Frost Dates for Sunnyvale, CA

Based on data from Moffett Federal Airfield weather station, 3 miles away

Elevation: 128 ft

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. January 6
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. December 23
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 January 18
First Fall Frost December 15

Hard Freeze (28°F)

Last Spring Hard Freeze January 1
First Fall Hard Freeze December 31
37.37°N, -122.04°W © OpenStreetMap

Growing Season

352 Days January 6 to December 23

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 10a

Avg. annual minimum: 30 to 35°F (−1 to 2°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

40° 50° 60° 70° 80°
51°
High: 59°F
Avg: 51°F
Low: 42°F
Jan
53°
High: 62°F
Avg: 53°F
Low: 45°F
Feb
56°
High: 65°F
Avg: 56°F
Low: 47°F
Mar
58°
High: 68°F
Avg: 58°F
Low: 49°F
Apr
62°
High: 72°F
Avg: 62°F
Low: 53°F
May
66°
High: 76°F
Avg: 66°F
Low: 56°F
Jun
68°
High: 77°F
Avg: 68°F
Low: 59°F
Jul
68°
High: 77°F
Avg: 68°F
Low: 59°F
Aug
68°
High: 78°F
Avg: 68°F
Low: 57°F
Sep
64°
High: 74°F
Avg: 64°F
Low: 53°F
Oct
56°
High: 66°F
Avg: 56°F
Low: 46°F
Nov
51°
High: 59°F
Avg: 51°F
Low: 42°F
Dec
Avg High Avg Temp Avg Low

Precipitation

0" 2" 4" 4.1"
2.8"
2.78"
Jan
3.3"
3.31"
Feb
4.1"
4.13"
Mar
3.3"
3.27"
Apr
0.5"
0.49"
May
0.0"
0.00"
Jun
0.0"
0.00"
Jul
0.0"
0.00"
Aug
0.0"
0.00"
Sep
1.0"
1.00"
Oct
1.8"
1.78"
Nov
3.1"
3.15"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9.5h10.5h11.5h13h14h14.5h14.5h13.5h12h11h10h9.5h
Jan: 7:27 AM – 5:08 PM · 9h 41m
Feb: 7:04 AM – 5:41 PM · 10h 37m
Mar: 7:26 AM – 7:09 PM · 11h 43m
Apr: 6:39 AM – 7:38 PM · 12h 58m
May: 6:04 AM – 8:05 PM · 14h 01m
Jun: 5:51 AM – 8:25 PM · 14h 34m
Jul: 6:04 AM – 8:24 PM · 14h 20m
Aug: 6:29 AM – 7:56 PM · 13h 27m
Sep: 6:56 AM – 7:09 PM · 12h 14m
Oct: 7:23 AM – 6:24 PM · 11h 01m
Nov: 6:55 AM – 4:52 PM · 9h 57m
Dec: 7:21 AM – 4:47 PM · 9h 26m
Daylight Pacific Time (PT) Longest: 14h 35m · Shortest: 9h 25m

Nearby Stations

Palo Alto, CA February 1 - December 7 San Jose, CA January 12 - December 22 Newark, CAJanuary 1 - December 27 San Jose, CA January 2 - December 25 Fremont, CA January 7 - December 22 Skyline Ridge Preserve, CA March 21 - December 15

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