Last frost date in Glen Carbon, Illinois
April 4
Average last frost in spring. In an early year (1 in 10) it's over by March 18; in a late year (1 in 10) it comes after April 19.
November 5
Average first frost in fall. 1 year in 10 it comes by October 25.
Source: NOAA U.S. Climate Normals 1991–2020, station Alton - Melvin Price L&d (USC00110137), 11.7 miles from Glen Carbon, elevation 405 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Mar 18 | Apr 4 | Apr 19 |
| First frost in fall | Oct 25 | Nov 5 | Nov 21 |
An early or late year is one in 10: 1 year in 10 the frost comes before the early date, and 1 year in 10 after the late date.
Frost-free days in an average year: 214
Planting calendar for Glen Carbon
Fall planting
USDA dates for places whose average first freeze is about November 10 (Glen Carbon: November 5).
- CucumbersJune 1 – Aug 15 (past for this year)
- Eggplant plantsJune 1 – July 15 (past for this year)
- New Zealand spinachJune 1 – Aug 15 (past for this year)
- OkraJune 1 – Aug 20 (past for this year)
- Peppers plantsJune 1 – Aug 1 (past for this year)
- SoybeansJune 1 – July 25 (past for this year)
- Summer squashJune 1 – Aug 10 (past for this year)
- Sweet cornJune 1 – Aug 15 (past for this year)
- Sweet potatoesJune 1 – July 1 (past for this year)
- Swiss chardJune 1 – Sept 15 (past for this year)
- TomatoesJune 1 – July 15 (past for this year)
- Black-eyed peasJune 15 – Aug 15 (past for this year)
- SalsifyJune 15 – July 20 (past for this year)
- Winter squashJune 20 – July 20 (past for this year)
- Celery and celeriac plantsJuly 1 – Aug 15 (past for this year)
- Lima beansJuly 1 – Aug 15 (past for this year)
- Snap beansJuly 1 – Sept 1 (past for this year)
- Witloof chicoryJuly 10 – Aug 20 (past for this year)
- Cantaloupe (muskmelon)July 15 – 30 (past for this year)
- Florence fennelJuly 15 – Aug 15 (past for this year)
- RutabagaJuly 15 – Aug 15 (past for this year)
- WatermelonJuly 15 – 30 (past for this year)
- PotatoesJuly 25 – Aug 20 (past for this year)
- BeetsAug 1 – Oct 1 (past for this year)
- Broccoli plantsAug 1 – Sept 1 (past for this year)
- Brussels sprouts plantsAug 1 – Sept 1 (past for this year)
- CarrotsAug 1 – Sept 1 (past for this year)
- Cauliflower plantsAug 1 – Sept 1 (past for this year)
- EndiveAug 1 – Sept 1 (past for this year)
- GarlicAug 1 – Oct 1 (past for this year)
- KaleAug 1 – Sept 15 (past for this year)
- ShallotsAug 1 – Oct 1 (past for this year)
- Chinese cabbageAug 15 – Oct 1 (past for this year)
- Collards plantsAug 15 – Oct 1 (past for this year)
- Head lettuce plantsAug 15 – Oct 15 (past for this year)
- KohlrabiAug 15 – Sept 15 (past for this year)
- Mustard greensAug 15 – Nov 1Now
- SorrelAug 15 – Oct 1 (past for this year)
- Leaf lettuceAug 25 – Oct 1 (past for this year)
- Cabbage plantsSept 1 – 15 (past for this year)
- DandelionSept 1 – Oct 15 (past for this year)
- Garden peasSept 1 – Nov 1Now
- Onion plants plantsSept 1 – Oct 15 (past for this year)
- ParsleySept 1 – Nov 15Now
- RadishesSept 1 – Nov 15Now
- TurnipsSept 1 – Oct 15 (past for this year)
- SpinachSept 15 – Nov 1Now
- Corn saladOct 1 – Dec 1Now
- Onion setsOct 1 – Dec 1Now
- Upland cressOct 1 – Dec 1Now
- Asparagus plantsDec 1 – Jan 1Soon
USDA lists chervil and chives, horseradish, leeks, parsnips as generally spring-planted here.
Spring planting
USDA dates for places whose average last freeze is about March 30 (Glen Carbon: April 4).
- Corn saladJan 15 – Mar 15
- RutabagaFeb 1 – Mar 1
- SpinachFeb 1 – Mar 20
- Garden peasFeb 10 – Mar 20
- GarlicFeb 10 – Mar 10
- Asparagus plantsFeb 15 – Mar 20
- Cabbage plantsFeb 15 – Mar 10
- Chervil and chivesFeb 15 – Mar 15
- Leaf lettuceFeb 15 – Apr 15
- LeeksFeb 15 – Mar 15
- Onion plants plantsFeb 15 – Mar 15
- Onion setsFeb 15 – Mar 20
- RadishesFeb 15 – May 1
- ShallotsFeb 15 – Mar 15
- Cauliflower plantsFeb 20 – Mar 20
- DandelionFeb 20 – Mar 20
- Onion seedFeb 20 – Mar 15
- PotatoesFeb 20 – Mar 20
- SorrelFeb 20 – Apr 1
- TurnipsFeb 20 – Mar 20
- BeetsMar 1 – June 1
- Broccoli plantsMar 1 – 20
- Brussels sprouts plantsMar 1 – 20
- CarrotsMar 1 – Apr 10
- Collards plantsMar 1 – June 1
- Head lettuce plantsMar 1 – 20
- Horseradish plantsMar 1 – Apr 1
- KaleMar 1 – 20
- KohlrabiMar 1 – Apr 1
- Mustard greensMar 1 – Apr 15
- ParsleyMar 1 – Apr 1
- ParsnipsMar 1 – Apr 1
- SalsifyMar 1 – 15
- Swiss chardMar 1 – May 25
- Upland cressMar 1 – Apr 1
- EndiveMar 10 – Apr 10
- Florence fennelMar 10 – Apr 10
- Celery and celeriac plantsMar 15 – Apr 15
- Sweet cornMar 25 – May 15
- Snap beansApr 1 – June 1
- Cantaloupe (muskmelon)Apr 10 – May 15
- CucumbersApr 10 – May 15
- New Zealand spinachApr 10 – June 1
- OkraApr 10 – June 15
- Summer squashApr 10 – June 1
- TomatoesApr 10 – June 1
- WatermelonApr 10 – May 15
- Black-eyed peasApr 15 – July 1
- Eggplant plantsApr 15 – May 15
- Lima beansApr 15 – June 20
- Peppers plantsApr 15 – June 1
- SoybeansApr 20 – June 30
- Sweet potatoesApr 20 – June 1
- Witloof chicoryJune 1 – July 1
USDA lists chinese cabbage as generally fall-planted here.
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5 (earliest safe spring and latest safe fall dates), applied to this place's NOAA frost dates. “Plants” means setting out transplants, not sowing seed. How we match the table.
Nearby in Illinois
- Edwardsville 2 mi · last frost Apr 4
- Troy 5 mi · last frost Apr 12
- Collinsville 6 mi · last frost Apr 8
- Granite City 8 mi · last frost Apr 4
- Wood River 9 mi · last frost Apr 4