Climate averages 1991–2020
Kumagaya weather
in April.
A mild, wet month: the 7th warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
April is a mild month in Kumagaya: daytime highs average 17.7°C and nights cool to about 7.4°C. By daytime temperature it is the 7th warmest of the 12 months.
Expect about 121 mm of rain on roughly 12 days, which makes April a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 05 min on an average April day.
The nearest other city in this atlas is Kōnosu (14 km away). In April its highs average 17.7°C, about as warm as Kumagaya, with 106 mm of rain.
Among the 303 cities listed in Japan, Kumagaya ranks joint 105th of 303 for the warmest April highs and joint 136th of 303 for the driest April (rainfall, lowest first). The mean April high of those 303 cities is 16.7°C; Kumagaya is 1.0°C warmer than that mean.
From April to May, average highs rise by 4.6°C to 22.3°C, and monthly rainfall rises from 121 mm to 152 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
Kumagaya climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.7°C-1.6°C | -1.6°C | 55 | 6.1 | 10.010 h |
| February | 8.8°C-0.9°C | -0.9°C | 53 | 7.0 | 10.811 h |
| March | 12.5°C2.3°C | 2.3°C | 104 | 11.8 | 11.912 h |
| April, selected | 17.7°C7.4°C | 7.4°C | 121 | 12.2 | 13.113 h |
| May | 22.3°C12.9°C | 12.9°C | 152 | 13.6 | 14.114 h |
| June | 25.0°C17.5°C | 17.5°C | 187 | 16.7 | 14.615 h |
| July | 28.5°C21.6°C | 21.6°C | 220 | 18.8 | 14.414 h |
| August | 29.8°C22.9°C | 22.9°C | 171 | 16.4 | 13.514 h |
| September | 25.9°C19.3°C | 19.3°C | 221 | 16.7 | 12.412 h |
| October | 20.3°C13.2°C | 13.2°C | 206 | 13.7 | 11.311 h |
| November | 15.1°C6.7°C | 6.7°C | 83 | 8.6 | 10.310 h |
| December | 10.2°C1.2°C | 1.2°C | 51 | 6.7 | 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
- Kōnosu in AprilJapan · 14 kmHigh 17.7°C · Low 7.4°C · 106 mm rain
- Tatebayashi in AprilJapan · 18 kmHigh 17.6°C · Low 6.8°C · 121 mm rain
- Ōta, Japan in AprilJapan · 18 kmHigh 17.3°C · Low 6.6°C · 111 mm rain
- Kazo in AprilJapan · 19 kmHigh 17.9°C · Low 7.4°C · 106 mm rain
- Sakado in AprilJapan · 20 kmHigh 17.6°C · Low 7.3°C · 106 mm rain
- Honjō in AprilJapan · 21 kmHigh 16.9°C · Low 6.6°C · 111 mm rain
- Isesaki in AprilJapan · 26 kmHigh 16.6°C · Low 6.1°C · 111 mm rain
- Kawagoe in AprilJapan · 27 kmHigh 17.4°C · Low 7.2°C · 106 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 Kumagaya) is explained once on the Kumagaya year overview and on the Sources, method and limits page.
Sano and Tatebayashi lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.