September is the hottest month for Kailua (Hawaii County) with an average high temperature of 84.5°, which ranks it as about average compared to other places in Hawaii. In Kailua (Hawaii County), there are 12 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Kailua (Hawaii County) are February, January and March.

September is the hottest month for San Francisco with an average high temperature of 69.9°, which ranks it as one of the coolest places in California. In San Francisco, there are 0 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Francisco are September, October and August.

February has the coldest nighttime temperatures for Kailua (Hawaii County) with an average of 64.4°. This is warmer than most places in Hawaii.

January has the coldest nighttime temperatures for San Francisco with an average of 45.5°. This is one of the warmest places in California.

In Kailua (Hawaii County), there are 7.8 days annually when the high temperature is over 90°, which is hotter than most places in Hawaii.

In San Francisco, there are 1.9 days annually when the high temperature is over 90°, which is one of the coolest places in California.

In Kailua (Hawaii County), there are 0.0 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Hawaii.

In San Francisco, there are 0.3 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in California.

In Kailua (Hawaii County), there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Hawaii.

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

December is the wettest month in Kailua (Hawaii County) with 2.5 inches of rain, and the driest month is June with 1.1 inches. The wettest season is Spring with 33% of yearly precipitation and 22% occurs in Autumn, which is the driest season. The annual rainfall of 18.7 inches in Kailua (Hawaii County) means that it is drier than most places in Hawaii.


January is the wettest month in San Francisco with 4.8 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 57% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 24.6 inches in San Francisco means that it is wetter than most places in California.

June is the rainiest month in Kailua (Hawaii County) with 8.9 days of rain, and February is the driest month with only 4.0 rainy days. There are 76.1 rainy days annually in Kailua (Hawaii County), which is less rainy than most places in Hawaii. The rainiest season is Autumn when it rains 32% of the time and the driest is Spring with only a 18% chance of a rainy day.

December is the rainiest month in San Francisco with 11.7 days of rain, and July is the driest month with only 0.6 rainy days. There are 72.3 rainy days annually in San Francisco, which is rainier than most places in California. The rainiest season is Spring when it rains 48% of the time and the driest is Autumn with only a 4% chance of a rainy day.

There is rarely any recorded snowfall in Kailua (Hawaii County), ranking it as one of the least snowy places in Hawaii.

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

Any measurable snowfall is a rare occurance in Kailua (Hawaii County).

Any measurable snowfall is a rare occurance in San Francisco.

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