Zip 78666 (San Marcos, TX) Climate

The climate in San Marcos, TX 78666 is generally mild throughout the year. The temperatures range from an average high of 87°F in July to an average low of 47°F in January. Average annual rainfall for the area is approximately 32 inches, with June being the wettest month and December being the driest. Humidity levels tend to be higher during the summer months and a moderate amount of sunshine can be expected year round.

San Marcos (zip 78666), Texas gets 35 inches of rain, on average, per year. The US average is 38 inches of rain per year.

San Marcos (zip 78666) averages 0 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 229 sunny days per year in San Marcos (zip 78666). The US average is 205 sunny days.

San Marcos (zip 78666) gets some kind of precipitation, on average, 83 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 94 degrees
Winter Low: the January low is 39
Rain: averages 35 inches of rain a year
Snow: averages 0 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for the 78666 zip code is 7.2 (10=best), which means it is more comfortable than most places in Texas.

3.8 Summer - 7.9 Winter

April, October and November are the most pleasant months in the 78666 zip code, while August and July are the least comfortable months.

Climate	San Marcos, Texas	United States
	Unlock	38.1 in.
	0.1 in.	Unlock
	Unlock	106.2 days
	229 days	Unlock
	94.3°	85.8°
	Unlock	21.7°
	7.2	Unlock
	Unlock	4.3
	587 ft.	Unlock

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 the 78666 zip code with an average high temperature of 95.5°, which ranks it as about average compared to other places in Texas. In the 78666 zip code, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for the 78666 zip code are April, October and March.

In the 78666 zip code, there are 103.9 days annually when the high temperature is over 90°, which is hotter than most places in Texas.

January has the coldest nighttime temperatures for the 78666 zip code with an average of 39.1°. This is warmer than most places in Texas.

In the 78666 zip code, there are 20.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Texas.

In the 78666 zip code, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Texas.

Humidity in the 78666 zip code can be uncomfortable during the summer, but comfortable for most of the year. The most uncomfortably humid months are July, June and August. The humid season runs from May-September and the most comfortable months are October-April.

October is the wettest month in the 78666 zip code with 4.4 inches of rain, and the driest month is August with 2.0 inches. The wettest season is Winter with 30% of yearly precipitation and 19% occurs in Spring, which is the driest season. The annual rainfall of 35.2 inches in the 78666 zip code means that it is about average compared to other places in Texas.

May is the rainiest month in the 78666 zip code with 8.1 days of rain, and August is the driest month with only 4.9 rainy days. There are 83.1 rainy days annually in the 78666 zip code, which is rainier than most places in Texas. The rainiest season is Spring when it rains 27% of the time and the driest is Autumn with only a 21% chance of a rainy day.

An annual snowfall of 0.1 inches in the 78666 zip code means that it is less snowy than most places in Texas. January is the snowiest month in the 78666 zip code with 0.1 inches of snow, and no months of the year have significant snowfall.

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