Weather in San Marcos, TX
San Marcos, Sunday, 9 August, 05:04
Clear. Feels like 79°. High 96°, low 77°.
0
San Marcos, Monday, 10 August
Clear. High 96°, low 74°.
0
San Marcos, Tuesday, 11 August
Partly cloudy. High 102°, low 75°.
0
San Marcos, Wednesday, 12 August
Mostly clear. High 103°, low 74°.
0San Marcos, Thursday, 13 August
Partly cloudy. High 103°, low 74°.
0
San Marcos, Friday, 14 August
Overcast. High 103°, low 74°.
0.06
San Marcos, Saturday, 15 August
Light rain. High 102°, low 76°.
0San Marcos, Sunday, 16 August
Clear. High 102°, low 73°.
0San Marcos, Monday, 17 August
Clear. High 103°, low 75°.
0San Marcos, Tuesday, 18 August
Clear. High 103°, low 74°.
0San Marcos, Wednesday, 19 August
Clear. High 105°, low 74°.
0San Marcos, Thursday, 20 August
Partly cloudy. High 105°, low 74°.
0.04San Marcos, Friday, 21 August
Light rain. High 106°, low 76°.
0San Marcos, Saturday, 22 August
Mostly clear. High 102°, low 76°.
0San Marcos, Sunday, 23 August
Clear. High 102°, low 74°.
0San Marcos, Monday, 24 August
Clear. High 102°, low 75°.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for San Marcos, TX are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in San Marcos, TX since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
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