Frost dates for 72846Lamar, AR
The average last spring frost in Lamar is March 24 and the average first fall frost is November 10, giving a typical growing season of about 233 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 24
- Average first fall frost
- Nov 10
- Growing season
- 233 days
Safer after Apr 10 (1-in-10 risk)
Possible by Oct 28 (1-in-10 risk)
First frost typically in 13 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 19 · Apr 6 · Apr 24 | Oct 18 · Oct 31 · Nov 15 | 207 days | 100% |
| Frost / freeze (32°F) | Mar 4 · Mar 24 · Apr 10 | Oct 28 · Nov 10 · Nov 29 | 233 days | 100% |
| Hard freeze (28°F) | Feb 20 · Mar 9 · Mar 30 | Nov 6 · Nov 24 · Dec 11 | 259 days | 100% |
Planting calendar for Lamar
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 21 – Apr 29 |
| Tomatoes | Transplant outdoors | Apr 9 – Jul 21 |
| Peppers | Start seeds indoors | Feb 21 – Mar 24 |
| Peppers | Transplant outdoors | Apr 23 – May 24 |
| Eggplant | Start seeds indoors | Mar 10 – Apr 8 |
| Eggplant | Transplant outdoors | Apr 23 – May 24 |
| Cucumbers | Sow outdoors | Apr 23 – Jul 31 |
| Summer squash | Sow outdoors | Apr 9 – May 24 |
| Winter squash & pumpkins | Sow outdoors | Apr 23 – May 24 |
| Snap beans | Sow outdoors | Apr 9 – Aug 23 |
| Sweet corn | Sow outdoors | Apr 9 – Jul 21 |
| Watermelon & cantaloupe | Sow outdoors | Apr 23 – May 24 |
| Okra | Sow outdoors | Apr 16 – May 9 |
| Peas | Sow outdoors (spring) | Feb 21 – Apr 8 |
| Potatoes | Plant outdoors (spring) | Feb 21 – Apr 23 |
| Onions | Start seeds indoors (spring) | Jan 10 – Feb 6 |
| Onions | Transplant outdoors (spring) | Mar 10 – Apr 8 |
| Broccoli | Start seeds indoors (spring) | Feb 3 – Mar 9 |
| Broccoli | Transplant outdoors (spring) | Mar 10 – Apr 8 |
| Broccoli | Start seeds indoors (fall) | Jul 11 – Jul 21 |
| Broccoli | Transplant outdoors (fall) | Aug 10 – Aug 21 |
| Cabbage | Start seeds indoors (spring) | Jan 24 – Feb 21 |
| Cabbage | Transplant outdoors (spring) | Feb 21 – Mar 24 |
| Cabbage | Start seeds indoors (fall) | Jul 1 – Jul 31 |
| Cabbage | Transplant outdoors (fall) | Jul 31 – Aug 31 |
| Leaf lettuce | Sow outdoors (spring) | Feb 21 – May 9 |
| Leaf lettuce | Sow outdoors (fall) | Jul 31 – Sep 16 |
| Spinach | Sow outdoors (spring) | Feb 14 – Mar 30 |
| Spinach | Sow outdoors (fall) | Aug 17 – Sep 21 |
| Radishes | Sow outdoors (spring) | Feb 21 – Apr 13 |
| Radishes | Sow outdoors (fall) | Jul 31 – Oct 1 |
| Kale | Sow outdoors (spring) | Mar 10 – Mar 30 |
| Kale | Sow outdoors (fall) | Jul 24 – Aug 31 |
| Carrots | Sow outdoors (spring) | Mar 24 – May 9 |
| Carrots | Sow outdoors (fall) | Jul 1 – Aug 16 |
| Garlic | Plant outdoors (fall) | Oct 31 – Dec 1 |
Where these dates come from
ZIP code 72846 is matched to the NOAA station Clarksville 2N, AR, 12.9 km away, at 448 ft elevation (74 ft higher than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Clarksville 2N, AR (used) | 448 ft | Mar 24 | Nov 10 |
| Clarksville 6 Ne, AR | 850 ft | Mar 25 | Nov 10 |
| Dardanelle, AR | 370 ft | Apr 1 | Nov 2 |
| Subiaco, AR | 500 ft | Mar 28 | Nov 5 |
Frost dates near Lamar
- Knoxville, AR 72845 · last Mar 24, first Nov 10
- London, AR 72847 · last Apr 1, first Nov 2
- Clarksville, AR 72830 · last Mar 24, first Nov 10
- New Blaine, AR 72851 · last Mar 28, first Nov 5
- Delaware, AR 72835 · last Apr 1, first Nov 2
- Scranton, AR 72863 · last Mar 28, first Nov 5
- Dover, AR 72837 · last Mar 29, first Nov 2
- Hagarville, AR 72839 · last Mar 25, first Nov 10
Frequently asked questions
- When is the last frost in Lamar, AR?
- For ZIP code 72846, the average last spring frost (32°F) is March 24, based on NOAA 1991-2020 climate normals for the Clarksville 2N, AR weather station. There is a 1-in-10 chance of a frost after April 10.
- When is the first frost in Lamar, AR?
- The average first fall frost (32°F) is November 10. There is a 1-in-10 chance of frost by October 28, so tender plants are at risk from that point on.
- How long is the growing season in 72846?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 233 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.