Cool-season · fall window
For cool-season lawns (fescue, bluegrass, ryegrass), fall is the best time to plant grass seed in Indiana, with spring the second choice: fall seedlings face less weed competition and mature before summer heat.
Soil Temperature in Indiana
The current average 2-inch soil temperature across Indiana is 79°F, from 1 USDA and NOAA monitoring station. Indiana spans USDA hardiness zones 5b to 7a, cool-season grass country. Last updated August 16, 2026.
Current Planting Conditions
Summer conditions across Indiana with soil averaging 79°F at 2 inches. Warm-season grasses are in peak growth; keep cool-season lawns mowed high and watered deep. The next application windows arrive in fall, starting with pre-emergent as soil falls back through 70°F.
Best Time to Plant Grass Seed in Indiana
Fall seeding also needs a stop date: new seedlings want about six weeks of growth before frost arrives. Your city page estimates the last safe seeding date from its nearest station: see when to plant in Indianapolis, when to plant in Fort Wayne or when to plant in Evansville. Readings current through August 16, 2026: Indiana averages 79°F at 2 inches right now; the Current Planting Conditions section above reads that number against the season.
Average Soil Temperature by Month in Indiana
Historical 2-inch soil temperature normals for Indiana: the median across 1 in-state station with multi-year records. Any given year runs ahead of or behind these values; the live average at the top of this page shows where this year stands.
| Month | Average 2-inch soil temperature |
|---|---|
| January | 37°F |
| February | 38°F |
| March | 47°F |
| April | 55°F |
| May | 65°F |
| June | 72°F |
| July | 76°F |
| August | 75°F |
| September | 70°F |
| October | 60°F |
| November | 49°F |
| December | 42°F |
Grass Seed Germination in Indiana
Grass seed germination
Grass seed germination temperatures across Indiana. Soil warmth varies by location, so check a city page for the live reading and what germinates there now.
| Grass species | Seeding soil temp (2 in) | Days |
|---|---|---|
| Kentucky bluegrass | 50–65°F | 14-30 |
| Tall fescue | 50–65°F | 7-12 |
| Perennial ryegrass | 50–65°F | 5-10 |
| Fine fescue | 50–65°F | 7-14 |
| Bermudagrass | 75–90°F | 10-30 |
Monitoring Stations in Indiana (1)
For root-zone timing (fertilizer, aeration, weed control), see the 4-inch soil temperature for Indiana. For accumulated-heat timing, see growing degree days for Indiana. See the Indiana soil temperature map for the full station view.
Interpolated from the latest 4-inch readings and refreshed daily.
| Station | 2" Temp | Last Reading |
|---|---|---|
| Bedford 5 WNW | 79°F | 2026-08-16 |
Cities in Indiana (34)
| City | ZIP | Current Temp |
|---|---|---|
| Anderson | 46011 | 78°F* |
| Bloomington | 47401 | 79°F |
| Carmel | 46032 | 80°F* |
| Columbus | 47201 | 79°F |
| Crawfordsville | 47933 | 78°F* |
| Crown Point | 46307 | 75°F* |
| Elkhart | 46514 | 76°F* |
| Evansville | 47701 | 81°F |
| Fishers | 46037 | 79°F* |
| Fort Wayne | 46801 | 78°F* |
| Gary | 46401 | 78°F* |
| Goshen | 46526 | 76°F* |
| Greenwood | 46142 | 79°F |
| Hammond | 46320 | 73°F |
| Indianapolis | 46201 | 79°F |
| Jasper | 47546 | 79°F |
| Jeffersonville | 47130 | 79°F |
| Kokomo | 46901 | 77°F* |
| La Porte | 46350 | 74°F* |
| Lafayette | 47901 | 78°F* |
| Marion | 46952 | 77°F* |
| Merrillville | 46410 | 76°F* |
| Michigan City | 46360 | 75°F* |
| Mishawaka | 46544 | 75°F* |
| Muncie | 47302 | 78°F* |
| New Albany | 47150 | 79°F |
| Newburgh | 47629 | 79°F |
| Noblesville | 46060 | 79°F* |
| Richmond | 47374 | 79°F* |
| South Bend | 46601 | 77°F* |
| Terre Haute | 47801 | 79°F |
| Valparaiso | 46383 | 74°F* |
| Warsaw | 46580 | 76°F* |
| West Lafayette | 47906 | 77°F* |
Modeled estimate where no monitoring station is within 75 miles; all other readings are measured at USDA and NOAA stations.
Lawn Care Timing Guides for Indiana
- When to Overseed Your Lawn in Fall: The 60-70°F Soil Window
Fall is the best time to overseed a thin lawn.
- When to Aerate Your Lawn by Grass Type and Soil Temperature
Core aeration relieves compaction, but timing decides whether the lawn recovers in a week or struggles for a month.
- Lawn Fungus by Temperature: Brown Patch, Dollar Spot, Rust
Brown patch and Pythium strike when humid nights hold above 68°F on lush, over-fertilized turf; dollar spot, red thread, and rust hit slow-growing lawns at 60-85°F.
- Grass Seed Germination Soil Temperature: What Each Species Needs
Check whether your soil is warm enough for the seed you bought: cool-season grass seeds into 50-65°F soil (tall fescue prefers 60°F and up), warm-season into 75-85°F.
Soil Temperature FAQ for Indiana
What is the current soil temperature in Indiana?
The current average 2-inch soil temperature across Indiana is 79°F, from 1 USDA and NOAA monitoring station.
When should I apply pre-emergent in Indiana?
Apply pre-emergent herbicide when soil at 2 inches reaches 55°F for several consecutive days. Timing varies across Indiana, so check your city's page for station-specific readings and the pre-emergent timing recommendation.
When can I plant grass seed in Indiana?
Indiana spans USDA hardiness zones 5b to 7a, cool-season grass country. Cool-season grasses (fescue, bluegrass) can be seeded when soil holds between 50 and 65°F. Warm-season grasses (bermuda, zoysia) need soil above 65°F. Timing varies by location, so check your city's planting window for the dates specific to your area.