USDA Hardiness Zone 7b
Frost Dates for 35540 — Addison, Alabama
NOAA 1991–2020 normals from Addison, AL (818 ft), 2 miles north.
Updated
In Addison, the last spring frost (32°F) is around April 4 in half of years and has passed by April 24 in nine years out of ten. The first fall frost comes around November 1, as early as October 20 one year in ten, leaving a typical freeze-free season of 210 days (NOAA, Addison, AL).
- Last spring frost
- April 4
- First fall frost
- November 1
- Growing season
- 210 days
- Hardiness zone
- 7b
50% probability
50% probability
freeze-free, 50%
5 to 10°F (-15.0 to -12.2°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 28%
- Snow per year
- 0.2"
median, 1991–2020
median, 1991–2020
5 of 18 observed
NOAA normal
Frost risk by date in Addison
Half of springs at Addison, AL see their last 32°F night by April 4; only one in ten is past it by March 14, and one in ten still has one after April 24. Planting tender crops after April 12 leaves a 30% risk of a frost on them, after April 17 20%, and after April 24 10%. The 20 days between the even-odds date and the one-in-ten date is wider than at 70% of the 115 Alabama stations behind this site's ZIP pages.
In fall the first 32°F night comes by November 1 in half of years, as early as October 20 one year in ten, and holds off past November 17 one year in ten. A hard freeze of 28°F follows 12 days later, around November 13; in spring the one-in-ten date for 28°F is April 10, 14 days before the 32°F one. The freeze-free season lasts 210 days in a typical year, shorter than at 85% of the 115 Alabama stations; it reaches 235 days one year in ten and falls short of 188 one year in ten. On average 72 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 16, and return around October 23. Severe cold of 16°F or below comes in 93% of winters, usually between December 31 and February 7.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 30 | Apr 5 | Apr 9 | Apr 13 | Apr 16 | Apr 19 | Apr 24 | Apr 28 | May 2 |
| 32°F | Mar 14 | Mar 22 | Mar 28 | Apr 1 | Apr 4 | Apr 8 | Apr 12 | Apr 17 | Apr 24 |
| 28°F | Feb 28 | Mar 9 | Mar 13 | Mar 17 | Mar 22 | Mar 27 | Mar 31 | Apr 4 | Apr 10 |
| 24°F | Feb 16 | Feb 23 | Feb 28 | Mar 4 | Mar 8 | Mar 12 | Mar 16 | Mar 22 | Mar 29 |
| 20°F | Jan 30 | Feb 6 | Feb 13 | Feb 20 | Feb 24 | Feb 28 | Mar 4 | Mar 9 | Mar 15 |
| 16°F93% of yrs | Jan 8 | Jan 19 | Jan 29 | Feb 2 | Feb 7 | Feb 13 | Feb 21 | Feb 28 | Mar 6 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 10 | Oct 15 | Oct 19 | Oct 21 | Oct 23 | Oct 26 | Oct 29 | Nov 1 | Nov 5 |
| 32°F | Oct 20 | Oct 23 | Oct 27 | Oct 30 | Nov 1 | Nov 4 | Nov 7 | Nov 11 | Nov 17 |
| 28°F | Oct 30 | Nov 2 | Nov 5 | Nov 9 | Nov 13 | Nov 16 | Nov 21 | Nov 27 | Dec 4 |
| 24°F | Nov 8 | Nov 13 | Nov 18 | Nov 22 | Nov 27 | Dec 1 | Dec 5 | Dec 10 | Dec 22 |
| 20°F | Nov 17 | Nov 24 | Dec 1 | Dec 5 | Dec 9 | Dec 16 | Dec 25 | Jan 1 | Jan 8 |
| 16°F93% of yrs | Nov 28 | Dec 6 | Dec 16 | Dec 25 | Dec 31 | Jan 3 | Jan 7 | Jan 15 | Jan 28 |
Freeze probabilities 1991–2020 at Addison, AL, 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 35540 →Compare Addison with another place →
Weather by month in Addison
July is the warmest month at Addison, AL, averaging 88°F by day and 68°F at night; January is the coldest at 50°F and 29°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 59% of years.
Warmth for growing adds up to 4,640 growing degree days a year (base 50°F), fewer than at 91% of the 115 Alabama stations. 39% of them (1,787) have built up by the end of June, and July adds the most, 862. Precipitation totals 61.0 inches a year, most in December (6.3") and least in October (3.9"); May to September bring 39% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 50 | 29 | 5.4 | 100% | 20 | 35 |
| Feb | 55 | 32 | 5.6 | 100% | 15 | 42 |
| Mar | 64 | 40 | 5.4 | 95% | 9 | 150 |
| Apr | 72 | 47 | 5.9 | 59% | 2 | 298 |
| May | 79 | 56 | 5.1 | 3% | 0 | 537 |
| Jun | 85 | 64 | 4.8 | 0% | 0 | 726 |
| Jul | 88 | 68 | 4.8 | 0% | 0 | 862 |
| Aug | 88 | 66 | 4.4 | 0% | 0 | 831 |
| Sep | 83 | 60 | 4.5 | 0% | 0 | 645 |
| Oct | 73 | 48 | 3.9 | 45% | 1 | 351 |
| Nov | 62 | 39 | 4.9 | 96% | 9 | 116 |
| Dec | 53 | 33 | 6.3 | 100% | 17 | 49 |
Monthly normals 1991–2020 at Addison, AL (818 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, Moulton 2, AL, 20 miles north of Addison and 196 feet lower, has a last frost 2 days earlier (April 2), a first frost 1 day earlier (October 31), a season 1 day shorter.
When it snows in Addison, Alabama
Measurable snow is rare here: only 5 of 18 winters from 1991 to 2020 recorded 0.1 inch or more at Addison, AL, 2.3 miles away, so there is no typical first-snow date to plan around.
Planting calendar for 35540
| When | What to do |
|---|---|
| January 24 – February 7 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| February 7 – February 21 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| March 7 – March 21 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| April 4 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by August 9 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 18 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| November 1 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 35540 is 2 miles from Addison, AL, which stands at 818 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 35619 (Danville). The 2023 USDA Plant Hardiness Zone Map lists ZIP 35540 in zone 7b, the band where the coldest night of the year averaged 5 to 10°F (-15.0 to -12.2°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.