Ōmiya weather in December
In December, Ōmiya sees average daytime highs of 10°C and overnight lows near 4°C, with 64 mm of precipitation across 7.6 wet days and about 9.5 hours of daylight. It is the 10th-warmest and 10th-wettest month of the year here.
Highs ease over the month, from about 12°C in the first days to 9°C by the end. The sky is clear or mostly clear about 57% of the time in December, and the air most often feels dry.
Daylight stretches from about 9 h 42 min at the start of December to 9 h 30 min by month's end. Set against the rest of the year, December is Ōmiya's 1st-clearest and 5th-windiest month. For the whole year in context, see Ōmiya's year-round climate.
- Daytime high
- 10°
- 10th warmest
- Overnight low
- 4°
- 4th coldest
- Precipitation
- 64 mm
- 7.6 wet days
- Daylight
- 9 h 30 min
- 6:49 AM – 4:20 PM
- Cloud cover
- 41%
- 1st clearest
- Wind
- 11 km/h
- 5th windiest
- Solar energy
- 2.36 kWh/m²
- Travel score
- 2.6
- out of 10
Ōmiya is city in Ibaraki Prefecture, Japan.
- Density
- 79/km²
- people per km²
- Founded
- 2004
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in December
Highs ease over the month, from about 12°C in the first days to 9°C by the end.
A typical December day in Ōmiya reaches about 10°C in the afternoon and slips back to 4°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 7°C and 13°C. Set against its neighbours, December runs about 5°C cooler than November and about 2°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) | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 8 |
| Avg low (°C) | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 12 | 7 |
| 2 | 12 | 6 |
| 3 | 12 | 6 |
| 4 | 12 | 6 |
| 5 | 12 | 6 |
| 6 | 11 | 6 |
| 7 | 11 | 6 |
| 8 | 11 | 5 |
| 9 | 11 | 5 |
| 10 | 11 | 5 |
| 11 | 11 | 5 |
| 12 | 10 | 5 |
| 13 | 10 | 5 |
| 14 | 10 | 4 |
| 15 | 10 | 4 |
| 16 | 10 | 4 |
| 17 | 10 | 4 |
| 18 | 10 | 4 |
| 19 | 10 | 4 |
| 20 | 9 | 4 |
| 21 | 9 | 4 |
| 22 | 9 | 4 |
| 23 | 9 | 4 |
| 24 | 9 | 3 |
| 25 | 9 | 3 |
| 26 | 9 | 3 |
| 27 | 9 | 3 |
| 28 | 9 | 3 |
| 29 | 9 | 3 |
| 30 | 9 | 3 |
| 31 | 8 | 3 |
How December really feels in Ōmiya
Once humidity and wind are folded in, December averages 0 days that feel above 32°C and 3 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.
Ōmiya weather by month
How December compares with the rest of the year at a glance. December is the 10th-warmest and 10th-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° / 2° | 63 | 7.3 | 1.5 | 9.8 | 1.4 |
| Feb | 8° / 2° | 63 | 7.3 | 2 | 10.6 | 1.5 |
| Mar | 11° / 4° | 115 | 12.5 | 1.2 | 11.7 | 2.7 |
| Apr | 16° / 9° | 121 | 11.9 | 0.2 | 12.9 | 4.5 |
| May | 20° / 14° | 144 | 12.5 | 0 | 13.9 | 5.8 |
| Jun | 23° / 18° | 151 | 14.7 | 0 | 14.4 | 5.6 |
| Jul | 27° / 22° | 178 | 16 | 0 | 14.2 | 5.4 |
| Aug | 28° / 23° | 131 | 14 | 0 | 13.4 | 5.4 |
| Sep | 25° / 20° | 179 | 14.7 | 0 | 12.2 | 5.8 |
| Oct | 20° / 15° | 196 | 12.7 | 0 | 11.1 | 5.9 |
| Nov | 15° / 9° | 98 | 9.5 | 0 | 10.1 | 4.7 |
| Dec | 10° / 4° | 64 | 7.6 | 0.3 | 9.5 | 2.6 |
Cloud cover in December
The sky is clear or mostly clear about 57% of the time in December, the clearest month of the year.
