Today
Season over
3 of 3 cities
Window last spring
11 days
median gap from 50°F to 55°F
Soil today
32°F
median, 0–4 in
Never below 50°F
0
cities with no spring window
Every Alaska city
Spring 2026 dates and today's verdict.
| City | Held 50°F (2026) | Held 55°F (2026) | Soil today | Today |
|---|---|---|---|---|
| Anchorage, AK | Jun 3 | – | 32°F | Season over |
| Fairbanks, AK | Jun 4 | Jun 15 | 21°F | Season over |
| Juneau, AK | – | – | 36°F | Season over |
Crabgrass seeds start to germinate once the top 2 to 4 inches of soil stay near 55°F for several days. A pre-emergent works as a barrier in the soil, so it has to be down and watered in before that: the usual advice is to apply it while the soil holds 50 to 55°F. The dates here are when the modelled soil began to hold each temperature last spring; this year's window will move with the weather, which is why each city page shows today's reading and the 7-day forecast.
Questions
- When should I put down crabgrass preventer in Alaska?
- When the soil holds 50 to 55°F. Last spring that was around Jun 4 to Jun 15 across 1 Alaska cities, earlier in the south and in cities.
- Is it too late to apply pre-emergent?
- Once the soil has held 55°F for a week or more, crabgrass is germinating and a pre-emergent will not stop the seedlings already up. Each city page says which side of that line it is on today.
Soil temperature today in Alaska →
Data: Global Forecast System (GFS) 0.25°, soil temperature 0–10 cm (TSOIL) (NOAA National Centers for Environmental Prediction (NCEP)); GeoNames gazetteer (cities15000) (GeoNames).