | 13.4 | 13.4 | 13.3 | 13.3 | 13.3 | 13.2 | 13.2 | 13.1 | 13.1 | 13.0 | 13.0 |
| Sunrise (AM) | 4:38 | 4:39 | 4:40 | 4:41 | 4:42 | 4:43 | 4:44 | 4:45 | 4:46 | 4:47 | 4:48 | 4:49 | 4:50 | 4:51 | 4:52 | 4:53 | 4:54 | 4:55 | 4:56 | 4:57 | 4:58 | 4:59 | 5:00 | 5:01 | 5:02 | 5:03 | 5:04 | 5:05 | 5:06 | 5:07 | 5:08 |
| Sunset (PM) | 6:49 | 6:48 | 6:47 | 6:46 | 6:45 | 6:44 | 6:42 | 6:41 | 6:40 | 6:39 | 6:37 | 6:36 | 6:35 | 6:33 | 6:32 | 6:31 | 6:29 | 6:28 | 6:26 | 6:25 | 6:23 | 6:22 | 6:20 | 6:19 | 6:17 | 6:16 | 6:14 | 6:12 | 6:11 | 6:09 | 6:07 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 14.2 | 4:38 | 6:49 |
| 2 | 14.2 | 4:39 | 6:48 |
| 3 | 14.1 | 4:40 | 6:47 |
| 4 | 14.1 | 4:41 | 6:46 |
| 5 | 14.0 | 4:42 | 6:45 |
| 6 | 14.0 | 4:43 | 6:44 |
| 7 | 14.0 | 4:44 | 6:42 |
| 8 | 13.9 | 4:45 | 6:41 |
| 9 | 13.9 | 4:46 | 6:40 |
| 10 | 13.9 | 4:47 | 6:39 |
| 11 | 13.8 | 4:48 | 6:37 |
| 12 | 13.8 | 4:49 | 6:36 |
| 13 | 13.7 | 4:50 | 6:35 |
| 14 | 13.7 | 4:51 | 6:33 |
| 15 | 13.7 | 4:52 | 6:32 |
| 16 | 13.6 | 4:53 | 6:31 |
| 17 | 13.6 | 4:54 | 6:29 |
| 18 | 13.5 | 4:55 | 6:28 |
| 19 | 13.5 | 4:56 | 6:26 |
| 20 | 13.5 | 4:57 | 6:25 |
| 21 | 13.4 | 4:58 | 6:23 |
| 22 | 13.4 | 4:59 | 6:22 |
| 23 | 13.3 | 5:00 | 6:20 |
| 24 | 13.3 | 5:01 | 6:19 |
| 25 | 13.3 | 5:02 | 6:17 |
| 26 | 13.2 | 5:03 | 6:16 |
| 27 | 13.2 | 5:04 | 6:14 |
| 28 | 13.1 | 5:05 | 6:12 |
| 29 | 13.1 | 5:06 | 6:11 |
| 30 | 13.0 | 5:07 | 6:09 |
| 31 | 13.0 | 5:08 | 6:07 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 4.42 kWh/m².
