What is the soil temperature in ZIP code 97621 today?

About 45°F on average in the top 4 inches (0–10 cm), low 42°F and high 51°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 3 km from the ZIP centre, not a reading from your yard.

Is it time for crabgrass preventer in 97621?

The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 2 and 55°F from May 5.

ZIP 97621 · Oregon · Nov 11, 2026

Soil temperature for ZIP code 97621

45°Faverage today, 0–4 in deep (modelled)
low 42°F · high 51°F

Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 3 km from the ZIP centre point

On a week ago

5° warmer

40°F on Nov 4

5-day mean

44°F

what the verdicts use

Held 55°F last spring

May 5

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	40.1°F	37.0°F	44.4°F	analysis
Nov 5	40.0°F	36.4°F	44.3°F	analysis
Nov 6	40.3°F	36.4°F	46.8°F	analysis
Nov 7	42.8°F	38.8°F	49.8°F	analysis
Nov 8	45.6°F	43.1°F	48.2°F	analysis
Nov 9	42.8°F	40.4°F	46.0°F	analysis
Nov 10	44.3°F	41.7°F	49.2°F	analysis
Today	45.2°F	42.0°F	50.8°F	analysis
Nov 12	45.2°F	42.0°F	49.2°F	forecast
Nov 13	44.8°F	43.8°F	46.9°F	forecast
Nov 14	39.8°F	38.8°F	41.3°F	forecast
Nov 15	38.3°F	37.5°F	39.8°F	forecast
Nov 16	39.6°F	39.1°F	40.3°F	forecast
Nov 17	38.3°F	37.9°F	38.8°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 28
50°F	Pre-emergent window opens	May 2
55°F	Crabgrass can germinate	May 5
60°F	Tomatoes	Jun 15
65°F	Warm-season grass seed	Jun 17

Klamath Falls, OR, 51 km away: the full city page, with the 2026 season chart, growing degree days and nearby cities →

Nearby ZIP codes

Today's modelled average.

97639 45°F · 97622 47°F · 97625 48°F · 97623 46°F · 97624 46°F · 97603 46°F · 97632 49°F · 97633 49°F

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

Questions

What is the soil temperature in ZIP code 97621 today?: About 45°F on average in the top 4 inches (0–10 cm), low 42°F and high 51°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 3 km from the ZIP centre, not a reading from your yard.
Is it time for crabgrass preventer in 97621?: The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 2 and 55°F from May 5.

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).