Annual mean 18°C · wettest around February · prevailing wind SW
Warmest
29.4 °C
Coldest
15.4 °C
Wettest
17%
Windiest
3.9 m/s
Prevailing
SW
3.2 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 Pasadena 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. Pasadena has no sharply defined rainy season: the chance of rain on a given day runs from 2% in July, the driest month, to 15% in February, the wettest. Winds in Pasadena are highest in May, averaging 3.0 m/s (11 km/h), and lightest in November, at 2.0 m/s (7 km/h). The prevailing wind is from the SW. The clearest skies in Pasadena come in August, when the sky is typically 17% covered; May is the cloudiest month, at 39%.
Month by month Pasadena 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
16°C
9°C
13°C
15%
26%
2.1 m/s
44
1
80
February
17°C
9°C
14°C
15%
27%
2.4 m/s
47
4
77
March
17°C
10°C
14°C
14%
33%
2.8 m/s
50
4
78
April
20°C
13°C
18°C
9%
28%
2.9 m/s
70
11
77
May
21°C
15°C
19°C
8%
39%
3.0 m/s
78
14
74
June
25°C
18°C
24°C
4%
32%
3.0 m/s
75
38
49
July
28°C
20°C
27°C
2%
19%
2.9 m/s
53
60
23
August
29°C
20°C
28°C
6%
17%
2.7 m/s
46
67
16
September
27°C
19°C
27°C
5%
22%
2.5 m/s
59
54
28
October
25°C
15°C
23°C
8%
21%
2.2 m/s
75
37
51
November
21°C
11°C
18°C
10%
18%
2.0 m/s
74
11
76
December
17°C
9°C
14°C
14%
24%
2.0 m/s
51
1
83
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 Pasadena weather by season
Year round, Pasadena has days of about 16°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 February 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.
Pasadena weather in winterDecember to February
High 16°CLow 9°CRain 15%
Winter in Pasadena has typical daily highs of about 16°C and lows of about 9°C, with a 15% chance of rain on a given day.
Pasadena weather in springMarch to May
High 19°CLow 13°CRain 10%
Spring in Pasadena has typical daily highs of about 19°C and lows of about 13°C, with a 10% chance of rain on a given day.
Pasadena weather in summerJune to August
High 27°CLow 20°CRain 4%
Summer in Pasadena has typical daily highs of about 27°C and lows of about 20°C, with a 4% chance of rain on a given day.
Pasadena weather in autumnSeptember to November
High 24°CLow 15°CRain 7%
Autumn in Pasadena has typical daily highs of about 24°C and lows of about 15°C, with a 7% chance of rain on a given day.
When is the rainy season in Pasadena?
Pasadena has no sharply defined rainy season: the chance of rain on a given day runs from 2% in July, the driest month, to 15% in February, the wettest.
What time of year is Pasadena windiest?
Winds in Pasadena are highest in May, averaging 3.0 m/s (11 km/h), and lightest in November, at 2.0 m/s (7 km/h). The prevailing wind is from the SW.
What is the average temperature in Pasadena year round?
The average temperature in Pasadena 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.