Ijūin weather in May
In May, Ijūin sees average daytime highs of 24°C and overnight lows near 17°C, with 197 mm of rain across 11.6 wet days and about 13.6 hours of daylight. It is the 6th-warmest and 4th-wettest month of the year here.
Highs climb over the month, from about 23°C in the first days to 25°C by the end. The sky is clear or mostly clear about 22% of the time in May, and the air most often feels humid.
Daylight stretches from about 13 h 12 min at the start of May to 13 h 54 min by month's end. Set against the rest of the year, May is Ijūin's 10th-clearest and 8th-windiest month. For the whole year in context, see Ijūin's year-round climate.
- Daytime high
- 24°
- 6th warmest
- Overnight low
- 17°
- 7th coldest
- Rainfall
- 197 mm
- 11.6 wet days
- Daylight
- 13 h 36 min
- 5:26 AM – 7:03 PM
- Cloud cover
- 70%
- 10th clearest
- Wind
- 9 km/h
- 8th windiest
- Solar energy
- 5.06 kWh/m²
- Travel score
- 6.4
- out of 10
Temperature in May
Highs climb over the month, from about 23°C in the first days to 25°C by the end.
A typical May day in Ijūin reaches about 24°C in the afternoon and slips back to 17°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 27°C. Set against its neighbours, May runs about 4°C warmer than April and about 2°C cooler than June.
| 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) | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 24 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
| Avg low (°C) | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 19 | 19 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 23 | 15 |
| 2 | 23 | 15 |
| 3 | 23 | 15 |
| 4 | 23 | 15 |
| 5 | 23 | 16 |
| 6 | 23 | 16 |
| 7 | 23 | 16 |
| 8 | 24 | 16 |
| 9 | 24 | 16 |
| 10 | 24 | 16 |
| 11 | 24 | 16 |
| 12 | 24 | 16 |
| 13 | 24 | 17 |
| 14 | 24 | 17 |
| 15 | 24 | 17 |
| 16 | 24 | 17 |
| 17 | 24 | 17 |
| 18 | 24 | 17 |
| 19 | 25 | 17 |
| 20 | 25 | 17 |
| 21 | 25 | 17 |
| 22 | 25 | 18 |
| 23 | 25 | 18 |
| 24 | 25 | 18 |
| 25 | 25 | 18 |
| 26 | 25 | 18 |
| 27 | 25 | 18 |
| 28 | 25 | 18 |
| 29 | 25 | 18 |
| 30 | 25 | 19 |
| 31 | 25 | 19 |
How May really feels in Ijūin
Once humidity and wind are folded in, May 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.
May sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Ijūin weather by month
How May compares with the rest of the year at a glance. May is the 6th-warmest and 4th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 12° / 6° | 82 | 9 | 10.2 | 3.4 |
| Feb | 13° / 6° | 102 | 9.6 | 10.8 | 3.7 |
| Mar | 16° / 9° | 154 | 12.9 | 11.8 | 4.9 |
| Apr | 21° / 13° | 176 | 11.6 | 12.8 | 6.0 |
| May | 24° / 17° | 197 | 11.6 | 13.6 | 6.4 |
| Jun | 27° / 21° | 488 | 19.8 | 14 | 4.7 |
| Jul | 30° / 25° | 300 | 19.9 | 13.9 | 3.7 |
| Aug | 31° / 25° | 167 | 17.2 | 13.2 | 3.6 |
| Sep | 29° / 23° | 202 | 14.7 | 12.2 | 4.9 |
| Oct | 25° / 18° | 110 | 9 | 11.2 | 7.1 |
| Nov | 20° / 12° | 112 | 8.9 | 10.4 | 6.4 |
| Dec | 14° / 8° | 85 | 7.7 | 10 | 4.6 |
Cloud cover in May
The sky is clear or mostly clear about 22% of the time in May.