For context, solar energy here swings from a low near 1.7 kWh/m² to a high of 5.42 kWh/m² in May across the year — August's 4.42 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) | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.6 | 4.6 | 4.6 | 4.5 | 4.5 | 4.5 | 4.5 | 4.4 | 4.4 | 4.4 | 4.4 | 4.3 | 4.3 | 4.3 | 4.3 | 4.3 | 4.2 | 4.2 | 4.2 | 4.2 | 4.2 | 4.1 | 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 | 4.7 | Bright |
| 2 | 4.7 | Bright |
| 3 | 4.7 | Bright |
| 4 | 4.7 | Bright |
| 5 | 4.7 | Bright |
| 6 | 4.7 | Bright |
| 7 | 4.7 | Bright |
| 8 | 4.6 | Bright |
| 9 | 4.6 | Bright |
| 10 | 4.6 | Bright |
| 11 | 4.5 | Bright |
| 12 | 4.5 | Bright |
| 13 | 4.5 | Bright |
| 14 | 4.5 | Bright |
| 15 | 4.4 | Bright |
| 16 | 4.4 | Bright |
| 17 | 4.4 | Bright |
| 18 | 4.4 | Bright |
| 19 | 4.3 | Bright |
| 20 | 4.3 | Bright |
| 21 | 4.3 | Bright |
| 22 | 4.3 | Bright |
| 23 | 4.3 | Bright |
| 24 | 4.2 | Bright |
| 25 | 4.2 | Bright |
| 26 | 4.2 | Bright |
| 27 | 4.2 | Bright |
| 28 | 4.2 | Bright |
| 29 | 4.1 | Bright |
| 30 | 4.1 | Bright |
| 31 | 4.1 | Bright |
Hazard calendar for Hirakawa
In August, Hirakawa sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Hirakawa sits in the Pacific typhoon belt; the season peaks July–October.
Is August a good time to visit Hirakawa?
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 Hirakawa for sightseeing.
What to pack for Hirakawa in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Hirakawa sees daytime highs around 26°C and nights near 19°C. Pack rain gear. Worth having: light clothes. About 16 days see rain.
Sea temperature near Hirakawa in August
The nearest coast averages about 23°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 41 km away) is warmest in August at about 23°C and coldest in March near 8°C.
It's comfortable for a long swim from Jul 24 to Oct 7 — about 2.5 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 10 | 8 | 8 | 8 | 11 | 15 | 19 | 23 | 22 | 19 | 15 | 12 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Refreshing | Refreshing | Cool | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 10 | Bracing |
| Feb | 8 | Bracing |
| Mar | 8 | Bracing |
| Apr | 8 | Bracing |
| May | 11 | Bracing |
| Jun | 15 | Cool |
| Jul | 19 | Cool |
| Aug | 23 | Refreshing |
| Sep | 22 | Refreshing |
| Oct | 19 | Cool |
| Nov | 15 | Cool |
| Dec | 12 | Bracing |
UV index in Hirakawa 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 Hirakawa peaks around August 19 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (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) | 2 | 3 | 3 | 6 | 8 | 8 | 5 | 9 | 7 | 4 | 2 | 2 |
| Level | Low | Moderate | Moderate | High | Very high | Very high | Moderate | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 2 | Low |
| Feb | 3 | Moderate |
| Mar | 3 | Moderate |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 8 | Very high |
| Jul | 5 | Moderate |
| Aug | 9 | Very high |
| Sep | 7 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Moderate |
| Dec | 2 | Low |
Air quality in Hirakawa 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 Hirakawa is worst in April — around 20 µg/m³ PM2.5 (moderate), about 2.4× 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) | 9 | 13 | 18 | 20 | 18 | 13 | 12 | 10 | 10 | 10 | 9 | 8 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 9 | Good |
| Feb | 13 | Moderate |
| Mar | 18 | Moderate |
| Apr | 20 | Moderate |
| May | 18 | Moderate |
| Jun | 13 | Moderate |
| Jul | 12 | Good |
| Aug | 10 | Good |
| Sep | 10 | Good |
| Oct | 10 | Good |
| Nov | 9 | Good |
| Dec | 8 | Good |
Where is Hirakawa?
Hirakawa sits at 40.6°N, 140.6°E, 46 m above sea level, in Japan. The nearest listed city is Kuroishi, 7.0 km away.
Topography around Hirakawa
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Hirakawa.
Within 3 km, the terrain around Hirakawa has only modest variations in elevation — a maximum elevation change of 131 m around an average of 49 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 976 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,616 m.
The land around Hirakawa is covered by cropland (54%) and trees (23%) within 3 km, trees (65%) and cropland (21%) within 16 km, and trees (59%) and water (31%) 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 Hirakawa (40.5873°, 140.5711°, elevation 46 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).