What is the soil temperature in ZIP code 93541 today?

About 50°F on average in the top 4 inches (0–10 cm), low 42°F and high 60°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 93541?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 13 and 55°F from Mar 16.

ZIP 93541 · California · Nov 11, 2026

Soil temperature for ZIP code 93541

50°Faverage today, 0–4 in deep (modelled)
low 42°F · high 60°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

2° warmer

47°F on Nov 4

5-day mean

50°F

what the verdicts use

Held 55°F last spring

Mar 16

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	47.0°F	40.4°F	56.8°F	analysis
Nov 5	47.6°F	41.7°F	56.7°F	analysis
Nov 6	45.9°F	39.0°F	56.4°F	analysis
Nov 7	47.8°F	40.4°F	59.3°F	analysis
Nov 8	50.3°F	42.5°F	62.0°F	analysis
Nov 9	50.3°F	43.1°F	60.6°F	analysis
Nov 10	49.9°F	42.8°F	60.4°F	analysis
Today	49.5°F	42.2°F	60.4°F	analysis
Nov 12	48.1°F	42.0°F	56.2°F	forecast
Nov 13	46.0°F	40.9°F	52.6°F	forecast
Nov 14	44.8°F	40.2°F	53.2°F	forecast
Nov 15	45.0°F	40.4°F	52.5°F	forecast
Nov 16	44.9°F	40.2°F	52.8°F	forecast
Nov 17	42.9°F	41.3°F	44.4°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	Mar 1
50°F	Pre-emergent window opens	Mar 13
55°F	Crabgrass can germinate	Mar 16
60°F	Tomatoes	Mar 19
65°F	Warm-season grass seed	May 10

Nearby ZIP codes

Today's modelled average.

93529 32°F · 93517 44°F · 95389 47°F · 93512 49°F · 93546 40°F · 89415 50°F · 96107 46°F · 95364 39°F

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

Questions

What is the soil temperature in ZIP code 93541 today?: About 50°F on average in the top 4 inches (0–10 cm), low 42°F and high 60°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 93541?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Mar 13 and 55°F from Mar 16.

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).