Last spring frost
Mar 12
Frost Dates for Winchester, AR
First fall frost
Nov 14
Growing season
245 days
Hardiness zone
8b
In an average year around Winchester, AR, the last spring frost (32°F) is about Mar 12 and the first fall frost is about Nov 14, giving roughly a 245-day growing season. To be safe most years, wait until Feb 24 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) | Apr 10 | Mar 25 | Mar 8 |
| Freeze (32°F) | Mar 29 | Mar 12 | Feb 24 |
| Hard (28°F) | Mar 19 | Mar 2 | Feb 3 |
| Severe (24°F) | Mar 10 | Feb 15 | Jan 13 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 10 | Apr 4 | Mar 31 | Mar 28 | Mar 25 | Mar 23 | Mar 19 | Mar 13 | Mar 8 |
| 32°F | Mar 29 | Mar 25 | Mar 20 | Mar 16 | Mar 12 | Mar 9 | Mar 5 | Mar 1 | Feb 24 |
| 28°F | Mar 19 | Mar 13 | Mar 9 | Mar 5 | Mar 2 | Feb 27 | Feb 23 | Feb 15 | Feb 3 |
| 24°F | Mar 10 | Mar 4 | Feb 28 | Feb 23 | Feb 15 | Feb 6 | Jan 31 | Jan 25 | Jan 13 |
| 20°F | Feb 28 | Feb 18 | Feb 8 | Feb 1 | Jan 29 | Jan 23 | Jan 16 | Jan 8 | Dec 31 |
| 16°F | Feb 18 | Feb 8 | Feb 1 | Jan 27 | Jan 20 | Jan 16 | Jan 11 | Jan 6 | Dec 31 |
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 20 | Nov 3 | Nov 18 |
| Freeze (32°F) | Oct 30 | Nov 14 | Dec 2 |
| Hard (28°F) | Nov 8 | Nov 27 | Dec 20 |
| Severe (24°F) | Nov 21 | Dec 19 | Jan 20 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 20 | Oct 24 | Oct 28 | Oct 31 | Nov 3 | Nov 6 | Nov 8 | Nov 12 | Nov 18 |
| 32°F | Oct 30 | Nov 4 | Nov 8 | Nov 11 | Nov 14 | Nov 19 | Nov 22 | Nov 26 | Dec 2 |
| 28°F | Nov 8 | Nov 14 | Nov 18 | Nov 23 | Nov 27 | Dec 1 | Dec 5 | Dec 11 | Dec 20 |
| 24°F | Nov 21 | Nov 29 | Dec 5 | Dec 11 | Dec 19 | Dec 25 | Jan 1 | Jan 7 | Jan 20 |
| 20°F | Dec 9 | Dec 21 | Dec 27 | Jan 1 | Jan 4 | Jan 9 | Jan 15 | Jan 24 | Feb 3 |
| 16°F | Dec 20 | Dec 30 | Jan 2 | Jan 6 | Jan 12 | Jan 16 | Jan 21 | Jan 31 | Feb 7 |
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: Dumas, Ar, about 9.1 miles away@if(!empty($station['elevation_ft'])), at 163 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 Winchester, AR?
On average, the last spring frost (32°F) around Winchester, AR is about Mar 12. In cooler years it can run later, so for a safer bet many gardeners wait until Feb 24.
When is the first frost in the fall?
The first fall frost around Winchester, AR typically arrives about Nov 14. 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 Mar 12 on average, or Feb 24 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 245 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 71677 Planting calendar → Arkansas frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026