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Hourly
7 Days
14 Days
Weekend
Monthly
Precipitation
Temperature
Wind
Temperature Unit Selection
°Celsius
°Fahrenheit
Monthly Historical Averages
Foothill Ranch, CA
Content continues below
May
Average Temperature
High
23°
Feels 24
Low
12°
Feels 11
Average Precipitation
1 Days
Rain amount
3.1mm
Snow amount
0cm
Content continues below
Daily Historical Averages
May 2026
S
M
T
W
T
F
S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
20°
18
23°
19
26°
20
26°
21
25°
22
24°
23
23°
24
21°
25
21°
26
20°
27
21°
28
23°
29
24°
30
24°
31
25°
Forecast
Sunday, May 17, 2026
Day
20°
Feels 20
Wind
14 km/h S
Gust
21 km/h
Humidity
58%
P.O.P
20%
Night
13°
Feels 13
Wind
13 km/h S
Gust
19 km/h
Humidity
85%
P.O.P
20%
Historical Averages
May 17
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.