Climate averages 1991–2020
Aira weather
in May.
A warm, very wet month: the joint 5th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Aira: daytime highs average 23.5°C and nights cool to about 15.3°C. By daytime temperature it is the joint 5th warmest of the 12 months.
Expect about 205 mm of rain on roughly 12 days, which makes May a very wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 45 min on an average May day.
The nearest other city in this atlas is Kirishima (17 km away). In May its highs average 24.5°C, 1.0°C warmer than Aira, with 205 mm of rain.
Among the 303 cities listed in Japan, Aira ranks joint 14th of 303 for the warmest May highs and joint 288th of 303 for the driest May (rainfall, lowest first). The mean May high of those 303 cities is 21.3°C; Aira is 2.2°C warmer than that mean.
From May to June, average highs rise by 2.3°C to 25.8°C, and monthly rainfall rises from 205 mm to 514 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Aira climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 10.5°C3.8°C | 3.8°C | 81 | 9.6 | 10.310 h |
| February | 11.8°C4.2°C | 4.2°C | 106 | 9.8 | 11.011 h |
| March | 15.1°C6.8°C | 6.8°C | 153 | 12.9 | 12.012 h |
| April | 19.5°C10.8°C | 10.8°C | 182 | 11.5 | 12.913 h |
| May, selected | 23.5°C15.3°C | 15.3°C | 205 | 11.7 | 13.814 h |
| June | 25.8°C19.6°C | 19.6°C | 514 | 19.4 | 14.214 h |
| July | 29.4°C23.6°C | 23.6°C | 336 | 20.0 | 14.014 h |
| August | 30.3°C24.2°C | 24.2°C | 173 | 17.4 | 13.313 h |
| September | 28.0°C21.5°C | 21.5°C | 197 | 14.5 | 12.412 h |
| October | 23.5°C16.2°C | 16.2°C | 108 | 8.6 | 11.411 h |
| November | 18.1°C10.7°C | 10.7°C | 111 | 8.7 | 10.611 h |
| December | 12.7°C5.8°C | 5.8°C | 87 | 7.9 | 10.110 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Kirishima in MayJapan · 17 kmHigh 24.5°C · Low 15.8°C · 205 mm rain
- Kagoshima in MayJapan · 23 kmHigh 23.5°C · Low 16.6°C · 197 mm rain
- Sendai, Japan in MayJapan · 28 kmHigh 23.0°C · Low 16.9°C · 205 mm rain
- Miyakonojō in MayJapan · 45 kmHigh 23.6°C · Low 15.6°C · 207 mm rain
- Kanoya in MayJapan · 50 kmHigh 23.8°C · Low 16.3°C · 203 mm rain
- Miyazaki in MayJapan · 79 kmHigh 22.8°C · Low 16.8°C · 200 mm rain
- Honmachi in MayJapan · 81 kmHigh 23.8°C · Low 16.1°C · 174 mm rain
- Amakusa in MayJapan · 85 kmHigh 23.3°C · Low 16.1°C · 181 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Aira) is explained once on the Aira year overview and on the Sources, method and limits page.