Beyond those clear spells, partly cloudy skies cover about 13% of December, with mostly cloudy or overcast conditions the remaining 30%. Skies tend to open up as the month goes on.
| 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 (%) | 60 | 60 | 61 | 62 | 62 | 63 | 65 | 65 | 67 | 68 | 68 | 70 | 70 | 71 | 71 | 71 | 72 | 73 | 73 | 74 | 74 | 75 | 75 | 75 | 76 | 77 | 77 | 77 | 77 | 77 | 78 |
| Cloudier (%) | 40 | 40 | 39 | 38 | 38 | 37 | 35 | 35 | 33 | 32 | 32 | 30 | 30 | 29 | 29 | 29 | 28 | 27 | 27 | 26 | 26 | 25 | 25 | 25 | 24 | 23 | 23 | 23 | 23 | 23 | 22 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 60 | 40 |
| 2 | 60 | 40 |
| 3 | 61 | 39 |
| 4 | 62 | 38 |
| 5 | 62 | 38 |
| 6 | 63 | 37 |
| 7 | 65 | 35 |
| 8 | 65 | 35 |
| 9 | 67 | 33 |
| 10 | 68 | 32 |
| 11 | 68 | 32 |
| 12 | 70 | 30 |
| 13 | 70 | 30 |
| 14 | 71 | 29 |
| 15 | 71 | 29 |
| 16 | 71 | 29 |
| 17 | 72 | 28 |
| 18 | 73 | 27 |
| 19 | 73 | 27 |
| 20 | 74 | 26 |
| 21 | 74 | 26 |
| 22 | 75 | 25 |
| 23 | 75 | 25 |
| 24 | 75 | 25 |
| 25 | 76 | 24 |
| 26 | 77 | 23 |
| 27 | 77 | 23 |
| 28 | 77 | 23 |
| 29 | 77 | 23 |
| 30 | 77 | 23 |
| 31 | 78 | 22 |
Chance of precipitation in December
Ōmiya gets around 64 mm of rain and snow over 7.6 wet days in December. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 23% and peaks near 29% on the wettest days, and about 0 day brings snow. The odds ease 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 (%) | 29 | 28 | 28 | 28 | 28 | 27 | 27 | 27 | 26 | 26 | 25 | 25 | 24 | 24 | 23 | 23 | 23 | 22 | 22 | 22 | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 19 | 19 | 19 |
| Snow chance (%) | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 29 | 0 |
| 2 | 28 | 0 |
| 3 | 28 | 1 |
| 4 | 28 | 1 |
| 5 | 28 | 1 |
| 6 | 27 | 1 |
| 7 | 27 | 1 |
| 8 | 27 | 1 |
| 9 | 26 | 1 |
| 10 | 26 | 1 |
| 11 | 25 | 1 |
| 12 | 25 | 1 |
| 13 | 24 | 1 |
| 14 | 24 | 1 |
| 15 | 23 | 1 |
| 16 | 23 | 1 |
| 17 | 23 | 1 |
| 18 | 22 | 1 |
| 19 | 22 | 1 |
| 20 | 22 | 1 |
| 21 | 21 | 1 |
| 22 | 21 | 1 |
| 23 | 21 | 1 |
| 24 | 21 | 1 |
| 25 | 20 | 1 |
| 26 | 20 | 1 |
| 27 | 20 | 1 |
| 28 | 20 | 1 |
| 29 | 19 | 1 |
| 30 | 19 | 2 |
| 31 | 19 | 2 |
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 (%) | 99 | 99 | 99 | 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 |
| Comfortable (%) | 1 | 1 | 1 | 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 |
| Dry (%) | Comfortable (%) | |
|---|---|---|
| 1 | 99 | 1 |
| 2 | 99 | 1 |
| 3 | 99 | 1 |
| 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 | 100 | 0 |
| 30 | 100 | 0 |
| 31 | 100 | 0 |
Wind in December
Winds average 11 km/h in December.
