Oyama weather in August
In August, Oyama sees average daytime highs of 30°C and overnight lows near 23°C, with 161 mm of rain across 16.3 wet days and about 13.4 hours of daylight. It is the 1st-warmest and 5th-wettest month of the year here.
Highs ease over the month, from about 31°C in the first days to 29°C by the end. The sky is clear or mostly clear about 18% of the time in August, and the air most often feels oppressive.
Daylight stretches from about 13 h 54 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Oyama's 9th-clearest and 9th-windiest month. For the whole year in context, see Oyama's year-round climate.
- Daytime high
- 30°
- 1st warmest
- Overnight low
- 23°
- 12th coldest
- Rainfall
- 161 mm
- 16.3 wet days
- Daylight
- 13 h 24 min
- 5:03 AM – 6:27 PM
- Cloud cover
- 69%
- 9th clearest
- Wind
- 7 km/h
- 9th windiest
- Solar energy
- 4.46 kWh/m²
- Travel score
- 4.1
- out of 10
Oyama is city in Tochigi prefecture, Japan.
- Density
- 976/km²
- people per km²
- Founded
- 1954
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in August
Highs ease over the month, from about 31°C in the first days to 29°C by the end.
A typical August day in Oyama reaches about 30°C in the afternoon and slips back to 23°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 34°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) | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 |
| Avg low (°C) | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 22 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 31 | 24 |
| 2 | 31 | 24 |
| 3 | 31 | 24 |
| 4 | 31 | 24 |
| 5 | 31 | 24 |
| 6 | 31 | 24 |
| 7 | 31 | 24 |
| 8 | 31 | 24 |
| 9 | 31 | 24 |
| 10 | 31 | 24 |
| 11 | 31 | 24 |
| 12 | 31 | 24 |
| 13 | 31 | 24 |
| 14 | 31 | 24 |
| 15 | 31 | 24 |
| 16 | 31 | 24 |
| 17 | 30 | 23 |
| 18 | 30 | 23 |
| 19 | 30 | 23 |
| 20 | 30 | 23 |
| 21 | 30 | 23 |
| 22 | 30 | 23 |
| 23 | 30 | 23 |
| 24 | 30 | 23 |
| 25 | 30 | 23 |
| 26 | 30 | 23 |
| 27 | 29 | 23 |
| 28 | 29 | 23 |
| 29 | 29 | 23 |
| 30 | 29 | 23 |
| 31 | 29 | 22 |
How August really feels in Oyama
Once humidity and wind are folded in, August averages 27 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Oyama weather by month
How August compares with the rest of the year at a glance. August is the 1st-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 | 8° / -0° | 55 | 6 | 1.8 | 9.8 | 1.7 |
| Feb | 9° / 0° | 54 | 6.9 | 2.2 | 10.6 | 2.1 |
| Mar | 13° / 3° | 106 | 11.6 | 1.3 | 11.7 | 3.5 |
| Apr | 18° / 8° | 120 | 12.6 | 0.2 | 12.9 | 5.4 |
| May | 23° / 14° | 153 | 13.7 | 0 | 13.9 | 6.1 |
| Jun | 25° / 18° | 177 | 16.5 | 0 | 14.4 | 5.3 |
| Jul | 29° / 22° | 209 | 18.7 | 0 | 14.2 | 4.3 |
| Aug | 30° / 23° | 161 | 16.3 | 0 | 13.4 | 4.1 |
| Sep | 26° / 20° | 206 | 16.2 | 0 | 12.2 | 5.3 |
| Oct | 21° / 14° | 200 | 13.9 | 0 | 11.1 | 5.9 |
| Nov | 16° / 7° | 88 | 9.4 | 0 | 10.1 | 5.0 |
| Dec | 11° / 2° | 54 | 6.8 | 0.4 | 9.6 | 2.9 |
Cloud cover in August
The sky is clear or mostly clear about 18% of the time in August.
