Frost Dates for Norseman Aero, WA
Elevation: 263 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 18
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 3
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 29
First Fall Frost
May 26
Hard Freeze (−2°C)
Last Spring Hard Freeze
August 18
First Fall Hard Freeze
June 16
Growing Season
258 Days
September 18 to June 3
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.
BSk
Cold Semi-Arid (Steppe)
Cool to cold with low rainfall and wide temperature swings. Common in the western Great Plains and central Asia. Short growing seasons benefit from season extension techniques.
Temperature
0°
10°
20°
30°
Avg High
Avg Temp
Avg Low
Temperature table
| Month | Avg High | Avg Temp | Avg Low |
|---|---|---|---|
| January | 33° | 24° | 16° |
| February | 32° | 24° | 16° |
| March | 29° | 21° | 14° |
| April | 25° | 18° | 11° |
| May | 21° | 14° | 7° |
| June | 18° | 11° | 5° |
| July | 17° | 11° | 4° |
| August | 19° | 12° | 5° |
| September | 23° | 14° | 6° |
| October | 26° | 18° | 10° |
| November | 29° | 21° | 12° |
| December | 31° | 23° | 14° |
Precipitation
0 mm
10 mm
20 mm
30 mm
40 mm
Precipitation table
| Month | Precipitation |
|---|---|
| January | 33 |
| February | 20 |
| March | 18 |
| April | 13 |
| May | 3 |
| June | 8 |
| July | 13 |
| August | 13 |
| September | 13 |
| October | 13 |
| November | 20 |
| December | 10 |
Sunrise / Sunset
Daylight
Longest: 14h 07m · Shortest: 9h 53m
Sunrise and sunset table
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| January | 5:03 AM | 6:57 PM | 13h 54m |
| February | 5:26 AM | 6:34 PM | 13h 08m |
| March | 5:53 AM | 6:07 PM | 12h 14m |
| April | 6:24 AM | 5:36 PM | 11h 12m |
| May | 6:50 AM | 5:10 PM | 10h 21m |
| June | 7:03 AM | 4:57 PM | 9h 54m |
| July | 6:58 AM | 5:02 PM | 10h 05m |
| August | 6:36 AM | 5:24 PM | 10h 49m |
| September | 6:06 AM | 5:54 PM | 11h 49m |
| October | 5:36 AM | 6:24 PM | 12h 49m |
| November | 5:09 AM | 6:51 PM | 13h 41m |
| December | 4:57 AM | 7:03 PM | 14h 06m |
Nearby Stations
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