Frost Dates for Forestville, CA

Based on data from Graton weather station, 3 miles away

Frost Dates

Last Spring Frost (50%) iA 50% chance that the last spring frost has already passed by this date. Most gardeners use this as their primary planting guide. March 20
First Fall Frost (50%) iA 50% chance that the first fall frost has occurred by this date. Plan to harvest or protect tender plants before this date. November 13
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

30% Probability iOnly 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 April 3
First Fall Frost November 5

Hard Freeze (28°F)

Last Spring Hard Freeze February 1
First Fall Hard Freeze December 3
38.47°N, -122.89°W © OpenStreetMap

Growing Season

238 Days March 20 to November 13

USDA Hardiness Zone iHardiness 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 9a

Avg. annual minimum: 20 to 25°F (−7 to −4°C)

Learn more

Köppen Climate iThe 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.

Köppen climate map

Temperature

30° 50° 70° 90°
48°
High: 58°F
Avg: 48°F
Low: 37°F
Jan
51°
High: 62°F
Avg: 51°F
Low: 39°F
Feb
53°
High: 66°F
Avg: 53°F
Low: 41°F
Mar
56°
High: 70°F
Avg: 56°F
Low: 42°F
Apr
60°
High: 75°F
Avg: 60°F
Low: 46°F
May
65°
High: 81°F
Avg: 65°F
Low: 48°F
Jun
67°
High: 83°F
Avg: 67°F
Low: 51°F
Jul
67°
High: 84°F
Avg: 67°F
Low: 50°F
Aug
66°
High: 84°F
Avg: 66°F
Low: 48°F
Sep
61°
High: 78°F
Avg: 61°F
Low: 44°F
Oct
53°
High: 67°F
Avg: 53°F
Low: 40°F
Nov
47°
High: 58°F
Avg: 47°F
Low: 37°F
Dec
32°F
Avg High Avg Temp Avg Low Light Frost (32°F)

Precipitation

0" 3" 6" 9" 10.4"
10.2"
10.16"
Jan
9.6"
9.60"
Feb
8.5"
8.46"
Mar
5.5"
5.52"
Apr
4.3"
4.35"
May
0.0"
0.00"
Jun
0.0"
0.00"
Jul
0.0"
0.00"
Aug
0.0"
0.00"
Sep
4.7"
4.72"
Oct
8.8"
8.79"
Nov
10.4"
10.41"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14h14.5h14.5h13.5h12h11h10h9.5h
Jan: 7:12 AM – 4:48 PM · 9h 36m
Feb: 6:43 AM – 5:17 PM · 10h 34m
Mar: 6:09 AM – 5:51 PM · 11h 42m
Apr: 5:30 AM – 6:30 PM · 13h 00m
May: 4:57 AM – 7:03 PM · 14h 05m
Jun: 4:40 AM – 7:20 PM · 14h 40m
Jul: 4:47 AM – 7:13 PM · 14h 26m
Aug: 5:15 AM – 6:45 PM · 13h 30m
Sep: 5:53 AM – 6:07 PM · 12h 14m
Oct: 6:31 AM – 5:29 PM · 10h 58m
Nov: 7:04 AM – 4:56 PM · 9h 52m
Dec: 7:20 AM – 4:40 PM · 9h 20m
Daylight Longest: 14h 41m · Shortest: 9h 19m

Nearby Stations

Santa Rosa Sonoma Co AP, CA March 2 - November 20 Occidental, CA January 29 - December 30 Santa Rosa, CA February 25 - December 1 Bodega 6 Wsw, CA January 1 - December 31 Healdsburg, CA February 15 - December 2 Calistoga, CA March 2 - November 23

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 Free

Available everywhere: iOS, Android, web, and more!

Planter app garden planner preview