Frost Dates for Redmond, WA

Based on data from Seattle Sand Pt Wsfo weather station, 6 miles away

Elevation: 43 ft

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. March 8
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. November 23
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 March 16
First Fall Frost November 15

Hard Freeze (28°F)

Last Spring Hard Freeze February 11
First Fall Hard Freeze December 11
47.67°N, -122.12°W © OpenStreetMap

Growing Season

260 Days March 8 to November 23

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 9a

Avg. annual minimum: 20 to 25°F (−7 to −4°C)

Learn more

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

Csb Warm-Summer Mediterranean

Warm, dry summers and mild, wet winters. Similar to hot-summer Mediterranean but cooler. Great for a wide range of vegetables and fruit trees with moderate water needs.

Köppen climate map

Temperature

30° 50° 70°
42°
High: 47°F
Avg: 42°F
Low: 37°F
Jan
43°
High: 50°F
Avg: 43°F
Low: 37°F
Feb
47°
High: 54°F
Avg: 47°F
Low: 39°F
Mar
51°
High: 59°F
Avg: 51°F
Low: 43°F
Apr
57°
High: 65°F
Avg: 57°F
Low: 48°F
May
61°
High: 70°F
Avg: 61°F
Low: 53°F
Jun
67°
High: 77°F
Avg: 67°F
Low: 57°F
Jul
67°
High: 77°F
Avg: 67°F
Low: 57°F
Aug
62°
High: 71°F
Avg: 62°F
Low: 53°F
Sep
54°
High: 61°F
Avg: 54°F
Low: 47°F
Oct
46°
High: 52°F
Avg: 46°F
Low: 41°F
Nov
42°
High: 47°F
Avg: 42°F
Low: 37°F
Dec
32°F
Avg High Avg Temp Avg Low Light Frost (32°F)

Precipitation

0" 2" 4" 4.9"
4.9"
4.91"
Jan
4.0"
3.96"
Feb
4.1"
4.09"
Mar
3.4"
3.36"
Apr
3.3"
3.26"
May
2.5"
2.46"
Jun
2.2"
2.17"
Jul
2.7"
2.70"
Aug
3.3"
3.30"
Sep
4.5"
4.46"
Oct
4.9"
4.91"
Nov
4.7"
4.70"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec8.5h10h11.5h13.5h15h16h15.5h14h12.5h10.5h9h8h
Jan: 7:60 AM – 4:37 PM · 8h 37m
Feb: 7:24 AM – 5:23 PM · 9h 60m
Mar: 7:31 AM – 7:06 PM · 11h 35m
Apr: 6:27 AM – 7:51 PM · 13h 24m
May: 5:37 AM – 8:33 PM · 14h 56m
Jun: 5:16 AM – 9:02 PM · 15h 46m
Jul: 5:32 AM – 8:57 PM · 15h 25m
Aug: 6:11 AM – 8:16 PM · 14h 05m
Sep: 6:54 AM – 7:13 PM · 12h 19m
Oct: 7:37 AM – 6:11 PM · 10h 34m
Nov: 7:24 AM – 4:24 PM · 9h 01m
Dec: 7:58 AM – 4:12 PM · 8h 14m
Daylight Pacific Time (PT) Longest: 15h 48m · Shortest: 8h 12m

Nearby Stations

Seattle Boeing Fld, WA March 13 - November 17 Renton Muni AP, WA March 13 - November 16 Everett Snohomish AP, WA March 9 - November 17 Monroe, WAApril 17 - October 23 Seattle Tacoma Intl AP, WA March 2 - November 23 Kent, WAMarch 20 - November 10

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