Click on a day for an hourly weather forecast
The temperatures in Darien in October are quite cold with temperatures between 9°C and 16°C, warm clothes are a must.
You can expect rain for roughly half of the month of October in Darien. 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 Darien in October 2025.
If you’re planning to visit Darien in the near future, we highly recommend that you review the 14 day weather forecast for Darien before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -1° / -8° | 8 | 18 | 5 | 54 mm | Awful | Darien in January |
| February | 0° / -7° | 8 | 16 | 4 | 62 mm | Awful | Darien in February |
| March | 8° / 0° | 8 | 21 | 3 | 79 mm | Awful | Darien in March |
| April | 14° / 5° | 9 | 21 | 1 | 124 mm | Ok | Darien in April |
| May | 20° / 11° | 10 | 21 | 0 | 134 mm | Ok | Darien in May |
| June | 26° / 17° | 10 | 20 | 0 | 142 mm | Good | Darien in June |
| July | 28° / 19° | 9 | 22 | 0 | 100 mm | Good | Darien in July |
| August | 27° / 19° | 9 | 22 | 0 | 102 mm | Good | Darien in August |
| September | 24° / 15° | 7 | 23 | 0 | 78 mm | Good | Darien in September |
| October | 16° / 9° | 8 | 23 | 0 | 103 mm | Ok | Darien in October |
| November | 9° / 2° | 6 | 24 | 1 | 55 mm | Ok | Darien in November |
| December | 2° / -4° | 7 | 22 | 3 | 62 mm | Awful | Darien in December |