Oga weather in December
In December, Oga sees average daytime highs of 7°C and overnight lows near 4°C, with 203 mm of precipitation across 24.8 wet days and about 9.2 hours of daylight. It is the 9th-warmest and 1st-wettest month of the year here.
Highs ease over the month, from about 9°C in the first days to 5°C by the end. The sky is clear or mostly clear about 5% of the time in December, and the air most often feels dry.
Daylight stretches from about 9 h 24 min at the start of December to 9 h 12 min by month's end. Set against the rest of the year, December is Oga's 11th-clearest and 2nd-windiest month. For the whole year in context, see Oga's year-round climate.
- Daytime high
- 7°
- 9th warmest
- Overnight low
- 4°
- 4th coldest
- Precipitation
- 203 mm
- 24.8 wet days
- Daylight
- 9 h 12 min
- 7:01 AM – 4:12 PM
- Cloud cover
- 74%
- 11th clearest
- Wind
- 31 km/h
- 2nd windiest
- Solar energy
- 1.57 kWh/m²
- Travel score
- 0.6
- out of 10
Oga is city in Akita Prefecture, Japan.
- Density
- 104/km²
- people per km²
- Founded
- 2005
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Highs ease over the month, from about 9°C in the first days to 5°C by the end.
A typical December day in Oga reaches about 7°C in the afternoon and slips back to 4°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 3°C and 11°C. Set against its neighbours, December runs about 5°C cooler than November and about 3°C warmer than January.
| 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) | 9 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 |
| Avg low (°C) | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 9 | 6 |
| 2 | 9 | 6 |
| 3 | 9 | 5 |
| 4 | 9 | 5 |
| 5 | 8 | 5 |
| 6 | 8 | 5 |
| 7 | 8 | 5 |
| 8 | 8 | 5 |
| 9 | 8 | 4 |
| 10 | 8 | 4 |
| 11 | 7 | 4 |
| 12 | 7 | 4 |
| 13 | 7 | 4 |
| 14 | 7 | 4 |
| 15 | 7 | 4 |
| 16 | 7 | 4 |
| 17 | 7 | 3 |
| 18 | 7 | 3 |
| 19 | 6 | 3 |
| 20 | 6 | 3 |
| 21 | 6 | 3 |
| 22 | 6 | 3 |
| 23 | 6 | 3 |
| 24 | 6 | 3 |
| 25 | 6 | 3 |
| 26 | 6 | 3 |
| 27 | 6 | 3 |
| 28 | 5 | 2 |
| 29 | 5 | 2 |
| 30 | 5 | 2 |
| 31 | 5 | 2 |
How December really feels in Oga
Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 26 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
The story in December is cold — wind chill drags the overnight "feels like" below the raw low.
Oga weather by month
How December compares with the rest of the year at a glance. December is the 9th-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 | 4° / 1° | 169 | 25.4 | 17.9 | 9.5 | 0.0 |
| Feb | 4° / 1° | 119 | 20.5 | 14.2 | 10.4 | 0.0 |
| Mar | 6° / 3° | 108 | 17.2 | 6.7 | 11.7 | 0.5 |
| Apr | 10° / 7° | 98 | 12.7 | 0.3 | 13 | 2.1 |
| May | 14° / 12° | 117 | 12.6 | 0 | 14.2 | 4.1 |
| Jun | 19° / 17° | 120 | 11 | 0 | 14.8 | 5.9 |
| Jul | 23° / 21° | 190 | 14.4 | 0 | 14.5 | 6.0 |
| Aug | 26° / 23° | 178 | 14.1 | 0 | 13.6 | 6.2 |
| Sep | 23° / 21° | 180 | 14 | 0 | 12.3 | 6.0 |
| Oct | 18° / 15° | 166 | 15.3 | 0 | 10.9 | 5.0 |
| Nov | 12° / 9° | 174 | 19.6 | 1.2 | 9.8 | 2.5 |
| Dec | 7° / 4° | 203 | 24.8 | 10.2 | 9.2 | 0.6 |
Cloud cover in December
The sky is clear or mostly clear about 5% of the time in December.
