Climate averages 1991–2020
Ichihara 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 Ichihara: daytime highs average 21.0°C and nights cool to about 16.2°C. By daytime temperature it is the 6th warmest of the 12 months.
Expect about 251 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 Chiba (10 km away). In October its highs average 21.0°C, about as warm as Ichihara, with 251 mm of rain.
Among the 303 cities listed in Japan, Ichihara ranks joint 120th of 303 for the warmest October highs and joint 291st of 303 for the driest October (rainfall, lowest first). The mean October high of those 303 cities is 20.4°C; Ichihara is 0.7°C warmer than that mean.
From October to November, average highs fall by 4.9°C to 16.1°C, and monthly rainfall falls from 251 mm to 126 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
Ichihara climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 8.8°C3.0°C | 3.0°C | 86 | 7.8 | 10.010 h |
| February | 9.5°C3.1°C | 3.1°C | 83 | 8.8 | 10.911 h |
| March | 12.6°C5.9°C | 5.9°C | 149 | 13.0 | 11.912 h |
| April | 17.2°C10.5°C | 10.5°C | 138 | 12.9 | 13.113 h |
| May | 21.5°C15.2°C | 15.2°C | 149 | 12.1 | 14.014 h |
| June | 24.4°C18.8°C | 18.8°C | 189 | 14.3 | 14.515 h |
| July | 28.1°C22.6°C | 22.6°C | 155 | 12.9 | 14.314 h |
| August | 29.5°C24.1°C | 24.1°C | 118 | 11.5 | 13.513 h |
| September | 26.1°C21.3°C | 21.3°C | 207 | 14.7 | 12.412 h |
| October, selected | 21.0°C16.2°C | 16.2°C | 251 | 14.4 | 11.311 h |
| November | 16.1°C10.9°C | 10.9°C | 126 | 11.8 | 10.310 h |
| December | 11.3°C5.8°C | 5.8°C | 80 | 8.7 | 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
October in nearby cities
- Chiba in OctoberJapan · 10 kmHigh 21.0°C · Low 15.5°C · 251 mm rain
- Narashino in OctoberJapan · 19 kmHigh 20.8°C · Low 14.9°C · 207 mm rain
- Kisarazu in OctoberJapan · 20 kmHigh 21.1°C · Low 16.2°C · 251 mm rain
- Mobara in OctoberJapan · 22 kmHigh 21.1°C · Low 16.5°C · 219 mm rain
- Urayasu in OctoberJapan · 23 kmHigh 20.9°C · Low 14.8°C · 207 mm rain
- Yachiyo in OctoberJapan · 25 kmHigh 20.7°C · Low 15.0°C · 207 mm rain
- Sakura in OctoberJapan · 26 kmHigh 20.9°C · Low 15.2°C · 207 mm rain
- Kamagaya in OctoberJapan · 29 kmHigh 20.8°C · Low 14.3°C · 207 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 Ichihara) is explained once on the Ichihara year overview and on the Sources, method and limits page.
Chiba and Kisarazu lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.