Frost Dates for Southern Cross Airfield, WA
Elevation: 347 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.
September 12
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 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
September 23
First Fall Frost
May 31
Hard Freeze (−2°C)
Last Spring Hard Freeze
August 21
First Fall Hard Freeze
June 19
Growing Season
268 Days
September 12 to June 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
Köppen Climate
The 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.
Temperature
0°
10°
20°
30°
Avg High
Avg Temp
Avg Low
Temperature table
| Month | Avg High | Avg Temp | Avg Low |
|---|---|---|---|
| January | 35° | 26° | 18° |
| February | 34° | 26° | 18° |
| March | 30° | 23° | 15° |
| April | 26° | 19° | 12° |
| May | 21° | 14° | 7° |
| June | 18° | 11° | 5° |
| July | 17° | 10° | 4° |
| August | 19° | 11° | 4° |
| September | 22° | 14° | 5° |
| October | 27° | 18° | 10° |
| November | 30° | 22° | 13° |
| December | 33° | 24° | 16° |
Precipitation
0 mm
10 mm
20 mm
30 mm
40 mm
Precipitation table
| Month | Precipitation |
|---|---|
| January | 25 |
| February | 23 |
| March | 30 |
| April | 13 |
| May | 25 |
| June | 15 |
| July | 28 |
| August | 20 |
| September | 8 |
| October | 10 |
| November | 8 |
| December | 10 |
Sunrise / Sunset
Daylight
Longest: 14h 02m · Shortest: 9h 58m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 5:05 AM | 6:55 PM | 13h 49m |
| February | 5:27 AM | 6:33 PM | 13h 06m |
| March | 5:53 AM | 6:07 PM | 12h 14m |
| April | 6:23 AM | 5:37 PM | 11h 14m |
| May | 6:48 AM | 5:12 PM | 10h 25m |
| June | 7:01 AM | 4:59 PM | 9h 59m |
| July | 6:55 AM | 5:05 PM | 10h 09m |
| August | 6:34 AM | 5:26 PM | 10h 52m |
| September | 6:05 AM | 5:55 PM | 11h 49m |
| October | 5:36 AM | 6:24 PM | 12h 47m |
| November | 5:11 AM | 6:49 PM | 13h 37m |
| December | 4:59 AM | 7:01 PM | 14h 01m |
Nearby Stations
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