Frost dates for 71950Kirby, AR
The average last spring frost in Kirby is April 5 and the average first fall frost is November 1, giving a typical growing season of about 209 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Apr 5
- Average first fall frost
- Nov 1
- Growing season
- 209 days
Safer after Apr 22 (1-in-10 risk)
Possible by Oct 20 (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) | Apr 2 · Apr 18 · Apr 30 | Oct 11 · Oct 23 · Nov 4 | 188 days | 100% |
| Frost / freeze (32°F) | Mar 16 · Apr 5 · Apr 22 | Oct 20 · Nov 1 · Nov 15 | 209 days | 100% |
| Hard freeze (28°F) | Mar 1 · Mar 22 · Apr 8 | Oct 29 · Nov 11 · Dec 1 | 235 days | 100% |
Planting calendar for Kirby
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 | Mar 5 – May 11 |
| Tomatoes | Transplant outdoors | Apr 21 – Jul 12 |
| Peppers | Start seeds indoors | Mar 5 – Apr 5 |
| Peppers | Transplant outdoors | May 5 – Jun 5 |
| Eggplant | Start seeds indoors | Mar 22 – Apr 20 |
| Eggplant | Transplant outdoors | May 5 – Jun 5 |
| Cucumbers | Sow outdoors | May 5 – Jul 22 |
| Summer squash | Sow outdoors | Apr 21 – Jun 5 |
| Winter squash & pumpkins | Sow outdoors | May 5 – Jun 5 |
| Snap beans | Sow outdoors | Apr 21 – Aug 14 |
| Sweet corn | Sow outdoors | Apr 21 – Jul 12 |
| Watermelon & cantaloupe | Sow outdoors | May 5 – Jun 5 |
| Okra | Sow outdoors | Apr 28 – May 21 |
| Peas | Sow outdoors (spring) | Mar 5 – Apr 20 |
| Potatoes | Plant outdoors (spring) | Mar 5 – May 5 |
| Onions | Start seeds indoors (spring) | Jan 22 – Feb 18 |
| Onions | Transplant outdoors (spring) | Mar 22 – Apr 20 |
| Broccoli | Start seeds indoors (spring) | Feb 15 – Mar 21 |
| Broccoli | Transplant outdoors (spring) | Mar 22 – Apr 20 |
| Broccoli | Start seeds indoors (fall) | Jul 2 – Jul 12 |
| Broccoli | Transplant outdoors (fall) | Aug 1 – Aug 12 |
| Cabbage | Start seeds indoors (spring) | Feb 5 – Mar 5 |
| Cabbage | Transplant outdoors (spring) | Mar 5 – Apr 5 |
| Cabbage | Start seeds indoors (fall) | Jun 22 – Jul 22 |
| Cabbage | Transplant outdoors (fall) | Jul 22 – Aug 22 |
| Leaf lettuce | Sow outdoors (spring) | Mar 5 – May 21 |
| Leaf lettuce | Sow outdoors (fall) | Jul 22 – Sep 7 |
| Spinach | Sow outdoors (spring) | Feb 26 – Apr 11 |
| Spinach | Sow outdoors (fall) | Aug 8 – Sep 12 |
| Radishes | Sow outdoors (spring) | Mar 5 – Apr 25 |
| Radishes | Sow outdoors (fall) | Jul 22 – Sep 22 |
| Kale | Sow outdoors (spring) | Mar 22 – Apr 11 |
| Kale | Sow outdoors (fall) | Jul 15 – Aug 22 |
| Carrots | Sow outdoors (spring) | Apr 5 – May 21 |
| Carrots | Sow outdoors (fall) | Jun 22 – Aug 7 |
| Garlic | Plant outdoors (fall) | Oct 22 – Nov 22 |
Where these dates come from
ZIP code 71950 is matched to the NOAA station Murfreesboro 1W, AR, 19.6 km away, at 460 ft elevation (117 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Murfreesboro 1W, AR (used) | 460 ft | Apr 5 | Nov 1 |
| Big Fk 1 Sse, AR | 1,200 ft | Mar 26 | Nov 12 |
| Mt Ida 3 Se, AR | 697 ft | Apr 8 | Oct 26 |
| Mount Ida Asos, AR | 702 ft | Apr 2 | Oct 31 |
Frost dates near Kirby
- Langley, AR 71952 · last Apr 8, first Oct 26
- Newhope, AR 71959 · last Apr 5, first Nov 1
- Caddo Gap, AR 71935 · last Mar 26, first Nov 12
- Murfreesboro, AR 71958 · last Apr 5, first Nov 1
- Glenwood, AR 71943 · last Apr 8, first Oct 26
- Norman, AR 71960 · last Apr 8, first Oct 26
- Umpire, AR 71971 · last Mar 26, first Nov 12
- Dierks, AR 71833 · last Apr 5, first Nov 1
Frequently asked questions
- When is the last frost in Kirby, AR?
- For ZIP code 71950, the average last spring frost (32°F) is April 5, based on NOAA 1991-2020 climate normals for the Murfreesboro 1W, AR weather station. There is a 1-in-10 chance of a frost after April 22.
- When is the first frost in Kirby, AR?
- The average first fall frost (32°F) is November 1. There is a 1-in-10 chance of frost by October 20, so tender plants are at risk from that point on.
- How long is the growing season in 71950?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 209 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.