Frost dates for 71721Beirne, AR
The average last spring frost in Beirne is March 29 and the average first fall frost is November 6, giving a typical growing season of about 224 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 29
- Average first fall frost
- Nov 6
- Growing season
- 224 days
Safer after Apr 15 (1-in-10 risk)
Possible by Oct 23 (1-in-10 risk)
First frost typically in 11 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 26 · Apr 11 · Apr 27 | Oct 15 · Oct 28 · Nov 9 | 202 days | 100% |
| Frost / freeze (32°F) | Mar 9 · Mar 29 · Apr 15 | Oct 23 · Nov 6 · Nov 22 | 224 days | 100% |
| Hard freeze (28°F) | Feb 24 · Mar 14 · Mar 31 | Nov 1 · Nov 16 · Dec 4 | 247 days | 100% |
Planting calendar for Beirne
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 26 – May 4 |
| Tomatoes | Transplant outdoors | Apr 14 – Jul 17 |
| Peppers | Start seeds indoors | Feb 26 – Mar 29 |
| Peppers | Transplant outdoors | Apr 28 – May 29 |
| Eggplant | Start seeds indoors | Mar 15 – Apr 13 |
| Eggplant | Transplant outdoors | Apr 28 – May 29 |
| Cucumbers | Sow outdoors | Apr 28 – Jul 27 |
| Summer squash | Sow outdoors | Apr 14 – May 29 |
| Winter squash & pumpkins | Sow outdoors | Apr 28 – May 29 |
| Snap beans | Sow outdoors | Apr 14 – Aug 19 |
| Sweet corn | Sow outdoors | Apr 14 – Jul 17 |
| Watermelon & cantaloupe | Sow outdoors | Apr 28 – May 29 |
| Okra | Sow outdoors | Apr 21 – May 14 |
| Peas | Sow outdoors (spring) | Feb 26 – Apr 13 |
| Potatoes | Plant outdoors (spring) | Feb 26 – Apr 28 |
| Onions | Start seeds indoors (spring) | Jan 15 – Feb 11 |
| Onions | Transplant outdoors (spring) | Mar 15 – Apr 13 |
| Broccoli | Start seeds indoors (spring) | Feb 8 – Mar 14 |
| Broccoli | Transplant outdoors (spring) | Mar 15 – Apr 13 |
| Broccoli | Start seeds indoors (fall) | Jul 7 – Jul 17 |
| Broccoli | Transplant outdoors (fall) | Aug 6 – Aug 17 |
| Cabbage | Start seeds indoors (spring) | Jan 29 – Feb 26 |
| Cabbage | Transplant outdoors (spring) | Feb 26 – Mar 29 |
| Cabbage | Start seeds indoors (fall) | Jun 27 – Jul 27 |
| Cabbage | Transplant outdoors (fall) | Jul 27 – Aug 27 |
| Leaf lettuce | Sow outdoors (spring) | Feb 26 – May 14 |
| Leaf lettuce | Sow outdoors (fall) | Jul 27 – Sep 12 |
| Spinach | Sow outdoors (spring) | Feb 19 – Apr 4 |
| Spinach | Sow outdoors (fall) | Aug 13 – Sep 17 |
| Radishes | Sow outdoors (spring) | Feb 26 – Apr 18 |
| Radishes | Sow outdoors (fall) | Jul 27 – Sep 27 |
| Kale | Sow outdoors (spring) | Mar 15 – Apr 4 |
| Kale | Sow outdoors (fall) | Jul 20 – Aug 27 |
| Carrots | Sow outdoors (spring) | Mar 29 – May 14 |
| Carrots | Sow outdoors (fall) | Jun 27 – Aug 12 |
| Garlic | Plant outdoors (fall) | Oct 27 – Nov 27 |
Where these dates come from
ZIP code 71721 is matched to the NOAA station Prescott 2 Nnw, AR, 18.6 km away, at 308 ft elevation (85 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Prescott 2 Nnw, AR (used) | 308 ft | Mar 29 | Nov 6 |
| Arkadelphia 2 N, AR | 196 ft | Mar 26 | Nov 4 |
| Sparkman, AR | 170 ft | Mar 29 | Nov 4 |
| Hope 3 Ne, AR | 375 ft | Mar 26 | Nov 6 |
Frost dates near Beirne
- Gurdon, AR 71743 · last Mar 26, first Nov 4
- Whelen Springs, AR 71772 · last Mar 29, first Nov 6
- Curtis, AR 71728 · last Mar 26, first Nov 4
- Prescott, AR 71857 · last Mar 29, first Nov 6
- Okolona, AR 71962 · last Mar 26, first Nov 4
- Bluff City, AR 71722 · last Mar 29, first Nov 6
- Cale, AR 71828 · last Mar 29, first Nov 6
- Willisville, AR 71864 · last Mar 29, first Nov 6
Frequently asked questions
- When is the last frost in Beirne, AR?
- For ZIP code 71721, the average last spring frost (32°F) is March 29, based on NOAA 1991-2020 climate normals for the Prescott 2 Nnw, AR weather station. There is a 1-in-10 chance of a frost after April 15.
- When is the first frost in Beirne, AR?
- The average first fall frost (32°F) is November 6. There is a 1-in-10 chance of frost by October 23, so tender plants are at risk from that point on.
- How long is the growing season in 71721?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 224 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.