Ōarai weather in March
In March, Ōarai sees average daytime highs of 12°C and overnight lows near 6°C, with 126 mm of precipitation across 13 wet days and about 11.7 hours of daylight. It is the 9th-warmest and 6th-wettest month of the year here.
Highs climb over the month, from about 10°C in the first days to 13°C by the end. The sky is clear or mostly clear about 33% of the time in March, and the air most often feels dry.
Daylight stretches from about 11 h 06 min at the start of March to 12 h 18 min by month's end. Set against the rest of the year, March is Ōarai's 5th-clearest and 1st-windiest month. For the whole year in context, see Ōarai's year-round climate.
- Daytime high
- 12°
- 9th warmest
- Overnight low
- 6°
- 4th coldest
- Precipitation
- 126 mm
- 13 wet days
- Daylight
- 11 h 42 min
- 5:56 AM – 5:39 PM
- Cloud cover
- 59%
- 5th clearest
- Wind
- 15 km/h
- 1st windiest
- Solar energy
- 4.21 kWh/m²
- Travel score
- 2.9
- out of 10
Ōarai is town in Higashiibaraki District, Ibaraki Prefecture, Japan.
- Density
- 661/km²
- people per km²
- Founded
- 1954
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in March
Highs climb over the month, from about 10°C in the first days to 13°C by the end.
A typical March day in Ōarai reaches about 12°C in the afternoon and slips back to 6°C overnight — a 6°C spread between the day's warmth and the night's chill. On most days the high lands between 8°C and 16°C. Set against its neighbours, March runs about 3°C warmer than February and about 4°C cooler than April.
| 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) | 10 | 10 | 10 | 10 | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 14 |
| Avg low (°C) | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 8 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 10 | 4 |
| 2 | 10 | 4 |
| 3 | 10 | 5 |
| 4 | 10 | 5 |
| 5 | 10 | 5 |
| 6 | 11 | 5 |
| 7 | 11 | 5 |
| 8 | 11 | 5 |
| 9 | 11 | 5 |
| 10 | 11 | 5 |
| 11 | 11 | 5 |
| 12 | 11 | 5 |
| 13 | 11 | 5 |
| 14 | 11 | 6 |
| 15 | 12 | 6 |
| 16 | 12 | 6 |
| 17 | 12 | 6 |
| 18 | 12 | 6 |
| 19 | 12 | 6 |
| 20 | 12 | 6 |
| 21 | 12 | 6 |
| 22 | 12 | 6 |
| 23 | 12 | 7 |
| 24 | 13 | 7 |
| 25 | 13 | 7 |
| 26 | 13 | 7 |
| 27 | 13 | 7 |
| 28 | 13 | 7 |
| 29 | 13 | 7 |
| 30 | 13 | 7 |
| 31 | 14 | 8 |
How March really feels in Ōarai
Once humidity and wind are folded in, March 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.
March sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Ōarai weather by month
How March compares with the rest of the year at a glance. March is the 9th-warmest and 6th-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° / 3° | 73 | 7.6 | 1.3 | 9.8 | 1.7 |
| Feb | 9° / 3° | 71 | 8.1 | 1.6 | 10.6 | 1.8 |
| Mar | 12° / 6° | 126 | 13 | 0.9 | 11.7 | 2.9 |
| Apr | 16° / 10° | 124 | 12.4 | 0.1 | 12.9 | 4.7 |
| May | 20° / 15° | 148 | 12.6 | 0 | 13.9 | 5.8 |
| Jun | 23° / 18° | 159 | 14.1 | 0 | 14.4 | 5.7 |
| Jul | 26° / 22° | 162 | 14.9 | 0 | 14.2 | 5.7 |
| Aug | 28° / 23° | 111 | 12.1 | 0 | 13.4 | 6.0 |
| Sep | 25° / 21° | 176 | 14.1 | 0 | 12.2 | 6.0 |
| Oct | 20° / 16° | 213 | 13.5 | 0 | 11.1 | 5.8 |
| Nov | 16° / 11° | 106 | 10.5 | 0 | 10.1 | 4.8 |
| Dec | 11° / 6° | 71 | 8.6 | 0.2 | 9.6 | 2.9 |
Cloud cover in March
The sky is clear or mostly clear about 33% of the time in March.
