Annual mean 17°C · wettest around January · prevailing wind SW
Warmest
28.6 °C
Coldest
16.8 °C
Wettest
19%
Windiest
4.3 m/s
Prevailing
SW
3.5 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in San Juan Capistrano over the whole year is 17°C. August is the hottest month, with highs of about 28°C; January is the coldest, with lows of about 9°C. San Juan Capistrano has no sharply defined rainy season: the chance of rain on a given day runs from 2% in June, the driest month, to 17% in January, the wettest. Winds in San Juan Capistrano are highest in May, averaging 2.6 m/s (9 km/h), and lightest in December, at 1.8 m/s (6 km/h). The prevailing wind is from the SW. The clearest skies in San Juan Capistrano come in November, when the sky is typically 25% covered; May is the cloudiest month, at 56%.
Month by month San Juan Capistrano climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
18°C
9°C
15°C
17%
33%
2.0 m/s
55
1
88
February
18°C
9°C
15°C
16%
34%
2.2 m/s
55
4
84
March
18°C
10°C
15°C
16%
42%
2.4 m/s
57
2
86
April
21°C
12°C
18°C
7%
42%
2.5 m/s
76
8
84
May
21°C
15°C
19°C
5%
56%
2.6 m/s
85
8
84
June
24°C
17°C
22°C
2%
51%
2.5 m/s
85
23
65
July
27°C
19°C
25°C
2%
37%
2.6 m/s
69
50
34
August
28°C
19°C
27°C
4%
33%
2.3 m/s
64
60
25
September
27°C
18°C
26°C
5%
36%
2.2 m/s
69
46
35
October
25°C
15°C
23°C
8%
30%
2.0 m/s
81
31
55
November
22°C
11°C
19°C
10%
25%
1.9 m/s
82
11
77
December
18°C
9°C
16°C
15%
31%
1.8 m/s
65
1
88
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short San Juan Capistrano weather by season
Year round, San Juan Capistrano has days of about 18°C at their warmest in January, its coolest month, and 28°C in August, its warmest; the coolest hours of the day run from 9°C to 19°C through the year, and the average temperature over the year is 17°C around the clock. Rain is most likely around January and least likely around June. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
San Juan Capistrano weather in winterDecember to February
High 18°CLow 9°CRain 16%
Winter in San Juan Capistrano has typical daily highs of about 18°C and lows of about 9°C, with a 16% chance of rain on a given day.
San Juan Capistrano weather in springMarch to May
High 20°CLow 12°CRain 10%
Spring in San Juan Capistrano has typical daily highs of about 20°C and lows of about 12°C, with a 10% chance of rain on a given day.
San Juan Capistrano weather in summerJune to August
High 26°CLow 18°CRain 3%
Summer in San Juan Capistrano has typical daily highs of about 26°C and lows of about 18°C, with a 3% chance of rain on a given day.
San Juan Capistrano weather in autumnSeptember to November
High 25°CLow 15°CRain 8%
Autumn in San Juan Capistrano has typical daily highs of about 25°C and lows of about 15°C, with a 8% chance of rain on a given day.
When is the rainy season in San Juan Capistrano?
San Juan Capistrano has no sharply defined rainy season: the chance of rain on a given day runs from 2% in June, the driest month, to 17% in January, the wettest.
What time of year is San Juan Capistrano windiest?
Winds in San Juan Capistrano are highest in May, averaging 2.6 m/s (9 km/h), and lightest in December, at 1.8 m/s (6 km/h). The prevailing wind is from the SW.
What is the average temperature in San Juan Capistrano year round?
The average temperature in San Juan Capistrano over the whole year is 17°C. August is the hottest month, with highs of about 28°C; January is the coldest, with lows of about 9°C.