- WinterDec–Feb47°68°
- December46°67°
- January47°68°
- February48°70°
- SpringMar–May52°76°
- March50°73°
- April52°77°
- May56°79°
- SummerJun–Aug62°88°
- June59°84°
- July63°89°
- August64°92°
- AutumnSep–Nov57°83°
- September63°90°
- October58°83°
- November51°75°
Pasadena, CA Weather by Month and Climate Averages
Pasadena, CA gets 20.1 in of precipitation a year over about 42 rainy days. August is the warmest month (average high 92°F) and December the coldest (average low 46°F).
Pasadena climate at a glance
Mediterranean climate
Pasadena, CA has hot summers and warm winters. Daytime highs range from about 67°F in December to 92°F in August. February is usually the wettest month. The most comfortable time to visit is typically January, March to May, and November to December, when daytime highs sit near 73°F.
How much rain does Pasadena get?
Pasadena gets 20.1 in of precipitation in an average year, spread over about 42 days with measurable rain. That is fewer rainy days than 87% of the US.
February is the wettest month, with 5.2 in. August is the driest, with 0.0 in. February has the most rainy days, about 8.
The longest dry spell in the last five years lasted 166 days, to November 22, 2024.
See where Pasadena ranks: rainiest cities in the US, US cities with the most rainy days, rainiest cities in California.
Pasadena weather by month
Pasadena weather in January
In January, Pasadena averages a high of 68°F and a low of 47°F. It gets 4.5 in of precipitation over about 7 rainy days. The sun is out about 57% of daylight hours. The January record high is 93°F (1971) and the record low is 29°F (1979). January is one of the most comfortable months to visit.
Pasadena weather in February
In February, Pasadena averages a high of 70°F and a low of 48°F. It gets 5.2 in of precipitation over about 8 rainy days. The sun is out about 64% of daylight hours. The February record high is 96°F (2026) and the record low is 27°F (1990).
Pasadena weather in March
In March, Pasadena averages a high of 73°F and a low of 50°F. It gets 3.0 in of precipitation over about 6 rainy days. The sun is out about 52% of daylight hours. The March record high is 101°F (2026) and the record low is 32°F (1990). March is one of the most comfortable months to visit.
Pasadena weather in April
In April, Pasadena averages a high of 77°F and a low of 52°F. It gets 1.1 in of precipitation over about 3 rainy days. The sun is out about 62% of daylight hours. The April record high is 105°F (1989) and the record low is 35°F (1975). April is one of the most comfortable months to visit.
Pasadena weather in May
In May, Pasadena averages a high of 79°F and a low of 56°F. It gets 0.5 in of precipitation over about 3 rainy days. The sun is out about 67% of daylight hours. The May record high is 104°F (2014) and the record low is 38°F (1990). May is one of the most comfortable months to visit.
Pasadena weather in June
In June, Pasadena averages a high of 84°F and a low of 59°F. It gets 0.2 in of precipitation over about 2 rainy days. The sun is out about 75% of daylight hours. The June record high is 110°F (1990) and the record low is 41°F (1998).
Pasadena weather in July
In July, Pasadena averages a high of 89°F and a low of 63°F. It gets 0.1 in of precipitation over about 1 rainy days. The sun is out about 88% of daylight hours. The July record high is 113°F (2018) and the record low is 47°F (1983).
Pasadena weather in August
In August, Pasadena averages a high of 92°F and a low of 64°F. It gets 0.0 in of precipitation over about 0 rainy days. The sun is out about 86% of daylight hours. The August record high is 109°F (2020) and the record low is 50°F (1990).
Pasadena weather in September
In September, Pasadena averages a high of 90°F and a low of 63°F. It gets 0.2 in of precipitation over about 1 rainy days. The sun is out about 82% of daylight hours. The September record high is 115°F (2020) and the record low is 46°F (1987).
Pasadena weather in October
In October, Pasadena averages a high of 83°F and a low of 58°F. It gets 0.8 in of precipitation over about 3 rainy days. The sun is out about 78% of daylight hours. The October record high is 108°F (1991) and the record low is 37°F (1971).