Beyond those clear spells, partly cloudy skies cover about 18% of March, with mostly cloudy or overcast conditions the remaining 48%.
| 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 (%) | 52 | 52 | 52 | 52 | 52 | 52 | 52 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 53 | 52 | 52 | 52 | 51 | 51 | 52 | 51 | 51 | 51 | 50 | 50 | 50 | 50 | 49 | 49 | 49 |
| Cloudier (%) | 48 | 48 | 48 | 48 | 48 | 48 | 48 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | 47 | 48 | 48 | 48 | 49 | 49 | 48 | 49 | 49 | 49 | 50 | 50 | 50 | 50 | 51 | 51 | 51 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 52 | 48 |
| 2 | 52 | 48 |
| 3 | 52 | 48 |
| 4 | 52 | 48 |
| 5 | 52 | 48 |
| 6 | 52 | 48 |
| 7 | 52 | 48 |
| 8 | 53 | 47 |
| 9 | 53 | 47 |
| 10 | 53 | 47 |
| 11 | 53 | 47 |
| 12 | 53 | 47 |
| 13 | 53 | 47 |
| 14 | 53 | 47 |
| 15 | 53 | 47 |
| 16 | 52 | 48 |
| 17 | 52 | 48 |
| 18 | 52 | 48 |
| 19 | 51 | 49 |
| 20 | 51 | 49 |
| 21 | 52 | 48 |
| 22 | 51 | 49 |
| 23 | 51 | 49 |
| 24 | 51 | 49 |
| 25 | 50 | 50 |
| 26 | 50 | 50 |
| 27 | 50 | 50 |
| 28 | 50 | 50 |
| 29 | 49 | 51 |
| 30 | 49 | 51 |
| 31 | 49 | 51 |
Chance of precipitation in March
Ōarai gets around 126 mm of rain and snow over 13 wet days in March. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable precipitation averages around 40% and peaks near 43% on the wettest days, and about 1 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 38 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 39 | 40 | 40 | 40 | 41 | 41 | 42 | 42 | 42 | 42 | 42 | 43 | 43 | 42 | 42 | 42 |
| Snow chance (%) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Rain chance (%) | Snow chance (%) | |
|---|---|---|
| 1 | 38 | 4 |
| 2 | 39 | 4 |
| 3 | 39 | 4 |
| 4 | 39 | 4 |
| 5 | 39 | 4 |
| 6 | 39 | 4 |
| 7 | 39 | 4 |
| 8 | 39 | 4 |
| 9 | 39 | 4 |
| 10 | 39 | 4 |
| 11 | 39 | 3 |
| 12 | 39 | 3 |
| 13 | 39 | 3 |
| 14 | 39 | 2 |
| 15 | 39 | 2 |
| 16 | 39 | 2 |
| 17 | 40 | 2 |
| 18 | 40 | 2 |
| 19 | 40 | 2 |
| 20 | 41 | 2 |
| 21 | 41 | 2 |
| 22 | 42 | 1 |
| 23 | 42 | 1 |
| 24 | 42 | 1 |
| 25 | 42 | 1 |
| 26 | 42 | 1 |
| 27 | 43 | 1 |
| 28 | 43 | 1 |
| 29 | 42 | 1 |
| 30 | 42 | 1 |
| 31 | 42 | 1 |
Humidity in March
Most of March feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, March 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 | 99 | 99 |
| Comfortable (%) | 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 | 0 | 1 | 1 |
| Dry (%) | Comfortable (%) | |
|---|---|---|
| 1 | 100 | 0 |
| 2 | 100 | 0 |
| 3 | 100 | 0 |
| 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 | 99 | 1 |
| 31 | 99 | 1 |
Wind in March
Winds average 15 km/h in March, the windiest month of the year.
