Click on a day for an hourly weather forecast
The weather in Chiba in September is hot. The average temperatures are between 22°C and 26°C.
You can expect rain for roughly half of the month of September in Chiba. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Chiba in September 2025.
If you’re planning to visit Chiba in the near future, we highly recommend that you review the 14 day weather forecast for Chiba before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 10° / 5° | 5 | 25 | 1 | 90 mm | Ok | Chiba in January |
| February | 10° / 5° | 6 | 21 | 2 | 121 mm | Bad | Chiba in February |
| March | 13° / 8° | 8 | 23 | 0 | 148 mm | Bad | Chiba in March |
| April | 17° / 12° | 7 | 23 | 0 | 146 mm | Ok | Chiba in April |
| May | 21° / 17° | 7 | 24 | 0 | 152 mm | Ok | Chiba in May |
| June | 24° / 20° | 8 | 22 | 0 | 218 mm | Good | Chiba in June |
| July | 27° / 23° | 8 | 23 | 0 | 184 mm | Good | Chiba in July |
| August | 29° / 25° | 6 | 25 | 0 | 154 mm | Good | Chiba in August |
| September | 26° / 22° | 8 | 22 | 0 | 245 mm | Good | Chiba in September |
| October | 22° / 17° | 8 | 23 | 0 | 283 mm | Ok | Chiba in October |
| November | 17° / 13° | 5 | 25 | 0 | 130 mm | Good | Chiba in November |
| December | 12° / 8° | 5 | 26 | 0 | 86 mm | Ok | Chiba in December |