United States · 1991–2020 normal
Happy Valley in
September.
Typical September weather in Happy Valley: 25.5°C by day, 11.5°C at night, 44 mm of rain over 5 wet days. These are measured 1991–2020 station normals, not a forecast.
Typical high25.5°C
Typical low11.5°C
Rain44 mm
Wet days5
Comfort score 86 this month (June leads the year at 89). Daylight is calculated as 12 h 28 from latitude 45.45°.
The evidence behind this page
One month,
from the same station.
- Place identity
- GeoNames 5730183
- NOAA station
- USC00356334 · OREGON CITY
- Station distance
- 11.7 km from the place centre
- Coverage
- Strong coverage · 30 usable years
- Important limit
- Historical climate is not a forecast. Nearby stations can miss mountains, coasts, and local microclimates.