Beyond those clear spells, partly cloudy skies cover about 19% of December, with mostly cloudy or overcast conditions the remaining 75%.
| 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 (%) | 26 | 26 | 26 | 25 | 24 | 24 | 24 | 24 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 25 | 25 | 25 | 26 | 26 | 25 |
| Cloudier (%) | 74 | 74 | 74 | 75 | 76 | 76 | 76 | 76 | 75 | 76 | 76 | 76 | 76 | 76 | 76 | 76 | 76 | 75 | 75 | 75 | 75 | 75 | 75 | 75 | 76 | 75 | 75 | 75 | 74 | 74 | 75 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 26 | 74 |
| 2 | 26 | 74 |
| 3 | 26 | 74 |
| 4 | 25 | 75 |
| 5 | 24 | 76 |
| 6 | 24 | 76 |
| 7 | 24 | 76 |
| 8 | 24 | 76 |
| 9 | 25 | 75 |
| 10 | 24 | 76 |
| 11 | 24 | 76 |
| 12 | 24 | 76 |
| 13 | 24 | 76 |
| 14 | 24 | 76 |
| 15 | 24 | 76 |
| 16 | 24 | 76 |
| 17 | 24 | 76 |
| 18 | 25 | 75 |
| 19 | 25 | 75 |
| 20 | 25 | 75 |
| 21 | 25 | 75 |
| 22 | 25 | 75 |
| 23 | 25 | 75 |
| 24 | 25 | 75 |
| 25 | 24 | 76 |
| 26 | 25 | 75 |
| 27 | 25 | 75 |
| 28 | 25 | 75 |
| 29 | 26 | 74 |
| 30 | 26 | 74 |
| 31 | 25 | 75 |
Chance of precipitation in December
Oga gets around 203 mm of rain and snow over 24.8 wet days in December, the wettest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 80% and peaks near 85% on the wettest days, and about 10 days bring snow. The odds climb toward the end of the month.
| 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 (%) | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 77 | 78 | 79 | 80 | 80 | 81 | 81 | 82 | 82 | 82 | 82 | 82 | 82 | 83 | 83 | 83 | 83 | 84 | 84 | 84 | 85 | 85 | 85 | 85 |
| Snow chance (%) | 12 | 14 | 15 | 17 | 19 | 20 | 22 | 24 | 26 | 28 | 30 | 31 | 32 | 34 | 35 | 35 | 36 | 37 | 38 | 38 | 39 | 39 | 40 | 41 | 41 | 42 | 43 | 44 | 45 | 46 | 47 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 71 | 12 |
| 2 | 72 | 14 |
| 3 | 73 | 15 |
| 4 | 74 | 17 |
| 5 | 75 | 19 |
| 6 | 76 | 20 |
| 7 | 77 | 22 |
| 8 | 77 | 24 |
| 9 | 78 | 26 |
| 10 | 79 | 28 |
| 11 | 80 | 30 |
| 12 | 80 | 31 |
| 13 | 81 | 32 |
| 14 | 81 | 34 |
| 15 | 82 | 35 |
| 16 | 82 | 35 |
| 17 | 82 | 36 |
| 18 | 82 | 37 |
| 19 | 82 | 38 |
| 20 | 82 | 38 |
| 21 | 83 | 39 |
| 22 | 83 | 39 |
| 23 | 83 | 40 |
| 24 | 83 | 41 |
| 25 | 84 | 41 |
| 26 | 84 | 42 |
| 27 | 84 | 43 |
| 28 | 85 | 44 |
| 29 | 85 | 45 |
| 30 | 85 | 46 |
| 31 | 85 | 47 |
Humidity in December
Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, December 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 | 100 | 100 | 100 |
| Dry (%) | |
|---|---|
| 1 | 100 |
| 2 | 100 |
| 3 | 100 |
| 4 | 100 |
| 5 | 100 |
| 6 | 100 |
| 7 | 100 |
| 8 | 100 |
| 9 | 100 |
| 10 | 100 |
| 11 | 100 |
| 12 | 100 |
| 13 | 100 |
| 14 | 100 |
| 15 | 100 |
| 16 | 100 |
| 17 | 100 |
| 18 | 100 |
| 19 | 100 |
| 20 | 100 |
| 21 | 100 |
| 22 | 100 |
| 23 | 100 |
| 24 | 100 |
| 25 | 100 |
| 26 | 100 |
| 27 | 100 |
| 28 | 100 |
| 29 | 100 |
| 30 | 100 |
| 31 | 100 |
Wind in December
Winds average 31 km/h in December.
