Frost dates for Granite City, IL
When the last spring frost and first fall frost usually come, and when to plant, from 30 years of NOAA weather records.
Last spring frost
April 4
typical year
Safe to plant
April 19
frost is over in 9 of 10 years
First fall frost
November 5
typical year
Growing season
214 days
frost-free, typical year
Frost watch this week
Tonight's and the next six nights' lows from the National Weather Service forecast for the station's location. Frost: 32°F or colder. Possible frost: 33–36°F, mostly in low spots on clear, still nights.
When to plant
Counted from this page's frost dates. Warm-season crops wait for the safe-to-plant date.
| Crop | Start indoors | Plant outside | Fall planting |
|---|---|---|---|
| Cool-season crops | |||
| Peas | – | Mar 7 – 21 | – |
| Spinach | – | Feb 21 – Mar 14 | Sep 10 – 24 |
| Lettuce | – | Mar 7 – 28 | Sep 10 – 24 |
| Radishes | – | Mar 7 – Apr 18 | Sep 24 – Oct 8 |
| Onions | – | Mar 7 – 21 | – |
| Potatoes | – | Mar 14 – 28 | – |
| Carrots | – | Mar 14 – Apr 4 | Aug 13 – 27 |
| Beets | – | Mar 7 – 21 | Aug 27 – Sep 10 |
| Kale | Jan 24 – Feb 7 | Mar 7 – 21 | Aug 27 – Sep 10 |
| Broccoli | Jan 24 – Feb 7 | Mar 21 – Apr 4 | Aug 27 – Sep 10 |
| Cabbage | Jan 10 – 24 | Mar 7 – 21 | Aug 27 – Sep 10 |
| Garlic | – | – | Sep 24 – Oct 15 |
| Warm-season crops | |||
| Tomatoes | Feb 22 – Mar 8 | Apr 19 – May 3 | – |
| Peppers | Feb 15 – Mar 1 | Apr 26 – May 10 | – |
| Cucumbers | – | Apr 19 – May 10 | – |
| Zucchini | – | Apr 19 – May 17 | – |
| Pumpkins | – | Apr 19 – May 10 | – |
| Green beans | – | Apr 19 – Aug 27 | – |
| Sweet corn | – | Apr 19 – May 17 | – |
| Basil | Mar 15 – 29 | Apr 26 – May 3 | – |
Onions: from sets. Green beans: until 10 weeks before the first fall frost. Garlic: harvest next summer.
The year at a glance
Start indoors Plant outside Fall planting
The chance of frost, by date
| 1 year in 10 | Half of years | 9 years in 10 | |
|---|---|---|---|
| Spring frost after | April 19 | April 4 | March 18 |
| Fall frost before | October 25 | November 5 | November 21 |
Frost here means 32°F or colder. Read across: in 1 year in 10, spring frost carries on past the first date, which is why that date is the safe-to-plant date.
Hard freeze (28°F)
A hard freeze kills most garden plants, even hardy ones. The last one in spring usually comes around March 25 (April 9 in a late year), and the first one in fall around November 16.
Towns that use these dates
This is the nearest NOAA station with frost records for 18 towns.
Granite City, Edwardsville, Alton, Godfrey, Glen Carbon, Wood River, Bethalto, Maryville, Pontoon Beach, East Alton, South Roxana, Bunker Hill, Roxana, Hartford, Worden, Hamel, Alhambra, West Alton, MO
Where these dates come from
NOAA weather station ALTON - MELVIN PRICE L&D, IL US (USC00110137), 1991–2020 climate normals. It's the nearest station for 22 zip codes, all within 22 miles:
62001, 62002, 62010, 62014, 62018, 62021, 62024, 62025, 62026, 62034, 62035, 62046, 62048, 62062, 62067, 62084, 62087, 62095, 62097, 63034, 63138, 63386
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.