USDA Hardiness Zone 7b
Frost Dates for 72434 — Imboden, Arkansas
NOAA 1991–2020 normals from Pocahontas 1, AR (315 ft), 11 miles east.
Updated
In Imboden, 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 1, as early as October 21 one year in ten, leaving a typical freeze-free season of 214 days (NOAA, Pocahontas 1, AR).
- Last spring frost
- March 31
- First fall frost
- November 1
- Growing season
- 214 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
- Rare
- Last snow
- Rare
- Winters with snow
- 25%
- Snow per year
- 0.9"
median, 1991–2020
median, 1991–2020
6 of 24 observed
NOAA normal
Frost risk by date in Imboden
Half of springs at Pocahontas 1, AR see their last 32°F night by March 31; only one in ten is past it by March 12, and one in ten still has one after April 18. Planting tender crops after April 7 leaves a 30% risk of a frost on them, after April 11 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 105 Arkansas stations behind this site's ZIP pages.
In fall the first 32°F night comes by November 1 in half of years, as early as October 21 one year in ten, and holds off past November 17 one year in ten. A hard freeze of 28°F follows 11 days later, around November 12; in spring the one-in-ten date for 28°F is April 7, 11 days before the 32°F one. The freeze-free season lasts 214 days in a typical year, shorter than at 69% of the 105 Arkansas stations; it reaches 237 days one year in ten and falls short of 190 one year in ten. On average 82 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 23. Severe cold of 16°F or below comes in 98% of winters, usually between December 22 and February 11.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 25 | Mar 31 | Apr 5 | Apr 8 | Apr 12 | Apr 15 | Apr 19 | Apr 22 | Apr 29 |
| 32°F | Mar 12 | Mar 18 | Mar 23 | Mar 27 | Mar 31 | Apr 4 | Apr 7 | Apr 11 | Apr 18 |
| 28°F | Mar 1 | Mar 6 | Mar 11 | Mar 15 | Mar 18 | Mar 23 | Mar 28 | Apr 1 | Apr 7 |
| 24°F | Feb 16 | Feb 23 | Feb 28 | Mar 3 | Mar 6 | Mar 10 | Mar 15 | Mar 20 | Mar 28 |
| 20°F | Feb 1 | Feb 9 | Feb 16 | Feb 21 | Feb 26 | Mar 2 | Mar 5 | Mar 10 | Mar 17 |
| 16°F98% of yrs | Jan 16 | Jan 26 | Jan 31 | Feb 5 | Feb 11 | Feb 16 | Feb 23 | Mar 1 | Mar 7 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 10 | Oct 16 | Oct 18 | Oct 21 | Oct 23 | Oct 25 | Oct 27 | Oct 30 | Nov 3 |
| 32°F | Oct 21 | Oct 25 | Oct 27 | Oct 30 | Nov 1 | Nov 3 | Nov 7 | Nov 10 | Nov 17 |
| 28°F | Oct 30 | Nov 2 | Nov 5 | Nov 8 | Nov 12 | Nov 15 | Nov 20 | Nov 25 | Dec 2 |
| 24°F | Nov 6 | Nov 11 | Nov 16 | Nov 20 | Nov 25 | Nov 28 | Dec 1 | Dec 6 | Dec 14 |
| 20°F | Nov 14 | Nov 22 | Nov 29 | Dec 1 | Dec 5 | Dec 11 | Dec 16 | Dec 23 | Dec 30 |
| 16°F98% of yrs | Nov 28 | Dec 3 | Dec 10 | Dec 16 | Dec 22 | Dec 27 | Jan 1 | Jan 7 | Jan 18 |
Freeze probabilities 1991–2020 at Pocahontas 1, AR, 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 72434 →Compare Imboden with another place →
Weather by month in Imboden
July is the warmest month at Pocahontas 1, AR, averaging 90°F by day and 69°F at night; January is the coldest at 46°F and 26°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 48% of years.
Warmth for growing adds up to 4,579 growing degree days a year (base 50°F), fewer than at 80% of the 105 Arkansas stations. 38% of them (1,742) have built up by the end of June, and July adds the most, 916. Precipitation totals 51.6 inches a year, most in April (5.4") and least in June (3.5"); May to September bring 39% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 46 | 26 | 3.8 | 100% | 23 | 9 |
| Feb | 50 | 29 | 3.9 | 100% | 17 | 22 |
| Mar | 60 | 38 | 4.7 | 98% | 9 | 104 |
| Apr | 71 | 47 | 5.4 | 48% | 1 | 280 |
| May | 79 | 56 | 5.4 | 1% | 0 | 543 |
| Jun | 87 | 65 | 3.5 | 0% | 0 | 783 |
| Jul | 90 | 69 | 3.7 | 0% | 0 | 916 |
| Aug | 89 | 68 | 3.9 | 0% | 0 | 874 |
| Sep | 83 | 60 | 3.8 | 0% | 0 | 635 |
| Oct | 72 | 47 | 3.9 | 46% | 1 | 320 |
| Nov | 59 | 37 | 4.9 | 98% | 10 | 77 |
| Dec | 49 | 29 | 4.7 | 100% | 20 | 16 |
Monthly normals 1991–2020 at Pocahontas 1, AR (315 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, Hardy, AR, 20 miles west of Imboden, has a last frost 4 days later (April 4), a first frost 1 day earlier (October 31), a season 4 days shorter.
When it snows in Imboden, Arkansas
Measurable snow is rare here: only 6 of 24 winters from 1991 to 2020 recorded 0.1 inch or more at Black Rock, AR, 5.9 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 72434
| 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 9 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 18 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 1 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 72434 is 11 miles from Pocahontas 1, AR, which stands at 315 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 72455 (Pocahontas). The 2023 USDA Plant Hardiness Zone Map lists ZIP 72434 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.