Juneau, Alaska · Nov 11, 2026
Soil temperature today in Juneau
low 36°F · high 38°F
Modelled by NOAA GFS · run Nov 11, 12:00 UTC (7 am Eastern) · grid cell 7.4 km from Juneau
What the soil says today
- Pre-emergentSeason over
- Cool-season seedToo late in the season
- Warm-season seedToo cold
- TomatoesToo cold
- Peas and lettuceToo cold
From the 5-day mean of the modelled 0–4 in layer.
Soil temperature, 0–4 in: last 7 days and next 7
°F. Dots and line: daily average (dashed = forecast); bars: the day's low to high; green band: the 50–55°F pre-emergent window.
- Daily average
- Low to high
- 50–55°F window
View as table
| Day | Average | Low | High | |
|---|---|---|---|---|
| Nov 4 | 35.6°F | 34.6°F | 36.9°F | analysis |
| Nov 5 | 38.7°F | 38.4°F | 39.0°F | analysis |
| Nov 6 | 38.3°F | 37.7°F | 38.8°F | analysis |
| Nov 7 | 37.3°F | 36.1°F | 39.3°F | analysis |
| Nov 8 | 34.4°F | 33.9°F | 35.0°F | analysis |
| Nov 9 | 34.7°F | 34.5°F | 34.9°F | analysis |
| Nov 10 | 35.6°F | 35.2°F | 36.1°F | analysis |
| Today | 36.5°F | 36.0°F | 37.6°F | forecast |
| Nov 12 | 36.4°F | 35.7°F | 37.3°F | forecast |
| Nov 13 | 34.0°F | 33.4°F | 34.8°F | forecast |
| Nov 14 | 33.7°F | 33.2°F | 34.9°F | forecast |
| Nov 15 | 34.0°F | 33.8°F | 34.5°F | forecast |
| Nov 16 | 33.6°F | 33.4°F | 34.2°F | forecast |
| Nov 17 | 35.5°F | 35.1°F | 36.1°F | forecast |
What the soil says for each job
Today's verdicts use the 5-day mean of the modelled 0–4 in layer.
| Job | Soil rule | Today |
|---|---|---|
| Crabgrass pre-emergent | Apply while the soil holds 50 to 55°F, before crabgrass germinates at about 55°F | Season over The spring window is closed. It opens again when the soil holds 50°F. |
| Seed or overseed cool-season grass | Fescue, bluegrass and ryegrass germinate best in soil of 50 to 65°F | Too late in the season Past the usual Aug 15 to Oct 15 seeding window (36°F soil today). Seed sown on soil averaging under 40°F simply waits for spring (dormant seeding). |
| Seed warm-season grass | Bermuda, zoysia and centipede need soil of 65°F or more | Too cold 36°F: under 65°F. |
| Plant out tomatoes | Tomato roots want soil of 60°F or more (check your frost date as well) | Too cold 36°F: under 60°F. |
| Sow peas, lettuce and spinach | Cool-weather crops germinate once soil reaches about 40°F | Too cold 36°F: under 40°F. |
The 2026 season so far
°F, daily average of the 0–4 in layer since 1 January (dashed = forecast). Dots: the days the soil began to hold 50°F and 55°F.
- Daily average
- 50–55°F window
When the soil crossed each threshold
2026, from the 5-day mean held for 10 days or more.
| Soil | What it means | Held from (spring 2026) | Fell below (autumn 2026) |
|---|---|---|---|
| 40°F | Peas and lettuce can be sown | Jun 1 | Oct 21 |
| 50°F | Pre-emergent window opens | not reached | Sep 12 |
| 55°F | Crabgrass can germinate | not reached | Aug 20 |
| 60°F | Warm enough for tomatoes | not reached | – |
| 65°F | Warm-season grass seed | not reached | – |
Growing degree days in Juneau
Base 50°F, from 1 January to Nov 8, at the Juneau Airport station (9.8 km).
A growing degree day is each degree that the day's average temperature runs above 50°F. Insects, weeds and crops develop by accumulated GDD, so the number says how far the season has run. Every city.
Questions
- What is the soil temperature in Juneau today?
- About 36°F on average in the top 4 inches (0–10 cm), with a low of 36°F and a high of 38°F, from NOAA's GFS model run of Nov 11, 12:00 UTC (7 am Eastern).
- Is it time to put down crabgrass preventer in Juneau?
- The spring window is closed. It opens again when the soil holds 50°F.
- When did the soil in Juneau reach 55°F this year?
- It did not hold 55°F in the first half of 2026.
- How accurate is a modelled soil temperature?
- Against NOAA's 108 reference stations the model's daily average was off by 4.2°F on average, and within 5°F on 68% of days. A shaded, mulched or watered yard can differ more.
Data: Global Forecast System (GFS) 0.25°, soil temperature 0–10 cm (TSOIL) (NOAA National Centers for Environmental Prediction (NCEP)); Global Historical Climatology Network - Daily (GHCN-Daily), daily maximum and minimum temperature (NOAA National Centers for Environmental Information (NCEI)); GeoNames gazetteer (cities15000) (GeoNames).