Soil Temperature History for San Marcos, TX
Browse monthly soil temperature records and compare year-over-year trends from the Austin 33 NW monitoring station (52.1 mi away).
Current Soil Temperature
The 2-inch soil temperature near San Marcos, TX is currently 65.7°F — data from the Austin 33 NW monitoring station (52.1 mi away).
Monthly History
Select a month to view daily 2-inch and 4-inch soil temperature readings. Historic pages are only generated for months with at least 80% day coverage from the station, so some recent or incomplete months may not be available yet.
Long-Term Averages for San Marcos
Based on multi-year station data at 2-inch depth, San Marcos sees an annual soil-temperature range of roughly 48°F to 89°F. The warmest months typically average around 83°F in June, 86°F in July, 87°F in August. The coldest months average around 51°F in January, 54°F in February.
These averages are derived from daily readings at the nearest USDA or NOAA station. Individual years can vary by ±5–10°F depending on winter severity and summer heat waves.
How to Use Historical Data
Historical soil temperatures help you plan ahead. By looking at the same month in previous years, you can estimate when soil will warm enough for seeding or when the pre-emergent window typically opens in your area.
For example, if April historically averages 52°F and this April is running 48°F, expect seeding to be delayed by roughly one week. Soil temperature lags air temperature by days or weeks, so historical ground data is more reliable than weather forecasts alone.
Station Information
Data for San Marcos comes from Austin 33 NW. View the station page for full metadata, elevation, and current-year charts.
Current Conditions
Track soil temperature trends in San Marcos
Enter your ZIP code for current readings and historical monthly data from the nearest USDA or NOAA station.