Frost dates for Angwin Pacific Union College, 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
April 7
typical year
Safe to plant
April 30
frost is over in 9 of 10 years
First fall frost
December 5
typical year
Growing season
245 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 10 – 24 | – |
| Spinach | – | Feb 24 – Mar 17 | Oct 10 – 24 |
| Lettuce | – | Mar 10 – 31 | Oct 10 – 24 |
| Radishes | – | Mar 10 – Apr 21 | Oct 24 – Nov 7 |
| Onions | – | Mar 10 – 24 | – |
| Potatoes | – | Mar 17 – 31 | – |
| Carrots | – | Mar 17 – Apr 7 | Sep 12 – 26 |
| Beets | – | Mar 10 – 24 | Sep 26 – Oct 10 |
| Kale | Jan 27 – Feb 10 | Mar 10 – 24 | Sep 26 – Oct 10 |
| Broccoli | Jan 27 – Feb 10 | Mar 24 – Apr 7 | Sep 26 – Oct 10 |
| Cabbage | Jan 13 – 27 | Mar 10 – 24 | Sep 26 – Oct 10 |
| Garlic | – | – | Oct 24 – Nov 14 |
| Warm-season crops | |||
| Tomatoes | Mar 5 – 19 | Apr 30 – May 14 | – |
| Peppers | Feb 26 – Mar 12 | May 7 – 21 | – |
| Cucumbers | – | Apr 30 – May 21 | – |
| Zucchini | – | Apr 30 – May 28 | – |
| Pumpkins | – | Apr 30 – May 21 | – |
| Green beans | – | Apr 30 – Sep 26 | – |
| Sweet corn | – | Apr 30 – May 28 | – |
| Basil | Mar 26 – Apr 9 | May 7 – 14 | – |
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 30 | April 7 | February 23 |
| Fall frost before | November 14 | December 5 | January 1 |
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 February 18 (April 9 in a late year), and the first one in fall around December 30.
Where these dates come from
NOAA weather station ANGWIN PACIFIC UNION COLLEGE, CA US (USC00040212), 1991–2020 climate normals. It's the nearest station for 5 zip codes, all within 18 miles:
94508, 94567, 94574, 94576, 95606
Planting dates follow common university extension advice; your local extension service can fine-tune them for your soil and microclimate.