ZIP 78237 · San Antonio, TX · Nov 11, 2026
Soil temperature for ZIP code 78237
low 64°F · high 71°F
Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 10.9 km from the ZIP centre point
What the soil says today
- Pre-emergentSeason over
- Cool-season seedToo late in the season
- Warm-season seedToo cold
- TomatoesSoil warm enough
- Peas and lettuceWarm enough
From the 5-day mean of the modelled 0–4 in layer.
Soil temperature, 0–4 in: last 7 days and next 7
°F, modelled. Dots and line: daily average (dashed = forecast); bars: low to high; green band: 50–55°F.
View as table
| Day | Average | Low | High | |
|---|---|---|---|---|
| Nov 4 | 71.0°F | 66.5°F | 75.8°F | analysis |
| Nov 5 | 71.0°F | 66.1°F | 76.9°F | analysis |
| Nov 6 | 70.7°F | 67.9°F | 73.3°F | analysis |
| Nov 7 | 66.9°F | 65.2°F | 68.3°F | analysis |
| Nov 8 | 64.5°F | 63.4°F | 66.3°F | analysis |
| Nov 9 | 62.4°F | 61.8°F | 62.9°F | analysis |
| Nov 10 | 63.8°F | 62.2°F | 65.6°F | analysis |
| Today | 66.7°F | 63.6°F | 70.9°F | analysis |
| Nov 12 | 67.7°F | 64.3°F | 71.1°F | forecast |
| Nov 13 | 66.5°F | 62.0°F | 70.6°F | forecast |
| Nov 14 | 63.1°F | 61.5°F | 65.6°F | forecast |
| Nov 15 | 61.6°F | 60.7°F | 62.8°F | forecast |
| Nov 16 | 59.2°F | 57.8°F | 60.7°F | forecast |
| Nov 17 | 58.1°F | 56.2°F | 59.8°F | forecast |
Spring 2026 threshold dates
From the 5-day mean held for 10 days or more.
| Soil | What it means | Held from (spring 2026) |
|---|---|---|
| 40°F | Peas and lettuce | never below |
| 50°F | Pre-emergent window opens | Feb 3 |
| 55°F | Crabgrass can germinate | Feb 6 |
| 60°F | Tomatoes | Feb 8 |
| 65°F | Warm-season grass seed | Feb 11 |
Nearby ZIP codes
Today's modelled average.
78207 67°F · 78226 67°F · 78228 67°F · 78225 67°F · 78243 67°F · 78204 67°F · 78201 67°F · 78236 67°F
More: crabgrass timing in Texas · every Texas city · how accurate the model is.
Questions
- What is the soil temperature in ZIP code 78237 today?
- About 67°F on average in the top 4 inches (0–10 cm), low 64°F and high 71°F, from NOAA's GFS model run of Nov 11, 12:00 UTC (7 am Eastern). It is a model value for a grid cell 10.9 km from the ZIP centre, not a reading from your yard.
- Is it time for crabgrass preventer in 78237?
- The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Feb 3 and 55°F from Feb 6.
Data: Global Forecast System (GFS) 0.25°, soil temperature 0–10 cm (TSOIL) (NOAA National Centers for Environmental Prediction (NCEP)); 2025 Gazetteer ZIP Code Tabulation Areas (ZCTA) and 2024 cartographic boundary state outlines (U.S. Census Bureau).