Beyond those clear spells, partly cloudy skies cover about 17% of August, with mostly cloudy or overcast conditions the remaining 65%.
| 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 (%) | 34 | 35 | 35 | 35 | 36 | 36 | 35 | 36 | 36 | 36 | 35 | 35 | 35 | 36 | 35 | 35 | 35 | 35 | 34 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 35 | 36 |
| Cloudier (%) | 66 | 65 | 65 | 65 | 64 | 64 | 65 | 64 | 64 | 64 | 65 | 65 | 65 | 64 | 65 | 65 | 65 | 65 | 66 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 65 | 64 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 34 | 66 |
| 2 | 35 | 65 |
| 3 | 35 | 65 |
| 4 | 35 | 65 |
| 5 | 36 | 64 |
| 6 | 36 | 64 |
| 7 | 35 | 65 |
| 8 | 36 | 64 |
| 9 | 36 | 64 |
| 10 | 36 | 64 |
| 11 | 35 | 65 |
| 12 | 35 | 65 |
| 13 | 35 | 65 |
| 14 | 36 | 64 |
| 15 | 35 | 65 |
| 16 | 35 | 65 |
| 17 | 35 | 65 |
| 18 | 35 | 65 |
| 19 | 34 | 66 |
| 20 | 35 | 65 |
| 21 | 35 | 65 |
| 22 | 35 | 65 |
| 23 | 35 | 65 |
| 24 | 35 | 65 |
| 25 | 35 | 65 |
| 26 | 35 | 65 |
| 27 | 35 | 65 |
| 28 | 35 | 65 |
| 29 | 35 | 65 |
| 30 | 35 | 65 |
| 31 | 36 | 64 |
Chance of precipitation in August
Oyama gets around 161 mm of rain over 16.3 wet days in August. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 53% 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 (%) | 51 | 51 | 51 | 51 | 51 | 51 | 51 | 52 | 52 | 52 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 54 | 54 |
| Rain chance (%) | |
|---|---|
| 1 | 51 |
| 2 | 51 |
| 3 | 51 |
| 4 | 51 |
| 5 | 51 |
| 6 | 51 |
| 7 | 51 |
| 8 | 52 |
| 9 | 52 |
| 10 | 52 |
| 11 | 53 |
| 12 | 53 |
| 13 | 53 |
| 14 | 53 |
| 15 | 53 |
| 16 | 53 |
| 17 | 53 |
| 18 | 53 |
| 19 | 53 |
| 20 | 53 |
| 21 | 53 |
| 22 | 53 |
| 23 | 53 |
| 24 | 53 |
| 25 | 53 |
| 26 | 53 |
| 27 | 53 |
| 28 | 53 |
| 29 | 53 |
| 30 | 54 |
| 31 | 54 |
Humidity in August
Most of August feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the oppressive band about 55% of days. Sticky, muggy-or-worse air turns up on roughly 93% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Comfortable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 |
| Humid (%) | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 9 | 10 |
| Muggy (%) | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 15 | 15 | 16 | 16 | 17 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 28 | 29 | 30 | 31 | 32 | 34 |
| Oppressive (%) | 57 | 58 | 57 | 57 | 57 | 57 | 58 | 57 | 57 | 58 | 56 | 57 | 56 | 57 | 57 | 57 | 55 | 55 | 55 | 54 | 53 | 53 | 54 | 54 | 53 | 52 | 52 | 51 | 51 | 51 | 49 |
| Miserable (%) | 24 | 24 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 23 | 23 | 22 | 22 | 21 | 20 | 20 | 19 | 18 | 17 | 17 | 16 | 15 | 13 | 12 | 11 | 10 | 10 | 9 | 8 | 7 | 7 |
| Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|
