Irwinton, GA frost dates
From NOAA weather station Irwinton 4 WNW (USC00094594), elevation 515 ft. The station is named for Irwinton, and its coordinates are 4.0 miles from the Census Bureau’s internal point for Irwinton city.
Summary
In the 1991–2020 record, the median last spring freeze (32°F) at Irwinton 4 WNW is Mar 12 and the median first fall freeze is Nov 19, for a typical freeze-free season of 255 days. In about 1 year in 10 the last spring freeze comes after Apr 1, and in about 1 year in 10 the first fall freeze arrives by Nov 3. The station averages 35 nights per year with a low of 32°F or colder.
Compared with the median of 126 Georgia stations in this dataset, the median last freeze here is 9 days earlier than the state median (Mar 21), the median first freeze is 7 days later than the state median (Nov 12), and the growing season ranks #31 of 126 by length (longest = #1). The spread between the 90% and 10% spring dates is 42 days, a measure of how variable spring is here.
Freeze probability table
| Threshold | Last spring occurrence | First fall occurrence | Season length (days) 90% / 50% / 10% | ||||
|---|---|---|---|---|---|---|---|
| Early (90% chance of a later freeze) | Median (50%) | Cautious (10% chance of a later freeze) | Early (10% chance by then) | Median (50%) | Late (90% chance by then) | ||
| 36°F (light frost possible) | Mar 5 | Mar 29 | Apr 12 | Oct 25 | Nov 6 | Nov 25 | 204 / 226 / 253 |
| 32°F (freeze) | Feb 18 | Mar 12 | Apr 1 | Nov 3 | Nov 19 | Dec 15 | 228 / 255 / 286 |
| 28°F (hard freeze) | Jan 29 | Feb 25 | Mar 18 | Nov 12 | Dec 4 | Jan 6 | 252 / 285 / 319 |
Read the spring “Cautious” column as the safer planting date: only about 1 year in 10 has a freeze after it. NOAA computes these from daily minimum temperatures at the station; your yard can differ, especially in low spots or at a different elevation.
Planting calendar for Irwinton
Pick how much frost risk you accept. The calendar applies generic, extension-published timing rules to this station’s dates. See the rules and sources.
| Crop | Start seeds indoors | Plant outdoors (spring) | Latest fall planting (est.) | Days to harvest |
|---|
Fall estimates count back from the median first fall freeze (32°F for tender crops, 28°F hard freeze for cool-season crops) by the longer days-to-harvest figure. These are rough planning aids, not recommendations for any specific variety; check seed packets and your county extension office.
Towns that use this station as their nearest
Census places within 15 miles whose closest station in this dataset is Irwinton 4 WNW: McIntyre (2 mi), Irwinton (4 mi), Ivey (7 mi), Gordon (7 mi), Toomsboro (9 mi), Jeffersonville (12 mi).
Nearby stations
- Milledgeville, GA — 18 mi; median last freeze Mar 25, first freeze Nov 9
- Macon Middle GA Rgnl AP, GA — 26 mi; median last freeze Mar 21, first freeze Nov 10
- Warner Robins, GA — 27 mi; median last freeze Mar 11, first freeze Nov 19
- Dublin, GA — 27 mi; median last freeze Mar 14, first freeze Nov 13
- Sandersville, GA — 27 mi; median last freeze Mar 19, first freeze Nov 13
About this station’s data
- Station ID: USC00094594 · Latitude 32.8294, longitude -83.2389 · Elevation 157 m (515 ft)
- NOAA completeness flag: R — Representative: meets WMO standards for 10 or more years; gaps filled from surrounding stations. Years of data used: 15.
- Source file: USC00094594.csv (NOAA NCEI 1991–2020 annual/seasonal normals).
Raw values from the NOAA file (32°F)
| Field | Value |
|---|---|
ANN-TMIN-PRBLST-T32FP10 | 04/01 |
ANN-TMIN-PRBLST-T32FP50 | 03/12 |
ANN-TMIN-PRBLST-T32FP90 | 02/18 |
ANN-TMIN-PRBFST-T32FP10 | 11/03 |
ANN-TMIN-PRBFST-T32FP50 | 11/19 |
ANN-TMIN-PRBFST-T32FP90 | 12/15 |
ANN-TMIN-PRBGSL-T32FP10 | 286.0 |
ANN-TMIN-PRBGSL-T32FP50 | 255.0 |
ANN-TMIN-PRBGSL-T32FP90 | 228.0 |