Frost dates for 71820Alleene, AR
The average last spring frost in Alleene is March 26 and the average first fall frost is November 5, giving a typical growing season of about 226 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 26
- Average first fall frost
- Nov 5
- Growing season
- 226 days
Safer after Apr 11 (1-in-10 risk)
Possible by Oct 21 (1-in-10 risk)
First frost typically in 5 days
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | Mar 23 · Apr 9 · Apr 25 | Oct 13 · Oct 27 · Nov 9 | 202 days | 100% |
| Frost / freeze (32°F) | Mar 4 · Mar 26 · Apr 11 | Oct 21 · Nov 5 · Nov 23 | 226 days | 100% |
| Hard freeze (28°F) | Feb 19 · Mar 9 · Mar 30 | Nov 1 · Nov 15 · Dec 5 | 253 days | 100% |
Planting calendar for Alleene
Planting windows from the University of Maryland Extension calendar, shifted to your average frost dates. Use them as a starting point and adjust for seed packet instructions and local conditions.
| Crop | Task | Window |
|---|---|---|
| Tomatoes | Start seeds indoors | Feb 23 – May 1 |
| Tomatoes | Transplant outdoors | Apr 11 – Jul 16 |
| Peppers | Start seeds indoors | Feb 23 – Mar 26 |
| Peppers | Transplant outdoors | Apr 25 – May 26 |
| Eggplant | Start seeds indoors | Mar 12 – Apr 10 |
| Eggplant | Transplant outdoors | Apr 25 – May 26 |
| Cucumbers | Sow outdoors | Apr 25 – Jul 26 |
| Summer squash | Sow outdoors | Apr 11 – May 26 |
| Winter squash & pumpkins | Sow outdoors | Apr 25 – May 26 |
| Snap beans | Sow outdoors | Apr 11 – Aug 18 |
| Sweet corn | Sow outdoors | Apr 11 – Jul 16 |
| Watermelon & cantaloupe | Sow outdoors | Apr 25 – May 26 |
| Okra | Sow outdoors | Apr 18 – May 11 |
| Peas | Sow outdoors (spring) | Feb 23 – Apr 10 |
| Potatoes | Plant outdoors (spring) | Feb 23 – Apr 25 |
| Onions | Start seeds indoors (spring) | Jan 12 – Feb 8 |
| Onions | Transplant outdoors (spring) | Mar 12 – Apr 10 |
| Broccoli | Start seeds indoors (spring) | Feb 5 – Mar 11 |
| Broccoli | Transplant outdoors (spring) | Mar 12 – Apr 10 |
| Broccoli | Start seeds indoors (fall) | Jul 6 – Jul 16 |
| Broccoli | Transplant outdoors (fall) | Aug 5 – Aug 16 |
| Cabbage | Start seeds indoors (spring) | Jan 26 – Feb 23 |
| Cabbage | Transplant outdoors (spring) | Feb 23 – Mar 26 |
| Cabbage | Start seeds indoors (fall) | Jun 26 – Jul 26 |
| Cabbage | Transplant outdoors (fall) | Jul 26 – Aug 26 |
| Leaf lettuce | Sow outdoors (spring) | Feb 23 – May 11 |
| Leaf lettuce | Sow outdoors (fall) | Jul 26 – Sep 11 |
| Spinach | Sow outdoors (spring) | Feb 16 – Apr 1 |
| Spinach | Sow outdoors (fall) | Aug 12 – Sep 16 |
| Radishes | Sow outdoors (spring) | Feb 23 – Apr 15 |
| Radishes | Sow outdoors (fall) | Jul 26 – Sep 26 |
| Kale | Sow outdoors (spring) | Mar 12 – Apr 1 |
| Kale | Sow outdoors (fall) | Jul 19 – Aug 26 |
| Carrots | Sow outdoors (spring) | Mar 26 – May 11 |
| Carrots | Sow outdoors (fall) | Jun 26 – Aug 11 |
| Garlic | Plant outdoors (fall) | Oct 26 – Nov 26 |
Where these dates come from
ZIP code 71820 is matched to the NOAA station De Queen Sevier Co Ap, AR, 30.9 km away, at 355 ft elevation (47 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| De Queen Sevier Co Ap, AR (used) | 355 ft | Mar 26 | Nov 5 |
| Ashdown 4 Sse, AR | 320 ft | Mar 24 | Nov 11 |
| Dequeen, AR | 407 ft | Mar 29 | Nov 5 |
| Nashville, AR | 400 ft | Mar 26 | Nov 9 |
Frost dates near Alleene
- Wilton, AR 71865 · last Mar 24, first Nov 11
- Ben Lomond, AR 71823 · last Mar 26, first Nov 9
- Winthrop, AR 71866 · last Mar 26, first Nov 5
- Foreman, AR 71836 · last Mar 29, first Nov 5
- Horatio, AR 71842 · last Mar 29, first Nov 5
- Ashdown, AR 71822 · last Mar 24, first Nov 11
- Lockesburg, AR 71846 · last Mar 29, first Nov 5
- De Queen, AR 71832 · last Mar 29, first Nov 5
Frequently asked questions
- When is the last frost in Alleene, AR?
- For ZIP code 71820, the average last spring frost (32°F) is March 26, based on NOAA 1991-2020 climate normals for the De Queen Sevier Co Ap, AR weather station. There is a 1-in-10 chance of a frost after April 11.
- When is the first frost in Alleene, AR?
- The average first fall frost (32°F) is November 5. There is a 1-in-10 chance of frost by October 21, so tender plants are at risk from that point on.
- How long is the growing season in 71820?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 226 days long.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.