Frost dates / Georgia / Macon-Bibb County
Frost dates in Macon-Bibb County, GA
The station on this page is MACON MIDDLE GA RGNL AP, GA US (USW00003813), 8.9 miles from the city point. Population in the Census 2024 estimate is 157,056.
Zone 8bUSDA average annual extreme minimum 15°F to 20°F, from ZIP 31206 (1.2 miles from the city point used on this page).
Outside the median season Growing seasonTicks: 10%, 50%, and 90%
Last 32°F in spring
NCEI’s probability is the chance the last spring minimum of 32°F or lower occurs on or after the date.
| Probability | Date | How to read it |
|---|---|---|
| 90% | February 28 | Earlier date. A last 32°F on or after this day is common. |
| 50% | March 21 | Median. |
| 10% | April 7 | Later date. A last 32°F on or after this day is uncommon. |
First 32°F in fall
NCEI’s probability is the chance the first autumn minimum of 32°F or lower occurs on or before the date.
| Probability | Date | How to read it |
|---|---|---|
| 10% | October 29 | Earlier date. A first 32°F on or before this day is uncommon. |
| 50% | November 10 | Median. |
| 90% | November 29 | Later date. A first 32°F on or before this day is common. |
32°F growing-season length
Days between the last spring 32°F and the first autumn 32°F. The figure is a length the season meets or exceeds at that probability, from NCEI, not a subtraction done on this site.
| Probability the season is at least this long | Days |
|---|---|
| 10% | 260 |
| 50% | 235 |
| 90% | 212 |
28°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | March 24 | March 3 | February 5 |
| First, on or before | November 6 | November 24 | December 21 |
| Season at least | 297 days | 267 days | 238 days |
36°F threshold
| 10% | 50% | 90% | |
|---|---|---|---|
| Last, on or after | April 19 | April 3 | March 17 |
| First, on or before | October 20 | November 1 | November 13 |
| Season at least | 232 days | 211 days | 189 days |
Station MACON MIDDLE GA RGNL AP, GA US (USW00003813). Completeness flag S, 24 years used for the 32°F dates. NCEI’s annual probability of at least one day at or below 32°F is 100%. Freeze dates are conditional on that threshold occurring. Elevation 104.5 m. The same probability language applies to the 28°F and 36°F rows when those dates passed the same quality checks.
Planting calendar for Macon-Bibb County · Zone 8b
Check a crop against this station
Macon-Bibb County, GA
Zone 8bAverage annual extreme minimum 15°F to 20°F
Outside the median season Growing seasonTicks: 10%, 50%, and 90%
Georgia. Nearest qualified station: MACON MIDDLE GA RGNL AP, GA US (USW00003813), 8.9 miles. Median last 32°F March 21. Median first 32°F November 10. The 50% growing-season length is 235 days.
Open the ZIP page · Crop guides for Georgia
32°F probabilities at this station
| 10% | 50% | 90% | |
|---|---|---|---|
| Last 32°F on or after | April 7 | March 21 | February 28 |
| First 32°F on or before | October 29 | November 10 | November 29 |
Column order matches the NCEI file: for the last freeze, 10% is the later date and 90% is the earlier date. How to read the probabilities.
Planting calendar
Windows below are from UGA Cooperative Extension, Vegetable Gardening in Georgia, Circular 963, retrieved 2026-10-10. Circular 963, revised June 2023, prints one vegetable planting chart for the state. It does not give separate dates for North, Middle, and South Georgia. Where several cultivar rows share a crop name, the page uses the dates those rows print in common and names the row when a date differs.
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