Climate in Pasadena, CA

Pasadena, CA has a Mediterranean climate with hot, dry summers and mild winters. The hottest months are July and August, when temperatures can reach up to the low 100s. Winters in Pasadena are mild, with temperatures rarely dropping below freezing. Pasadena also gets quite a bit of rainfall throughout the year, typically between 15-25 inches annually. The area is prone to occasional droughts, however average precipitation levels usually provide enough rain to keep the city's flora and fauna thriving.

Pasadena, California gets 21 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Pasadena averages 0 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 286 sunny days per year in Pasadena. The US average is 205 sunny days.

Pasadena gets some kind of precipitation, on average, 40 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.

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Weather Highlights

Summer High: the July high is around 88 degrees
Winter Low: the January low is 45
Rain: averages 21 inches of rain a year
Snow: averages 0 inches of snow a year

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BESTPLACES COMFORT INDEX

The annual BestPlaces Comfort Index for Pasadena is 9.1 (10=best), which means it is one of the most pleasant places in California.

June, May and October are the most pleasant months in Pasadena, while January and February are the least comfortable months.

August is the hottest month for Pasadena with an average high temperature of 89.1°, which ranks it as about average compared to other places in California. In Pasadena, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Pasadena are May, October and June.

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In Pasadena, there are 49.6 days annually when the high temperature is over 90°, which is about average compared to other places in California.

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December has the coldest nighttime temperatures for Pasadena with an average of 44.3°. This is warmer than most places in California.

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In Pasadena, there are 1.0 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

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In Pasadena, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in California.

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Humidity in Pasadena is generally quite low and comfortable. There are few days during the summer when the humidity becomes unpleasant. The most humid months (but still comfortable) are July, August and June.

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February is the wettest month in Pasadena with 5.2 inches of rain, and the driest month is July with 0.1 inches. The wettest season is Spring with 59% of yearly precipitation and 2% occurs in Autumn, which is the driest season. The annual rainfall of 21.4 inches in Pasadena means that it is wetter than most places in California.

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February is the rainiest month in Pasadena with 6.8 days of rain, and July is the driest month with only 0.5 rainy days. There are 39.7 rainy days annually in Pasadena, which is less rainy than most places in California. The rainiest season is Spring when it rains 46% of the time and the driest is Autumn with only a 6% chance of a rainy day.

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There is rarely any recorded snowfall in Pasadena, ranking it as one of the least snowy places in California. Any measurable snowfall is a rare occurance in Pasadena.

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