Click on a day for an hourly weather forecast
The weather in Garden Grove in September is hot. The average temperatures are between 20°C and 28°C.
You can expect a few rainy days in Garden Grove during September, but usually the weather is comfortable in September.
Our weather forecast can give you a great sense of what weather to expect in Garden Grove in September 2025.
If you’re planning to visit Garden Grove in the near future, we highly recommend that you review the 14 day weather forecast for Garden Grove before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 20° / 11° | 3 | 28 | 0 | 70 mm | Good | Garden Grove in January |
| February | 19° / 11° | 2 | 26 | 0 | 68 mm | Good | Garden Grove in February |
| March | 20° / 11° | 2 | 29 | 0 | 44 mm | Good | Garden Grove in March |
| April | 21° / 13° | 1 | 29 | 0 | 23 mm | Good | Garden Grove in April |
| May | 22° / 14° | 1 | 30 | 0 | 15 mm | Good | Garden Grove in May |
| June | 25° / 16° | 0 | 30 | 0 | 4 mm | Perfect | Garden Grove in June |
| July | 27° / 19° | 1 | 30 | 0 | 25 mm | Perfect | Garden Grove in July |
| August | 28° / 20° | 1 | 30 | 0 | 19 mm | Perfect | Garden Grove in August |
| September | 28° / 20° | 1 | 29 | 0 | 15 mm | Perfect | Garden Grove in September |
| October | 25° / 17° | 1 | 30 | 0 | 23 mm | Perfect | Garden Grove in October |
| November | 22° / 14° | 1 | 29 | 0 | 31 mm | Good | Garden Grove in November |
| December | 19° / 11° | 3 | 28 | 0 | 82 mm | Good | Garden Grove in December |