USDA Hardiness Zone 7a
Frost Dates for 67156 — Winfield, Kansas
NOAA 1991–2020 normals from Winfield 3NE, KS (1,233 ft), 3 miles northeast.
Updated
In Winfield, the last spring frost (32°F) is around April 16 in half of years and has passed by May 1 in nine years out of ten. The first fall frost comes around October 22, as early as October 7 one year in ten, leaving a typical freeze-free season of 189 days (NOAA, Winfield 3NE, KS).
- Last spring frost
- April 16
- First fall frost
- October 22
- Growing season
- 189 days
- Hardiness zone
- 7a
50% probability
50% probability
freeze-free, 50%
0 to 5°F (-17.8 to -15.0°C) coldest night
- First snow
- December 15
- Last snow
- March 4
- Winters with snow
- 92%
- Snow per year
- 9"
median, 1991–2020
median, 1991–2020
22 of 24 observed
NOAA normal
Frost risk by date in Winfield
Half of springs at Winfield 3NE, KS see their last 32°F night by April 16; only one in ten is past it by March 31, and one in ten still has one after May 1. Planting tender crops after April 23 leaves a 30% risk of a frost on them, after April 27 20%, and after May 1 10%. The 15 days between the even-odds date and the one-in-ten date is wider than at 57% of the 110 Kansas stations behind this site's ZIP pages.
In fall the first 32°F night comes by October 22 in half of years, as early as October 7 one year in ten, and holds off past November 3 one year in ten. A hard freeze of 28°F follows 10 days later, around November 1; in spring the one-in-ten date for 28°F is April 22, 9 days before the 32°F one. The freeze-free season lasts 189 days in a typical year, longer than at 53% of the 110 Kansas stations; it reaches 210 days one year in ten and falls short of 167 one year in ten. On average 108 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 10 days longer, to about April 26, and return around October 13. Severe cold of 16°F or below comes every winter, usually between November 28 and March 3.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 9 | Apr 15 | Apr 20 | Apr 23 | Apr 26 | Apr 29 | May 1 | May 4 | May 8 |
| 32°F | Mar 31 | Apr 3 | Apr 8 | Apr 12 | Apr 16 | Apr 20 | Apr 23 | Apr 27 | May 1 |
| 28°F | Mar 17 | Mar 25 | Mar 29 | Apr 1 | Apr 3 | Apr 7 | Apr 11 | Apr 15 | Apr 22 |
| 24°F | Mar 6 | Mar 12 | Mar 16 | Mar 21 | Mar 25 | Mar 29 | Apr 1 | Apr 4 | Apr 10 |
| 20°F | Feb 25 | Mar 2 | Mar 6 | Mar 9 | Mar 13 | Mar 16 | Mar 21 | Mar 27 | Apr 1 |
| 16°F | Feb 15 | Feb 20 | Feb 25 | Feb 28 | Mar 3 | Mar 6 | Mar 10 | Mar 14 | Mar 20 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 29 | Oct 3 | Oct 6 | Oct 10 | Oct 13 | Oct 16 | Oct 18 | Oct 21 | Oct 25 |
| 32°F | Oct 7 | Oct 13 | Oct 17 | Oct 19 | Oct 22 | Oct 25 | Oct 27 | Oct 30 | Nov 3 |
| 28°F | Oct 19 | Oct 23 | Oct 27 | Oct 29 | Nov 1 | Nov 2 | Nov 5 | Nov 9 | Nov 15 |
| 24°F | Oct 26 | Oct 30 | Nov 2 | Nov 5 | Nov 8 | Nov 11 | Nov 16 | Nov 20 | Nov 26 |
| 20°F | Nov 1 | Nov 6 | Nov 10 | Nov 14 | Nov 18 | Nov 21 | Nov 25 | Nov 30 | Dec 5 |
| 16°F | Nov 9 | Nov 15 | Nov 20 | Nov 24 | Nov 28 | Dec 2 | Dec 5 | Dec 11 | Dec 16 |
Freeze probabilities 1991–2020 at Winfield 3NE, KS, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.
