San Luis Obispo County, CA Climate

San Luis Obispo County in California is a region of mild, Mediterranean climates with warm summers and mild winters. The average temperature range is from 40 to 75 degrees Fahrenheit throughout the year. San Luis Obispo County receives an average of 18 inches of rain per year, mostly during the cooler months like October through March, while the summer months are usually dry with high temperatures. Temperatures can exceed 100 degrees Fahrenheit in the southern portion of the county during summer months but rarely drop below freezing in winter. Snowfall is rare in San Luis Obispo County and most winter days are mild and temperate.

San Luis Obispo County, California gets 20 inches of rain, on average, per year. The US average is 38 inches of rain per year.

San Luis Obispo County 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 San Luis Obispo County. The US average is 205 sunny days.

San Luis Obispo County gets some kind of precipitation, on average, 50 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.

Weather Highlights

Summer High: the July high is around 78 degrees
Winter Low: the January low is 41
Rain: averages 20 inches of rain a year
Snow: averages 0 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for San Luis Obispo County is 8.6 (10=best), which means it is more comfortable than most places in California.

9.2 Summer - 7.9 Winter

September, June and October are the most pleasant months in San Luis Obispo County, while January and December are the least comfortable months.

Climate	San Luis Obispo, California	United States
	20.0 in.	38.1 in.
	0.0 in.	27.8 in.
	49.5 days	106.2 days
	286 days	205 days
	77.9°	85.8°
	40.8°	21.7°
	8.6	7
	5.3	4.3
	1535 ft.	2443 ft.

Climate

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

August is the hottest month for San Luis Obispo County with an average high temperature of 79.1°, which ranks it as cooler than most places in California. In San Luis Obispo County, there are 6 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for San Luis Obispo County are July, September and August.

In San Luis Obispo County, there are 23.9 days annually when the high temperature is over 90°, which is cooler than most places in California.

December has the coldest nighttime temperatures for San Luis Obispo County with an average of 40.0°. This is warmer than most places in California.

In San Luis Obispo County, there are 14.5 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in California.

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

Humidity in San Luis Obispo County 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 September.

February is the wettest month in San Luis Obispo County with 4.2 inches of rain, and the driest month is July with 0.0 inches. The wettest season is Spring with 59% of yearly precipitation and 1% occurs in Autumn, which is the driest season. The annual rainfall of 20.0 inches in San Luis Obispo County means that it is about average compared to other places in California.

February is the rainiest month in San Luis Obispo County with 9.1 days of rain, and July is the driest month with only 0.3 rainy days. There are 49.5 rainy days annually in San Luis Obispo County, which is about average compared to other places in California. The rainiest season is Spring when it rains 50% of the time and the driest is Autumn with only a 2% chance of a rainy day.

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

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