What is the soil temperature in ZIP code 92398 today?

About 66°F on average in the top 4 inches (0–10 cm), low 59°F and high 77°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 9.5 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 92398?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Jan 15 and 55°F from Feb 1.

ZIP 92398 · Barstow, CA · Nov 11, 2026

Soil temperature for ZIP code 92398

66°Faverage today, 0–4 in deep (modelled)
low 59°F · high 77°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 9.5 km from the ZIP centre point

On a week ago

2° warmer

65°F on Nov 4

5-day mean

66°F

what the verdicts use

Held 55°F last spring

Feb 1

crabgrass germination temperature

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	64.8°F	58.4°F	74.2°F	analysis
Nov 5	65.1°F	58.0°F	74.8°F	analysis
Nov 6	65.0°F	58.8°F	73.4°F	analysis
Nov 7	65.4°F	58.0°F	76.3°F	analysis
Nov 8	65.5°F	58.2°F	75.7°F	analysis
Nov 9	65.7°F	58.6°F	75.8°F	analysis
Nov 10	66.3°F	59.1°F	76.9°F	analysis
Today	66.4°F	59.1°F	76.6°F	analysis
Nov 12	66.2°F	59.5°F	75.2°F	forecast
Nov 13	66.2°F	60.0°F	74.0°F	forecast
Nov 14	64.5°F	60.4°F	69.9°F	forecast
Nov 15	64.8°F	58.6°F	73.7°F	forecast
Nov 16	64.2°F	58.9°F	70.1°F	forecast
Nov 17	63.9°F	59.1°F	69.6°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	never below
50°F	Pre-emergent window opens	Jan 15
55°F	Crabgrass can germinate	Feb 1
60°F	Tomatoes	Feb 26
65°F	Warm-season grass seed	Mar 11

Barstow Heights, CA, 22 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

92327 63°F · 92311 65°F · 92365 67°F · 92347 65°F · 92310 63°F · 92342 62°F · 92307 61°F · 92356 62°F

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

Questions

What is the soil temperature in ZIP code 92398 today?: About 66°F on average in the top 4 inches (0–10 cm), low 59°F and high 77°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 9.5 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 92398?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from Jan 15 and 55°F from Feb 1.

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).