La Grande Reservoir Weather Forecast
- 47
- 75
Mostly Sunny
- 40
- 75
Partly Sunny
- 41
- 64
Partly Sunny
- 36
- 60
Rain Showers
- 34
- 50
Chance Rain Showers
- 36
- 57
Mostly Sunny
- 38
- 60
Partly Sunny
Today 9 Sep Southern Blue Mountains of Oregon
Sunny. Highs in the mid 70s to lower 80s.
Tonight 9 Sep Southern Blue Mountains of Oregon
Mostly clear. Lows in the upper 40s to mid 50s.
La Grande Reservoir Temperature Statistics
September Temperature
La Grande/Union County Airport (13.7 miles)
Lowest 4 September, 2026
39 °FAverage September
57 °FHighest 1 September, 2026
82 °F
Climate (2021–2026)
La Grande/Union County Airport (13.7 miles)
Average Low 2021–2026
38.3 °FAverage 2021–2026
50.5 °FAverage High 2021–2026
62.7 °F