Frost dates for Yorkville, 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 28
typical year
Safe to plant
May 11
frost is over in 9 of 10 years
First fall frost
October 13
typical year
Growing season
166 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 31 – Apr 14 | – |
| Spinach | – | Mar 17 – Apr 7 | Aug 18 – Sep 1 |
| Lettuce | – | Mar 31 – Apr 21 | Aug 18 – Sep 1 |
| Radishes | – | Mar 31 – May 12 | Sep 1 – 15 |
| Onions | – | Mar 31 – Apr 14 | – |
| Potatoes | – | Apr 7 – 21 | – |
| Carrots | – | Apr 7 – 28 | Jul 21 – Aug 4 |
| Beets | – | Mar 31 – Apr 14 | Aug 4 – 18 |
| Kale | Feb 17 – Mar 3 | Mar 31 – Apr 14 | Aug 4 – 18 |
| Broccoli | Feb 17 – Mar 3 | Apr 14 – 28 | Aug 4 – 18 |
| Cabbage | Feb 3 – 17 | Mar 31 – Apr 14 | Aug 4 – 18 |
| Garlic | – | – | Sep 1 – 22 |
| Warm-season crops | |||
| Tomatoes | Mar 16 – 30 | May 11 – 25 | – |
| Peppers | Mar 9 – 23 | May 18 – Jun 1 | – |
| Cucumbers | – | May 11 – Jun 1 | – |
| Zucchini | – | May 11 – Jun 8 | – |
| Pumpkins | – | May 11 – Jun 1 | – |
| Green beans | – | May 11 – Aug 4 | – |
| Sweet corn | – | May 11 – Jun 8 | – |
| Basil | Apr 6 – 20 | May 18 – 25 | – |
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 | May 11 | April 28 | April 14 |
| Fall frost before | September 27 | October 13 | October 24 |
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 April 18 (May 4 in a late year), and the first one in fall around October 23.
Towns that use these dates
This is the nearest NOAA station with frost records for 11 towns.
Yorkville, Plano, Sugar Grove, Sandwich, Elburn, Hinckley, Somonauk, Big Rock, Millington, Kaneville, Millbrook
Where these dates come from
NOAA weather station CHICAGO AURORA MUNI AP, IL US (USW00004808), 1991–2020 climate normals. It's the nearest station for 12 zip codes, all within 16 miles:
60119, 60144, 60511, 60512, 60520, 60536, 60537, 60545, 60548, 60552, 60554, 60560
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.