Happy Valley Reservoir Weather Forecast
- 49
- 83
Mostly Sunny
- 51
- 80
Partly Cloudy
- 52
- 84
Mostly Sunny
- 52
- 82
Partly Sunny
- 46
- 73
Mostly Sunny
- 50
- 80
Mostly Sunny
- 52
- 80
Chance Rain Showers
Today 17 Sep North Central Oregon
Sunny. Highs in the lower to mid 80s. Light wind.
Tonight 17 Sep North Central Oregon
Mostly clear. Lows in the lower to mid 50s. Northwest wind 5 to 10 Mph.
Happy Valley Reservoir Temperature Statistics
September Temperature
The Dalles Municipal Airport (46 miles)
Lowest 15 September, 2025
51.1 °FAverage September
73.9 °FHighest 2 September, 2025
100.9 °F
Climate (2020–Present)
The Dalles Municipal Airport (46 miles)
Average Low 2020–2025
46.1 °FAverage 2020–2025
56.3 °FAverage High 2020–2025
66.9 °F