USDA Hardiness Zone 9a
Frost Dates for 31546 — Jesup, Georgia
NOAA 1991–2020 normals from Jesup 8 S, GA (100 ft), 5 miles south.
Updated
In Jesup, the last spring frost (32°F) is around March 24 in half of years and has passed by April 9 in nine years out of ten. The first fall frost comes around November 10, as early as October 28 one year in ten, leaving a typical freeze-free season of 233 days (NOAA, Jesup 8 S, GA).
- Last spring frost
- March 24
- First fall frost
- November 10
- Growing season
- 233 days
- Hardiness zone
- 9a
50% probability
50% probability
freeze-free, 50%
20 to 25°F (-6.7 to -3.9°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 5%
- Snow per year
- —
median, 1991–2020
median, 1991–2020
1 of 20 observed
NOAA normal
Frost risk by date in Jesup
Half of springs at Jesup 8 S, GA see their last 32°F night by March 24; only one in ten is past it by March 5, 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 16 days between the even-odds date and the one-in-ten date is narrower than at 70% of the 127 Georgia stations behind this site's ZIP pages.
In fall the first 32°F night comes by November 10 in half of years, as early as October 28 one year in ten, and holds off past December 1 one year in ten. A hard freeze of 28°F follows 11 days later, around November 21; in spring the one-in-ten date for 28°F is March 28, 12 days before the 32°F one. The freeze-free season lasts 233 days in a typical year, shorter than at 53% of the 127 Georgia stations; it reaches 259 days one year in ten and falls short of 209 one year in ten. On average 42 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 11 days longer, to about April 4, and return around November 1. Nights of 24°F, cold enough to damage hardier plants, come in 99% of winters and 16°F in 42%.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 17 | Mar 24 | Mar 28 | Apr 1 | Apr 4 | Apr 8 | Apr 11 | Apr 17 | Apr 24 |
| 32°F | Mar 5 | Mar 12 | Mar 16 | Mar 20 | Mar 24 | Mar 27 | Mar 31 | Apr 4 | Apr 9 |
| 28°F | Feb 12 | Feb 22 | Feb 28 | Mar 5 | Mar 10 | Mar 14 | Mar 18 | Mar 22 | Mar 28 |
| 24°F99% of yrs | Jan 15 | Jan 27 | Feb 2 | Feb 9 | Feb 17 | Feb 25 | Mar 2 | Mar 8 | Mar 17 |
| 20°F83% of yrs | Dec 26 | Jan 7 | Jan 15 | Jan 22 | Jan 29 | Feb 3 | Feb 10 | Feb 22 | Mar 3 |
| 16°F42% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 20 | Oct 25 | Oct 28 | Oct 30 | Nov 1 | Nov 4 | Nov 7 | Nov 10 | Nov 17 |
| 32°F | Oct 28 | Nov 1 | Nov 4 | Nov 7 | Nov 10 | Nov 13 | Nov 16 | Nov 22 | Dec 1 |
| 28°F | Nov 4 | Nov 9 | Nov 14 | Nov 17 | Nov 21 | Nov 26 | Dec 1 | Dec 7 | Dec 19 |
| 24°F99% of yrs | Nov 15 | Nov 22 | Nov 27 | Dec 2 | Dec 7 | Dec 14 | Dec 23 | Jan 2 | Jan 13 |
| 20°F83% of yrs | Nov 29 | Dec 6 | Dec 14 | Dec 22 | Dec 29 | Jan 4 | Jan 11 | Jan 19 | Feb 2 |
| 16°F42% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at Jesup 8 S, 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 31546 →Compare Jesup with another place →
Weather by month in Jesup
July is the warmest month at Jesup 8 S, GA, averaging 93°F by day and 69°F at night; January is the coldest at 62°F and 35°F. A freezing night is all but certain in every month from December 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 27% of years.
Warmth for growing adds up to 5,941 growing degree days a year (base 50°F), more than at 65% of the 127 Georgia stations. 40% of them (2,405) have built up by the end of June, and July adds the most, 958.
| Month | High °F | Low °F | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|
| Jan | 62 | 35 | 100% | 14 | 91 |
| Feb | 67 | 38 | 98% | 8 | 125 |
| Mar | 72 | 42 | 92% | 4 | 257 |
| Apr | 79 | 50 | 27% | <1 | 437 |
| May | 85 | 57 | 0% | 0 | 659 |
| Jun | 90 | 66 | 0% | 0 | 837 |
| Jul | 93 | 69 | 0% | 0 | 958 |
| Aug | 91 | 68 | 0% | 0 | 924 |
| Sep | 86 | 65 | 0% | 0 | 763 |
| Oct | 80 | 53 | 17% | <1 | 509 |
| Nov | 72 | 42 | 87% | 5 | 245 |
| Dec | 65 | 37 | 99% | 10 | 137 |
Monthly normals 1991–2020 at Jesup 8 S, GA (100 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, Nahunta 6NE, GA, 21 miles south of Jesup, has a last frost 1 day later (March 25), a first frost 5 days later (November 15), a season 3 days longer.
When it snows in Jesup, Georgia
Measurable snow is rare here: only 1 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Jesup 8 S, GA, 4.7 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 31546
| When | What to do |
|---|---|
| January 13 – January 27 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| January 27 – February 10 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| February 24 – March 10 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| March 24 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 18 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 27 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 10 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 31546 is 5 miles from Jesup 8 S, GA, which stands at 100 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 2 other ZIP codes share the station; its figures are presented in full for 31545 (Jesup). The 2023 USDA Plant Hardiness Zone Map lists ZIP 31546 in zone 9a, the band where the coldest night of the year averaged 20 to 25°F (-6.7 to -3.9°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.