Climate averages 1991–2020
Nagareyama 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 Nagareyama: daytime highs average 22.3°C and nights cool to about 13.5°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 131 mm of rain on roughly 12 days, which makes May a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 02 min on an average May day.
The nearest other city in this atlas is Kashiwa (7 km away). In May its highs average 22.1°C, about as warm as Nagareyama, with 131 mm of rain.
Among the 303 cities listed in Japan, Nagareyama ranks joint 92nd of 303 for the warmest May highs and joint 90th of 303 for the driest May (rainfall, lowest first). The mean May high of those 303 cities is 21.3°C; Nagareyama is 0.9°C warmer than that mean.
From May to June, average highs rise by 2.7°C to 25.0°C, and monthly rainfall rises from 131 mm to 161 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
Nagareyama climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.2°C-1.1°C | -1.1°C | 69 | 6.8 | 10.010 h |
| February | 9.2°C-0.4°C | -0.4°C | 66 | 8.0 | 10.911 h |
| March | 12.7°C3.1°C | 3.1°C | 120 | 12.2 | 11.912 h |
| April | 17.8°C8.2°C | 8.2°C | 114 | 11.9 | 13.113 h |
| May, selected | 22.3°C13.5°C | 13.5°C | 131 | 11.6 | 14.014 h |
| June | 25.0°C17.7°C | 17.7°C | 161 | 13.7 | 14.515 h |
| July | 28.6°C21.8°C | 21.8°C | 153 | 13.7 | 14.314 h |
| August | 30.0°C23.2°C | 23.2°C | 112 | 11.8 | 13.514 h |
| September | 26.3°C19.8°C | 19.8°C | 175 | 14.2 | 12.412 h |
| October | 20.8°C13.8°C | 13.8°C | 207 | 12.9 | 11.311 h |
| November | 15.6°C7.5°C | 7.5°C | 98 | 10.1 | 10.310 h |
| December | 10.6°C1.7°C | 1.7°C | 63 | 7.7 | 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
May in nearby cities
- Kashiwa in MayJapan · 7 kmHigh 22.1°C · Low 13.6°C · 131 mm rain
- Matsudo in MayJapan · 8 kmHigh 22.1°C · Low 13.9°C · 131 mm rain
- Sōka in MayJapan · 10 kmHigh 22.2°C · Low 13.8°C · 129 mm rain
- Koshigaya in MayJapan · 11 kmHigh 22.4°C · Low 13.5°C · 128 mm rain
- Kamagaya in MayJapan · 13 kmHigh 21.9°C · Low 13.9°C · 131 mm rain
- Katsushika in MayJapan · 14 kmHigh 21.8°C · Low 14.3°C · 129 mm rain
- Toride in MayJapan · 17 kmHigh 22.3°C · Low 13.8°C · 131 mm rain
- Kawaguchi in MayJapan · 18 kmHigh 22.3°C · Low 13.7°C · 129 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 Nagareyama) is explained once on the Nagareyama year overview and on the Sources, method and limits page.
Matsudo, Kashiwa and Yachiyo lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.