Frost dates for Blythe, 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
January 5
typical year
Safe to plant
February 18
frost is over in 9 of 10 years
First fall frost
December 21
typical year
Growing season
347 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 | – | Dec 8 – 22 | – |
| Spinach | – | Nov 24 – Dec 15 | Oct 26 – Nov 9 |
| Lettuce | – | Dec 8 – 29 | Oct 26 – Nov 9 |
| Radishes | – | Dec 8 – Jan 19 | Nov 9 – 23 |
| Onions | – | Dec 8 – 22 | – |
| Potatoes | – | Dec 15 – 29 | – |
| Carrots | – | Dec 15 – Jan 5 | Sep 28 – Oct 12 |
| Beets | – | Dec 8 – 22 | Oct 12 – 26 |
| Kale | Oct 27 – Nov 10 | Dec 8 – 22 | Oct 12 – 26 |
| Broccoli | Oct 27 – Nov 10 | Dec 22 – Jan 5 | Oct 12 – 26 |
| Cabbage | Oct 13 – 27 | Dec 8 – 22 | Oct 12 – 26 |
| Garlic | – | – | Nov 9 – 30 |
| Warm-season crops | |||
| Tomatoes | Dec 24 – Jan 7 | Feb 18 – Mar 4 | – |
| Peppers | Dec 17 – 31 | Feb 25 – Mar 11 | – |
| Cucumbers | – | Feb 18 – Mar 11 | – |
| Zucchini | – | Feb 18 – Mar 18 | – |
| Pumpkins | – | Feb 18 – Mar 11 | – |
| Green beans | – | Feb 18 – Oct 12 | – |
| Sweet corn | – | Feb 18 – Mar 18 | – |
| Basil | Jan 14 – 28 | Feb 25 – Mar 4 | – |
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 | February 18 | January 5 | December 15 |
| Fall frost before | December 2 | December 21 | January 18 |
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 December 31 (February 12 in a late year), and the first one in fall around December 30.
Where these dates come from
NOAA weather station BLYTHE AP, CA US (USW00023158), 1991–2020 climate normals. It's the nearest station for 2 zip codes, all within 31 miles:
92225, 92266
1 of these zip codes are more than 30 miles from the station, so their real frost dates may differ by a week or more.
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.