Climate averages 1991–2020
Narashino weather
in May.
A mild, 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 mild month in Narashino: daytime highs average 21.7°C and nights cool to about 14.3°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 Yachiyo (10 km away). In May its highs average 21.6°C, about as warm as Narashino, with 131 mm of rain.
Among the 303 cities listed in Japan, Narashino ranks joint 166th 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; Narashino is 0.3°C warmer than that mean.
From May to June, average highs rise by 2.8°C to 24.5°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
Narashino climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.4°C0.9°C | 0.9°C | 69 | 6.8 | 10.010 h |
| February | 9.2°C1.3°C | 1.3°C | 66 | 8.0 | 10.911 h |
| March | 12.5°C4.5°C | 4.5°C | 120 | 12.2 | 11.912 h |
| April | 17.3°C9.3°C | 9.3°C | 114 | 11.9 | 13.113 h |
| May, selected | 21.7°C14.3°C | 14.3°C | 131 | 11.6 | 14.014 h |
| June | 24.5°C18.2°C | 18.2°C | 161 | 13.7 | 14.515 h |
| July | 28.2°C22.2°C | 22.2°C | 153 | 13.7 | 14.314 h |
| August | 29.7°C23.6°C | 23.6°C | 112 | 11.8 | 13.514 h |
| September | 26.1°C20.5°C | 20.5°C | 175 | 14.2 | 12.412 h |
| October | 20.8°C14.9°C | 14.9°C | 207 | 12.9 | 11.311 h |
| November | 15.7°C9.2°C | 9.2°C | 98 | 10.1 | 10.310 h |
| December | 10.8°C3.7°C | 3.7°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
- Yachiyo in MayJapan · 10 kmHigh 21.6°C · Low 14.3°C · 131 mm rain
- Kamagaya in MayJapan · 10 kmHigh 21.9°C · Low 13.9°C · 131 mm rain
- Chiba in MayJapan · 11 kmHigh 21.6°C · Low 14.7°C · 149 mm rain
- Urayasu in MayJapan · 13 kmHigh 21.8°C · Low 14.4°C · 131 mm rain
- Matsudo in MayJapan · 17 kmHigh 22.1°C · Low 13.9°C · 131 mm rain
- Sakura in MayJapan · 18 kmHigh 21.8°C · Low 14.4°C · 128 mm rain
- Katsushika in MayJapan · 18 kmHigh 21.8°C · Low 14.3°C · 129 mm rain
- Ichihara in MayJapan · 19 kmHigh 21.5°C · Low 15.2°C · 149 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 Narashino) is explained once on the Narashino year overview and on the Sources, method and limits page.
Matsudo, Kashiwa and Nagareyama lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.