Monthly Historical AveragesSaint Helena, CA
Average Temperature
High
28°
Feels 28
Low
11°
Feels 11
Average Precipitation
2 Days
8.3mm
0cm
Content continues below
Daily Historical Averages
S
M
T
W
T
F
S
ForecastWednesday, June 10, 2026
Day
39°Feels 39
Wind
10 km/h N
Gust
14 km/h
Humidity
12%
P.O.P
20%
Night
23°Feels 23
Wind
14 km/h N
Gust
21 km/h
Humidity
40%
P.O.P
0%
Historical AveragesJun 10
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity