ZIP 99122 · Washington · Nov 11, 2026
Soil temperature for ZIP code 99122
low 46°F · high 52°F
Modelled by NOAA GFS, not measured · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 7.6 km from the ZIP centre point
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 | 41.0°F | 37.9°F | 46.1°F | analysis |
| Nov 5 | 41.5°F | 39.7°F | 45.2°F | analysis |
| Nov 6 | 39.9°F | 37.3°F | 43.5°F | analysis |
| Nov 7 | 42.5°F | 39.8°F | 47.3°F | analysis |
| Nov 8 | 46.0°F | 44.3°F | 49.5°F | analysis |
| Nov 9 | 44.6°F | 42.2°F | 47.8°F | analysis |
| Nov 10 | 45.9°F | 44.7°F | 46.8°F | analysis |
| Today | 47.8°F | 45.6°F | 52.4°F | analysis |
| Nov 12 | 46.3°F | 44.0°F | 49.4°F | forecast |
| Nov 13 | 45.4°F | 42.9°F | 49.7°F | forecast |
| Nov 14 | 46.7°F | 45.3°F | 49.3°F | forecast |
| Nov 15 | 43.0°F | 42.0°F | 44.4°F | forecast |
| Nov 16 | 43.8°F | 43.2°F | 45.5°F | forecast |
| Nov 17 | 40.5°F | 37.9°F | 43.8°F | forecast |
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 19 |
| 50°F | Pre-emergent window opens | May 1 |
| 55°F | Crabgrass can germinate | May 3 |
| 60°F | Tomatoes | Jun 15 |
| 65°F | Warm-season grass seed | Jun 18 |
This ZIP code area covers about 601 square miles; the reading is for the model grid cell nearest its Census centre point, which can be far from where you are. Try a neighbouring ZIP if it looks off.
Nearby ZIP codes
Today's modelled average.
99147 48°F · 99134 49°F · 99117 48°F · 99040 47°F · 99029 48°F · 99008 49°F · 99154 49°F · 99013 48°F
More: crabgrass timing in Washington · every Washington city · how accurate the model is.
Questions
- What is the soil temperature in ZIP code 99122 today?
- About 48°F on average in the top 4 inches (0–10 cm), low 46°F and high 52°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 7.6 km from the ZIP centre, not a reading from your yard.
- Is it time for crabgrass preventer in 99122?
- The spring window is closed. It opens again when the soil holds 50°F. Last spring the soil held 50°F from May 1 and 55°F from May 3.
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).