Frost Dates for Mount Helen, VIC

Based on data from Ballarat Aerodrome weather station, 9 miles away

Elevation: 487 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 16
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 7

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 30
First Fall Frost April 28

Hard Freeze (−2°C)

Last Spring Hard Freeze August 23
First Fall Hard Freeze May 27
37.62°S, 143.88°E © OpenStreetMap

Growing Season

203 Days October 16 to May 7

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 9b

Avg. annual minimum: −4 to −1°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
January26°19°12°
February26°19°12°
March23°16°10°
April18°13°7°
May14°10°5°
June11°7°4°
July11°7°3°
August12°8°3°
September14°9°4°
October17°12°6°
November20°14°8°
December23°16°9°

Precipitation

Precipitation table
Average monthly precipitation (millimeters)
MonthPrecipitation
January46
February38
March23
April43
May56
June69
July74
August74
September64
October61
November53
December43

Sunrise / Sunset

Daylight Australian Eastern Time (AET) Longest: 14h 36m · Shortest: 9h 24m
Sunrise and sunset table
Sunrise, sunset, and daylight on the 15th of each month (Australian Eastern Time (AET))
Month Sunrise Sunset Daylight
January6:25 AM8:44 PM14h 19m
February6:58 AM8:21 PM13h 24m
March7:26 AM7:43 PM12h 17m
April6:54 AM5:56 PM11h 01m
May7:22 AM5:21 PM9h 59m
June7:42 AM5:08 PM9h 25m
July7:41 AM5:20 PM9h 39m
August7:12 AM5:46 PM10h 33m
September6:26 AM6:13 PM11h 46m
October6:40 AM7:40 PM12h 60m
November6:08 AM8:12 PM14h 04m
December6:03 AM8:38 PM14h 35m

Nearby Stations

Maryborough, VIC September 3 - June 4 Sheoaks, VICSeptember 13 - May 28 Castlemaine Prison, VIC October 3 - May 9 Ararat Prison, VIC October 26 - April 28 Colac (Mount Gellibrand), VIC Avalon Airport, VIC August 14 - June 15

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