Across December, daily wind ranges from about 29 km/h on the calmest days to 33 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) | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 33 | 33 | 33 | 33 |
| Feels | breezy | breezy | breezy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy | windy |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 29 | breezy |
| 2 | 29 | breezy |
| 3 | 29 | breezy |
| 4 | 29 | windy |
| 5 | 29 | windy |
| 6 | 30 | windy |
| 7 | 30 | windy |
| 8 | 30 | windy |
| 9 | 30 | windy |
| 10 | 30 | windy |
| 11 | 30 | windy |
| 12 | 31 | windy |
| 13 | 31 | windy |
| 14 | 31 | windy |
| 15 | 31 | windy |
| 16 | 31 | windy |
| 17 | 31 | windy |
| 18 | 31 | windy |
| 19 | 32 | windy |
| 20 | 32 | windy |
| 21 | 32 | windy |
| 22 | 32 | windy |
| 23 | 32 | windy |
| 24 | 32 | windy |
| 25 | 32 | windy |
| 26 | 32 | windy |
| 27 | 32 | windy |
| 28 | 33 | windy |
| 29 | 33 | windy |
| 30 | 33 | windy |
| 31 | 33 | windy |
Sunrise & sunset in December
Daylight runs from about 9 h 24 min at the start of December to 9 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 12 minutes over December. Sunrise moves from 6:49 AM to 7:07 AM, and sunset from 4:12 PM to 4:20 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) | 9.4 | 9.4 | 9.3 | 9.3 | 9.3 | 9.3 | 9.3 | 9.3 | 9.3 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 | 9.2 |
| Sunrise (AM) | 6:49 | 6:50 | 6:51 | 6:52 | 6:53 | 6:54 | 6:54 | 6:55 | 6:56 | 6:57 | 6:58 | 6:58 | 6:59 | 7:00 | 7:01 | 7:01 | 7:02 | 7:02 | 7:03 | 7:04 | 7:04 | 7:05 | 7:05 | 7:05 | 7:06 | 7:06 | 7:06 | 7:07 | 7:07 | 7:07 | 7:07 |
| Sunset (PM) | 4:12 | 4:12 | 4:11 | 4:11 | 4:11 | 4:11 | 4:11 | 4:11 | 4:11 | 4:11 | 4:11 | 4:11 | 4:12 | 4:12 | 4:12 | 4:12 | 4:13 | 4:13 | 4:13 | 4:14 | 4:14 | 4:15 | 4:15 | 4:16 | 4:16 | 4:17 | 4:17 | 4:18 | 4:19 | 4:19 | 4:20 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 9.4 | 6:49 | 4:12 |
| 2 | 9.4 | 6:50 | 4:12 |
| 3 | 9.3 | 6:51 | 4:11 |
| 4 | 9.3 | 6:52 | 4:11 |
| 5 | 9.3 | 6:53 | 4:11 |
| 6 | 9.3 | 6:54 | 4:11 |
| 7 | 9.3 | 6:54 | 4:11 |
| 8 | 9.3 | 6:55 | 4:11 |
| 9 | 9.3 | 6:56 | 4:11 |
| 10 | 9.2 | 6:57 | 4:11 |
| 11 | 9.2 | 6:58 | 4:11 |
| 12 | 9.2 | 6:58 | 4:11 |
| 13 | 9.2 | 6:59 | 4:12 |
| 14 | 9.2 | 7:00 | 4:12 |
| 15 | 9.2 | 7:01 | 4:12 |
| 16 | 9.2 | 7:01 | 4:12 |
| 17 | 9.2 | 7:02 | 4:13 |
| 18 | 9.2 | 7:02 | 4:13 |
| 19 | 9.2 | 7:03 | 4:13 |
| 20 | 9.2 | 7:04 | 4:14 |
| 21 | 9.2 | 7:04 | 4:14 |
| 22 | 9.2 | 7:05 | 4:15 |
| 23 | 9.2 | 7:05 | 4:15 |
| 24 | 9.2 | 7:05 | 4:16 |
| 25 | 9.2 | 7:06 | 4:16 |
| 26 | 9.2 | 7:06 | 4:17 |
| 27 | 9.2 | 7:06 | 4:17 |
| 28 | 9.2 | 7:07 | 4:18 |
| 29 | 9.2 | 7:07 | 4:19 |
| 30 | 9.2 | 7:07 | 4:19 |
| 31 | 9.2 | 7:07 | 4:20 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 1.57 kWh/m² — the year's lowest.
