Climate averages 1991–2020
Izumisano weather
in May.
A warm, wet month: the 5th warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a warm month in Izumisano: daytime highs average 23.3°C and nights cool to about 13.9°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 134 mm of rain on roughly 10 days, which makes May a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 56 min on an average May day.
The nearest other city in this atlas is Kishiwada (7 km away). In May its highs average 22.5°C, 0.8°C cooler than Izumisano, with 134 mm of rain.
Among the 303 cities listed in Japan, Izumisano ranks joint 18th of 303 for the warmest May highs and joint 113th of 303 for the driest May (rainfall, lowest first). The mean May high of those 303 cities is 21.3°C; Izumisano is 1.9°C warmer than that mean.
From May to June, average highs rise by 3.1°C to 26.3°C, and monthly rainfall rises from 134 mm to 194 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
Izumisano climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.4°C1.1°C | 1.1°C | 61 | 7.8 | 10.110 h |
| February | 9.5°C1.1°C | 1.1°C | 68 | 8.4 | 10.911 h |
| March | 13.3°C3.8°C | 3.8°C | 107 | 11.2 | 11.912 h |
| April | 18.5°C8.7°C | 8.7°C | 113 | 10.4 | 13.013 h |
| May, selected | 23.3°C13.9°C | 13.9°C | 134 | 10.2 | 13.914 h |
| June | 26.3°C18.7°C | 18.7°C | 194 | 13.7 | 14.414 h |
| July | 29.8°C23.2°C | 23.2°C | 177 | 13.1 | 14.214 h |
| August | 31.7°C24.3°C | 24.3°C | 107 | 10.1 | 13.413 h |
| September | 27.8°C20.4°C | 20.4°C | 176 | 12.3 | 12.412 h |
| October | 22.0°C14.1°C | 14.1°C | 159 | 9.8 | 11.311 h |
| November | 16.4°C8.1°C | 8.1°C | 85 | 7.9 | 10.410 h |
| December | 10.9°C3.2°C | 3.2°C | 69 | 8.2 | 9.910 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
- Kishiwada in MayJapan · 7 kmHigh 22.5°C · Low 13.1°C · 134 mm rain
- Sakai in MayJapan · 23 kmHigh 22.8°C · Low 13.8°C · 132 mm rain
- Kawachi-Nagano in MayJapan · 25 kmHigh 22.4°C · Low 12.7°C · 132 mm rain
- Minato in MayJapan · 27 kmHigh 21.4°C · Low 14.5°C · 149 mm rain
- Tondabayashichō in MayJapan · 28 kmHigh 22.7°C · Low 12.8°C · 132 mm rain
- Kobe in MayJapan · 33 kmHigh 22.4°C · Low 15.0°C · 150 mm rain
- Nishinomiya in MayJapan · 33 kmHigh 23.0°C · Low 14.5°C · 150 mm rain
- Yao in MayJapan · 34 kmHigh 22.9°C · Low 13.5°C · 132 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 Izumisano) is explained once on the Izumisano year overview and on the Sources, method and limits page.
Kishiwada lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.