Twin Falls in September
8.7out of 10
Yes, a good time to go
Warm and comfortable: highs around 27°C. Very dry: about 3 rainy days.
27°CAvg high
10°CAvg low
3Rainy days (15 mm)
12:16 hDaylight
07:24Sunrise · 19:40 Sunset
Why this score
- Warm and comfortable: highs around 27°C
- Very dry: about 3 rainy days
What to wear and pack
- T-shirts and light layers
- A light jacket for cooler evenings
- Shorts or a light skirt
How reliable is the forecast?
Rainfall in September is fairly consistent from year to year (2.2 days). Averages cover 30 years (1991–2020). Individual days can differ a lot.
Year at a glance
Weather by month
| Month | Avg high | Avg low | Rainfall | Rainy days | Humidity | Sunshine | Score |
|---|---|---|---|---|---|---|---|
| January | 4°C | -4°C | 38 mm | 9 | – | – | 4.5 |
| February | 7°C | -3°C | 29 mm | 7 | – | – | 5.4 |
| March | 13°C | 1°C | 36 mm | 9 | – | – | 6.4 |
| April | 17°C | 3°C | 35 mm | 8 | – | – | 7.2 |
| May | 23°C | 8°C | 37 mm | 8 | – | – | 8.1 |
| June | 28°C | 11°C | 20 mm | 4 | – | – | 8.6 |
| July | 34°C | 16°C | 5 mm | 2 | – | – | 7.5 |
| August | 33°C | 15°C | 9 mm | 2 | – | – | 7.7 |
| September | 27°C | 10°C | 15 mm | 3 | – | – | 8.7 |
| October | 19°C | 4°C | 23 mm | 5 | – | – | 7.9 |
| November | 10°C | -1°C | 30 mm | 7 | – | – | 6.0 |
| December | 4°C | -4°C | 42 mm | 8 | – | – | 4.6 |
Frequently asked questions
How hot is Twin Falls in September?
Daytime highs average 27°C and nights about 10°C.
When is the best time to visit Twin Falls?
The best months are September, June, May.