Frost dates for 35085Jemison, AL
The average last spring frost in Jemison is March 21 and the average first fall frost is November 11, giving a typical growing season of about 235 days. Dates are based on NOAA 1991-2020 climate normals.
- Average last spring frost
- Mar 21
- Average first fall frost
- Nov 11
- Growing season
- 235 days
Safer after Apr 10 (1-in-10 risk)
Possible by Oct 29 (1-in-10 risk)
First frost typically in 8 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 17 · Apr 5 · Apr 23 | Oct 19 · Nov 1 · Nov 15 | 210 days | 100% |
| Frost / freeze (32°F) | Feb 28 · Mar 21 · Apr 10 | Oct 29 · Nov 11 · Dec 1 | 235 days | 100% |
| Hard freeze (28°F) | Feb 15 · Mar 7 · Mar 26 | Nov 5 · Nov 25 · Dec 21 | 262 days | 100% |
Planting calendar for Jemison
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 18 – Apr 26 |
| Tomatoes | Transplant outdoors | Apr 6 – Jul 22 |
| Peppers | Start seeds indoors | Feb 18 – Mar 21 |
| Peppers | Transplant outdoors | Apr 20 – May 21 |
| Eggplant | Start seeds indoors | Mar 7 – Apr 5 |
| Eggplant | Transplant outdoors | Apr 20 – May 21 |
| Cucumbers | Sow outdoors | Apr 20 – Aug 1 |
| Summer squash | Sow outdoors | Apr 6 – May 21 |
| Winter squash & pumpkins | Sow outdoors | Apr 20 – May 21 |
| Snap beans | Sow outdoors | Apr 6 – Aug 24 |
| Sweet corn | Sow outdoors | Apr 6 – Jul 22 |
| Watermelon & cantaloupe | Sow outdoors | Apr 20 – May 21 |
| Okra | Sow outdoors | Apr 13 – May 6 |
| Peas | Sow outdoors (spring) | Feb 18 – Apr 5 |
| Potatoes | Plant outdoors (spring) | Feb 18 – Apr 20 |
| Onions | Start seeds indoors (spring) | Jan 7 – Feb 3 |
| Onions | Transplant outdoors (spring) | Mar 7 – Apr 5 |
| Broccoli | Start seeds indoors (spring) | Jan 31 – Mar 6 |
| Broccoli | Transplant outdoors (spring) | Mar 7 – Apr 5 |
| Broccoli | Start seeds indoors (fall) | Jul 12 – Jul 22 |
| Broccoli | Transplant outdoors (fall) | Aug 11 – Aug 22 |
| Cabbage | Start seeds indoors (spring) | Jan 21 – Feb 18 |
| Cabbage | Transplant outdoors (spring) | Feb 18 – Mar 21 |
| Cabbage | Start seeds indoors (fall) | Jul 2 – Aug 1 |
| Cabbage | Transplant outdoors (fall) | Aug 1 – Sep 1 |
| Leaf lettuce | Sow outdoors (spring) | Feb 18 – May 6 |
| Leaf lettuce | Sow outdoors (fall) | Aug 1 – Sep 17 |
| Spinach | Sow outdoors (spring) | Feb 11 – Mar 27 |
| Spinach | Sow outdoors (fall) | Aug 18 – Sep 22 |
| Radishes | Sow outdoors (spring) | Feb 18 – Apr 10 |
| Radishes | Sow outdoors (fall) | Aug 1 – Oct 2 |
| Kale | Sow outdoors (spring) | Mar 7 – Mar 27 |
| Kale | Sow outdoors (fall) | Jul 25 – Sep 1 |
| Carrots | Sow outdoors (spring) | Mar 21 – May 6 |
| Carrots | Sow outdoors (fall) | Jul 2 – Aug 17 |
| Garlic | Plant outdoors (fall) | Nov 1 – Dec 2 |
Where these dates come from
ZIP code 35085 is matched to the NOAA station Thorsby Exp Stn, AL, 8 km away, at 680 ft elevation (71 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Thorsby Exp Stn, AL (used) | 680 ft | Mar 21 | Nov 11 |
| Clanton 2 Ne, AL | 584 ft | Mar 22 | Nov 10 |
| Clanton, AL | 590 ft | Mar 24 | Nov 10 |
| Alabaster Shelby Co Ap, AL | 565 ft | Mar 12 | Nov 16 |
Frost dates near Jemison
- Thorsby, AL 35171 · last Mar 21, first Nov 11
- Calera, AL 35040 · last Mar 12, first Nov 16
- Clanton, AL 35046 · last Mar 24, first Nov 10
- Wilton, AL 35187 · last Mar 12, first Nov 16
- Shelby, AL 35143 · last Mar 12, first Nov 16
- Randolph, AL 36792 · last Mar 21, first Nov 11
- Montevallo, AL 35115 · last Mar 12, first Nov 16
- Brierfield, AL 35035 · last Mar 12, first Nov 16
Frequently asked questions
- When is the last frost in Jemison, AL?
- For ZIP code 35085, the average last spring frost (32°F) is March 21, based on NOAA 1991-2020 climate normals for the Thorsby Exp Stn, AL weather station. There is a 1-in-10 chance of a frost after April 10.
- When is the first frost in Jemison, AL?
- The average first fall frost (32°F) is November 11. There is a 1-in-10 chance of frost by October 29, so tender plants are at risk from that point on.
- How long is the growing season in 35085?
- In half of years, the frost-free season (between the last and first 32°F frost) is at least 235 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.