Weatheo

Pasadena Weather by Month

Average temperatures, rainfall and humidity for Pasadena, United States, month by month, built from OpenWeather's historical records. Use it to see what a typical Pasadena month looks like before you travel — then check the live Pasadena forecast for the days ahead.

Warmest month

August

34°C average high

Coolest month

January

8°C average low

Wettest month

September

120 mm of rain

Driest month

February

53 mm of rain

Average temperature and rainfall in Pasadena by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

MonthAvg highAvg lowRecord low / highRainfallHumidityWind
January18°C8°C-7°C / 29°C
81 mm
72%15 km/h
February20°C11°C-10°C / 30°C
53 mm
75%16 km/h
March24°C15°C-2°C / 32°C
59 mm
71%17 km/h
April26°C17°C4°C / 33°C
68 mm
73%18 km/h
May30°C21°C7°C / 35°C
108 mm
75%16 km/h
June33°C25°C19°C / 39°C
111 mm
75%14 km/h
July34°C25°C20°C / 40°C
58 mm
73%12 km/h
August34°C25°C21°C / 42°C
102 mm
72%12 km/h
September32°C23°C14°C / 39°C
120 mm
74%12 km/h
October28°C18°C4°C / 36°C
80 mm
71%13 km/h
November23°C13°C-2°C / 31°C
60 mm
73%14 km/h
December20°C11°C-8°C / 28°C
69 mm
75%14 km/h

Best time to visit Pasadena

The most comfortable time to visit Pasadena is generally March to April and November, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around September, totalling about 969 mm a year.

Travellers who prefer heat should aim for August, when highs average 34°C. September is the month to avoid if rain would spoil your plans — it averages 120 mm, roughly 2× the rainfall of February.

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Pasadena forecast for what is happening now.

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