Historical Weather Records & Monthly Climate for San Marcos, TX

All-Time High
111°F
All-Time Low
10°F
Max Daily Snow
3.9"
Max Daily Rain
6.53"
Max Snow Depth
0

Monthly Climate Averages for San Marcos, TX

Based on 30 years of historical data (1994 - 2023)

MonthHigh (°F)Low (°F)Precip (in)Snow (in)
January61°44°2.5"0.09"
February65°46°2.52"0.26"
March72°53°3.15"0
April79°60°3.71"0
May85°67°4.61"0
June91°73°3.39"0
July94°75°2.06"0
August95°76°2.75"0
September89°71°3.2"0
October80°62°3.76"0
November70°53°3.02"0.01"
December63°46°2.65"0.02"

Historical Weather Extremes for San Marcos, TX

Based on 80+ years of archive data (1940 - 2024)

🔥
Longest Heatwave
90 Days
1951
Consecutive days ≥ 90°F
🧊
Deepest Freeze
3 Days
1949
Consecutive days ≤ 32°F
🏜️
Longest Drought
45 Days
1993
Consecutive days w/o rain
Wettest Month
9.42"
August 2017
Most rainfall in one month
Snowiest Month
5.13"
January 1985
Most snowfall in one month

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