O'Brien Lake Weather Forecast
- 61
- 93
Mostly Sunny
- 61
- 96
Hot
- 53
- 92
Mostly Sunny
- 52
- 84
Mostly Sunny
- 53
- 84
Mostly Sunny
- 53
- 85
Mostly Sunny
- 55
- 87
Mostly Sunny
Today 30 Jun Upper Columbia Basin
Sunny. Highs in the 90s. North wind 5 to 10 Mph.
Tonight 30 Jun Upper Columbia Basin
Mostly clear. Lows in the 60s. Northwest wind 5 to 10 Mph.
O'Brien Lake Temperature Statistics
June Temperature
Grant County Airport (42.3 miles)
Lowest 15 June, 2025
44.7 °FAverage June
69.7 °FHighest 9 June, 2025
101.6 °F
Climate (2020–Present)
Grant County Airport (42.3 miles)
Average Low 2020–2025
40.9 °FAverage 2020–2025
52.7 °FAverage High 2020–2025
64.2 °F