Tomatoes · Nov 11, 2026
Soil temperature for tomatoes
Cities warm enough for tomatoes today
Largest cities whose 5-day mean is 60°F or more.
| City | Soil today | 5-day mean |
|---|---|---|
| Los Angeles, CA | 78°F | 77°F |
| Houston, TX | 68°F | 70°F |
| Phoenix, AZ | 77°F | 77°F |
| San Antonio, TX | 67°F | 65°F |
| San Diego, CA | 78°F | 77°F |
| Dallas, TX | 72°F | 69°F |
| Jacksonville, FL | 74°F | 73°F |
| Fort Worth, TX | 72°F | 69°F |
| San Jose, CA | 63°F | 61°F |
| Austin, TX | 68°F | 66°F |
| Charlotte, NC | 64°F | 63°F |
| San Francisco, CA | 63°F | 62°F |
Seed or transplant
Most gardeners start tomato seed indoors, where a seed-starting mat keeps the mix near 75 to 85°F, and plant out 6 to 8 weeks later. Outdoors the question is the soil the roots go into: in soil under about 60°F transplants stall, and cold nights can still kill them, so wait until the soil holds 60°F and your last frost date has passed. Each city page shows today's reading, the 7-day forecast and the day the soil began to hold 60°F last spring.
Germination figures: Alabama Cooperative Extension System, ANR-1061, Soil Temperature Conditions for Vegetable Seed Germination (revised 2023), Table 1; the figures trace back to J. F. Harrington, University of California, Davis (1954). Numbers are restated, not copied text. The 60°F planting-out rule is common garden guidance, not a hard limit.
Data: Global Forecast System (GFS) 0.25°, soil temperature 0–10 cm (TSOIL) (NOAA National Centers for Environmental Prediction (NCEP)); GeoNames gazetteer (cities15000) (GeoNames).