San Marcos, Texas Weather Forecast
Today in San Marcos: clear skies with a high near 85°F and a low around 59°F. Rain chance 0%. Rain chances peak at 32% on Thursday. Highs run 79 to 86°F through Thursday.
Forecast updated 3:05 AM CDT, Oct 23
Active Weather Alerts
7-Day Forecast for San Marcos
Today 10/23
85°59°
Sat 10/24
86°61°
Sun 10/25
82°63°
Mon 10/26
81°58°
Tue 10/27
17%
79°63°
Wed 10/28
13%
82°60°
Thu 10/29
32%
81°61°
Next 24 Hours
| Now | 10 PM | 11 PM | Sat12 AM | 1 AM | 2 AM | 3 AM | 4 AM | 5 AM | 6 AM | 7 AM | 8 AM | 9 AM | 10 AM | 11 AM | 12 PM | 1 PM | 2 PM | 3 PM | 4 PM | 5 PM | 6 PM | 7 PM | 8 PM | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sky |  | | | | | | | |  | | | | | | | | | | | | | | | |
| Temp | 73° | 71° | 69° | 67° | 65° | 64° | 62° | 62° | 61° | 61° | 61° | 62° | 67° | 72° | 76° | 80° | 82° | 84° | 86° | 86° | 85° | 84° | 82° | 79° |
| Rain | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% | 0% |
| Wind | ESE 5 | SE 5 | SSE 4 | SSE 3 | S 2 | SSW 2 | WSW 1 | N 1 | NNW 1 | N 2 | NNE 2 | NE 3 | ENE 3 | ESE 5 | SE 8 | SE 9 | SSE 10 | SSE 10 | SE 10 | SE 10 | SE 9 | SE 9 | ESE 8 | SE 8 |
Growing Conditions
Growing degree days
5,608
since Apr 1, base 50°F
Rain, last 30 days
2.10 in
model analysis
Rain, year to date
41.62 in
since Jan 1
2-inch soil temperature
72°F
yesterday, daily average
Reference ET, last 7 days
1.11 in
FAO-56 grass reference
Through Oct 22. Season totals use model analysis for this point and update every morning.
Soil, ET and spray tools for San Marcos →
Current Stats & Observations
NWS Forecast
About San Marcos Weather
San Marcos sits at about 584 feet above sea level in Hays County, Texas. About 76,218 people live in the San Marcos area. Official forecasts and warnings for the area come from the National Weather Service EWX office, and the nearest NEXRAD radar site is KEWX. The city is in USDA plant hardiness zone 9a, where the coldest winter night typically falls between 20 to 25°F. Over the past ten years the last spring freeze has come around Feb 20 and the first fall freeze around Dec 19.
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