Across March, daily wind ranges from about 15 km/h on the calmest days to 15 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) | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 15 | light breeze |
| 2 | 15 | light breeze |
| 3 | 15 | light breeze |
| 4 | 15 | light breeze |
| 5 | 15 | light breeze |
| 6 | 15 | light breeze |
| 7 | 15 | light breeze |
| 8 | 15 | light breeze |
| 9 | 15 | light breeze |
| 10 | 15 | light breeze |
| 11 | 15 | light breeze |
| 12 | 15 | light breeze |
| 13 | 15 | light breeze |
| 14 | 15 | light breeze |
| 15 | 15 | light breeze |
| 16 | 15 | light breeze |
| 17 | 15 | light breeze |
| 18 | 15 | light breeze |
| 19 | 15 | light breeze |
| 20 | 15 | light breeze |
| 21 | 15 | light breeze |
| 22 | 15 | light breeze |
| 23 | 15 | light breeze |
| 24 | 15 | light breeze |
| 25 | 15 | light breeze |
| 26 | 15 | light breeze |
| 27 | 15 | light breeze |
| 28 | 15 | light breeze |
| 29 | 15 | light breeze |
| 30 | 15 | light breeze |
| 31 | 15 | light breeze |
Sunrise & sunset in March
Daylight runs from about 11 h 06 min at the start of March to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 72 minutes over March. Sunrise moves from 6:17 AM to 5:33 AM, and sunset from 5:25 PM to 5:52 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) | 11.1 | 11.2 | 11.2 | 11.2 | 11.3 | 11.3 | 11.4 | 11.4 | 11.4 | 11.5 | 11.5 | 11.6 | 11.6 | 11.6 | 11.7 | 11.7 | 11.8 | 11.8 | 11.8 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 | 12.2 | 12.2 | 12.3 | 12.3 |
| Sunrise (AM) | 6:17 | 6:16 | 6:14 | 6:13 | 6:12 | 6:10 | 6:09 | 6:07 | 6:06 | 6:05 | 6:03 | 6:02 | 6:00 | 5:59 | 5:57 | 5:56 | 5:54 | 5:53 | 5:51 | 5:50 | 5:48 | 5:47 | 5:45 | 5:44 | 5:42 | 5:41 | 5:39 | 5:38 | 5:36 | 5:35 | 5:33 |
| Sunset (PM) | 5:25 | 5:26 | 5:27 | 5:28 | 5:29 | 5:30 | 5:31 | 5:31 | 5:32 | 5:33 | 5:34 | 5:35 | 5:36 | 5:37 | 5:38 | 5:39 | 5:40 | 5:41 | 5:41 | 5:42 | 5:43 | 5:44 | 5:45 | 5:46 | 5:47 | 5:48 | 5:48 | 5:49 | 5:50 | 5:51 | 5:52 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.1 | 6:17 | 5:25 |
| 2 | 11.2 | 6:16 | 5:26 |
| 3 | 11.2 | 6:14 | 5:27 |
| 4 | 11.2 | 6:13 | 5:28 |
| 5 | 11.3 | 6:12 | 5:29 |
| 6 | 11.3 | 6:10 | 5:30 |
| 7 | 11.4 | 6:09 | 5:31 |
| 8 | 11.4 | 6:07 | 5:31 |
| 9 | 11.4 | 6:06 | 5:32 |
| 10 | 11.5 | 6:05 | 5:33 |
| 11 | 11.5 | 6:03 | 5:34 |
| 12 | 11.6 | 6:02 | 5:35 |
| 13 | 11.6 | 6:00 | 5:36 |
| 14 | 11.6 | 5:59 | 5:37 |
| 15 | 11.7 | 5:57 | 5:38 |
| 16 | 11.7 | 5:56 | 5:39 |
| 17 | 11.8 | 5:54 | 5:40 |
| 18 | 11.8 | 5:53 | 5:41 |
| 19 | 11.8 | 5:51 | 5:41 |
| 20 | 11.9 | 5:50 | 5:42 |
| 21 | 11.9 | 5:48 | 5:43 |
| 22 | 12.0 | 5:47 | 5:44 |
| 23 | 12.0 | 5:45 | 5:45 |
| 24 | 12.0 | 5:44 | 5:46 |
| 25 | 12.1 | 5:42 | 5:47 |
| 26 | 12.1 | 5:41 | 5:48 |
| 27 | 12.1 | 5:39 | 5:48 |
| 28 | 12.2 | 5:38 | 5:49 |
| 29 | 12.2 | 5:36 | 5:50 |
| 30 | 12.3 | 5:35 | 5:51 |
| 31 | 12.3 | 5:33 | 5:52 |
Solar energy in March
Average shortwave solar energy reaching the ground each day in March, about 4.21 kWh/m².
