Climate averages 1991–2020
Isehara weather
in April.
A mild, wet month: the 7th warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a mild month in Isehara: daytime highs average 16.6°C and nights cool to about 9.5°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 147 mm of rain on roughly 14 days, which makes April a wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 04 min on an average April day.
The nearest other city in this atlas is Atsugi (7 km away). In April its highs average 16.2°C, about as warm as Isehara, with 147 mm of rain.
Among the 303 cities listed in Japan, Isehara ranks joint 210th of 303 for the warmest April highs and joint 238th of 303 for the driest April (rainfall, lowest first). The mean April high of those 303 cities is 16.7°C; Isehara is 0.1°C cooler than that mean.
From April to May, average highs rise by 3.9°C to 20.5°C, and monthly rainfall rises from 147 mm to 158 mm.
The annual picture
April 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, selected | 16.6°C9.5°C | 9.5°C | 147 | 14.4 | 13.113 h |
| May | 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
April in nearby cities
- Atsugi in AprilJapan · 7 kmHigh 16.2°C · Low 9.5°C · 147 mm rain
- Hiratsuka in AprilJapan · 8 kmHigh 16.2°C · Low 9.8°C · 176 mm rain
- Hadano in AprilJapan · 8 kmHigh 16.8°C · Low 9.2°C · 176 mm rain
- Chigasaki in AprilJapan · 11 kmHigh 16.1°C · Low 10.3°C · 151 mm rain
- Minamirinkan in AprilJapan · 16 kmHigh 16.3°C · Low 8.3°C · 125 mm rain
- Fujisawa in AprilJapan · 16 kmHigh 16.0°C · Low 10.4°C · 151 mm rain
- Sagamihara in AprilJapan · 20 kmHigh 16.8°C · Low 7.3°C · 147 mm rain
- Machida in AprilJapan · 20 kmHigh 15.9°C · Low 8.5°C · 125 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.