For context, solar energy here swings from a low near 1.57 kWh/m² to a high of 5.86 kWh/m² in June across the year — December's 1.57 kWh/m² sits near the bottom.
| 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) | 1.7 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.6 | 1.7 | 1.7 | 1.7 | 1.7 |
| Level | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim | Dim |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 1.7 | Dim |
| 2 | 1.6 | Dim |
| 3 | 1.6 | Dim |
| 4 | 1.6 | Dim |
| 5 | 1.6 | Dim |
| 6 | 1.6 | Dim |
| 7 | 1.6 | Dim |
| 8 | 1.6 | Dim |
| 9 | 1.6 | Dim |
| 10 | 1.6 | Dim |
| 11 | 1.6 | Dim |
| 12 | 1.6 | Dim |
| 13 | 1.6 | Dim |
| 14 | 1.6 | Dim |
| 15 | 1.6 | Dim |
| 16 | 1.6 | Dim |
| 17 | 1.6 | Dim |
| 18 | 1.6 | Dim |
| 19 | 1.6 | Dim |
| 20 | 1.6 | Dim |
| 21 | 1.6 | Dim |
| 22 | 1.6 | Dim |
| 23 | 1.6 | Dim |
| 24 | 1.6 | Dim |
| 25 | 1.6 | Dim |
| 26 | 1.6 | Dim |
| 27 | 1.6 | Dim |
| 28 | 1.7 | Dim |
| 29 | 1.7 | Dim |
| 30 | 1.7 | Dim |
| 31 | 1.7 | Dim |
Hazard calendar for Oga
In December, Oga sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Oga sits in the Pacific typhoon belt; the season peaks July–October.
Is December a good time to visit Oga?
Our two travel scores rate December for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
December is a weaker month for outdoor sightseeing in Oga.
What to pack for Oga in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Oga sees daytime highs around 7°C and nights near 4°C. Pack a warm layer, rain gear and a windbreaker. Worth having: a heavy coat. About 25 days see rain.
Sea temperature near Oga in December
The nearest coast averages about 14°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in August at about 25°C and coldest in March near 9°C.
It's comfortable for a long swim from Jun 30 to Oct 23 — about 3.8 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 11 | 9 | 9 | 10 | 14 | 18 | 22 | 25 | 24 | 21 | 17 | 14 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Bracing | Cool | Refreshing | Warm | Warm | Refreshing | Cool | Bracing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 11 | Bracing |
| Feb | 9 | Bracing |
| Mar | 9 | Bracing |
| Apr | 10 | Bracing |
| May | 14 | Bracing |
| Jun | 18 | Cool |
| Jul | 22 | Refreshing |
| Aug | 25 | Warm |
| Sep | 24 | Warm |
| Oct | 21 | Refreshing |
| Nov | 17 | Cool |
| Dec | 14 | Bracing |
UV index in Oga in December
Clear-sky midday UV in December peaks around 1. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Oga peaks around August 19 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 1 (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) | 1 | 2 | 3 | 6 | 8 | 7 | 5 | 9 | 7 | 4 | 2 | 1 |
| Level | Low | Moderate | Moderate | High | Very high | Very high | Moderate | Very high | High | Moderate | Moderate | Low |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 1 | Low |
| Feb | 2 | Moderate |
| Mar | 3 | Moderate |
| Apr | 6 | High |
| May | 8 | Very high |
| Jun | 7 | Very high |
| Jul | 5 | Moderate |
| Aug | 9 | Very high |
| Sep | 7 | High |
| Oct | 4 | Moderate |
| Nov | 2 | Moderate |
| Dec | 1 | Low |
Air quality in Oga in December
Average fine-particle pollution (PM2.5) through the year — so you can see where December falls, not just the annual average.
Air quality in Oga is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (September, 9 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) | 11 | 15 | 20 | 21 | 18 | 13 | 11 | 10 | 9 | 10 | 10 | 10 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 15 | Moderate |
| Mar | 20 | Moderate |
| Apr | 21 | Moderate |
| May | 18 | Moderate |
| Jun | 13 | Moderate |
| Jul | 11 | Good |
| Aug | 10 | Good |
| Sep | 9 | Good |
| Oct | 10 | Good |
| Nov | 10 | Good |
| Dec | 10 | Good |
Where is Oga?
Oga sits at 39.9°N, 139.8°E, 6 m above sea level, in Japan. The nearest listed city is Tennō, 11 km away.
Topography around Oga
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Oga.
Within 3 km, the terrain around Oga has only modest variations in elevation — a maximum elevation change of 112 m around an average of 15 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 713 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,449 m.
The land around Oga is covered by water (61%) and trees (27%) within 3 km, water (65%) and trees (22%) within 16 km, and trees (46%) and water (45%) 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 Oga (39.871°, 139.8493°, elevation 6 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).