For context, solar energy here swings from a low near 2.35 kWh/m² to a high of 5.38 kWh/m² in May across the year — March's 4.21 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) | 3.8 | 3.8 | 3.8 | 3.9 | 3.9 | 3.9 | 3.9 | 4.0 | 4.0 | 4.0 | 4.1 | 4.1 | 4.2 | 4.2 | 4.2 | 4.3 | 4.3 | 4.3 | 4.3 | 4.4 | 4.4 | 4.4 | 4.5 | 4.5 | 4.5 | 4.5 | 4.6 | 4.6 | 4.6 | 4.7 | 4.7 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | 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 | 3.8 | Moderate |
| 2 | 3.8 | Moderate |
| 3 | 3.8 | Moderate |
| 4 | 3.9 | Moderate |
| 5 | 3.9 | Moderate |
| 6 | 3.9 | Moderate |
| 7 | 3.9 | Moderate |
| 8 | 4.0 | Moderate |
| 9 | 4.0 | Bright |
| 10 | 4.0 | Bright |
| 11 | 4.1 | Bright |
| 12 | 4.1 | Bright |
| 13 | 4.2 | Bright |
| 14 | 4.2 | Bright |
| 15 | 4.2 | Bright |
| 16 | 4.3 | Bright |
| 17 | 4.3 | Bright |
| 18 | 4.3 | Bright |
| 19 | 4.3 | Bright |
| 20 | 4.4 | Bright |
| 21 | 4.4 | Bright |
| 22 | 4.4 | Bright |
| 23 | 4.5 | Bright |
| 24 | 4.5 | Bright |
| 25 | 4.5 | Bright |
| 26 | 4.5 | Bright |
| 27 | 4.6 | Bright |
| 28 | 4.6 | Bright |
| 29 | 4.6 | Bright |
| 30 | 4.7 | Bright |
| 31 | 4.7 | Bright |
Hazard calendar for Ōarai
In March, Ōarai sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Ōarai sits in the Pacific typhoon belt; the season peaks July–October.
Is March a good time to visit Ōarai?
Our two travel scores rate March for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
March is a weaker month for outdoor sightseeing in Ōarai.
What to pack for Ōarai in March
From March's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In March, Ōarai sees daytime highs around 12°C and nights near 6°C. Pack a warm layer. Worth having: rain gear. About 13 days see rain.
Sea temperature near Ōarai in March
The nearest coast averages about 13°C in March — 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 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 Ōarai in March
Clear-sky midday UV in March peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Ōarai 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 Ōarai in March
Average fine-particle pollution (PM2.5) through the year — so you can see where March falls, not just the annual average.
Air quality in Ōarai is worst in March — around 25 µg/m³ PM2.5 (moderate), about 1.8× 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 | 18 | 25 | 25 | 24 | 19 | 16 | 15 | 15 | 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 | 18 | Moderate |
| Mar | 25 | Moderate |
| Apr | 25 | Moderate |
| May | 24 | Moderate |
| Jun | 19 | Moderate |
| Jul | 16 | Moderate |
| Aug | 15 | Moderate |
| Sep | 15 | Moderate |
| Oct | 16 | Moderate |
| Nov | 16 | Moderate |
| Dec | 14 | Moderate |
Where is Ōarai?
Ōarai sits at 36.3°N, 140.6°E, 22 m above sea level, in Japan. The nearest listed city is Katsuta, 9.0 km away.
Topography around Ōarai
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ōarai.
Within 3 km, the terrain around Ōarai has only modest variations in elevation — a maximum elevation change of 45 m around an average of 6 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 64 m; within 80 km, large variations in elevation — a maximum elevation change of 1,005 m.
The land around Ōarai is covered by water (56%) within 3 km, water (50%) within 16 km, and trees (36%), water (29%) and cropland (20%) 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 Ōarai (36.3141°, 140.5839°, elevation 22 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).