Frost Dates for Twitchell Dam, CA
Elevation: 177 m
Frost Dates
Last Spring Frost (50%) A 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide.
February 4
First Fall Frost (50%) A 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date.
December 4
30% Probability
Only a 30% chance of frost remaining by this date. Use these dates for a safer planting window, especially for tender plants sensitive to cold.
Last Spring Frost
February 27
First Fall Frost
November 26
Hard Freeze (28°F)
Last Spring Hard Freeze
December 31
First Fall Hard Freeze
December 17
Growing Season
304 Days
February 4 to December 4
USDA Hardiness Zone
Hardiness zones indicate which perennial plants can survive winter in your area. For annual vegetables, frost dates and growing season length matter more than hardiness zone.Zone 9b
Avg. annual minimum: 25 to 30°F
Köppen Climate
The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Csb
Warm-Summer Mediterranean
Warm, dry summers and mild, wet winters. Similar to hot-summer Mediterranean but cooler. Great for a wide range of vegetables and fruit trees with moderate water needs.
Temperature
30°
50°
70°
Avg High
Avg Temp
Avg Low
Light Frost (32°F)
Temperature table
| Month | Avg High | Avg Temp | Avg Low |
|---|---|---|---|
| January | 63° | 52° | 41° |
| February | 63° | 53° | 43° |
| March | 65° | 55° | 44° |
| April | 68° | 57° | 45° |
| May | 70° | 59° | 48° |
| June | 75° | 62° | 50° |
| July | 77° | 65° | 53° |
| August | 78° | 66° | 54° |
| September | 78° | 65° | 52° |
| October | 75° | 62° | 49° |
| November | 68° | 56° | 44° |
| December | 61° | 50° | 39° |
Precipitation
0"
2"
4"
6"
6.4"
Precipitation table
| Month | Precipitation |
|---|---|
| January | 6.4 |
| February | 5.8 |
| March | 5.2 |
| April | 3.7 |
| May | 0.0 |
| June | 0.0 |
| July | 0.0 |
| August | 0.0 |
| September | 0.0 |
| October | 1.1 |
| November | 2.6 |
| December | 5.3 |
Sunrise / Sunset
Daylight
Pacific Time (PT)
Longest: 14h 21m · Shortest: 9h 39m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 7:14 AM | 5:07 PM | 9h 54m |
| February | 6:54 AM | 5:38 PM | 10h 44m |
| March | 7:19 AM | 7:03 PM | 11h 44m |
| April | 6:35 AM | 7:28 PM | 12h 53m |
| May | 6:02 AM | 7:53 PM | 13h 50m |
| June | 5:51 AM | 8:12 PM | 14h 20m |
| July | 6:03 AM | 8:11 PM | 14h 08m |
| August | 6:26 AM | 7:45 PM | 13h 19m |
| September | 6:50 AM | 7:02 PM | 12h 12m |
| October | 7:14 AM | 6:19 PM | 11h 06m |
| November | 6:43 AM | 4:50 PM | 10h 07m |
| December | 7:07 AM | 4:47 PM | 9h 39m |
Nearby Stations
Plan Your Garden with Planter
Now that you know your frost dates, use Planter to plan your veggie garden! Planter is an easy drag-and-drop garden planner with personalized planting schedules.
Try Planter For FreeAvailable everywhere: iOS, Android, web, and more!
