USDA Hardiness Zone 8b
Frost Dates for 30434 — Louisville, Georgia
NOAA 1991–2020 normals from Louisville 1 E, GA (322 ft), under a mile west.
Updated
In Louisville, the last spring frost (32°F) is around March 25 in half of years and has passed by April 9 in nine years out of ten. The first fall frost comes around November 7, as early as October 25 one year in ten, leaving a typical freeze-free season of 227 days (NOAA, Louisville 1 E, GA).
- Last spring frost
- March 25
- First fall frost
- November 7
- Growing season
- 227 days
- Hardiness zone
- 8b
50% probability
50% probability
freeze-free, 50%
15 to 20°F (-9.4 to -6.7°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 17%
- Snow per year
- 0.4"
median, 1991–2020
median, 1991–2020
4 of 24 observed
NOAA normal
Frost risk by date in Louisville
Half of springs at Louisville 1 E, GA see their last 32°F night by March 25; only one in ten is past it by March 6, and one in ten still has one after April 9. Planting tender crops after March 31 leaves a 30% risk of a frost on them, after April 4 20%, and after April 9 10%. The 15 days between the even-odds date and the one-in-ten date is narrower than at 83% of the 127 Georgia stations behind this site's ZIP pages.
In fall the first 32°F night comes by November 7 in half of years, as early as October 25 one year in ten, and holds off past November 26 one year in ten. A hard freeze of 28°F follows 13 days later, around November 20; in spring the one-in-ten date for 28°F is March 29, 11 days before the 32°F one. The freeze-free season lasts 227 days in a typical year, shorter than at 64% of the 127 Georgia stations; it reaches 256 days one year in ten and falls short of 205 one year in ten. On average 47 nights a year drop to 32°F or below. Nights of 36°F, when frost can still settle on leaves in low, open spots, continue 12 days longer, to about April 6, and return around October 29. Nights of 24°F, cold enough to damage hardier plants, come in 99% of winters and 16°F in 52%.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 21 | Mar 27 | Mar 31 | Apr 3 | Apr 6 | Apr 9 | Apr 12 | Apr 16 | Apr 20 |
| 32°F | Mar 6 | Mar 13 | Mar 18 | Mar 21 | Mar 25 | Mar 28 | Mar 31 | Apr 4 | Apr 9 |
| 28°F | Feb 17 | Feb 26 | Mar 2 | Mar 8 | Mar 12 | Mar 16 | Mar 20 | Mar 25 | Mar 29 |
| 24°F99% of yrs | Jan 25 | Feb 2 | Feb 10 | Feb 17 | Feb 24 | Mar 1 | Mar 5 | Mar 11 | Mar 19 |
| 20°F87% of yrs | Jan 2 | Jan 15 | Jan 22 | Jan 30 | Feb 4 | Feb 11 | Feb 19 | Mar 1 | Mar 6 |
| 16°F52% of yrs | Dec 27 | Jan 6 | Jan 12 | Jan 19 | Jan 26 | Jan 30 | Feb 4 | Feb 10 | Feb 26 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 16 | Oct 21 | Oct 24 | Oct 27 | Oct 29 | Nov 1 | Nov 3 | Nov 7 | Nov 11 |
| 32°F | Oct 25 | Oct 30 | Nov 2 | Nov 4 | Nov 7 | Nov 10 | Nov 15 | Nov 19 | Nov 26 |
| 28°F | Nov 4 | Nov 8 | Nov 12 | Nov 16 | Nov 20 | Nov 25 | Dec 1 | Dec 5 | Dec 14 |
| 24°F99% of yrs | Nov 16 | Nov 24 | Dec 1 | Dec 3 | Dec 8 | Dec 15 | Dec 25 | Jan 3 | Jan 13 |
| 20°F87% of yrs | Dec 1 | Dec 8 | Dec 16 | Dec 24 | Jan 1 | Jan 5 | Jan 11 | Jan 17 | Jan 31 |
| 16°F52% of yrs | Dec 14 | Dec 23 | Jan 1 | Jan 6 | Jan 11 | Jan 15 | Jan 23 | Jan 30 | Feb 8 |
Freeze probabilities 1991–2020 at Louisville 1 E, GA, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.
Frost risk on any date in 30434 →Compare Louisville with another place →
Weather by month in Louisville
July is the warmest month at Louisville 1 E, GA, averaging 91°F by day and 70°F at night; January is the coldest at 57°F and 34°F. A freezing night is all but certain in every month from November to March (a 90% chance or more). From May to September the chance of a 32°F night stays under 10% each month. In spring, April still brings one in 29% of years.
Warmth for growing adds up to 5,558 growing degree days a year (base 50°F), more than at 50% of the 127 Georgia stations. 40% of them (2,249) have built up by the end of June, and July adds the most, 955. Precipitation totals 47.7 inches a year, most in August (4.9") and least in October (2.6"); May to September bring 45% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 57 | 34 | 4.4 | 100% | 14 | 64 |
| Feb | 61 | 37 | 4.1 | 98% | 9 | 84 |
| Mar | 68 | 43 | 4.4 | 92% | 5 | 216 |
| Apr | 76 | 50 | 3.2 | 29% | <1 | 393 |
| May | 83 | 59 | 3.4 | 0% | 0 | 654 |
| Jun | 89 | 67 | 4.6 | 0% | 0 | 837 |
| Jul | 91 | 70 | 4.7 | 0% | 0 | 955 |
| Aug | 90 | 70 | 4.9 | 0% | 0 | 919 |
| Sep | 85 | 64 | 4.0 | 0% | 0 | 732 |
| Oct | 76 | 52 | 2.6 | 24% | 1 | 445 |
| Nov | 67 | 42 | 3.0 | 92% | 5 | 176 |
| Dec | 59 | 36 | 4.4 | 98% | 12 | 83 |
Monthly normals 1991–2020 at Louisville 1 E, GA (322 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.
Compared with the next station
The nearest other station, Midville Exp Stn, GA, 13 miles southeast of Louisville, has a last frost 7 days earlier (March 18), a first frost 4 days later (November 11), a season 10 days longer.
When it snows in Louisville, Georgia
Measurable snow is rare here: only 4 of 24 winters from 1991 to 2020 recorded 0.1 inch or more at Louisville 1 E, GA, 0.8 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 30434
| When | What to do |
|---|---|
| January 14 – January 28 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| January 28 – February 11 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| February 25 – March 11 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| March 25 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 15 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 24 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 7 onward | Plant garlic, mulch beds, lift tender bulbsGarlic wants a cold spell; bare soil loses structure over winter. |
The weeks before and after the 50% dates are general rules of thumb, not NOAA figures; a seed packet gives the timing for each variety.
Where these figures come from
ZIP 30434 is under a mile from Louisville 1 E, GA, which stands at 322 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 30434 in zone 8b, the band where the coldest night of the year averaged 15 to 20°F (-9.4 to -6.7°C) over 1991–2020; a zone describes winter lows, not frost dates.
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.