Frost Dates for Jamestown, SA

Based on data from Yongala weather station, 15 miles away

Elevation: 456 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. October 10
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. May 15

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 October 19
First Fall Frost May 6

Hard Freeze (−2°C)

Last Spring Hard Freeze September 5
First Fall Hard Freeze May 31
33.21°S, 138.60°E © OpenStreetMap

Growing Season

217 Days October 10 to May 15

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 9a

Avg. annual minimum: −7 to −4°C

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
BSk Cold Semi-Arid (Steppe)

Cool to cold with low rainfall and wide temperature swings. Common in the western Great Plains and central Asia. Short growing seasons benefit from season extension techniques.

Köppen climate map

Temperature

Avg High Avg Temp Avg Low
Temperature table
Average monthly temperatures (°C)
Month Avg High Avg Temp Avg Low
January32°23°14°
February31°23°14°
March27°19°11°
April23°15°7°
May18°11°5°
June14°9°3°
July13°8°2°
August15°9°3°
September19°12°4°
October23°15°6°
November26°18°10°
December29°21°12°

Precipitation

Precipitation table
Average monthly precipitation (millimeters)
MonthPrecipitation
January28
February15
March5
April18
May15
June30
July30
August25
September30
October28
November30
December18

Sunrise / Sunset

Daylight Australian Central Time (ACT) Longest: 14h 11m · Shortest: 9h 49m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Australian Central Time (ACT))
Month Sunrise Sunset Daylight
January6:26 AM8:23 PM13h 57m
February6:54 AM8:05 PM13h 11m
March7:17 AM7:32 PM12h 15m
April6:40 AM5:50 PM11h 10m
May7:02 AM5:20 PM10h 18m
June7:20 AM5:10 PM9h 50m
July7:20 AM5:21 PM10h 01m
August6:56 AM5:42 PM10h 47m
September6:15 AM6:04 PM11h 48m
October6:35 AM7:25 PM12h 51m
November6:08 AM7:52 PM13h 44m
December6:06 AM8:16 PM14h 10m

Nearby Stations

Port Pirie Nyrstar Comparison, SA Clare High School, SA August 29 - May 31 Yunta Airstrip, SA September 12 - May 12 Snowtown (Rayville Park), SA October 3 - May 30 Port Augusta Aero, SA August 7 - June 11 Whyalla Aero, SA August 7 - June 15

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