Frost Dates for Portland, Australia

Based on data from Bathurst Airport Aws weather station, 19 miles away

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. October 9
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. April 30
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 October 16
First Fall Frost April 19

Hard Freeze (−2°C)

Last Spring Hard Freeze September 5
First Fall Hard Freeze May 16
-33.36°N, 149.98°W © OpenStreetMap

Growing Season

203 Days October 9 to April 30

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 9a

Avg. annual minimum: 20 to 25°F (−7 to −4°C)

Learn more

Köppen Climate iThe 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

0° 10° 20° 30°
22°
High: 29°C
Avg: 22°C
Low: 14°C
Jan
21°
High: 28°C
Avg: 21°C
Low: 14°C
Feb
18°
High: 25°C
Avg: 18°C
Low: 11°C
Mar
14°
High: 21°C
Avg: 14°C
Low: 7°C
Apr
10°
High: 16°C
Avg: 10°C
Low: 3°C
May
7°
High: 13°C
Avg: 7°C
Low: 2°C
Jun
6°
High: 12°C
Avg: 6°C
Low: 1°C
Jul
7°
High: 14°C
Avg: 7°C
Low: 1°C
Aug
10°
High: 17°C
Avg: 10°C
Low: 4°C
Sep
13°
High: 21°C
Avg: 13°C
Low: 6°C
Oct
17°
High: 24°C
Avg: 17°C
Low: 9°C
Nov
19°
High: 27°C
Avg: 19°C
Low: 12°C
Dec
Avg High Avg Temp Avg Low

Precipitation

0 mm 30 mm 60 mm 90 mm
61 mm
61.0 mm
Jan
64 mm
63.5 mm
Feb
61 mm
61.0 mm
Mar
28 mm
27.9 mm
Apr
30 mm
30.5 mm
May
36 mm
35.6 mm
Jun
36 mm
35.6 mm
Jul
38 mm
38.1 mm
Aug
48 mm
48.3 mm
Sep
51 mm
50.8 mm
Oct
74 mm
73.7 mm
Nov
81 mm
81.3 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec14h13h12h11h10.5h10h10h11h12h13h14h14h
Jan: 5:00 AM – 6:60 PM · 13h 59m
Feb: 5:24 AM – 6:36 PM · 13h 12m
Mar: 5:53 AM – 6:07 PM · 12h 15m
Apr: 6:25 AM – 5:35 PM · 11h 10m
May: 6:52 AM – 5:08 PM · 10h 16m
Jun: 7:06 AM – 4:54 PM · 9h 48m
Jul: 7:00 AM – 4:60 PM · 9h 59m
Aug: 6:37 AM – 5:23 PM · 10h 45m
Sep: 6:06 AM – 5:54 PM · 11h 48m
Oct: 5:34 AM – 6:26 PM · 12h 51m
Nov: 5:07 AM – 6:53 PM · 13h 46m
Dec: 4:54 AM – 7:06 PM · 14h 12m
Daylight Longest: 14h 13m · Shortest: 9h 47m

Nearby Stations

Bathurst Agricultural Station, Australia October 13 - April 29 Orange Airport Aws, Australia October 20 - April 24 Orange Airport Comparison, Australia October 20 - April 29 Orange Agricultural Institute, Australia October 4 - May 18 Mount Boyce Aws, Australia September 17 - May 28 Katoomba (Murri St), Australia September 8 - June 5

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