Click on a day for an hourly weather forecast
The temperatures in Falmouth during September are extremely high, between 27°C and hot as 30°C, drinking water regularly is advisable.
You can expect rain for roughly half of the month of September in Falmouth. 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 Falmouth in September 2025.
If you’re planning to visit Falmouth in the near future, we highly recommend that you review the 14 day weather forecast for Falmouth before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 27° / 23° | 2 | 29 | 0 | 63 mm | Perfect | Falmouth in January |
| February | 27° / 23° | 2 | 26 | 0 | 55 mm | Perfect | Falmouth in February |
| March | 27° / 23° | 3 | 28 | 0 | 58 mm | Perfect | Falmouth in March |
| April | 28° / 24° | 4 | 26 | 0 | 78 mm | Perfect | Falmouth in April |
| May | 28° / 25° | 8 | 23 | 0 | 145 mm | Good | Falmouth in May |
| June | 29° / 26° | 5 | 25 | 0 | 116 mm | Good | Falmouth in June |
| July | 29° / 26° | 7 | 24 | 0 | 104 mm | Ok | Falmouth in July |
| August | 30° / 26° | 8 | 23 | 0 | 108 mm | Ok | Falmouth in August |
| September | 30° / 27° | 10 | 20 | 0 | 158 mm | Ok | Falmouth in September |
| October | 29° / 26° | 10 | 21 | 0 | 195 mm | Ok | Falmouth in October |
| November | 28° / 25° | 5 | 25 | 0 | 121 mm | Perfect | Falmouth in November |
| December | 27° / 24° | 3 | 28 | 0 | 90 mm | Perfect | Falmouth in December |