Across December, 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 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 | 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 |
| 31 | 11 | calm |
Sunrise & sunset in December
Daylight runs from about 9 h 42 min at the start of December to 9 h 30 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 6:38 AM to 6:55 AM, and sunset from 4:19 PM to 4:28 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) | 9.7 | 9.7 | 9.7 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.6 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 | 9.5 |
| Sunrise (AM) | 6:38 | 6:38 | 6:39 | 6:40 | 6:41 | 6:42 | 6:43 | 6:43 | 6:44 | 6:45 | 6:46 | 6:46 | 6:47 | 6:48 | 6:48 | 6:49 | 6:50 | 6:50 | 6:51 | 6:51 | 6:52 | 6:52 | 6:53 | 6:53 | 6:54 | 6:54 | 6:54 | 6:55 | 6:55 | 6:55 | 6:55 |
| Sunset (PM) | 4:19 | 4:19 | 4:18 | 4:18 | 4:18 | 4:18 | 4:18 | 4:18 | 4:19 | 4:19 | 4:19 | 4:19 | 4:19 | 4:19 | 4:20 | 4:20 | 4:20 | 4:21 | 4:21 | 4:21 | 4:22 | 4:22 | 4:23 | 4:23 | 4:24 | 4:24 | 4:25 | 4:26 | 4:26 | 4:27 | 4:28 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 9.7 | 6:38 | 4:19 |
| 2 | 9.7 | 6:38 | 4:19 |
| 3 | 9.7 | 6:39 | 4:18 |
| 4 | 9.6 | 6:40 | 4:18 |
| 5 | 9.6 | 6:41 | 4:18 |
| 6 | 9.6 | 6:42 | 4:18 |
| 7 | 9.6 | 6:43 | 4:18 |
| 8 | 9.6 | 6:43 | 4:18 |
| 9 | 9.6 | 6:44 | 4:19 |
| 10 | 9.6 | 6:45 | 4:19 |
| 11 | 9.6 | 6:46 | 4:19 |
| 12 | 9.5 | 6:46 | 4:19 |
| 13 | 9.5 | 6:47 | 4:19 |
| 14 | 9.5 | 6:48 | 4:19 |
| 15 | 9.5 | 6:48 | 4:20 |
| 16 | 9.5 | 6:49 | 4:20 |
| 17 | 9.5 | 6:50 | 4:20 |
| 18 | 9.5 | 6:50 | 4:21 |
| 19 | 9.5 | 6:51 | 4:21 |
| 20 | 9.5 | 6:51 | 4:21 |
| 21 | 9.5 | 6:52 | 4:22 |
| 22 | 9.5 | 6:52 | 4:22 |
| 23 | 9.5 | 6:53 | 4:23 |
| 24 | 9.5 | 6:53 | 4:23 |
| 25 | 9.5 | 6:54 | 4:24 |
| 26 | 9.5 | 6:54 | 4:24 |
| 27 | 9.5 | 6:54 | 4:25 |
| 28 | 9.5 | 6:55 | 4:26 |
| 29 | 9.5 | 6:55 | 4:26 |
| 30 | 9.5 | 6:55 | 4:27 |
| 31 | 9.5 | 6:55 | 4:28 |
Solar energy in December
Average shortwave solar energy reaching the ground each day in December, about 2.36 kWh/m² — the year's lowest.