Beyond those clear spells, partly cloudy skies cover about 12% of May, with mostly cloudy or overcast conditions the remaining 66%. Skies tend to cloud over 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 (%) | 39 | 38 | 38 | 38 | 37 | 36 | 36 | 36 | 35 | 35 | 35 | 35 | 35 | 34 | 34 | 34 | 34 | 34 | 34 | 33 | 33 | 32 | 32 | 31 | 31 | 31 | 30 | 30 | 28 | 28 | 26 |
| Cloudier (%) | 61 | 62 | 62 | 62 | 63 | 64 | 64 | 64 | 65 | 65 | 65 | 65 | 65 | 66 | 66 | 66 | 66 | 66 | 66 | 67 | 67 | 68 | 68 | 69 | 69 | 69 | 70 | 70 | 72 | 72 | 74 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 39 | 61 |
| 2 | 38 | 62 |
| 3 | 38 | 62 |
| 4 | 38 | 62 |
| 5 | 37 | 63 |
| 6 | 36 | 64 |
| 7 | 36 | 64 |
| 8 | 36 | 64 |
| 9 | 35 | 65 |
| 10 | 35 | 65 |
| 11 | 35 | 65 |
| 12 | 35 | 65 |
| 13 | 35 | 65 |
| 14 | 34 | 66 |
| 15 | 34 | 66 |
| 16 | 34 | 66 |
| 17 | 34 | 66 |
| 18 | 34 | 66 |
| 19 | 34 | 66 |
| 20 | 33 | 67 |
| 21 | 33 | 67 |
| 22 | 32 | 68 |
| 23 | 32 | 68 |
| 24 | 31 | 69 |
| 25 | 31 | 69 |
| 26 | 31 | 69 |
| 27 | 30 | 70 |
| 28 | 30 | 70 |
| 29 | 28 | 72 |
| 30 | 28 | 72 |
| 31 | 26 | 74 |
Chance of precipitation in May
Ijūin gets around 197 mm of rain over 11.6 wet days in May. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 38% and peaks near 43% 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 (%) | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 36 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 37 | 38 | 38 | 38 | 38 | 39 | 39 | 40 | 41 | 42 | 43 |
| Rain chance (%) | |
|---|---|
| 1 | 36 |
| 2 | 36 |
| 3 | 36 |
| 4 | 36 |
| 5 | 36 |
| 6 | 36 |
| 7 | 36 |
| 8 | 36 |
| 9 | 37 |
| 10 | 37 |
| 11 | 37 |
| 12 | 37 |
| 13 | 37 |
| 14 | 37 |
| 15 | 37 |
| 16 | 37 |
| 17 | 37 |
| 18 | 37 |
| 19 | 37 |
| 20 | 37 |
| 21 | 37 |
| 22 | 38 |
| 23 | 38 |
| 24 | 38 |
| 25 | 38 |
| 26 | 39 |
| 27 | 39 |
| 28 | 40 |
| 29 | 41 |
| 30 | 42 |
| 31 | 43 |
Humidity in May
Most of May feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, May lands in the humid band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 21% 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 (%) | 40 | 38 | 36 | 34 | 33 | 31 | 29 | 27 | 26 | 25 | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 5 | 4 |
| Comfortable (%) | 28 | 29 | 29 | 29 | 30 | 30 | 30 | 31 | 31 | 32 | 32 | 33 | 33 | 33 | 33 | 33 | 33 | 32 | 32 | 32 | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 23 | 22 | 20 | 19 |
| Humid (%) | 19 | 20 | 21 | 22 | 22 | 23 | 24 | 25 | 25 | 26 | 27 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 38 | 39 | 40 | 41 | 41 | 41 | 41 | 41 |
