2025 Compare Climate & Weather:
Katy, TX vs San Marcos, TX

Highlights

On average, there are 232 sunny days per year in San Marcos. Katy averages 208 sunny days per year. The US average is 205 sunny days.

San Marcos, Texas gets 35.2 inches of rain, on average, per year. Katy, Texas gets 48 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

San Marcos averages 0.1 inches of snow per year. Katy averages 0 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

San Marcos, Texas
Summer High: the July high is around 94.3 degrees
Winter Low: the January low is 39.1
Rain: averages 35.2 inches of rain a year
Snow: averages 0.1 inches of snow a year

Katy, Texas
Summer High: the July high is around 93.9 degrees
Winter Low: the January low is 42.5
Rain: averages 48 inches of rain a year
Snow: averages 0 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Katy is 6.7 (10=best), which means it is less comfortable than most places in Texas.

Today's Weather - Katy, TX

71°F

Today's Weather - San Marcos, TX

78°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Katy / San Marcos

August is the hottest month for Katy with an average high temperature of 94.6°, which ranks it as cooler than most places in Texas. In Katy, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Katy are April, October and November.

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

January has the coldest nighttime temperatures for Katy with an average of 42.5°. This is warmer than most places in Texas.

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

In Katy, there are 102.1 days annually when the high temperature is over 90°, which is hotter than most places in Texas.

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

In Katy, there are 9.7 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Texas.

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

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

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

October is the wettest month in Katy with 4.8 inches of rain, and the driest month is February with 3.3 inches. The wettest season is Winter with 28% of yearly precipitation and 22% occurs in Spring, which is the driest season. The annual rainfall of 48.0 inches in Katy means that it is wetter than most places in Texas.


October is the wettest month in San Marcos 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 San Marcos means that it is about average compared to other places in Texas.

June is the rainiest month in Katy with 8.4 days of rain, and April is the driest month with only 5.2 rainy days. There are 86.8 rainy days annually in Katy, which is rainier than most places in Texas. The rainiest season is Spring when it rains 27% of the time and the driest is Summer with only a 22% chance of a rainy day.

May is the rainiest month in San Marcos 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 San Marcos, 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.

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

An annual snowfall of 0.1 inches in San Marcos means that it is less snowy than most places in Texas.

Any measurable snowfall is a rare occurance in Katy.

January is the snowiest month in San Marcos with 0.1 inches of snow, and no months of the year have significant snowfall.