Cottonwood Bay Weather Forecast
- 60
- 86
Mostly Sunny
- 63
- 91
Partly Sunny
- 61
- 87
Partly Sunny
- 61
- 87
Mostly Sunny
- 66
- 91
Sunny
- 72
- 97
Hot
- 70
- 100
Hot
Today 18 Sep West Side Mountains north of 198
Sunny. Highs 88 to 96.
Tonight 18 Sep West Side Mountains north of 198
Clear until early morning then becoming partly cloudy. Lows 58 to 64. West Winds up to 10 Mph.
Cottonwood Bay Temperature Statistics
September Temperature
Hollister, CA (21.1 miles)
Lowest 14 September, 2026
48.2 °FAverage September
68 °FHighest 9 September, 2026
105.8 °F
Climate (2021–2026)
Hollister, CA (21.1 miles)
Average Low 2021–2026
46.7 °FAverage 2021–2026
58 °FAverage High 2021–2026
72.8 °F