| Muggy (%) | 11 | 12 | 12 | 12 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 16 | 16 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 25 | 26 | 28 |
| Oppressive (%) | 1 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 7 | 7 | 8 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 40 | 28 | 19 | 11 | 1 |
| 2 | 38 | 29 | 20 | 12 | 2 |
| 3 | 36 | 29 | 21 | 12 | 2 |
| 4 | 34 | 29 | 22 | 12 | 2 |
| 5 | 33 | 30 | 22 | 13 | 2 |
| 6 | 31 | 30 | 23 | 13 | 3 |
| 7 | 29 | 30 | 24 | 14 | 3 |
| 8 | 27 | 31 | 25 | 14 | 3 |
| 9 | 26 | 31 | 25 | 14 | 4 |
| 10 | 25 | 32 | 26 | 14 | 4 |
| 11 | 23 | 32 | 27 | 14 | 4 |
| 12 | 22 | 33 | 27 | 14 | 4 |
| 13 | 21 | 33 | 28 | 14 | 4 |
| 14 | 20 | 33 | 29 | 14 | 4 |
| 15 | 19 | 33 | 30 | 14 | 4 |
| 16 | 18 | 33 | 31 | 15 | 4 |
| 17 | 17 | 33 | 32 | 15 | 4 |
| 18 | 16 | 32 | 33 | 15 | 4 |
| 19 | 15 | 32 | 34 | 16 | 4 |
| 20 | 14 | 32 | 35 | 16 | 4 |
| 21 | 13 | 31 | 36 | 16 | 4 |
| 22 | 12 | 30 | 37 | 17 | 5 |
| 23 | 11 | 29 | 38 | 18 | 5 |
| 24 | 10 | 28 | 38 | 19 | 5 |
| 25 | 9 | 27 | 39 | 20 | 5 |
| 26 | 8 | 26 | 40 | 21 | 5 |
| 27 | 7 | 25 | 41 | 22 | 6 |
| 28 | 6 | 23 | 41 | 23 | 6 |
| 29 | 5 | 22 | 41 | 25 | 7 |
| 30 | 5 | 20 | 41 | 26 | 7 |
| 31 | 4 | 19 | 41 | 28 | 8 |
Wind in May
Winds average 9 km/h in May.
Across May, daily wind ranges from about 9 km/h on the calmest days to 10 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) | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 |
| 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 | 10 | calm |
| 2 | 10 | calm |
| 3 | 10 | calm |
| 4 | 10 | calm |
| 5 | 10 | calm |
| 6 | 10 | calm |
| 7 | 10 | calm |
| 8 | 10 | calm |
| 9 | 10 | calm |
| 10 | 9 | calm |
| 11 | 9 | calm |
| 12 | 9 | calm |
| 13 | 9 | calm |
| 14 | 9 | calm |
| 15 | 9 | calm |
| 16 | 9 | calm |
| 17 | 9 | calm |
| 18 | 9 | calm |
| 19 | 9 | calm |
| 20 | 9 | calm |
| 21 | 9 | calm |
| 22 | 9 | calm |
| 23 | 9 | calm |
| 24 | 9 | calm |
| 25 | 9 | calm |
| 26 | 9 | calm |
| 27 | 9 | calm |
| 28 | 9 | calm |
| 29 | 9 | calm |
| 30 | 9 | calm |
| 31 | 9 | calm |
Sunrise & sunset in May
Daylight runs from about 13 h 12 min at the start of May to 13 h 54 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 42 minutes over May. Sunrise moves from 5:39 AM to 5:19 AM, and sunset from 6:52 PM to 7:13 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) | 13.2 | 13.2 | 13.3 | 13.3 | 13.3 | 13.4 | 13.4 | 13.4 | 13.4 | 13.5 | 13.5 | 13.5 | 13.5 | 13.6 | 13.6 | 13.6 | 13.6 | 13.7 | 13.7 | 13.7 | 13.7 | 13.7 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.9 | 13.9 | 13.9 |
