Frost Dates for Roxby Downs (Olympic Dam Aerod, SA

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. August 10
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 5
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 August 19
First Fall Frost May 28

Hard Freeze (−2°C)

Last Spring Hard Freeze July 27
First Fall Hard Freeze June 14
-30.48°N, 136.88°W © OpenStreetMap

Growing Season

299 Days August 10 to June 5

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.

BWh Hot Desert

Very hot and extremely dry with minimal rainfall. Irrigation is essential for any gardening. Heat-tolerant crops and desert-adapted plants thrive; shade structures help in peak summer.

Köppen climate map

Temperature

0° 10° 20° 30° 40°
29°
High: 37°C
Avg: 29°C
Low: 21°C
Jan
28°
High: 36°C
Avg: 28°C
Low: 20°C
Feb
25°
High: 32°C
Avg: 25°C
Low: 17°C
Mar
20°
High: 27°C
Avg: 20°C
Low: 13°C
Apr
15°
High: 22°C
Avg: 15°C
Low: 8°C
May
12°
High: 19°C
Avg: 12°C
Low: 5°C
Jun
11°
High: 19°C
Avg: 11°C
Low: 4°C
Jul
13°
High: 21°C
Avg: 13°C
Low: 5°C
Aug
17°
High: 25°C
Avg: 17°C
Low: 9°C
Sep
21°
High: 29°C
Avg: 21°C
Low: 13°C
Oct
24°
High: 32°C
Avg: 24°C
Low: 16°C
Nov
27°
High: 35°C
Avg: 27°C
Low: 19°C
Dec
Avg High Avg Temp Avg Low

Precipitation

0 mm 10 mm 20 mm
3 mm
2.5 mm
Jan
13 mm
12.7 mm
Feb
3 mm
2.5 mm
Mar
8 mm
7.6 mm
Apr
0 mm
0.0 mm
May
8 mm
7.6 mm
Jun
0 mm
0.0 mm
Jul
0 mm
0.0 mm
Aug
0 mm
0.0 mm
Sep
5 mm
5.1 mm
Oct
5 mm
5.1 mm
Nov
10 mm
10.2 mm
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec14h13h12h11.5h10.5h10h10h11h12h13h13.5h14h
Jan: 5:07 AM – 6:53 PM · 13h 46m
Feb: 5:28 AM – 6:32 PM · 13h 04m
Mar: 5:53 AM – 6:07 PM · 12h 13m
Apr: 6:22 AM – 5:38 PM · 11h 15m
May: 6:46 AM – 5:14 PM · 10h 28m
Jun: 6:59 AM – 5:01 PM · 10h 02m
Jul: 6:54 AM – 5:06 PM · 10h 13m
Aug: 6:33 AM – 5:27 PM · 10h 54m
Sep: 6:05 AM – 5:55 PM · 11h 50m
Oct: 5:37 AM – 6:23 PM · 12h 46m
Nov: 5:13 AM – 6:47 PM · 13h 34m
Dec: 5:01 AM – 6:59 PM · 13h 58m
Daylight Longest: 13h 58m · Shortest: 10h 02m

Nearby Stations

Andamooka, SA Woomera Aerodrome, SA

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