| 1 | 0 | 6 | 13 | 57 | 24 |
| 2 | 0 | 5 | 13 | 58 | 24 |
| 3 | 0 | 5 | 13 | 57 | 25 |
| 4 | 0 | 5 | 13 | 57 | 25 |
| 5 | 0 | 5 | 13 | 57 | 25 |
| 6 | 0 | 5 | 13 | 57 | 25 |
| 7 | 0 | 5 | 13 | 58 | 24 |
| 8 | 0 | 5 | 14 | 57 | 24 |
| 9 | 0 | 5 | 14 | 57 | 24 |
| 10 | 0 | 5 | 14 | 58 | 23 |
| 11 | 1 | 5 | 15 | 56 | 23 |
| 12 | 1 | 5 | 15 | 57 | 22 |
| 13 | 1 | 5 | 16 | 56 | 22 |
| 14 | 1 | 5 | 16 | 57 | 21 |
| 15 | 1 | 5 | 17 | 57 | 20 |
| 16 | 1 | 5 | 17 | 57 | 20 |
| 17 | 2 | 6 | 18 | 55 | 19 |
| 18 | 2 | 6 | 19 | 55 | 18 |
| 19 | 2 | 6 | 20 | 55 | 17 |
| 20 | 2 | 6 | 21 | 54 | 17 |
| 21 | 2 | 7 | 22 | 53 | 16 |
| 22 | 2 | 7 | 23 | 53 | 15 |
| 23 | 2 | 7 | 24 | 54 | 13 |
| 24 | 2 | 7 | 25 | 54 | 12 |
| 25 | 2 | 8 | 26 | 53 | 11 |
| 26 | 2 | 8 | 28 | 52 | 10 |
| 27 | 1 | 8 | 29 | 52 | 10 |
| 28 | 1 | 9 | 30 | 51 | 9 |
| 29 | 1 | 9 | 31 | 51 | 8 |
| 30 | 1 | 9 | 32 | 51 | 7 |
| 31 | 1 | 10 | 34 | 49 | 7 |
Wind in August
Winds average 7 km/h in August.
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 13 h 54 min at the start of August to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 66 minutes over August. Sunrise moves from 4:51 AM to 5:15 AM, and sunset from 6:43 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) | 13.9 | 13.8 | 13.8 | 13.8 | 13.7 | 13.7 | 13.7 | 13.7 | 13.6 | 13.6 | 13.6 | 13.5 | 13.5 | 13.5 | 13.4 | 13.4 | 13.4 | 13.3 | 13.3 | 13.3 | 13.2 | 13.2 | 13.1 | 13.1 | 13.1 | 13.0 | 13.0 | 13.0 | 12.9 | 12.9 | 12.8 |
| Sunrise (AM) | 4:51 | 4:52 | 4:52 | 4:53 | 4:54 | 4:55 | 4:56 | 4:57 | 4:57 | 4:58 | 4:59 | 5:00 | 5:01 | 5:01 | 5:02 | 5:03 | 5:04 | 5:05 | 5:06 | 5:06 | 5:07 | 5:08 | 5:09 | 5:10 | 5:11 | 5:11 | 5:12 | 5:13 | 5:14 | 5:15 | 5:15 |
| Sunset (PM) | 6:43 | 6:42 | 6:41 | 6:40 | 6:39 | 6:38 | 6:37 | 6:36 | 6:35 | 6:34 | 6:33 | 6:31 | 6:30 | 6:29 | 6:28 | 6:27 | 6:25 | 6:24 | 6:23 | 6:22 | 6:20 | 6:19 | 6:18 | 6:16 | 6:15 | 6:13 | 6:12 | 6:11 | 6:09 | 6:08 | 6:06 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.9 | 4:51 | 6:43 |
| 2 | 13.8 | 4:52 | 6:42 |
| 3 | 13.8 | 4:52 | 6:41 |
| 4 | 13.8 | 4:53 | 6:40 |
| 5 | 13.7 | 4:54 | 6:39 |
| 6 | 13.7 | 4:55 | 6:38 |
| 7 | 13.7 | 4:56 | 6:37 |
| 8 | 13.7 | 4:57 | 6:36 |
| 9 | 13.6 | 4:57 | 6:35 |
| 10 | 13.6 | 4:58 | 6:34 |
| 11 | 13.6 | 4:59 | 6:33 |
| 12 | 13.5 | 5:00 | 6:31 |
| 13 | 13.5 | 5:01 | 6:30 |
| 14 | 13.5 | 5:01 | 6:29 |
| 15 | 13.4 | 5:02 | 6:28 |
| 16 | 13.4 | 5:03 | 6:27 |
| 17 | 13.4 | 5:04 | 6:25 |
| 18 | 13.3 | 5:05 | 6:24 |
| 19 | 13.3 | 5:06 | 6:23 |
| 20 | 13.3 | 5:06 | 6:22 |
| 21 | 13.2 | 5:07 | 6:20 |
| 22 | 13.2 | 5:08 | 6:19 |
| 23 | 13.1 | 5:09 | 6:18 |
| 24 | 13.1 | 5:10 | 6:16 |
| 25 | 13.1 | 5:11 | 6:15 |
| 26 | 13.0 | 5:11 | 6:13 |
| 27 | 13.0 | 5:12 | 6:12 |
| 28 | 13.0 | 5:13 | 6:11 |
