Frost Dates for Cambridge, ID

Elevation: 808 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. May 15
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. September 27

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 May 22
First Fall Frost September 21

Hard Freeze (28°F)

Last Spring Hard Freeze April 28
First Fall Hard Freeze October 7
44.57°N, 116.68°W © OpenStreetMap

Growing Season

135 Days May 15 to September 27

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 5b

Avg. annual minimum: −15 to −10°F

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Dsa Hot-Summer Continental (Dry Summer)

Hot, dry summers and cold, wet winters. A continental version of Mediterranean climate. Summer irrigation is essential; cold-hardy crops grow well in the wet season.

Köppen climate map

Temperature

Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)
Temperature table
Average monthly temperatures (°F)
Month Avg High Avg Temp Avg Low
January30°23°17°
February37°29°21°
March51°40°29°
April62°48°35°
May72°57°42°
June80°65°49°
July93°74°56°
August92°73°54°
September80°62°44°
October63°49°34°
November44°35°26°
December32°25°19°

Precipitation

Precipitation table
Average monthly precipitation (inches)
MonthPrecipitation
January7.1
February5.3
March5.1
April4.1
May4.1
June3.5
July0.3
August0.0
September2.7
October3.2
November4.6
December6.7

Sunrise / Sunset

Daylight Longest: 15h 22m · Shortest: 8h 38m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month Sunrise Sunset Daylight
January7:30 AM4:30 PM8h 60m
February6:54 AM5:06 PM10h 12m
March6:11 AM5:49 PM11h 38m
April5:22 AM6:38 PM13h 15m
May4:42 AM7:18 PM14h 37m
June4:20 AM7:40 PM15h 21m
July4:29 AM7:31 PM15h 03m
August5:04 AM6:56 PM13h 52m
September5:51 AM6:09 PM12h 17m
October6:38 AM5:22 PM10h 43m
November7:20 AM4:40 PM9h 20m
December7:41 AM4:19 PM8h 39m

Nearby Stations

Council, IDMay 10 - October 2 Brownlee Dam, ID April 2 - November 5 Weiser, IDApril 23 - October 13 Richland, ORMay 10 - October 1 Halfway, ORMay 15 - September 24 Cascade 1 Nw, ID May 30 - September 19

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