| Sunrise (AM) | 5:39 | 5:38 | 5:37 | 5:36 | 5:35 | 5:34 | 5:33 | 5:33 | 5:32 | 5:31 | 5:30 | 5:29 | 5:29 | 5:28 | 5:27 | 5:26 | 5:26 | 5:25 | 5:25 | 5:24 | 5:23 | 5:23 | 5:22 | 5:22 | 5:21 | 5:21 | 5:21 | 5:20 | 5:20 | 5:19 | 5:19 |
| Sunset (PM) | 6:52 | 6:53 | 6:54 | 6:54 | 6:55 | 6:56 | 6:56 | 6:57 | 6:58 | 6:59 | 6:59 | 7:00 | 7:01 | 7:01 | 7:02 | 7:03 | 7:04 | 7:04 | 7:05 | 7:06 | 7:06 | 7:07 | 7:08 | 7:08 | 7:09 | 7:09 | 7:10 | 7:11 | 7:11 | 7:12 | 7:13 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.2 | 5:39 | 6:52 |
| 2 | 13.2 | 5:38 | 6:53 |
| 3 | 13.3 | 5:37 | 6:54 |
| 4 | 13.3 | 5:36 | 6:54 |
| 5 | 13.3 | 5:35 | 6:55 |
| 6 | 13.4 | 5:34 | 6:56 |
| 7 | 13.4 | 5:33 | 6:56 |
| 8 | 13.4 | 5:33 | 6:57 |
| 9 | 13.4 | 5:32 | 6:58 |
| 10 | 13.5 | 5:31 | 6:59 |
| 11 | 13.5 | 5:30 | 6:59 |
| 12 | 13.5 | 5:29 | 7:00 |
| 13 | 13.5 | 5:29 | 7:01 |
| 14 | 13.6 | 5:28 | 7:01 |
| 15 | 13.6 | 5:27 | 7:02 |
| 16 | 13.6 | 5:26 | 7:03 |
| 17 | 13.6 | 5:26 | 7:04 |
| 18 | 13.7 | 5:25 | 7:04 |
| 19 | 13.7 | 5:25 | 7:05 |
| 20 | 13.7 | 5:24 | 7:06 |
| 21 | 13.7 | 5:23 | 7:06 |
| 22 | 13.7 | 5:23 | 7:07 |
| 23 | 13.8 | 5:22 | 7:08 |
| 24 | 13.8 | 5:22 | 7:08 |
| 25 | 13.8 | 5:21 | 7:09 |
| 26 | 13.8 | 5:21 | 7:09 |
| 27 | 13.8 | 5:21 | 7:10 |
| 28 | 13.8 | 5:20 | 7:11 |
| 29 | 13.9 | 5:20 | 7:11 |
| 30 | 13.9 | 5:19 | 7:12 |
| 31 | 13.9 | 5:19 | 7:13 |
Solar energy in May
Average shortwave solar energy reaching the ground each day in May, about 5.06 kWh/m² — the sunniest month for solar.
For context, solar energy here swings from a low near 2.47 kWh/m² to a high of 5.06 kWh/m² in May across the year — May's 5.06 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) | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 4.9 | 4.9 | 4.8 |
| 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 | 5.1 | Bright |
| 2 | 5.1 | Bright |
| 3 | 5.1 | Bright |
| 4 | 5.1 | Bright |
| 5 | 5.1 | Bright |
| 6 | 5.1 | Bright |
| 7 | 5.1 | Bright |
| 8 | 5.0 | Bright |
| 9 | 5.0 | Bright |
| 10 | 5.0 | Bright |
| 11 | 5.0 | Bright |
| 12 | 5.0 | Bright |
| 13 | 5.0 | Bright |
| 14 | 5.0 | Bright |
| 15 | 5.0 | Bright |
| 16 | 5.1 | Bright |
| 17 | 5.1 | Bright |
| 18 | 5.1 | Bright |
| 19 | 5.1 | Bright |
| 20 | 5.1 | Bright |
| 21 | 5.1 | Bright |
| 22 | 5.1 | Bright |
| 23 | 5.1 | Bright |
| 24 | 5.0 | Bright |
| 25 | 5.0 | Bright |
| 26 | 5.0 | Bright |
| 27 | 5.0 | Bright |
| 28 | 5.0 | Bright |
| 29 | 4.9 | Bright |
| 30 | 4.9 | Bright |
| 31 | 4.8 | Bright |
Hazard calendar for Ijūin
In May, Ijūin sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Ijūin sits in the Pacific typhoon belt; the season peaks July–October.
