ZIP 33440 · Clewiston, FL · Nov 11, 2026
Soil temperature for ZIP code 33440
low 74°F · high 78°F
Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 6.1 km from the ZIP centre point
What the soil says today
- Pre-emergentSeason over
- Cool-season seedToo late in the season
- Warm-season seedWarm enough
- 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 | 75.7°F | 73.7°F | 77.6°F | analysis |
| Nov 5 | 76.6°F | 74.2°F | 78.8°F | analysis |
| Nov 6 | 77.1°F | 74.1°F | 79.6°F | analysis |
| Nov 7 | 76.8°F | 74.2°F | 78.5°F | analysis |
| Nov 8 | 75.4°F | 73.1°F | 76.8°F | analysis |
| Nov 9 | 74.6°F | 71.5°F | 76.8°F | analysis |
| Nov 10 | 75.7°F | 73.0°F | 77.6°F | analysis |
| Today | 76.7°F | 74.2°F | 78.5°F | analysis |
| Nov 12 | 75.4°F | 73.9°F | 76.2°F | forecast |
| Nov 13 | 72.8°F | 71.9°F | 73.9°F | forecast |
| Nov 14 | 65.8°F | 64.2°F | 67.9°F | forecast |
| Nov 15 | 64.2°F | 60.7°F | 68.0°F | forecast |
| Nov 16 | 68.0°F | 67.0°F | 69.3°F | forecast |
| Nov 17 | 69.3°F | 69.0°F | 69.6°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 | never below |
| 55°F | Crabgrass can germinate | Feb 7 |
| 60°F | Tomatoes | Feb 9 |
| 65°F | Warm-season grass seed | Jan 6 |
This ZIP code area covers about 726 square miles; the reading is for the model grid cell nearest its Census centre point, which can be far from where you are. Try a neighbouring ZIP if it looks off.
Nearby ZIP codes
Today's modelled average.
33493 76°F · 34142 80°F · 33930 79°F · 33935 78°F · 33471 78°F · 33430 76°F · 33476 77°F · 33936 79°F
More: crabgrass timing in Florida · every Florida city · how accurate the model is.
Questions
- What is the soil temperature in ZIP code 33440 today?
- About 77°F on average in the top 4 inches (0–10 cm), low 74°F and high 78°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 6.1 km from the ZIP centre, not a reading from your yard.
- Is it time for crabgrass preventer in 33440?
- Soil here stayed above 50°F all last winter, so the 50 to 55°F soil rule gives no spring window. Time pre-emergent to your local calendar.
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).