Frost Dates for Pilot Rock, OR

Based on data from Pilot Rock 1 Se weather station, 1 miles away

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 7
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. October 4
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 15
First Fall Frost September 28

Hard Freeze (28°F)

Last Spring Hard Freeze April 21
First Fall Hard Freeze October 15
45.48°N, -118.83°W © OpenStreetMap

Growing Season

150 Days May 7 to October 4

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 7a

Avg. annual minimum: 0 to 5°F (−18 to −15°C)

Learn more

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

Csa Hot-Summer Mediterranean

Hot, dry summers and mild, wet winters. Classic Mediterranean climate ideal for grapes, olives, tomatoes, and herbs. Summer irrigation is usually necessary.

Köppen climate map

Temperature

20° 40° 60° 80° 100°
36°
High: 45°F
Avg: 36°F
Low: 26°F
Jan
38°
High: 49°F
Avg: 38°F
Low: 27°F
Feb
44°
High: 57°F
Avg: 44°F
Low: 32°F
Mar
50°
High: 63°F
Avg: 50°F
Low: 36°F
Apr
57°
High: 72°F
Avg: 57°F
Low: 43°F
May
64°
High: 80°F
Avg: 64°F
Low: 48°F
Jun
72°
High: 91°F
Avg: 72°F
Low: 53°F
Jul
71°
High: 90°F
Avg: 71°F
Low: 52°F
Aug
63°
High: 80°F
Avg: 63°F
Low: 45°F
Sep
52°
High: 67°F
Avg: 52°F
Low: 37°F
Oct
41°
High: 53°F
Avg: 41°F
Low: 30°F
Nov
35°
High: 44°F
Avg: 35°F
Low: 26°F
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 3" 3.8"
2.9"
2.86"
Jan
2.8"
2.80"
Feb
3.1"
3.10"
Mar
3.1"
3.07"
Apr
3.8"
3.77"
May
3.3"
3.28"
Jun
0.9"
0.90"
Jul
0.0"
0.00"
Aug
2.8"
2.79"
Sep
2.8"
2.84"
Oct
2.7"
2.70"
Nov
2.8"
2.79"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h14.5h15.5h15h14h12.5h10.5h9h8.5h
Jan: 7:33 AM – 4:27 PM · 8h 53m
Feb: 6:56 AM – 5:04 PM · 10h 09m
Mar: 6:11 AM – 5:49 PM · 11h 37m
Apr: 5:21 AM – 6:39 PM · 13h 18m
May: 4:39 AM – 7:21 PM · 14h 42m
Jun: 4:16 AM – 7:44 PM · 15h 28m
Jul: 4:25 AM – 7:35 PM · 15h 09m
Aug: 5:02 AM – 6:58 PM · 13h 56m
Sep: 5:51 AM – 6:09 PM · 12h 18m
Oct: 6:40 AM – 5:20 PM · 10h 41m
Nov: 7:23 AM – 4:37 PM · 9h 15m
Dec: 7:44 AM – 4:16 PM · 8h 32m
Daylight Longest: 15h 29m · Shortest: 8h 31m

Nearby Stations

Pendleton Dwtn, OR April 22 - October 9 Pendleton, OR April 26 - October 16 Pendleton Wfo, OR April 14 - October 22 Pendleton Branch Exp Stn, OR May 12 - September 27 Meacham, OR Hermiston Muni AP, OR April 26 - October 10

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