| 29 | 12.9 | 5:14 | 6:09 |
| 30 | 12.9 | 5:15 | 6:08 |
| 31 | 12.8 | 5:15 | 6:06 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 4.46 kWh/m².
For context, solar energy here swings from a low near 2.38 kWh/m² to a high of 5.07 kWh/m² in May across the year — August's 4.46 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) | 4.8 | 4.8 | 4.8 | 4.8 | 4.7 | 4.7 | 4.7 | 4.7 | 4.7 | 4.6 | 4.6 | 4.6 | 4.5 | 4.5 | 4.5 | 4.4 | 4.4 | 4.4 | 4.3 | 4.3 | 4.3 | 4.3 | 4.2 | 4.2 | 4.2 | 4.1 | 4.1 | 4.1 | 4.0 | 4.0 | 4.0 |
| 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 | 4.8 | Bright |
| 2 | 4.8 | Bright |
| 3 | 4.8 | Bright |
| 4 | 4.8 | Bright |
| 5 | 4.7 | Bright |
| 6 | 4.7 | Bright |
| 7 | 4.7 | Bright |
| 8 | 4.7 | Bright |
| 9 | 4.7 | Bright |
| 10 | 4.6 | Bright |
| 11 | 4.6 | Bright |
| 12 | 4.6 | Bright |
| 13 | 4.5 | Bright |
| 14 | 4.5 | Bright |
| 15 | 4.5 | 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 | 4.2 | Bright |
| 24 | 4.2 | Bright |
| 25 | 4.2 | Bright |
| 26 | 4.1 | Bright |
| 27 | 4.1 | Bright |
| 28 | 4.1 | Bright |
| 29 | 4.0 | Bright |
| 30 | 4.0 | Bright |
| 31 | 4.0 | Bright |
Is August a good time to visit Oyama?
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 Oyama for sightseeing.
What to pack for Oyama in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Oyama sees daytime highs around 30°C and nights near 23°C. Pack light clothes and rain gear. About 16 days see rain.
UV index in Oyama 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 Oyama peaks around July 17 at about 9 (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 | 8 | 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 | 8 | Very high |
| Oct | 6 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Moderate |
Air quality in Oyama 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 Oyama 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 Oyama?
Oyama sits at 36.3°N, 139.8°E, 41 m above sea level, in Japan. The nearest listed city is Yūki, 7.0 km away.
Topography around Oyama
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Oyama.
Within 3 km, the terrain around Oyama has only modest variations in elevation — a maximum elevation change of 39 m around an average of 33 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 393 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,553 m.
The land around Oyama is covered by artificial surfaces (62%) within 3 km, cropland (47%) and artificial surfaces (30%) within 16 km, and trees (48%), artificial surfaces (25%) and cropland (21%) 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 Oyama (36.3°, 139.8°, elevation 41 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. 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).