Monthly Historical AveragesSan Marcos, CA
Average Temperature
High
21°
Feels 21
Low
12°
Feels 12
Average Precipitation
2 Days
6.3mm
0cm
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Daily Historical Averages
S
M
T
W
T
F
S
ForecastSunday, May 3, 2026
Day
18°Feels 18
Wind
17 km/h SW
Gust
25 km/h
Humidity
60%
P.O.P
30%
Night
14°Feels 14
Wind
15 km/h W
Gust
22 km/h
Humidity
85%
P.O.P
30%
Historical AveragesMay 3
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity