4-Inch Soil Temperature in Arkansas
The current average 4-inch soil temperature across Arkansas is 84°F, measured at 7 USDA and NOAA monitoring stations. Readings range from 78°F to 112°F. Soil across Arkansas is running 9°F above the seasonal normal of 76°F for late September, based on 7 of 7 stations with historical records. Last updated September 23, 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 Arkansas (7)
| Station | 4" Temp | Last Reading |
|---|---|---|
| Uapb-Lonoke Farm (Lonoke) | 79°F | 2026-09-23 |
| Uapb Campus-PB (Jefferson) | 80°F | 2026-09-23 |
| Uapb-Marianna (Lee) | 112°F | 2026-09-12 |
| Uapb-Earle (Crittenden) | 82°F | 2026-09-23 |
| Uapb Point Remove (Pope) | 79°F | 2026-09-23 |
| Uapb Dewitt (Arkansas) | 81°F | 2026-09-23 |
| Batesville 8 WNW | 78°F | 2026-09-23 |
Cities in Arkansas (40)
| City | ZIP | Current Temp |
|---|---|---|
| Arkadelphia | 71923 | 80°F |
| Batesville | 72501 | 78°F |
| Bella Vista | 72714 | — |
| Benton | 72015 | 80°F |
| Bentonville | 72712 | — |
| Blytheville | 72315 | 82°F |
| Bryant | 72022 | 80°F |
| Camden | 71701 | 80°F |
| Cherokee Village | 72525 | 78°F |
| Conway | 72032 | 79°F |
| El Dorado | 71730 | 80°F |
| Eureka Springs | 72631 | 79°F |
| Fayetteville | 72701 | 79°F |
| Forrest City | 72335 | 112°F |
| Fort Smith | 72901 | 79°F |
| Harrison | 72601 | 79°F |
| Heber Springs | 72543 | 78°F |
| Hope | 71801 | — |
| Hot Springs National Park | 71901 | 79°F |
| Hot Springs Village | 71909 | 79°F |
| Jacksonville | 72076 | 79°F |
| Jonesboro | 72401 | 82°F |
| Little Rock | 72201 | 79°F |
| Magnolia | 71753 | 80°F |
| Monticello | 71655 | 80°F |
| Mountain Home | 72653 | 78°F |
| Norfork | 72658 | 78°F |
| North Little Rock | 72114 | 79°F |
| Oden | 71961 | 79°F |
| Paragould | 72450 | 82°F |
| Pine Bluff | 71601 | 80°F |
| Rogers | 72756 | — |
| Russellville | 72801 | 79°F |
| Searcy | 72143 | 79°F |
| Springdale | 72762 | 79°F |
| Timbo | 72657 | 78°F |
| Van Buren | 72956 | 79°F |
| Walnut Ridge | 72439 | 82°F |
| West Memphis | 72301 | 82°F |
| White Hall | 71602 | 80°F |
4-Inch Soil Temperature FAQ for Arkansas
What is the current 4-inch soil temperature in Arkansas?
The current average 4-inch soil temperature across Arkansas is 84°F, measured at 7 USDA and NOAA stations. Readings range from 78°F to 112°F depending on location and elevation. Soil across Arkansas is running 9°F above the seasonal normal of 76°F for late September, based on 7 of 7 stations with historical records.
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 Arkansas soil temperature directory (all depths), the national soil temperature by depth comparison, or the live national soil temperature map.