USDA Hardiness Zone 8a
Frost Dates for 30107 — Ball Ground, Georgia
NOAA 1991–2020 normals from Jasper 1 NNW, GA (1,465 ft), 10 miles northwest.
Updated
In Ball Ground, the last spring frost (32°F) is around March 31 in half of years and has passed by April 18 in nine years out of ten. The first fall frost comes around November 5, as early as October 24 one year in ten, leaving a typical freeze-free season of 221 days (NOAA, Jasper 1 NNW, GA).
- Last spring frost
- March 31
- First fall frost
- November 5
- Growing season
- 221 days
- Hardiness zone
- 8a
50% probability
50% probability
freeze-free, 50%
10 to 15°F (-12.2 to -9.4°C) coldest night
- First snow
- January 23
- Last snow
- February 9
- Winters with snow
- 79%
- Snow per year
- 2.5"
median, 1991–2020
median, 1991–2020
22 of 28 observed
NOAA normal
Frost risk by date in Ball Ground
Half of springs at Jasper 1 NNW, GA see their last 32°F night by March 31; only one in ten is past it by March 11, and one in ten still has one after April 18. Planting tender crops after April 7 leaves a 30% risk of a frost on them, after April 11 20%, and after April 18 10%. The 18 days between the even-odds date and the one-in-ten date is narrower than at 41% of the 127 Georgia stations behind this site's ZIP pages.
In fall the first 32°F night comes by November 5 in half of years, as early as October 24 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 18; in spring the one-in-ten date for 28°F is April 6, 12 days before the 32°F one. The freeze-free season lasts 221 days in a typical year, shorter than at 72% of the 127 Georgia stations; it reaches 249 days one year in ten and falls short of 199 one year in ten. On average 61 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 14 days longer, to about April 14, and return around October 27. Nights of 24°F, cold enough to damage hardier plants, come in 100% of winters and 16°F in 86%.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 29 | Apr 3 | Apr 7 | Apr 11 | Apr 14 | Apr 18 | Apr 21 | Apr 26 | May 1 |
| 32°F | Mar 11 | Mar 18 | Mar 24 | Mar 29 | Mar 31 | Apr 4 | Apr 7 | Apr 11 | Apr 18 |
| 28°F | Feb 22 | Mar 1 | Mar 7 | Mar 13 | Mar 17 | Mar 21 | Mar 26 | Mar 31 | Apr 6 |
| 24°F | Feb 3 | Feb 12 | Feb 19 | Feb 25 | Mar 2 | Mar 6 | Mar 12 | Mar 17 | Mar 24 |
| 20°F97% of yrs | Jan 16 | Jan 28 | Feb 2 | Feb 7 | Feb 13 | Feb 19 | Feb 25 | Mar 3 | Mar 13 |
| 16°F86% of yrs | Jan 4 | Jan 12 | Jan 20 | Jan 26 | Jan 31 | Feb 2 | Feb 8 | Feb 17 | Feb 28 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 15 | Oct 20 | Oct 22 | Oct 24 | Oct 27 | Oct 29 | Nov 1 | Nov 4 | Nov 9 |
| 32°F | Oct 24 | Oct 28 | Nov 1 | Nov 2 | Nov 5 | Nov 8 | Nov 11 | Nov 16 | Nov 26 |
| 28°F | Nov 1 | Nov 5 | Nov 9 | Nov 14 | Nov 18 | Nov 23 | Nov 28 | Dec 3 | Dec 8 |
| 24°F | Nov 11 | Nov 18 | Nov 24 | Nov 29 | Dec 3 | Dec 8 | Dec 13 | Dec 21 | Dec 31 |
| 20°F97% of yrs | Nov 23 | Dec 4 | Dec 9 | Dec 15 | Dec 22 | Dec 28 | Jan 1 | Jan 6 | Jan 16 |
| 16°F86% of yrs | Dec 7 | Dec 15 | Dec 24 | Dec 29 | Jan 2 | Jan 6 | Jan 12 | Jan 18 | Jan 29 |
Freeze probabilities 1991–2020 at Jasper 1 NNW, 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 30107 →Compare Ball Ground with another place →
Weather by month in Ball Ground
July is the warmest month at Jasper 1 NNW, GA, averaging 85°F by day and 67°F at night; January is the coldest at 48°F and 31°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 49% of years.
Warmth for growing adds up to 4,168 growing degree days a year (base 50°F), fewer than at 92% of the 127 Georgia stations. 38% of them (1,573) have built up by the end of June, and July adds the most, 795. Precipitation totals 58.7 inches a year, most in March (5.9") and least in October (4.0"); May to September bring 40% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 48 | 31 | 5.5 | 100% | 17 | 21 |
| Feb | 52 | 34 | 5.0 | 100% | 13 | 29 |
| Mar | 60 | 40 | 5.9 | 93% | 8 | 114 |
| Apr | 68 | 47 | 5.1 | 49% | 2 | 258 |
| May | 75 | 56 | 4.3 | 1% | 0 | 478 |
| Jun | 82 | 63 | 4.9 | 0% | 0 | 673 |
| Jul | 85 | 67 | 5.3 | 0% | 0 | 795 |
| Aug | 84 | 66 | 4.6 | 0% | 0 | 770 |
| Sep | 79 | 61 | 4.2 | 0% | 0 | 593 |
| Oct | 69 | 50 | 4.0 | 30% | 1 | 306 |
| Nov | 59 | 40 | 4.6 | 92% | 7 | 95 |
| Dec | 51 | 35 | 5.3 | 100% | 14 | 36 |
Monthly normals 1991–2020 at Jasper 1 NNW, GA (1,465 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, Cumming 2N, GA, 16 miles southeast of Ball Ground and 325 feet lower, has a last frost 4 days later (April 4), a first frost 1 day earlier (November 4), a season 7 days shorter.
When it snows in Ball Ground, Georgia
The first measurable snow (0.1 inch or more) in Ball Ground usually arrives around January 23, and the last of the season around February 9. Those are the middle dates across the winters of 1991–2020 at Jasper 1 NNW, GA, 10 miles away: half of years saw snow earlier, half later. Snow fell in 79% of those winters. The last 32°F night of spring typically comes 50 days after the last snow.
Planting calendar for 30107
| When | What to do |
|---|---|
| January 20 – February 3 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| February 3 – February 17 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| March 3 – March 17 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| March 31 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 13 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 22 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 5 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 30107 is 10 miles from Jasper 1 NNW, GA, which stands at 1,465 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 7 other ZIP codes share the station; its figures are presented in full for 30143 (Jasper). The 2023 USDA Plant Hardiness Zone Map lists ZIP 30107 in zone 8a, the band where the coldest night of the year averaged 10 to 15°F (-12.2 to -9.4°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.