Pasadena weather in November
In November, Pasadena averages a high of 75°F and a low of 51°F. It gets 1.1 in of precipitation over about 3 rainy days. The sun is out about 71% of daylight hours. The November record high is 101°F (2010) and the record low is 31°F (1976). November is one of the most comfortable months to visit.
Pasadena weather in December
In December, Pasadena averages a high of 67°F and a low of 46°F. It gets 3.3 in of precipitation over about 6 rainy days. The sun is out about 54% of daylight hours. The December record high is 88°F (2021) and the record low is 26°F (1990). December is one of the most comfortable months to visit.
Sunshine, humidity and wind in Pasadena
July is the sunniest month in Pasadena, with sunshine about 88% of daylight hours. March is the cloudiest, at 52%. Over the year the sun shines about 70% of daylight hours. Pasadena is sunnier than 97% of the US.
Humidity peaks in May at 55% and is lowest in November at 32%.
Pasadena has about 70 days a year above 90°F. Pasadena is hotter than 80% of the US.
Thunderstorms occur on about 4 days a year.
See where Pasadena ranks: sunniest cities in the US, cloudiest cities in the US, hottest cities in the US.
Pasadena weather records
The hottest temperature on record at the Pasadena station is 115°F, on September 6, 2020. The coldest is 26°F, on December 22, 1990.
The wettest day on record brought 5.5 in of rain, on November 29, 1970.
31 all-time records have been set at the station since 1970.
The annual mean temperature has changed by +0.7°F per decade since 1970.
The best time to visit Pasadena
The most comfortable time to visit is typically January, March to May, and November to December, when daytime highs sit near 73°F.
Winter (December–February) is warm, with average highs around 68°F and lows near 47°F.
Spring (March–May) is warm, with average highs around 76°F and lows near 52°F.
Summer (June–August) is hot, with average highs around 88°F and lows near 62°F.
Autumn (September–November) is hot, with average highs around 83°F and lows near 57°F.
Monthly climate
| Month | Precip | Rain days | Humidity | Sunshine | Sea temp | Record high | Record low |
|---|---|---|---|---|---|---|---|
| January | 4.5 in | 7 | 48% | 57% | 58° | 93° | 29° |
| February | 5.2 in | 8 | 38% | 64% | 58° | 96° | 27° |
| March | 3.0 in | 6 | 54% | 52% | 57° | 101° | 32° |
| April | 1.1 in | 3 | 52% | 62% | 58° | 105° | 35° |
| May | 0.48 in | 3 | 55% | 67% | 61° | 104° | 38° |
| June | 0.21 in | 2 | 51% | 75% | 64° | 110° | 41° |
| July | 0.06 in | 1 | 45% | 88% | 66° | 113° | 47° |
| August | 0.03 in | 0 | 43% | 86% | 68° | 109° | 50° |
| September | 0.22 in | 1 | 45% | 82% | 68° | 115° | 46° |
| October | 0.84 in | 3 | 38% | 78% | 66° | 108° | 37° |
| November | 1.1 in | 3 | 32% | 71% | 61° | 101° | 31° |
| December | 3.3 in | 6 | 43% | 54% | 59° | 88° | 26° |
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Pasadena climate questions
How much rain does Pasadena get?
Pasadena gets 20.1 in of precipitation in an average year, over about 42 rainy days.
What is the wettest month in Pasadena?
February is the wettest month in Pasadena, with 5.2 in. August is the driest, with 0.0 in.
How many rainy days does Pasadena have a year?
Pasadena has about 42 days with measurable rain in an average year. February has the most, about 8.
What is the hottest month in Pasadena?
August is the warmest month in Pasadena, with an average high of 92°F.
What is the coldest month in Pasadena?
December is the coldest month in Pasadena, with an average low of 46°F.
What is the record high temperature in Pasadena?
The record high at the Pasadena station is 115°F, set on September 6, 2020. The record low is 26°F, on December 22, 1990.
What is the sunniest month in Pasadena?
July is the sunniest month in Pasadena, with sunshine about 88% of daylight hours. March is the cloudiest.
What is the best time to visit Pasadena?
The most comfortable time to visit is typically January, March to May, and November to December, when daytime highs sit near 73°F.
Source: NOAA GHCN-Daily station PASADENA (0 km away).
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Normals from NOAA GHCN-Daily station PASADENA.