Climate averages 1991–2020
Isesaki 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 Isesaki: daytime highs average 21.2°C and nights cool to about 11.5°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 132 mm of rain on roughly 13 days, which makes May a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 05 min on an average May day.
The nearest other city in this atlas is Honjō (9 km away). In May its highs average 21.5°C, about as warm as Isesaki, with 132 mm of rain.
Among the 303 cities listed in Japan, Isesaki ranks joint 194th of 303 for the warmest May highs and joint 101st of 303 for the driest May (rainfall, lowest first). The mean May high of those 303 cities is 21.3°C; Isesaki is 0.1°C cooler than that mean.
From May to June, average highs rise by 2.5°C to 23.7°C, and monthly rainfall rises from 132 mm to 173 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
Isesaki climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 6.5°C-2.3°C | -2.3°C | 54 | 6.5 | 10.010 h |
| February | 7.5°C-1.9°C | -1.9°C | 54 | 7.3 | 10.811 h |
| March | 11.2°C1.0°C | 1.0°C | 99 | 11.9 | 11.912 h |
| April | 16.6°C6.1°C | 6.1°C | 111 | 11.7 | 13.113 h |
| May, selected | 21.2°C11.5°C | 11.5°C | 132 | 12.9 | 14.114 h |
| June | 23.7°C16.2°C | 16.2°C | 173 | 16.4 | 14.615 h |
| July | 27.2°C20.2°C | 20.2°C | 199 | 17.8 | 14.414 h |
| August | 28.3°C21.4°C | 21.4°C | 152 | 16.0 | 13.514 h |
| September | 24.4°C17.9°C | 17.9°C | 199 | 16.1 | 12.412 h |
| October | 19.1°C11.8°C | 11.8°C | 187 | 12.8 | 11.311 h |
| November | 14.0°C5.3°C | 5.3°C | 69 | 7.8 | 10.310 h |
| December | 9.1°C0.4°C | 0.4°C | 47 | 6.6 | 9.710 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
- Honjō in MayJapan · 9 kmHigh 21.5°C · Low 12.0°C · 132 mm rain
- Maebashi in MayJapan · 14 kmHigh 21.3°C · Low 11.5°C · 141 mm rain
- Ōta, Japan in MayJapan · 15 kmHigh 22.0°C · Low 12.1°C · 132 mm rain
- Kiryū in MayJapan · 15 kmHigh 21.9°C · Low 11.9°C · 136 mm rain
- Takasaki in MayJapan · 17 kmHigh 21.0°C · Low 11.1°C · 178 mm rain
- Shibukawa in MayJapan · 26 kmHigh 21.0°C · Low 11.5°C · 141 mm rain
- Kumagaya in MayJapan · 26 kmHigh 22.3°C · Low 12.9°C · 152 mm rain
- Tatebayashi in MayJapan · 31 kmHigh 22.2°C · Low 12.3°C · 152 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 Isesaki) is explained once on the Isesaki year overview and on the Sources, method and limits page.
Ōta, Japan and Honjō lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.