Last spring frost
Apr 30
Frost Dates for Jennings, KS
First fall frost
Oct 11
Growing season
163 days
Hardiness zone
6a
In an average year around Jennings, KS, the last spring frost (32°F) is about Apr 30 and the first fall frost is about Oct 11, giving roughly a 163-day growing season. To be safe most years, wait until Apr 16 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 24 | May 10 | Apr 27 |
| Freeze (32°F) | May 14 | Apr 30 | Apr 16 |
| Hard (28°F) | May 4 | Apr 19 | Apr 4 |
| Severe (24°F) | Apr 22 | Apr 6 | Mar 22 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 24 | May 19 | May 15 | May 12 | May 10 | May 7 | May 4 | May 1 | Apr 27 |
| 32°F | May 14 | May 9 | May 5 | May 2 | Apr 30 | Apr 28 | Apr 25 | Apr 21 | Apr 16 |
| 28°F | May 4 | Apr 30 | Apr 26 | Apr 22 | Apr 19 | Apr 15 | Apr 12 | Apr 8 | Apr 4 |
| 24°F | Apr 22 | Apr 18 | Apr 13 | Apr 10 | Apr 6 | Apr 4 | Apr 1 | Mar 29 | Mar 22 |
| 20°F | Apr 15 | Apr 8 | Apr 4 | Apr 2 | Mar 31 | Mar 26 | Mar 22 | Mar 16 | Mar 10 |
| 16°F | Apr 6 | Apr 1 | Mar 27 | Mar 22 | Mar 17 | Mar 12 | Mar 9 | Mar 5 | Feb 28 |
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) | Sep 18 | Oct 2 | Oct 14 |
| Freeze (32°F) | Sep 27 | Oct 11 | Oct 23 |
| Hard (28°F) | Oct 7 | Oct 20 | Oct 31 |
| Severe (24°F) | Oct 17 | Oct 29 | Nov 12 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 18 | Sep 25 | Sep 28 | Oct 1 | Oct 2 | Oct 5 | Oct 7 | Oct 10 | Oct 14 |
| 32°F | Sep 27 | Oct 2 | Oct 5 | Oct 8 | Oct 11 | Oct 14 | Oct 16 | Oct 19 | Oct 23 |
| 28°F | Oct 7 | Oct 12 | Oct 15 | Oct 18 | Oct 20 | Oct 22 | Oct 25 | Oct 27 | Oct 31 |
| 24°F | Oct 17 | Oct 21 | Oct 24 | Oct 27 | Oct 29 | Nov 1 | Nov 3 | Nov 6 | Nov 12 |
| 20°F | Oct 23 | Oct 30 | Nov 1 | Nov 3 | Nov 6 | Nov 9 | Nov 13 | Nov 16 | Nov 22 |
| 16°F | Oct 31 | Nov 4 | Nov 8 | Nov 12 | Nov 15 | Nov 19 | Nov 22 | Nov 26 | Dec 1 |
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: Oberlin, Ks, about 17.3 miles away@if(!empty($station['elevation_ft'])), at 2,586 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 Jennings, KS?
On average, the last spring frost (32°F) around Jennings, KS is about Apr 30. In cooler years it can run later, so for a safer bet many gardeners wait until Apr 16.
When is the first frost in the fall?
The first fall frost around Jennings, KS typically arrives about Oct 11. 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 30 on average, or Apr 16 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 163 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 67643 Planting calendar → Kansas frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026