Annual mean 18°C · wettest around January · prevailing wind SW
Warmest
29.4 °C
Coldest
16.8 °C
Wettest
19%
Windiest
4.1 m/s
Prevailing
SW
3.4 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 Mission Viejo over the whole year is 18°C. August is the hottest month, with highs of about 29°C; January is the coldest, with lows of about 9°C. Mission Viejo has no sharply defined rainy season: the chance of rain on a given day runs from 2% in July, the driest month, to 17% in January, the wettest. Winds in Mission Viejo are highest in May, averaging 2.6 m/s (9 km/h), and lightest in November, at 1.8 m/s (6 km/h). The prevailing wind is from the SW. The clearest skies in Mission Viejo come in November, when the sky is typically 25% covered; May is the cloudiest month, at 53%.
Month by month Mission Viejo 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%
1.9 m/s
54
1
88
February
18°C
9°C
15°C
17%
34%
2.2 m/s
55
4
83
March
18°C
10°C
15°C
16%
42%
2.4 m/s
57
3
85
April
21°C
12°C
18°C
8%
41%
2.5 m/s
76
10
82
May
21°C
15°C
19°C
6%
53%
2.6 m/s
84
11
81
June
25°C
17°C
23°C
3%
47%
2.5 m/s
80
30
58
July
28°C
19°C
26°C
2%
32%
2.6 m/s
61
55
29
August
29°C
20°C
28°C
5%
30%
2.4 m/s
55
63
20
September
28°C
18°C
26°C
5%
33%
2.2 m/s
64
49
32
October
26°C
15°C
23°C
8%
29%
2.0 m/s
78
35
52
November
22°C
11°C
19°C
11%
25%
1.8 m/s
82
12
76
December
18°C
9°C
16°C
15%
31%
1.8 m/s
64
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 Mission Viejo weather by season
Year round, Mission Viejo has days of about 18°C at their warmest in January, its coolest month, and 29°C in August, its warmest; the coolest hours of the day run from 9°C to 20°C through the year, and the average temperature over the year is 18°C around the clock. Rain is most likely around January and least likely around July. 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.
Mission Viejo weather in winterDecember to February
High 18°CLow 9°CRain 16%
Winter in Mission Viejo has typical daily highs of about 18°C and lows of about 9°C, with a 16% chance of rain on a given day.
Mission Viejo weather in springMarch to May
High 20°CLow 12°CRain 10%
Spring in Mission Viejo has typical daily highs of about 20°C and lows of about 12°C, with a 10% chance of rain on a given day.
Mission Viejo weather in summerJune to August
High 27°CLow 19°CRain 3%
Summer in Mission Viejo has typical daily highs of about 27°C and lows of about 19°C, with a 3% chance of rain on a given day.
Mission Viejo weather in autumnSeptember to November
High 25°CLow 15°CRain 8%
Autumn in Mission Viejo 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 Mission Viejo?
Mission Viejo has no sharply defined rainy season: the chance of rain on a given day runs from 2% in July, the driest month, to 17% in January, the wettest.
What time of year is Mission Viejo windiest?
Winds in Mission Viejo are highest in May, averaging 2.6 m/s (9 km/h), and lightest in November, at 1.8 m/s (6 km/h). The prevailing wind is from the SW.
What is the average temperature in Mission Viejo year round?
The average temperature in Mission Viejo over the whole year is 18°C. August is the hottest month, with highs of about 29°C; January is the coldest, with lows of about 9°C.