Frost dates for Ione, CA
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
March 4
typical year
Safe to plant
April 8
frost is over in 9 of 10 years
First fall frost
December 11
typical year
Growing season
285 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 | – | Feb 4 – 18 | – |
| Spinach | – | Jan 21 – Feb 11 | Oct 16 – 30 |
| Lettuce | – | Feb 4 – 25 | Oct 16 – 30 |
| Radishes | – | Feb 4 – Mar 18 | Oct 30 – Nov 13 |
| Onions | – | Feb 4 – 18 | – |
| Potatoes | – | Feb 11 – 25 | – |
| Carrots | – | Feb 11 – Mar 4 | Sep 18 – Oct 2 |
| Beets | – | Feb 4 – 18 | Oct 2 – 16 |
| Kale | Dec 24 – Jan 7 | Feb 4 – 18 | Oct 2 – 16 |
| Broccoli | Dec 24 – Jan 7 | Feb 18 – Mar 4 | Oct 2 – 16 |
| Cabbage | Dec 10 – 24 | Feb 4 – 18 | Oct 2 – 16 |
| Garlic | – | – | Oct 30 – Nov 20 |
| Warm-season crops | |||
| Tomatoes | Feb 11 – 25 | Apr 8 – 22 | – |
| Peppers | Feb 4 – 18 | Apr 15 – 29 | – |
| Cucumbers | – | Apr 8 – 29 | – |
| Zucchini | – | Apr 8 – May 6 | – |
| Pumpkins | – | Apr 8 – 29 | – |
| Green beans | – | Apr 8 – Oct 2 | – |
| Sweet corn | – | Apr 8 – May 6 | – |
| Basil | Mar 4 – 18 | Apr 15 – 22 | – |
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 8 | March 4 | January 6 |
| Fall frost before | November 19 | December 11 | January 4 |
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 January 10 (March 2 in a late year), and the first one in fall around December 27.
Towns that use these dates
This is the nearest NOAA station with frost records for 5 towns.
Ione, Jackson, Sutter Creek, Plymouth, Amador City
Where these dates come from
NOAA weather station SUTTER HILL CDF, CA US (USC00048713), 1991–2020 climate normals. It's the nearest station for 11 zip codes, all within 12 miles:
95232, 95245, 95601, 95629, 95640, 95642, 95665, 95669, 95685, 95689, 95699
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.