USDA Hardiness Zone 7a
Frost Dates for 62832 — Du Quoin, Illinois
NOAA 1991–2020 normals from Du Quoin 4 SE, IL (420 ft), 3 miles southeast.
Updated
In Du Quoin, the last spring frost (32°F) is around April 6 in half of years and has passed by April 22 in nine years out of ten. The first fall frost comes around October 22, as early as October 9 one year in ten, leaving a typical freeze-free season of 199 days (NOAA, Du Quoin 4 SE, IL).
- Last spring frost
- April 6
- First fall frost
- October 22
- Growing season
- 199 days
- Hardiness zone
- 7a
50% probability
50% probability
freeze-free, 50%
0 to 5°F (-17.8 to -15.0°C) coldest night
- First snow
- December 15
- Last snow
- February 24
- Winters with snow
- 95%
- Snow per year
- 11.9"
median, 1991–2020
median, 1991–2020
19 of 20 observed
NOAA normal
Frost risk by date in Du Quoin
Half of springs at Du Quoin 4 SE, IL see their last 32°F night by April 6; only one in ten is past it by March 23, and one in ten still has one after April 22. Planting tender crops after April 13 leaves a 30% risk of a frost on them, after April 17 20%, and after April 22 10%. The 16 days between the even-odds date and the one-in-ten date is narrower than at 22% of the 158 Illinois stations behind this site's ZIP pages.
In fall the first 32°F night comes by October 22 in half of years, as early as October 9 one year in ten, and holds off past November 5 one year in ten. A hard freeze of 28°F follows 11 days later, around November 2; in spring the one-in-ten date for 28°F is April 11, 11 days before the 32°F one. The freeze-free season lasts 199 days in a typical year, longer than at 85% of the 158 Illinois stations; it reaches 218 days one year in ten and falls short of 177 one year in ten. On average 93 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 13 days longer, to about April 19, and return around October 12. Severe cold of 16°F or below comes every winter, usually between December 9 and February 24.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Apr 4 | Apr 9 | Apr 12 | Apr 15 | Apr 19 | Apr 21 | Apr 25 | Apr 29 | May 4 |
| 32°F | Mar 23 | Mar 29 | Apr 1 | Apr 4 | Apr 6 | Apr 10 | Apr 13 | Apr 17 | Apr 22 |
| 28°F | Mar 10 | Mar 16 | Mar 20 | Mar 24 | Mar 27 | Mar 30 | Apr 2 | Apr 6 | Apr 11 |
| 24°F | Feb 28 | Mar 4 | Mar 8 | Mar 12 | Mar 15 | Mar 18 | Mar 22 | Mar 26 | Mar 31 |
| 20°F | Feb 13 | Feb 22 | Feb 27 | Mar 2 | Mar 5 | Mar 8 | Mar 12 | Mar 15 | Mar 21 |
| 16°F | Jan 31 | Feb 7 | Feb 12 | Feb 19 | Feb 24 | Feb 28 | Mar 3 | Mar 7 | Mar 14 |
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Sep 29 | Oct 4 | Oct 7 | Oct 9 | Oct 12 | Oct 15 | Oct 18 | Oct 21 | Oct 26 |
| 32°F | Oct 9 | Oct 14 | Oct 17 | Oct 20 | Oct 22 | Oct 25 | Oct 28 | Nov 1 | Nov 5 |
| 28°F | Oct 21 | Oct 25 | Oct 29 | Nov 1 | Nov 2 | Nov 5 | Nov 9 | Nov 13 | Nov 18 |
| 24°F | Nov 1 | Nov 4 | Nov 7 | Nov 11 | Nov 14 | Nov 19 | Nov 24 | Nov 28 | Dec 3 |
| 20°F | Nov 8 | Nov 13 | Nov 18 | Nov 24 | Nov 28 | Dec 1 | Dec 5 | Dec 10 | Dec 17 |
| 16°F | Nov 18 | Nov 26 | Dec 1 | Dec 5 | Dec 9 | Dec 14 | Dec 19 | Dec 25 | Jan 1 |
Freeze probabilities 1991–2020 at Du Quoin 4 SE, IL, 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 62832 →Compare Du Quoin with another place →
Weather by month in Du Quoin
July is the warmest month at Du Quoin 4 SE, IL, averaging 87°F by day and 68°F at night; January is the coldest at 40°F and 24°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 70% of years.
Warmth for growing adds up to 4,113 growing degree days a year (base 50°F), more than at 88% of the 158 Illinois stations. 38% of them (1,578) have built up by the end of June, and July adds the most, 849. Precipitation totals 47.8 inches a year, most in May (5.5") and least in February (2.9"); May to September bring 44% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 40 | 24 | 3.2 | 100% | 24 | 8 |
| Feb | 46 | 28 | 2.9 | 100% | 19 | 15 |
| Mar | 56 | 36 | 4.4 | 99% | 11 | 80 |
| Apr | 68 | 46 | 5.4 | 70% | 2 | 245 |
| May | 76 | 56 | 5.5 | 1% | 0 | 500 |
| Jun | 84 | 64 | 4.8 | 0% | 0 | 730 |
| Jul | 87 | 68 | 3.9 | 0% | 0 | 849 |
| Aug | 86 | 65 | 3.3 | 0% | 0 | 795 |
| Sep | 80 | 57 | 3.4 | 2% | 0 | 550 |
| Oct | 69 | 46 | 3.7 | 78% | 2 | 263 |
| Nov | 55 | 36 | 4.1 | 100% | 12 | 65 |
| Dec | 44 | 28 | 3.2 | 100% | 21 | 14 |
Monthly normals 1991–2020 at Du Quoin 4 SE, IL (420 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, Rend Lake Dam, IL, 14 miles east of Du Quoin, has a last frost 2 days earlier (April 4), a first frost 5 days later (October 27), a season 5 days longer.
When it snows in Du Quoin, Illinois
The first measurable snow (0.1 inch or more) in Du Quoin usually arrives around December 15, and the last of the season around February 24. Those are the middle dates across the winters of 1991–2020 at Du Quoin 4 SE, IL, 3.4 miles away: half of years saw snow earlier, half later. Snow fell in 95% of those winters. The last 32°F night of spring typically comes 41 days after the last snow.
Planting calendar for 62832
| When | What to do |
|---|---|
| January 26 – February 9 | Start peppers and aubergines indoorsThey need eight to ten weeks under lights before they can go out. |
| February 9 – February 23 | Start tomatoes indoorsSix to eight weeks gives a transplant big enough to set fruit early. |
| March 9 – March 23 | Sow peas, spinach, lettuce, radish outdoorsThese tolerate light frost and prefer to germinate in cool soil. |
| April 6 onward | Transplant tomatoes, peppers, basil, squash, cucumbersThe average last freeze has passed — still watch the actual forecast. |
| by July 30 | Sow the autumn crop of carrots, beets and brassicasThey need about twelve weeks to size up before growth stops. |
| by October 8 | Harvest tender crops, or be ready to cover themA first freeze two weeks early is well within normal variation. |
| October 22 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 62832 is 3 miles from Du Quoin 4 SE, IL, which stands at 420 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. 1 other ZIP code shares the station. The 2023 USDA Plant Hardiness Zone Map lists ZIP 62832 in zone 7a, the band where the coldest night of the year averaged 0 to 5°F (-17.8 to -15.0°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.