For context, solar energy here swings from a low near 2.36 kWh/m² to a high of 5.33 kWh/m² in May across the year — December's 2.36 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) | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.3 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.4 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | 2.6 | 2.6 | 2.6 | 2.6 | 2.6 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 2.3 | Moderate |
| 2 | 2.3 | Moderate |
| 3 | 2.3 | Moderate |
| 4 | 2.3 | Moderate |
| 5 | 2.3 | Moderate |
| 6 | 2.3 | Moderate |
| 7 | 2.3 | Moderate |
| 8 | 2.3 | Moderate |
| 9 | 2.3 | Moderate |
| 10 | 2.3 | Moderate |
| 11 | 2.3 | Moderate |
| 12 | 2.3 | Moderate |
| 13 | 2.3 | Moderate |
| 14 | 2.4 | Moderate |
| 15 | 2.4 | Moderate |
| 16 | 2.4 | Moderate |
| 17 | 2.4 | Moderate |
| 18 | 2.4 | Moderate |
| 19 | 2.4 | Moderate |
| 20 | 2.4 | Moderate |
| 21 | 2.5 | Moderate |
| 22 | 2.5 | Moderate |
| 23 | 2.5 | Moderate |
| 24 | 2.5 | Moderate |
| 25 | 2.5 | Moderate |
| 26 | 2.5 | Moderate |
| 27 | 2.6 | Moderate |
| 28 | 2.6 | Moderate |
| 29 | 2.6 | Moderate |
| 30 | 2.6 | Moderate |
| 31 | 2.6 | Moderate |
Hazard calendar for Ōmiya
In December, Ōmiya sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Ōmiya sits in the Pacific typhoon belt; the season peaks July–October.
Is December a good time to visit Ōmiya?
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 Ōmiya.
What to pack for Ōmiya in December
From December's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In December, Ōmiya sees daytime highs around 10°C and nights near 4°C. Pack a warm layer. About 8 days see rain.
Sea temperature near Ōmiya in December
The nearest coast averages about 16°C in December — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 27 km away) is warmest in August at about 24°C and coldest in February near 13°C.
It's comfortable for a long swim from Jun 24 to Oct 28 — about 4.2 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 15 | 13 | 13 | 15 | 17 | 19 | 22 | 24 | 23 | 21 | 19 | 16 |
| Comfort | Bracing | Bracing | Bracing | Bracing | Cool | Cool | Refreshing | Warm | Refreshing | Refreshing | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 15 | Bracing |
| Feb | 13 | Bracing |
| Mar | 13 | Bracing |
| Apr | 15 | Bracing |
| May | 17 | Cool |
| Jun | 19 | Cool |
| Jul | 22 | Refreshing |
| Aug | 24 | Warm |
| Sep | 23 | Refreshing |
| Oct | 21 | Refreshing |
| Nov | 19 | Cool |
| Dec | 16 | Cool |
UV index in Ōmiya in December
Clear-sky midday UV in December peaks around 2. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Ōmiya peaks around July 24 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 | 10 | 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 | 10 | Very high |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 3 | Moderate |
| Dec | 2 | Moderate |
Air quality in Ōmiya 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 Ōmiya is worst in April — around 21 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 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) | 10 | 13 | 19 | 21 | 20 | 16 | 14 | 13 | 11 | 11 | 10 | 9 |
| Level | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 13 | Moderate |
| Mar | 19 | Moderate |
| Apr | 21 | Moderate |
| May | 20 | Moderate |
| Jun | 16 | Moderate |
| Jul | 14 | Moderate |
| Aug | 13 | Moderate |
| Sep | 11 | Good |
| Oct | 11 | Good |
| Nov | 10 | Good |
| Dec | 9 | Good |
Where is Ōmiya?
Ōmiya sits at 36.5°N, 140.4°E, 56 m above sea level, in Japan. The nearest listed city is Hitachiomiya, 2.0 km away.
Topography around Ōmiya
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ōmiya.
Within 3 km, the terrain around Ōmiya has only modest variations in elevation — a maximum elevation change of 123 m around an average of 52 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 511 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,902 m.
The land around Ōmiya is covered by trees (44%), artificial surfaces (23%) and cropland (22%) within 3 km, trees (66%) within 16 km, and trees (48%) and water (23%) 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 Ōmiya (36.55°, 140.4167°, elevation 56 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).