USDA Hardiness Zone 7b
Frost Dates for 74849 — Konawa, Oklahoma
NOAA 1991–2020 normals from Ada 2NNE Mesonet, OK (967 ft), 13 miles south.
Updated
In Konawa, the last spring frost (32°F) is around March 31 in half of years and has passed by April 18 in nine years out of ten. The first fall frost comes around November 3, as early as October 19 one year in ten, leaving a typical freeze-free season of 216 days (NOAA, Ada 2NNE Mesonet, OK).
- Last spring frost
- March 31
- First fall frost
- November 3
- Growing season
- 216 days
- Hardiness zone
- 7b
50% probability
50% probability
freeze-free, 50%
5 to 10°F (-15.0 to -12.2°C) coldest night
- First snow
- December 31
- Last snow
- January 11
- Winters with snow
- 60%
- Snow per year
- 2.8"
median, 1991–2020
median, 1991–2020
12 of 20 observed
NOAA normal
Frost risk by date in Konawa
Half of springs at Ada 2NNE Mesonet, OK see their last 32°F night by March 31; only one in ten is past it by March 10, and one in ten still has one after April 18. Planting tender crops after April 6 leaves a 30% risk of a frost on them, after April 10 20%, and after April 18 10%. The 18 days between the even-odds date and the one-in-ten date is wider than at 60% of the 114 Oklahoma stations behind this site's ZIP pages.
In fall the first 32°F night comes by November 3 in half of years, as early as October 19 one year in ten, and holds off past November 19 one year in ten. A hard freeze of 28°F follows 9 days later, around November 12; in spring the one-in-ten date for 28°F is April 3, 15 days before the 32°F one. The freeze-free season lasts 216 days in a typical year, longer than at 65% of the 114 Oklahoma stations; it reaches 242 days one year in ten and falls short of 192 one year in ten. On average 71 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 12 days longer, to about April 12, and return around October 25. Severe cold of 16°F or below comes in 91% of winters, usually between December 23 and February 4.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 25 | Apr 1 | Apr 5 | Apr 8 | Apr 12 | Apr 16 | Apr 19 | Apr 23 | Apr 29 |
| 32°F | Mar 10 | Mar 16 | Mar 21 | Mar 26 | Mar 31 | Apr 3 | Apr 6 | Apr 10 | Apr 18 |
| 28°F | Feb 26 | Mar 3 | Mar 6 | Mar 10 | Mar 14 | Mar 17 | Mar 23 | Mar 29 | Apr 3 |
| 24°F | Feb 11 | Feb 20 | Feb 25 | Feb 28 | Mar 3 | Mar 6 | Mar 10 | Mar 14 | Mar 20 |
| 20°F | Jan 26 | Feb 1 | Feb 8 | Feb 14 | Feb 20 | Feb 25 | Mar 1 | Mar 5 | Mar 10 |
| 16°F91% of yrs | Jan 2 | Jan 15 | Jan 24 | Jan 30 | Feb 4 | Feb 10 | Feb 17 | Feb 24 | Mar 3 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 10 | Oct 16 | Oct 20 | Oct 22 | Oct 25 | Oct 28 | Nov 1 | Nov 3 | Nov 8 |
| 32°F | Oct 19 | Oct 24 | Oct 28 | Nov 1 | Nov 3 | Nov 5 | Nov 9 | Nov 13 | Nov 19 |
| 28°F | Oct 25 | Nov 1 | Nov 4 | Nov 8 | Nov 12 | Nov 16 | Nov 21 | Nov 26 | Dec 2 |
| 24°F | Nov 3 | Nov 9 | Nov 14 | Nov 20 | Nov 25 | Nov 29 | Dec 3 | Dec 7 | Dec 15 |
| 20°F | Nov 13 | Nov 22 | Nov 28 | Dec 2 | Dec 7 | Dec 12 | Dec 18 | Dec 25 | Jan 3 |
| 16°F91% of yrs | Nov 27 | Dec 4 | Dec 10 | Dec 16 | Dec 23 | Dec 29 | Jan 4 | Jan 13 | Jan 27 |
Freeze probabilities 1991–2020 at Ada 2NNE Mesonet, OK, 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 74849 →Compare Konawa with another place →
Weather by month in Konawa
July is the warmest month at Ada 2NNE Mesonet, OK, averaging 93°F by day and 72°F at night; January is the coldest at 52°F and 29°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 46% of years.
Warmth for growing adds up to 5,248 growing degree days a year (base 50°F), more than at 68% of the 114 Oklahoma stations. 38% of them (2,001) have built up by the end of June, and July adds the most, 996.
| Month | High °F | Low °F | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|
| Jan | 52 | 29 | 100% | 20 | 27 |
| Feb | 56 | 33 | 100% | 15 | 60 |
| Mar | 64 | 42 | 95% | 7 | 176 |
| Apr | 72 | 49 | 46% | 2 | 334 |
| May | 79 | 59 | 1% | 0 | 579 |
| Jun | 88 | 68 | 0% | 0 | 826 |
| Jul | 93 | 72 | 0% | 0 | 996 |
| Aug | 93 | 70 | 0% | 0 | 974 |
| Sep | 86 | 62 | 0% | 0 | 711 |
| Oct | 75 | 50 | 40% | 1 | 395 |
| Nov | 63 | 39 | 98% | 8 | 136 |
| Dec | 53 | 31 | 100% | 18 | 34 |
Monthly normals 1991–2020 at Ada 2NNE Mesonet, OK (967 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, Ada, OK, 13 miles south of Konawa, has a last frost 2 days later (April 2), a first frost 1 day later (November 4), a season 1 day longer.
When it snows in Konawa, Oklahoma
The first measurable snow (0.1 inch or more) in Konawa usually arrives around December 31, and the last of the season around January 11. Those are the middle dates across the winters of 1991–2020 at Konawa, OK, 0.9 miles away: half of years saw snow earlier, half later. Snow fell in 60% of those winters. The last 32°F night of spring typically comes 79 days after the last snow.
Planting calendar for 74849
| When | What to do |
|---|---|
| January 20 – February 3 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| February 3 – February 17 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| March 3 – March 17 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| March 31 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 11 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 20 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 3 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 74849 is 13 miles from Ada 2NNE Mesonet, OK, which stands at 967 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 74849 in zone 7b, the band where the coldest night of the year averaged 5 to 10°F (-15.0 to -12.2°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.