Frost Dates for Mazama, 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. May 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. September 29
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 May 14
First Fall Frost September 24

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze April 25
First Fall Hard Freeze October 10
48.60°N, -120.43°W © OpenStreetMap

Growing Season

143 Days May 9 to September 29

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 5b

Learn more

Temperature

10° 30° 50° 70° 90°
23°
High: 29°
Avg: 23°
Low: 16°
Jan
28°
High: 37°
Avg: 28°
Low: 19°
Feb
36°
High: 46°
Avg: 36°
Low: 26°
Mar
45°
High: 58°
Avg: 45°
Low: 33°
Apr
55°
High: 68°
Avg: 55°
Low: 41°
May
62°
High: 75°
Avg: 62°
Low: 48°
Jun
70°
High: 85°
Avg: 70°
Low: 55°
Jul
69°
High: 84°
Avg: 69°
Low: 53°
Aug
60°
High: 74°
Avg: 60°
Low: 45°
Sep
45°
High: 57°
Avg: 45°
Low: 34°
Oct
32°
High: 39°
Avg: 32°
Low: 25°
Nov
22°
High: 28°
Avg: 22°
Low: 16°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 2" 4" 4.6"
4.4"
4.39"
Jan
3.4"
3.39"
Feb
3.5"
3.52"
Mar
2.2"
2.20"
Apr
2.0"
2.01"
May
2.4"
2.38"
Jun
2.2"
2.17"
Jul
1.8"
1.82"
Aug
1.6"
1.59"
Sep
3.1"
3.12"
Oct
3.8"
3.79"
Nov
4.6"
4.63"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h16h16h14h12h11h9h8h
Jan: 7:45 AM – 4:15 PM · 8h 30m
Feb: 7:02 AM – 4:58 PM · 9h 56m
Mar: 6:13 AM – 5:47 PM · 11h 34m
Apr: 5:17 AM – 6:43 PM · 13h 27m
May: 4:29 AM – 7:31 PM · 15h 02m
Jun: 4:03 AM – 7:57 PM · 15h 54m
Jul: 4:14 AM – 7:46 PM · 15h 33m
Aug: 4:55 AM – 7:05 PM · 14h 09m
Sep: 5:50 AM – 6:10 PM · 12h 20m
Oct: 6:44 AM – 5:16 PM · 10h 32m
Nov: 7:33 AM – 4:27 PM · 8h 54m
Dec: 7:57 AM – 4:03 PM · 8h 06m
Daylight Longest: 15h 56m · Shortest: 8h 04m

Nearby Stations

Winthrop 1 Wsw, WA May 15 - September 22 Stehekin 4 Nw, WA April 27 - October 17 Ross Dam, WAApril 8 - November 10 Holden Village, WA May 25 - September 19 Diablo Dam, WA April 10 - November 1 Newhalem, WAApril 2 - November 14

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