Lawn Dominator

Live soil temperature · 2 inches down

Soil temperature in Spokane, WA

Right now · 99201

47.6°FCold

30°40°50°60°70°80°90°
Fall pre-emergent windowAnnual bluegrass germinates below 70°F

Annual bluegrass (Poa annua) and winter annual weeds: First fall window has passed. Most labels call for a second application 8 to 10 weeks after the first. Pre-emergent is a product that stops weed seeds before they sprout, so it only works ahead of germination.

By depth

Surface
44°F
2 in depth
47.6°F
6 in depth
51.9°F

Past 14 days · 24-hour average

35°45°55°65°9/2810/110/410/710/10
Fall pre-emergent window

This week in Spokane

Over the past week, soil 2 inches down in Spokane, WA ranged from 49.6°F to 59.9°F and fell 10.3°F, averaging 56.1°F.

Daily average soil temperature in Spokane, WA 99201 for the past week, by depth
DaySurface2 in6 in
Mon59.8°F59.9°F59.7°F
Tue58.1°F58.9°F59.4°F
Wed55.4°F56.4°F57.7°F
Thu56.1°F56.6°F57.4°F
Fri57.4°F58°F58.6°F
Sat50.9°F53°F55.7°F
Sun47.3°F49.6°F52.9°F

Daily averages from Open-Meteo for Spokane, WA 99201. Readings refresh every six hours.

Interpretation

What this means for your grass.

Bermuda
Bermuda is dormant for the winter. No fertilizer, no PGR. Winter weeds are already up by now, so treat what you can actually see rather than applying a pre-emergent.
Zoysia
Zoysia is dormant or nearly so. Hold all fertilizer and PGR. Winter weeds have already germinated, so treat what is visible instead of applying a pre-emergent.
St. Augustine
St. Augustine is slowing toward winter. Hold nitrogen. Winter weeds are already up, so treat what you can see rather than applying a pre-emergent now.
Cool-season
The best growing range of the year for cool-season grass. This is prime time to fertilize and to overseed. If you are overseeding, do not apply pre-emergent: it stops grass seed the same way it stops weed seed.

Nearest readings

Soil temperature near Spokane

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Weather data from Open-Meteo. Timing guidance follows the sources on when to apply pre-emergent and how to use soil temperature.Data as of Mon, 12 Oct 2026 00:07:25 GMT