Frost Dates for St Helens, TAS

Based on data from St Helens Aerodrome weather station, 2 miles away

Elevation: 3 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. August 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. June 17

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 August 24
First Fall Frost June 10
41.32°S, 148.24°E © OpenStreetMap

Growing Season

306 Days August 15 to June 17

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 10a

Avg. annual minimum: −1 to 2°C

Learn more

Köppen Climate

The Köppen climate classification system categorizes climates based on temperature and precipitation patterns.
Cfb Oceanic (Marine West Coast)

Mild year-round with cool summers and wet winters. Excellent for cool-season crops like brassicas, peas, and root vegetables. Extended harvest seasons but summer heat-loving crops may struggle.

Köppen climate map

Temperature

Avg High Avg Temp Avg Low
Temperature table
Average monthly temperatures (°C)
Month Avg High Avg Temp Avg Low
January23°18°13°
February22°18°13°
March21°16°12°
April19°14°10°
May16°12°7°
June14°10°5°
July14°9°5°
August14°10°5°
September16°11°7°
October18°13°8°
November20°15°10°
December21°17°12°

Precipitation

Precipitation table
Average monthly precipitation (millimeters)
MonthPrecipitation
January48
February58
March58
April33
May43
June64
July48
August53
September46
October64
November76
December58

Sunrise / Sunset

Daylight Australian Eastern Time (AET) Longest: 14h 59m · Shortest: 9h 01m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Australian Eastern Time (AET))
Month Sunrise Sunset Daylight
January5:56 AM8:36 PM14h 40m
February6:33 AM8:09 PM13h 36m
March7:07 AM7:26 PM12h 20m
April6:41 AM5:34 PM10h 53m
May7:13 AM4:53 PM9h 41m
June7:36 AM4:38 PM9h 02m
July7:34 AM4:51 PM9h 18m
August7:01 AM5:21 PM10h 20m
September6:09 AM5:54 PM11h 44m
October6:18 AM7:26 PM13h 08m
November5:41 AM8:03 PM14h 22m
December5:33 AM8:32 PM14h 58m

Nearby Stations

Eddystone Point, TAS Fingal (Legge Street), TAS November 3 - April 8 Bicheno (Council Depot), TAS Scottsdale (West Minstone Road, TAS September 25 - May 24 Swan Island, TAS Friendly Beaches, TAS August 1 - June 7

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