Last spring frost
Apr 8
Frost Dates for Norman, AR
First fall frost
Oct 26
Growing season
201 days
Hardiness zone
8a
In an average year around Norman, AR, the last spring frost (32°F) is about Apr 8 and the first fall frost is about Oct 26, giving roughly a 201-day growing season. To be safe most years, wait until Mar 18 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 5 | Apr 19 | Mar 31 |
| Freeze (32°F) | Apr 26 | Apr 8 | Mar 18 |
| Hard (28°F) | Apr 14 | Mar 26 | Mar 3 |
| Severe (24°F) | Apr 4 | Mar 9 | Feb 19 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 5 | Apr 30 | Apr 26 | Apr 23 | Apr 19 | Apr 16 | Apr 12 | Apr 8 | Mar 31 |
| 32°F | Apr 26 | Apr 21 | Apr 16 | Apr 12 | Apr 8 | Apr 4 | Mar 31 | Mar 26 | Mar 18 |
| 28°F | Apr 14 | Apr 8 | Apr 3 | Mar 31 | Mar 26 | Mar 21 | Mar 16 | Mar 10 | Mar 3 |
| 24°F | Apr 4 | Mar 26 | Mar 20 | Mar 14 | Mar 9 | Mar 6 | Mar 1 | Feb 26 | Feb 19 |
| 20°F | Mar 18 | Mar 10 | Mar 4 | Feb 28 | Feb 25 | Feb 20 | Feb 15 | Feb 9 | Jan 31 |
| 16°F | Mar 5 | Feb 27 | Feb 19 | Feb 12 | Feb 7 | Feb 2 | Jan 28 | Jan 20 | Jan 7 |
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 3 | Oct 17 | Nov 1 |
| Freeze (32°F) | Oct 12 | Oct 26 | Nov 12 |
| Hard (28°F) | Oct 20 | Nov 5 | Nov 25 |
| Severe (24°F) | Nov 1 | Nov 19 | Dec 9 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 3 | Oct 7 | Oct 10 | Oct 14 | Oct 17 | Oct 20 | Oct 23 | Oct 27 | Nov 1 |
| 32°F | Oct 12 | Oct 17 | Oct 21 | Oct 24 | Oct 26 | Oct 29 | Nov 1 | Nov 4 | Nov 12 |
| 28°F | Oct 20 | Oct 24 | Oct 30 | Nov 2 | Nov 5 | Nov 8 | Nov 13 | Nov 18 | Nov 25 |
| 24°F | Nov 1 | Nov 5 | Nov 10 | Nov 14 | Nov 19 | Nov 23 | Nov 29 | Dec 3 | Dec 9 |
| 20°F | Nov 9 | Nov 16 | Nov 22 | Nov 27 | Dec 1 | Dec 5 | Dec 11 | Dec 19 | Dec 26 |
| 16°F | Nov 19 | Nov 29 | Dec 5 | Dec 11 | Dec 19 | Dec 24 | Dec 30 | Jan 5 | Jan 17 |
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: Mt Ida 3 Se, Ar, about 7.6 miles away@if(!empty($station['elevation_ft'])), at 697 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 Norman, AR?
On average, the last spring frost (32°F) around Norman, AR is about Apr 8. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 18.
When is the first frost in the fall?
The first fall frost around Norman, AR typically arrives about Oct 26. 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 8 on average, or Mar 18 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 201 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 71960 Planting calendar → Arkansas frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026