Climate averages 1991–2020
Isehara weather
in May.
A mild, wet month: the 5th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Isehara: daytime highs average 20.5°C and nights cool to about 14.3°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 158 mm of rain on roughly 14 days, which makes May a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 00 min on an average May day.
The nearest other city in this atlas is Atsugi (7 km away). In May its highs average 20.1°C, about as warm as Isehara, with 158 mm of rain.
Among the 303 cities listed in Japan, Isehara ranks joint 236th of 303 for the warmest May highs and joint 213th of 303 for the driest May (rainfall, lowest first). The mean May high of those 303 cities is 21.3°C; Isehara is 0.8°C cooler than that mean.
From May to June, average highs rise by 2.7°C to 23.3°C, and monthly rainfall rises from 158 mm to 203 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
Isehara climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.7°C1.7°C | 1.7°C | 82 | 8.4 | 10.110 h |
| February | 9.3°C1.8°C | 1.8°C | 85 | 10.2 | 10.911 h |
| March | 12.3°C4.9°C | 4.9°C | 154 | 15.4 | 11.912 h |
| April | 16.6°C9.5°C | 9.5°C | 147 | 14.4 | 13.113 h |
| May, selected | 20.5°C14.3°C | 14.3°C | 158 | 13.6 | 14.014 h |
| June | 23.3°C18.3°C | 18.3°C | 203 | 16.4 | 14.515 h |
| July | 26.9°C22.3°C | 22.3°C | 205 | 17.4 | 14.314 h |
| August | 28.1°C23.5°C | 23.5°C | 160 | 16.3 | 13.513 h |
| September | 25.1°C20.5°C | 20.5°C | 229 | 16.1 | 12.412 h |
| October | 20.3°C15.2°C | 15.2°C | 231 | 14.5 | 11.311 h |
| November | 15.7°C9.8°C | 9.8°C | 110 | 11.7 | 10.310 h |
| December | 11.1°C4.6°C | 4.6°C | 76 | 8.8 | 9.810 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
- Atsugi in MayJapan · 7 kmHigh 20.1°C · Low 14.3°C · 158 mm rain
- Hiratsuka in MayJapan · 8 kmHigh 19.9°C · Low 14.4°C · 181 mm rain
- Hadano in MayJapan · 8 kmHigh 21.0°C · Low 14.1°C · 181 mm rain
- Chigasaki in MayJapan · 11 kmHigh 19.8°C · Low 14.8°C · 159 mm rain
- Minamirinkan in MayJapan · 16 kmHigh 20.4°C · Low 13.3°C · 137 mm rain
- Fujisawa in MayJapan · 16 kmHigh 19.8°C · Low 15.0°C · 159 mm rain
- Sagamihara in MayJapan · 20 kmHigh 21.1°C · Low 12.6°C · 158 mm rain
- Machida in MayJapan · 20 kmHigh 20.0°C · Low 13.5°C · 137 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 Isehara) is explained once on the Isehara year overview and on the Sources, method and limits page.
Aihara, Sagamihara and Atsugi lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.