What is the soil temperature in ZIP code 95443 today?

About 59°F on average in the top 4 inches (0–10 cm), low 56°F and high 63°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 5.6 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 95443?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Feb 27 and 55°F from Mar 15.

ZIP 95443 · Clearlake, CA · Nov 11, 2026

Soil temperature for ZIP code 95443

59°Faverage today, 0–4 in deep (modelled)
low 56°F · high 63°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 5.6 km from the ZIP centre point

On a week ago

8° warmer

51°F on Nov 4

5-day mean

58°F

what the verdicts use

Held 55°F last spring

Mar 15

crabgrass germination temperature

What the soil says today

Pre-emergentSeason over
Cool-season seedToo late in the season
Warm-season seedToo cold
TomatoesToo cold
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	50.7°F	48.9°F	54.9°F	analysis
Nov 5	52.9°F	49.9°F	58.3°F	analysis
Nov 6	56.4°F	53.9°F	61.2°F	analysis
Nov 7	58.3°F	55.9°F	62.7°F	analysis
Nov 8	57.5°F	54.8°F	61.0°F	analysis
Nov 9	58.3°F	56.4°F	61.4°F	analysis
Nov 10	58.8°F	56.4°F	62.9°F	analysis
Today	58.9°F	56.4°F	62.8°F	analysis
Nov 12	57.4°F	55.2°F	59.7°F	forecast
Nov 13	55.2°F	53.3°F	56.6°F	forecast
Nov 14	50.7°F	49.0°F	53.2°F	forecast
Nov 15	49.8°F	48.9°F	51.2°F	forecast
Nov 16	49.1°F	48.6°F	49.7°F	forecast
Nov 17	47.9°F	46.0°F	51.8°F	forecast

Source: NOAA NCEP GFS 0.25°, 0–10 cm soil temperature, run Nov 11, 12:00 UTC (7 am Eastern).

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	Feb 23
50°F	Pre-emergent window opens	Feb 27
55°F	Crabgrass can germinate	Mar 15
60°F	Tomatoes	May 10
65°F	Warm-season grass seed	Jun 12

Clearlake, CA, 14 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

95458 59°F · 95423 59°F · 95422 59°F · 95464 57°F · 95435 59°F · 95451 59°F · 95453 58°F · 95457 60°F

More: crabgrass timing in California · every California city · how accurate the model is.

Questions

What is the soil temperature in ZIP code 95443 today?: About 59°F on average in the top 4 inches (0–10 cm), low 56°F and high 63°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 5.6 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 95443?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Feb 27 and 55°F from Mar 15.

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).