Ijūin's rainy season runs June–July, when most of the year's rain falls.
Is May a good time to visit Ijūin?
Our two travel scores rate May for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
May is a reasonable time to visit Ijūin for sightseeing.
What to pack for Ijūin in May
From May's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In May, Ijūin sees daytime highs around 24°C and nights near 17°C. Worth packing: light clothes, rain gear and sun protection. About 12 days see rain.
Sea temperature near Ijūin in May
The nearest coast averages about 21°C in May — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 26 km away) is warmest in August at about 28°C and coldest in February near 17°C.
It's comfortable for a long swim from May 4 to Dec 16 — about 7.5 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 18 | 17 | 18 | 19 | 21 | 23 | 26 | 28 | 27 | 25 | 23 | 20 |
| Comfort | Cool | Cool | Cool | Cool | Refreshing | Refreshing | Warm | Tropical | Warm | Warm | Refreshing | Refreshing |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 18 | Cool |
| Feb | 17 | Cool |
| Mar | 18 | Cool |
| Apr | 19 | Cool |
| May | 21 | Refreshing |
| Jun | 23 | Refreshing |
| Jul | 26 | Warm |
| Aug | 28 | Tropical |
| Sep | 27 | Warm |
| Oct | 25 | Warm |
| Nov | 23 | Refreshing |
| Dec | 20 | Refreshing |
UV index in Ijūin in May
Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Ijūin peaks around July 10 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 3 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 3 | 5 | 7 | 8 | 8 | 11 | 11 | 9 | 10 | 6 | 5 | 3 |
| Level | Moderate | Moderate | High | Very high | Very high | Extreme | Extreme | Very high | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 3 | Moderate |
| Feb | 5 | Moderate |
| Mar | 7 | High |
| Apr | 8 | Very high |
| May | 8 | Very high |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 9 | Very high |
| Sep | 10 | Very high |
| Oct | 6 | High |
| Nov | 5 | Moderate |
| Dec | 3 | Moderate |
Air quality in Ijūin in May
Average fine-particle pollution (PM2.5) through the year — so you can see where May falls, not just the annual average.
Air quality in Ijūin is worst in April — around 23 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 12 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 | 19 | 22 | 23 | 21 | 17 | 12 | 14 | 12 | 12 | 14 | 13 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 15 | Moderate |
| Feb | 19 | Moderate |
| Mar | 22 | Moderate |
| Apr | 23 | Moderate |
| May | 21 | Moderate |
| Jun | 17 | Moderate |
| Jul | 12 | Moderate |
| Aug | 14 | Moderate |
| Sep | 12 | Moderate |
| Oct | 12 | Moderate |
| Nov | 14 | Moderate |
| Dec | 13 | Moderate |
Where is Ijūin?
Ijūin sits at 31.6°N, 130.4°E, 93 m above sea level, in Japan. The nearest listed city is Umeki, 6.0 km away.
Topography around Ijūin
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Ijūin.
Within 3 km, the terrain around Ijūin has significant variations in elevation — a maximum elevation change of 261 m around an average of 127 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 681 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,644 m.
The land around Ijūin is covered by trees (75%) within 3 km, trees (64%) and water (20%) within 16 km, and water (54%) and trees (39%) 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 Ijūin (31.6167°, 130.4°, elevation 93 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).