Climate averages 1991–2020
Niiza weather
in October.
A mild, very wet month: the 6th warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
October is a mild month in Niiza: daytime highs average 20.5°C and nights cool to about 13.5°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 215 mm of rain on roughly 14 days, which makes October a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 11 h 19 min on an average October day.
The nearest other city in this atlas is Tokorozawa (8 km away). In October its highs average 19.8°C, 0.7°C cooler than Niiza, with 215 mm of rain.
Among the 303 cities listed in Japan, Niiza ranks joint 176th of 303 for the warmest October highs and joint 253rd of 303 for the driest October (rainfall, lowest first). The mean October high of those 303 cities is 20.4°C; Niiza is 0.1°C warmer than that mean.
From October to November, average highs fall by 5.2°C to 15.3°C, and monthly rainfall falls from 215 mm to 92 mm.
The annual picture
October 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
Niiza climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 7.9°C-1.6°C | -1.6°C | 69 | 7.5 | 10.010 h |
| February | 8.9°C-0.9°C | -0.9°C | 66 | 8.5 | 10.911 h |
| March | 12.4°C2.7°C | 2.7°C | 120 | 13.2 | 11.912 h |
| April | 17.5°C7.9°C | 7.9°C | 123 | 12.8 | 13.113 h |
| May | 22.0°C13.4°C | 13.4°C | 139 | 13.1 | 14.014 h |
| June | 24.8°C17.7°C | 17.7°C | 177 | 15.4 | 14.515 h |
| July | 28.5°C21.8°C | 21.8°C | 182 | 16.4 | 14.314 h |
| August | 29.9°C23.2°C | 23.2°C | 142 | 15.4 | 13.514 h |
| September | 26.0°C19.6°C | 19.6°C | 204 | 14.9 | 12.412 h |
| October, selected | 20.5°C13.5°C | 13.5°C | 215 | 13.7 | 11.311 h |
| November | 15.3°C7.2°C | 7.2°C | 92 | 10.2 | 10.310 h |
| December | 10.3°C1.4°C | 1.4°C | 61 | 7.4 | 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
October in nearby cities
- Tokorozawa in OctoberJapan · 8 kmHigh 19.8°C · Low 12.8°C · 215 mm rain
- Yono in OctoberJapan · 10 kmHigh 20.5°C · Low 13.2°C · 190 mm rain
- Kawagoe in OctoberJapan · 12 kmHigh 20.1°C · Low 12.9°C · 196 mm rain
- Musashino in OctoberJapan · 13 kmHigh 20.2°C · Low 13.7°C · 215 mm rain
- Saitama in OctoberJapan · 13 kmHigh 20.7°C · Low 13.5°C · 190 mm rain
- Sayama in OctoberJapan · 14 kmHigh 19.9°C · Low 12.7°C · 215 mm rain
- Kawaguchi in OctoberJapan · 14 kmHigh 20.8°C · Low 13.8°C · 209 mm rain
- Iruma in OctoberJapan · 17 kmHigh 19.6°C · Low 12.6°C · 242 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 Niiza) is explained once on the Niiza year overview and on the Sources, method and limits page.
Tokorozawa, Fuchū and Hino lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.