Last spring frost
Mar 26
Frost Dates for Hollister, OK
First fall frost
Nov 10
Growing season
229 days
Hardiness zone
8a
In an average year around Hollister, OK, the last spring frost (32°F) is about Mar 26 and the first fall frost is about Nov 10, giving roughly a 229-day growing season. To be safe most years, wait until Mar 8 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 24 | Apr 8 | Mar 22 |
| Freeze (32°F) | Apr 14 | Mar 26 | Mar 8 |
| Hard (28°F) | Apr 1 | Mar 11 | Feb 23 |
| Severe (24°F) | Mar 17 | Feb 28 | Feb 4 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 24 | Apr 19 | Apr 15 | Apr 11 | Apr 8 | Apr 5 | Apr 1 | Mar 28 | Mar 22 |
| 32°F | Apr 14 | Apr 7 | Apr 3 | Mar 31 | Mar 26 | Mar 22 | Mar 18 | Mar 13 | Mar 8 |
| 28°F | Apr 1 | Mar 25 | Mar 19 | Mar 15 | Mar 11 | Mar 8 | Mar 5 | Mar 1 | Feb 23 |
| 24°F | Mar 17 | Mar 11 | Mar 7 | Mar 3 | Feb 28 | Feb 25 | Feb 19 | Feb 13 | Feb 4 |
| 20°F | Mar 6 | Mar 1 | Feb 25 | Feb 19 | Feb 13 | Feb 8 | Feb 1 | Jan 24 | Jan 13 |
| 16°F | Feb 27 | Feb 17 | Feb 9 | Feb 2 | Jan 27 | Jan 21 | Jan 14 | Jan 4 | Dec 23 |
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 2 | Nov 15 |
| Freeze (32°F) | Oct 26 | Nov 10 | Nov 27 |
| Hard (28°F) | Nov 2 | Nov 21 | Dec 8 |
| Severe (24°F) | Nov 12 | Dec 2 | Dec 22 |
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 2 | Nov 4 | Nov 7 | Nov 11 | Nov 15 |
| 32°F | Oct 26 | Oct 31 | Nov 4 | Nov 7 | Nov 10 | Nov 13 | Nov 16 | Nov 20 | Nov 27 |
| 28°F | Nov 2 | Nov 9 | Nov 13 | Nov 17 | Nov 21 | Nov 25 | Nov 29 | Dec 2 | Dec 8 |
| 24°F | Nov 12 | Nov 20 | Nov 25 | Nov 29 | Dec 2 | Dec 6 | Dec 10 | Dec 15 | Dec 22 |
| 20°F | Nov 23 | Dec 1 | Dec 6 | Dec 11 | Dec 17 | Dec 22 | Dec 29 | Jan 4 | Jan 13 |
| 16°F | Dec 3 | Dec 10 | Dec 17 | Dec 23 | Dec 29 | Jan 4 | Jan 10 | Jan 21 | Feb 2 |
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: Altus Afb, Ok, about 6.6 miles away@if(!empty($station['elevation_ft'])), at 1,267 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 Hollister, OK?
On average, the last spring frost (32°F) around Hollister, OK is about Mar 26. In cooler years it can run later, so for a safer bet many gardeners wait until Mar 8.
When is the first frost in the fall?
The first fall frost around Hollister, OK typically arrives about Nov 10. 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 26 on average, or Mar 8 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 229 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 73551 Planting calendar → Oklahoma frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026