Frost Dates for Southern Cross Airfield, WA

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. September 12
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. June 7
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 September 23
First Fall Frost May 31

Hard Freeze (−2°C)

Last Spring Hard Freeze August 21
First Fall Hard Freeze June 19
-31.24°N, 119.36°W © OpenStreetMap

Growing Season

268 Days September 12 to June 7

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 9b

Avg. annual minimum: 25 to 30°F (−4 to −1°C)

Learn more

Köppen Climate iThe Köppen climate classification system categorizes climates based on temperature and precipitation patterns.

BSh Hot Semi-Arid (Steppe)

Hot with low but not negligible rainfall. Less extreme than true desert. Dryland farming techniques and drought-tolerant varieties work well. Mulching and water conservation are key.

Köppen climate map

Temperature

0° 10° 20° 30°
26°
High: 35°C
Avg: 26°C
Low: 18°C
Jan
26°
High: 34°C
Avg: 26°C
Low: 18°C
Feb
23°
High: 30°C
Avg: 23°C
Low: 15°C
Mar
19°
High: 26°C
Avg: 19°C
Low: 12°C
Apr
14°
High: 21°C
Avg: 14°C
Low: 7°C
May
11°
High: 18°C
Avg: 11°C
Low: 5°C
Jun
10°
High: 17°C
Avg: 10°C
Low: 4°C
Jul
11°
High: 19°C
Avg: 11°C
Low: 4°C
Aug
14°
High: 22°C
Avg: 14°C
Low: 5°C
Sep
18°
High: 27°C
Avg: 18°C
Low: 10°C
Oct
22°
High: 30°C
Avg: 22°C
Low: 13°C
Nov
24°
High: 33°C
Avg: 24°C
Low: 16°C
Dec
Avg High Avg Temp Avg Low

Precipitation

0 mm 10 mm 20 mm 30 mm 40 mm
25 mm
25.4 mm
Jan
23 mm
22.9 mm
Feb
30 mm
30.5 mm
Mar
13 mm
12.7 mm
Apr
25 mm
25.4 mm
May
15 mm
15.2 mm
Jun
28 mm
27.9 mm
Jul
20 mm
20.3 mm
Aug
8 mm
7.6 mm
Sep
10 mm
10.2 mm
Oct
8 mm
7.6 mm
Nov
10 mm
10.2 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec14h13h12h11h10.5h10h10h11h12h13h13.5h14h
Jan: 5:05 AM – 6:55 PM · 13h 49m
Feb: 5:27 AM – 6:33 PM · 13h 06m
Mar: 5:53 AM – 6:07 PM · 12h 14m
Apr: 6:23 AM – 5:37 PM · 11h 14m
May: 6:48 AM – 5:12 PM · 10h 25m
Jun: 7:01 AM – 4:59 PM · 9h 59m
Jul: 6:55 AM – 5:05 PM · 10h 09m
Aug: 6:34 AM – 5:26 PM · 10h 52m
Sep: 6:05 AM – 5:55 PM · 11h 49m
Oct: 5:36 AM – 6:24 PM · 12h 47m
Nov: 5:11 AM – 6:49 PM · 13h 37m
Dec: 4:59 AM – 7:01 PM · 14h 01m
Daylight Longest: 14h 02m · Shortest: 9h 58m

Nearby Stations

Merredin, WAAugust 28 - June 8 Narembeen, WAAugust 23 - June 10 Hyden, WASeptember 6 - June 5

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