August is the hottest month for Fontana with an average high temperature of 95.3°, which ranks it as warmer than most places in California. In Fontana, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Fontana are April, May and October.

August is the hottest month for Fullerton with an average high temperature of 86.7°, which ranks it as cooler than most places in California. In Fullerton, there are 7 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Fullerton are May, June and October.

December has the coldest nighttime temperatures for Fontana with an average of 41.6°. This is warmer than most places in California.

December has the coldest nighttime temperatures for Fullerton with an average of 45.7°. This is one of the warmest places in California.

In Fontana, there are 95.0 days annually when the high temperature is over 90°, which is hotter than most places in California.

In Fullerton, there are 32.4 days annually when the high temperature is over 90°, which is cooler than most places in California.

In Fontana, there are 2.6 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in California.

In Fullerton, there are 0.2 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in California.

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

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

February is the wettest month in Fontana with 3.3 inches of rain, and the driest month is June 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 14.0 inches in Fontana means that it is drier than most places in California.


February is the wettest month in Fullerton with 3.2 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 61% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 13.9 inches in Fullerton means that it is drier than most places in California.

February is the rainiest month in Fontana with 6.8 days of rain, and August is the driest month with only 0.5 rainy days. There are 38.4 rainy days annually in Fontana, which is less rainy than most places in California. The rainiest season is Spring when it rains 47% of the time and the driest is Autumn with only a 5% chance of a rainy day.

January is the rainiest month in Fullerton with 6.3 days of rain, and August is the driest month with only 0.2 rainy days. There are 32.3 rainy days annually in Fullerton, which is less rainy than most places in California. The rainiest season is Spring when it rains 54% of the time and the driest is Autumn with only a 3% chance of a rainy day.

There is rarely any recorded snowfall in Fontana, ranking it as one of the least snowy places in California.

There is rarely any recorded snowfall in Fullerton, ranking it as one of the least snowy places in California.

Any measurable snowfall is a rare occurance in Fontana.

Any measurable snowfall is a rare occurance in Fullerton.

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