Frost risk on any date in 67156 →Compare Winfield with another place →
Frost risk through the year in Winfield
In Winfield, the spring curve drops under 10% on May 1 and the fall curve passes 10% on October 7, 159 days later; that gap is shorter than at 48% of the 110 Kansas stations with frost dates. The spring risk falls from 90% to 10% over 31 days (March 31 to May 1) and the fall risk climbs from 10% to 90% over 27 days (October 7 to November 3): both ends of the season vary about as much. At Winfield Strother Field Airport, KS, 7 miles southwest, the same gap runs from April 28 to October 12, 8 days longer.
| Planted on | Another 32°F night | 28°F night |
|---|---|---|
| Apr 2 | 83% | 55% |
| Apr 9 | 68% | 35% |
| Apr 1650% date | 50% | 19% |
| Apr 23 | 30% | under 10% |
| Apr 30 | 13% | under 10% |
| May 7 | under 10% | under 10% |
Weather by month in Winfield
July is the warmest month at Winfield 3NE, KS, averaging 91°F by day and 68°F at night; January is the coldest at 44°F and 20°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From June to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 86% of years and May still brings one in 12% of years.
Warmth for growing adds up to 4,270 growing degree days a year (base 50°F), more than at 70% of the 110 Kansas stations. 36% of them (1,528) have built up by the end of June, and July adds the most, 919. Precipitation totals 40.7 inches a year, most in May (6.0") and least in January (1.1"); May to September bring 58% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 44 | 20 | 1.1 | 100% | 28 | 4 |
| Feb | 49 | 24 | 1.5 | 100% | 22 | 15 |
| Mar | 59 | 33 | 2.9 | 100% | 14 | 81 |
| Apr | 68 | 43 | 4.1 | 86% | 4 | 216 |
| May | 77 | 54 | 6.0 | 12% | <1 | 474 |
| Jun | 86 | 64 | 5.7 | 0% | 0 | 738 |
| Jul | 91 | 68 | 4.3 | 0% | 0 | 919 |
| Aug | 90 | 66 | 4.5 | 0% | 0 | 871 |
| Sep | 82 | 58 | 3.1 | 3% | <1 | 601 |
| Oct | 71 | 45 | 3.7 | 82% | 3 | 279 |
| Nov | 58 | 33 | 2.1 | 100% | 14 | 66 |
| Dec | 46 | 23 | 1.7 | 100% | 25 | 7 |
Monthly normals 1991–2020 at Winfield 3NE, KS (1,233 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.
Compared with the next station
The nearest other station, Winfield Strother Field Airport, KS, 7 miles southwest of Winfield, has a last frost 5 days earlier (April 11), a first frost 5 days later (October 27), a season 8 days longer.
When it snows in Winfield, Kansas
The first measurable snow (0.1 inch or more) in Winfield usually arrives around December 15, and the last of the season around March 4. Those are the middle dates across the winters of 1991–2020 at Winfield 3NE, KS, 3 miles away: half of years saw snow earlier, half later. Snow fell in 92% of those winters. The last 32°F night of spring typically comes 43 days after the last snow.
Planting calendar for 67156
| When | What to do |
|---|---|
| February 5 – February 19 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| February 19 – March 5 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| March 19 – April 2 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| April 16 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by July 30 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 8 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| October 22 onward | Plant garlic, mulch beds, lift tender bulbsGarlic wants a cold spell; bare soil loses structure over winter. |
The weeks before and after the 50% dates are general rules of thumb, not NOAA figures; a seed packet gives the timing for each variety.
Where these figures come from
ZIP 67156 is 3 miles from Winfield 3NE, KS, which stands at 1,233 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 67156 in zone 7a, the band where the coldest night of the year averaged 0 to 5°F (-17.8 to -15.0°C) over 1991–2020; a zone describes winter lows, not frost dates.
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.