Barton Reservoir Weather Forecast
- 35
- 60
Mostly Sunny
- 36
- 63
Partly Sunny
- 38
- 64
Partly Sunny
- 43
- 67
Mostly Cloudy
- 37
- 60
Rain Showers
- 30
- 52
Rain Showers Likely
Today 21 Oct Lower Treasure Valley
Areas of fog this morning. Sunny. Highs 57 to 62. Light Winds.
Tonight 21 Oct Lower Treasure Valley
Mostly clear. Lows 32 to 37. Light Winds.
Barton Reservoir Temperature Statistics
October Temperature
Ontario Municipal Airport (21.7 miles)
Lowest 7 October, 2025
36 °FAverage October
55 °FHighest 10 October, 2025
80.1 °F
Climate (2020–Present)
Ontario Municipal Airport (21.7 miles)
Average Low 2020–2025
42.6 °FAverage 2020–2025
54.6 °FAverage High 2020–2025
67 °F