Forest Grove in September
8.4out of 10
Yes, a good time to go
Warm and comfortable: highs around 25°C. Some rain: about 6 rainy days.
25°CAvg high
12°CAvg low
6Rainy days (42 mm)
12:18 hDaylight
06:58Sunrise · 19:16 Sunset
Why this score
- Warm and comfortable: highs around 25°C
- Some rain: about 6 rainy days
What to wear and pack
- T-shirts and light layers
- A light jacket for cooler evenings
How reliable is the forecast?
Rain in September varies a lot between years (±3.3 rainy days), so check the forecast closer to your trip. 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 | 8°C | 3°C | 172 mm | 17 | – | – | 4.1 |
| February | 10°C | 3°C | 132 mm | 14 | – | – | 5.1 |
| March | 13°C | 4°C | 152 mm | 18 | – | – | 5.0 |
| April | 16°C | 6°C | 116 mm | 16 | – | – | 5.8 |
| May | 20°C | 9°C | 69 mm | 11 | – | – | 7.3 |
| June | 23°C | 11°C | 41 mm | 7 | – | – | 8.1 |
| July | 28°C | 13°C | 11 mm | 2 | – | – | 8.8 |
| August | 28°C | 14°C | 13 mm | 3 | – | – | 8.8 |
| September | 25°C | 12°C | 42 mm | 6 | – | – | 8.4 |
| October | 17°C | 8°C | 106 mm | 12 | – | – | 6.7 |
| November | 11°C | 5°C | 177 mm | 17 | – | – | 4.6 |
| December | 8°C | 2°C | 204 mm | 18 | – | – | 3.8 |
Frequently asked questions
How hot is Forest Grove in September?
Daytime highs average 25°C and nights about 12°C.
When is the best time to visit Forest Grove?
The best months are July, August, September.