USDA Hardiness Zone 8b
Frost Dates for 71640 — Eudora, Arkansas
NOAA 1991–2020 normals from Eudora, AR (135 ft), under a mile south.
Updated
In Eudora, the last spring frost (32°F) is around March 13 in half of years and has passed by April 5 in nine years out of ten. The first fall frost comes around November 14, as early as October 30 one year in ten, leaving a typical freeze-free season of 244 days (NOAA, Eudora, AR).
- Last spring frost
- March 13
- First fall frost
- November 14
- Growing season
- 244 days
- Hardiness zone
- 8b
50% probability
50% probability
freeze-free, 50%
15 to 20°F (-9.4 to -6.7°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 14%
- Snow per year
- 0.1"
median, 1991–2020
median, 1991–2020
4 of 28 observed
NOAA normal
Frost risk by date in Eudora
Half of springs at Eudora, AR see their last 32°F night by March 13; only one in ten is past it by February 23, and one in ten still has one after April 5. Planting tender crops after March 23 leaves a 30% risk of a frost on them, after March 30 20%, and after April 5 10%. The 23 days between the even-odds date and the one-in-ten date is the widest of the 105 Arkansas stations behind this site's ZIP pages, so a fixed calendar date is a gamble here.
In fall the first 32°F night comes by November 14 in half of years, as early as October 30 one year in ten, and holds off past December 3 one year in ten. A hard freeze of 28°F follows 15 days later, around November 29; in spring the one-in-ten date for 28°F is March 24, 12 days before the 32°F one. The freeze-free season lasts 244 days in a typical year, longer than at 90% of the 105 Arkansas stations; it reaches 272 days one year in ten and falls short of 215 one year in ten. On average 45 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 18 days longer, to about March 31, and return around November 3. Nights of 24°F, cold enough to damage hardier plants, come in 98% of winters and 16°F in 39%.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 8 | Mar 15 | Mar 21 | Mar 26 | Mar 31 | Apr 3 | Apr 6 | Apr 10 | Apr 18 |
| 32°F | Feb 23 | Feb 28 | Mar 4 | Mar 9 | Mar 13 | Mar 18 | Mar 23 | Mar 30 | Apr 5 |
| 28°F | Feb 4 | Feb 14 | Feb 20 | Feb 24 | Feb 28 | Mar 3 | Mar 7 | Mar 14 | Mar 24 |
| 24°F98% of yrs | Jan 12 | Jan 26 | Jan 31 | Feb 4 | Feb 10 | Feb 16 | Feb 24 | Mar 1 | Mar 7 |
| 20°F76% of yrs | Dec 31 | Jan 9 | Jan 16 | Jan 23 | Jan 28 | Feb 1 | Feb 7 | Feb 16 | Feb 27 |
| 16°F39% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 20 | Oct 25 | Oct 29 | Nov 1 | Nov 3 | Nov 6 | Nov 9 | Nov 13 | Nov 20 |
| 32°F | Oct 30 | Nov 3 | Nov 6 | Nov 10 | Nov 14 | Nov 19 | Nov 23 | Nov 28 | Dec 3 |
| 28°F | Nov 6 | Nov 12 | Nov 18 | Nov 24 | Nov 29 | Dec 2 | Dec 6 | Dec 13 | Dec 22 |
| 24°F98% of yrs | Nov 18 | Nov 29 | Dec 4 | Dec 10 | Dec 17 | Dec 24 | Dec 31 | Jan 4 | Jan 12 |
| 20°F76% of yrs | Dec 7 | Dec 19 | Dec 27 | Jan 1 | Jan 3 | Jan 7 | Jan 13 | Jan 19 | Feb 1 |
| 16°F39% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at Eudora, 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 71640 →Compare Eudora with another place →
Weather by month in Eudora
July is the warmest month at Eudora, AR, averaging 93°F by day and 72°F at night; January is the coldest at 55°F and 34°F. A freezing night is all but certain in every month from December to February (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, March still brings one in 74% of years and April still brings one in 17% of years.
Warmth for growing adds up to 5,974 growing degree days a year (base 50°F), more than at 99% of the 105 Arkansas stations. 40% of them (2,401) have built up by the end of June, and July adds the most, 1,004. Precipitation totals 60.6 inches a year, most in April (6.6") and least in September (4.0"); May to September bring 35% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 55 | 34 | 6.1 | 100% | 14 | 57 |
| Feb | 59 | 37 | 5.8 | 98% | 9 | 88 |
| Mar | 67 | 45 | 5.5 | 74% | 3 | 239 |
| Apr | 76 | 52 | 6.6 | 17% | <1 | 424 |
| May | 84 | 62 | 4.8 | 0% | 0 | 701 |
| Jun | 90 | 70 | 4.2 | 0% | 0 | 894 |
| Jul | 93 | 72 | 4.1 | 0% | 0 | 1004 |
| Aug | 94 | 71 | 4.2 | 0% | 0 | 995 |
| Sep | 89 | 65 | 4.0 | 0% | 0 | 799 |
| Oct | 79 | 53 | 4.7 | 12% | 1 | 497 |
| Nov | 67 | 43 | 4.7 | 82% | 5 | 200 |
| Dec | 57 | 36 | 5.9 | 99% | 12 | 77 |
Monthly normals 1991–2020 at Eudora, AR (135 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, Greenville, MS, 20 miles northeast of Eudora, has the same 50% last-frost date, a first frost 1 day later (November 15), a season 3 days longer.
When it snows in Eudora, Arkansas
Measurable snow is rare here: only 4 of 28 winters from 1991 to 2020 recorded 0.1 inch or more at Eudora, AR, 0.3 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 71640
| When | What to do |
|---|---|
| January 2 – January 16 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| January 16 – January 30 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| February 13 – February 27 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| March 13 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 22 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 31 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 14 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 71640 is under a mile from Eudora, AR, which stands at 135 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 71640 in zone 8b, the band where the coldest night of the year averaged 15 to 20°F (-9.4 to -6.7°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.