4-Inch Soil Temperature in Indiana
The current average 4-inch soil temperature across Indiana is 66°F, measured at 1 USDA and NOAA monitoring stations. Readings range from 66°F to 66°F. Last updated September 29, 2026.
Why the 4-Inch Reading
Every reading here is measured at native 4-inch depth by USDA SCAN (Soil Climate Analysis Network) and NOAA USCRN (US Climate Reference Network) stations, not modeled. The 4-inch root-zone temperature changes more slowly than the surface, making it the steadier signal for established-lawn and garden timing: pre-emergent and broadleaf herbicide windows, fertilizer applications, and core aeration.
Stations Measuring 4-Inch Depth in Indiana (1)
| Station | 4" Temp | Last Reading |
|---|---|---|
| Bedford 5 WNW | 66°F | 2026-09-29 |
Cities in Indiana (34)
| City | ZIP | Current Temp |
|---|---|---|
| Anderson | 46011 | 66°F |
| Bloomington | 47401 | 66°F |
| Carmel | 46032 | 66°F |
| Columbus | 47201 | 66°F |
| Crawfordsville | 47933 | 66°F |
| Crown Point | 46307 | — |
| Elkhart | 46514 | — |
| Evansville | 47701 | 66°F |
| Fishers | 46037 | 66°F |
| Fort Wayne | 46801 | — |
| Gary | 46401 | — |
| Goshen | 46526 | — |
| Greenwood | 46142 | 66°F |
| Hammond | 46320 | — |
| Indianapolis | 46201 | 66°F |
| Jasper | 47546 | 66°F |
| Jeffersonville | 47130 | 66°F |
| Kokomo | 46901 | — |
| La Porte | 46350 | — |
| Lafayette | 47901 | — |
| Marion | 46952 | — |
| Merrillville | 46410 | — |
| Michigan City | 46360 | — |
| Mishawaka | 46544 | — |
| Muncie | 47302 | — |
| New Albany | 47150 | 66°F |
| Newburgh | 47629 | 66°F |
| Noblesville | 46060 | 66°F |
| Richmond | 47374 | — |
| South Bend | 46601 | — |
| Terre Haute | 47801 | 66°F |
| Valparaiso | 46383 | — |
| Warsaw | 46580 | — |
| West Lafayette | 47906 | — |
4-Inch Soil Temperature FAQ for Indiana
What is the current 4-inch soil temperature in Indiana?
The current average 4-inch soil temperature across Indiana is 66°F, measured at 1 USDA and NOAA stations. Readings range from 66°F to 66°F depending on location and elevation.
What does the 4 inch soil temperature mean?
The 4 inch soil temperature shows conditions deeper in the root zone than the 2 inch germination reading. It is commonly used for established lawn, garden, and agricultural timing because it changes more slowly than the surface layer, so it is a steadier signal for fertilizer, aeration, and weed-control decisions.
Why use 4-inch soil temperature instead of 2-inch?
Use 2 inches for germination decisions, since that is where seeds sit. Use the 4 inch soil temperature for established lawn and garden timing: it reads the root zone, changes more slowly than the surface, and is the depth most fertilizer, aeration, and disease guidance references.
See the national 4-inch soil temperature map, the full Indiana soil temperature directory (all depths), the national soil temperature by depth comparison, or the live national soil temperature map.