USDA Hardiness Zone 7a
Frost Dates for 67031 — Conway Springs, Kansas
NOAA 1991–2020 normals from Norwich, KS (1,501 ft), 11 miles west.
Updated
In Conway Springs, the last spring frost (32°F) is around April 12 in half of years and has passed by April 25 in nine years out of ten. The first fall frost comes around October 29, as early as October 16 one year in ten, leaving a typical freeze-free season of 201 days (NOAA, Norwich, KS).
- Last spring frost
- April 12
- First fall frost
- October 29
- Growing season
- 201 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 11
- Last snow
- February 13
- Winters with snow
- 88%
- Snow per year
- 6.6"
median, 1991–2020
median, 1991–2020
22 of 25 observed
NOAA normal
Frost risk by date in Conway Springs
Half of springs at Norwich, KS see their last 32°F night by April 12; only one in ten is past it by March 28, and one in ten still has one after April 25. Planting tender crops after April 18 leaves a 30% risk of a frost on them, after April 22 20%, and after April 25 10%. The 13 days between the even-odds date and the one-in-ten date is narrower than at 65% of the 110 Kansas stations behind this site's ZIP pages.
In fall the first 32°F night comes by October 29 in half of years, as early as October 16 one year in ten, and holds off past November 11 one year in ten. A hard freeze of 28°F follows 9 days later, around November 7; in spring the one-in-ten date for 28°F is April 18, 7 days before the 32°F one. The freeze-free season lasts 201 days in a typical year, longer than at 87% of the 110 Kansas stations; it reaches 220 days one year in ten and falls short of 181 one year in ten. On average 101 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 9 days longer, to about April 21, and return around October 20. Severe cold of 16°F or below comes every winter, usually between December 3 and March 1.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 8 | Apr 13 | Apr 16 | Apr 18 | Apr 21 | Apr 24 | Apr 27 | Apr 30 | May 2 |
| 32°F | Mar 28 | Apr 1 | Apr 6 | Apr 9 | Apr 12 | Apr 15 | Apr 18 | Apr 22 | Apr 25 |
| 28°F | Mar 16 | Mar 22 | Mar 27 | Mar 30 | Apr 2 | Apr 5 | Apr 8 | Apr 12 | Apr 18 |
| 24°F | Mar 5 | Mar 11 | Mar 16 | Mar 20 | Mar 23 | Mar 27 | Mar 30 | Apr 2 | Apr 7 |
| 20°F | Feb 23 | Mar 1 | Mar 4 | Mar 8 | Mar 12 | Mar 16 | Mar 19 | Mar 24 | Mar 30 |
| 16°F | Feb 7 | Feb 17 | Feb 22 | Feb 27 | Mar 1 | Mar 5 | Mar 9 | Mar 13 | Mar 19 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 4 | Oct 10 | Oct 15 | Oct 17 | Oct 20 | Oct 22 | Oct 25 | Oct 29 | Nov 3 |
| 32°F | Oct 16 | Oct 21 | Oct 24 | Oct 27 | Oct 29 | Nov 1 | Nov 3 | Nov 7 | Nov 11 |
| 28°F | Oct 24 | Oct 30 | Nov 1 | Nov 4 | Nov 7 | Nov 9 | Nov 12 | Nov 15 | Nov 20 |
| 24°F | Oct 31 | Nov 4 | Nov 8 | Nov 11 | Nov 14 | Nov 17 | Nov 20 | Nov 24 | Nov 30 |
| 20°F | Nov 7 | Nov 13 | Nov 17 | Nov 20 | Nov 23 | Nov 26 | Nov 29 | Dec 3 | Dec 9 |
| 16°F | Nov 17 | Nov 21 | Nov 26 | Nov 29 | Dec 3 | Dec 7 | Dec 11 | Dec 16 | Dec 23 |
Freeze probabilities 1991–2020 at Norwich, 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 67031 →Compare Conway Springs with another place →
Weather by month in Conway Springs
July is the warmest month at Norwich, KS, averaging 93°F by day and 69°F at night; January is the coldest at 44°F and 21°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 82% of years.
Warmth for growing adds up to 4,430 growing degree days a year (base 50°F), more than at 86% of the 110 Kansas stations. 36% of them (1,580) have built up by the end of June, and July adds the most, 945. Precipitation totals 33.2 inches a year, most in May (5.1") 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 | 21 | 1.1 | 100% | 27 | 2 |
| Feb | 49 | 25 | 1.5 | 100% | 21 | 15 |
| Mar | 59 | 33 | 2.3 | 100% | 13 | 79 |
| Apr | 68 | 43 | 3.2 | 82% | 3 | 210 |
| May | 78 | 54 | 5.1 | 2% | 0 | 496 |
| Jun | 88 | 64 | 4.6 | 0% | 0 | 778 |
| Jul | 93 | 69 | 3.9 | 0% | 0 | 945 |
| Aug | 91 | 67 | 3.4 | 0% | 0 | 899 |
| Sep | 84 | 59 | 2.4 | 0% | 0 | 638 |
| Oct | 71 | 46 | 3.1 | 57% | 1 | 301 |
| Nov | 57 | 33 | 1.5 | 100% | 12 | 61 |
| Dec | 45 | 24 | 1.1 | 100% | 25 | 6 |
Monthly normals 1991–2020 at Norwich, KS (1,501 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, Wellington, KS, 16 miles southeast of Conway Springs and 277 feet lower, has a last frost 3 days later (April 15), the same first-frost date, a season 6 days shorter.
When it snows in Conway Springs, Kansas
The first measurable snow (0.1 inch or more) in Conway Springs usually arrives around December 11, and the last of the season around February 13. Those are the middle dates across the winters of 1991–2020 at Norwich, KS, 11.3 miles away: half of years saw snow earlier, half later. Snow fell in 88% of those winters. The last 32°F night of spring typically comes 58 days after the last snow.
Planting calendar for 67031
| When | What to do |
|---|---|
| February 1 – February 15 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| February 15 – March 1 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| March 15 – March 29 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| April 12 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 6 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 15 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| October 29 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 67031 is 11 miles from Norwich, KS, which stands at 1,501 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station; its figures are presented in full for 67025 (Cheney). The 2023 USDA Plant Hardiness Zone Map lists ZIP 67031 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.