Last spring frost
Apr 4
Frost Dates for Darmstadt, IN
First fall frost
Oct 29
Growing season
206 days
Hardiness zone
7a
In an average year around Darmstadt, IN, the last spring frost (32°F) is about Apr 4 and the first fall frost is about Oct 29, giving roughly a 206-day growing season. To be safe most years, wait until Mar 22 before setting out tender plants.
Last spring frost
Dates the last frost of spring typically ends. Plant tender crops after the risk has passed for your comfort level.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | May 2 | Apr 16 | Apr 3 |
| Freeze (32°F) | Apr 19 | Apr 4 | Mar 22 |
| Hard (28°F) | Apr 8 | Mar 25 | Mar 9 |
| Severe (24°F) | Mar 28 | Mar 13 | Feb 24 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 2 | Apr 27 | Apr 23 | Apr 19 | Apr 16 | Apr 13 | Apr 10 | Apr 7 | Apr 3 |
| 32°F | Apr 19 | Apr 14 | Apr 10 | Apr 7 | Apr 4 | Apr 1 | Mar 30 | Mar 27 | Mar 22 |
| 28°F | Apr 8 | Apr 3 | Mar 31 | Mar 28 | Mar 25 | Mar 23 | Mar 19 | Mar 15 | Mar 9 |
| 24°F | Mar 28 | Mar 23 | Mar 19 | Mar 16 | Mar 13 | Mar 9 | Mar 5 | Mar 1 | Feb 24 |
| 20°F | Mar 18 | Mar 14 | Mar 9 | Mar 6 | Mar 2 | Feb 28 | Feb 23 | Feb 17 | Feb 8 |
| 16°F | Mar 11 | Mar 5 | Mar 1 | Feb 25 | Feb 20 | Feb 13 | Feb 8 | Feb 3 | Jan 27 |
First fall frost
Dates the first frost of fall typically arrives. Count back by a crop's days-to-maturity to know your planting cutoff.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Oct 8 | Oct 21 | Oct 31 |
| Freeze (32°F) | Oct 17 | Oct 29 | Nov 11 |
| Hard (28°F) | Oct 26 | Nov 8 | Nov 26 |
| Severe (24°F) | Nov 4 | Nov 20 | Dec 8 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 8 | Oct 13 | Oct 16 | Oct 19 | Oct 21 | Oct 23 | Oct 25 | Oct 28 | Oct 31 |
| 32°F | Oct 17 | Oct 22 | Oct 24 | Oct 27 | Oct 29 | Oct 31 | Nov 2 | Nov 5 | Nov 11 |
| 28°F | Oct 26 | Nov 1 | Nov 2 | Nov 5 | Nov 8 | Nov 11 | Nov 15 | Nov 19 | Nov 26 |
| 24°F | Nov 4 | Nov 9 | Nov 13 | Nov 17 | Nov 20 | Nov 24 | Nov 29 | Dec 2 | Dec 8 |
| 20°F | Nov 14 | Nov 19 | Nov 24 | Nov 29 | Dec 2 | Dec 5 | Dec 9 | Dec 15 | Dec 23 |
| 16°F | Nov 24 | Dec 1 | Dec 6 | Dec 11 | Dec 15 | Dec 20 | Dec 25 | Dec 29 | Jan 6 |
Growing season is measured at 32°F with about 50% probability. Hardiness zone from the 2023 USDA map; frost normals from NOAA 1991-2020.
Where this data comes from
@endif These dates are computed from the nearest official weather station with long-term records: Evansville Regional Ap, In, about 6.7 miles away@if(!empty($station['elevation_ft'])), at 400 ft elevation. The further the station and the greater the elevation difference from your yard, the more your local frost timing can vary.
How we calculate these dates
Frost and freeze dates come from the NOAA 1991–2020 U.S. Climate Normals, the National Oceanic and Atmospheric Administration's 30-year averages for each weather station. A date shown at the 50% level is the median: in half of years the frost falls on or before it. The 10% and 90% columns show the early and late ends of the range, so you can plant on the odds you're comfortable with. These are long-term averages, not a forecast for this year - always check your local outlook before planting.
Source: NOAA National Centers for Environmental Information, 1991–2020 Climate Normals (public domain). Harman is not affiliated with or endorsed by NOAA.
Frequently asked questions
When is the last frost in Darmstadt, IN?
On average, the last spring frost (32°F) around Darmstadt, IN is about Apr 4. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 22.
When is the first frost in the fall?
The first fall frost around Darmstadt, IN typically arrives about Oct 29. Count back by a crop's days to maturity to find the latest date you can plant it.
When can I plant tomatoes and other tender crops?
Tender crops like tomatoes, peppers and basil are damaged by frost, so wait until the last spring frost has passed - around Apr 4 on average, or Mar 22 to be safe most years.
How long is the growing season here?
The frost-free growing season (between the last spring and first fall 32°F frost) is about 206 days in a typical year.
Are these dates a forecast for this year?
No. They are 30-year averages from the NOAA 1991–2020 Climate Normals, not a prediction for the current year. Use them for planning and always check your local weather forecast before planting or protecting crops.
Local weather for 47720 Planting calendar → Indiana frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026