USDA Hardiness Zone 8a
Frost Dates for 73460 — Tishomingo, Oklahoma
NOAA 1991–2020 normals from Tishomingo 6N Mesonet, OK (879 ft), 6 miles north.
Updated
In Tishomingo, the last spring frost (32°F) is around March 29 in half of years and has passed by April 16 in nine years out of ten. The first fall frost comes around November 5, as early as October 21 one year in ten, leaving a typical freeze-free season of 222 days (NOAA, Tishomingo 6N Mesonet, OK).
- Last spring frost
- March 29
- First fall frost
- November 5
- Growing season
- 222 days
- Hardiness zone
- 8a
50% probability
50% probability
freeze-free, 50%
10 to 15°F (-12.2 to -9.4°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 30%
- Snow per year
- 2"
median, 1991–2020
median, 1991–2020
6 of 20 observed
NOAA normal
Frost risk by date in Tishomingo
Half of springs at Tishomingo 6N Mesonet, OK see their last 32°F night by March 29; only one in ten is past it by March 9, and one in ten still has one after April 16. Planting tender crops after April 4 leaves a 30% risk of a frost on them, after April 8 20%, and after April 16 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 5 in half of years, as early as October 21 one year in ten, and holds off past November 21 one year in ten. A hard freeze of 28°F follows 9 days later, around November 14; in spring the one-in-ten date for 28°F is April 3, 13 days before the 32°F one. The freeze-free season lasts 222 days in a typical year, longer than at 83% of the 114 Oklahoma stations; it reaches 248 days one year in ten and falls short of 197 one year in ten. On average 68 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 8, and return around October 27. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 85%.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 23 | Mar 29 | Apr 3 | Apr 6 | Apr 8 | Apr 12 | Apr 16 | Apr 20 | Apr 26 |
| 32°F | Mar 9 | Mar 15 | Mar 20 | Mar 24 | Mar 29 | Apr 1 | Apr 4 | Apr 8 | Apr 16 |
| 28°F | Feb 24 | Feb 28 | Mar 5 | Mar 9 | Mar 13 | Mar 17 | Mar 22 | Mar 28 | Apr 3 |
| 24°F | Feb 6 | Feb 15 | Feb 22 | Feb 27 | Mar 1 | Mar 5 | Mar 8 | Mar 13 | Mar 19 |
| 20°F99% of yrs | Jan 17 | Jan 28 | Feb 3 | Feb 9 | Feb 17 | Feb 23 | Feb 28 | Mar 3 | Mar 9 |
| 16°F85% of yrs | Dec 27 | Jan 6 | Jan 16 | Jan 24 | Jan 30 | Feb 4 | Feb 12 | Feb 21 | Mar 1 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 15 | Oct 19 | Oct 21 | Oct 24 | Oct 27 | Oct 30 | Nov 1 | Nov 5 | Nov 10 |
| 32°F | Oct 21 | Oct 26 | Oct 30 | Nov 2 | Nov 5 | Nov 8 | Nov 12 | Nov 15 | Nov 21 |
| 28°F | Oct 29 | Nov 4 | Nov 7 | Nov 11 | Nov 14 | Nov 18 | Nov 23 | Nov 28 | Dec 3 |
| 24°F | Nov 7 | Nov 13 | Nov 18 | Nov 24 | Nov 28 | Dec 1 | Dec 4 | Dec 8 | Dec 15 |
| 20°F99% of yrs | Nov 19 | Nov 27 | Dec 1 | Dec 6 | Dec 11 | Dec 17 | Dec 23 | Dec 30 | Jan 8 |
| 16°F85% of yrs | Dec 2 | Dec 8 | Dec 15 | Dec 22 | Dec 27 | Jan 2 | Jan 7 | Jan 16 | Jan 30 |
Freeze probabilities 1991–2020 at Tishomingo 6N 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 73460 →Compare Tishomingo with another place →
Weather by month in Tishomingo
July is the warmest month at Tishomingo 6N Mesonet, OK, averaging 93°F by day and 71°F at night; January is the coldest at 52°F and 30°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 43% of years.
Warmth for growing adds up to 5,322 growing degree days a year (base 50°F), more than at 75% of the 114 Oklahoma stations. 38% of them (2,037) have built up by the end of June, and July adds the most, 987.
| Month | High °F | Low °F | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|
| Jan | 52 | 30 | 100% | 21 | 23 |
| Feb | 56 | 34 | 100% | 13 | 66 |
| Mar | 65 | 42 | 94% | 6 | 181 |
| Apr | 72 | 50 | 43% | 1 | 338 |
| May | 79 | 59 | 0% | 0 | 591 |
| Jun | 88 | 68 | 0% | 0 | 840 |
| Jul | 93 | 71 | 0% | 0 | 987 |
| Aug | 94 | 70 | 0% | 0 | 984 |
| Sep | 86 | 63 | 0% | 0 | 733 |
| Oct | 75 | 51 | 33% | 1 | 406 |
| Nov | 64 | 40 | 97% | 9 | 141 |
| Dec | 54 | 32 | 100% | 18 | 34 |
Monthly normals 1991–2020 at Tishomingo 6N Mesonet, OK (879 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, Madill, OK, 12 miles southwest of Tishomingo, has a last frost 2 days earlier (March 27), a first frost 3 days later (November 8), a season 5 days longer.
When it snows in Tishomingo, Oklahoma
Measurable snow is rare here: only 6 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Tishomingo Natl Wr, OK, 3.9 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 73460
| When | What to do |
|---|---|
| January 18 – February 1 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| February 1 – February 15 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| March 1 – March 15 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| March 29 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 13 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 22 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 5 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 73460 is 6 miles from Tishomingo 6N Mesonet, OK, which stands at 879 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 73460 in zone 8a, the band where the coldest night of the year averaged 10 to 15°F (-12.2 to -9.4°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.