Frost Dates for Riley 10 Wsw, OR

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. June 11
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 11
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 June 19
First Fall Frost September 4

Hard Freeze (28°F / -2°C)

Last Spring Hard Freeze May 23
First Fall Hard Freeze September 23
43.47°N, -119.69°W © OpenStreetMap

Growing Season

92 Days June 11 to September 11

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°
27°
High: 37°
Avg: 27°
Low: 17°
Jan
30°
High: 40°
Avg: 30°
Low: 20°
Feb
37°
High: 49°
Avg: 37°
Low: 25°
Mar
41°
High: 55°
Avg: 41°
Low: 27°
Apr
50°
High: 65°
Avg: 50°
Low: 35°
May
58°
High: 74°
Avg: 58°
Low: 42°
Jun
69°
High: 86°
Avg: 69°
Low: 51°
Jul
66°
High: 84°
Avg: 66°
Low: 48°
Aug
57°
High: 75°
Avg: 57°
Low: 40°
Sep
45°
High: 61°
Avg: 45°
Low: 30°
Oct
33°
High: 44°
Avg: 33°
Low: 21°
Nov
25°
High: 35°
Avg: 25°
Low: 16°
Dec
32°F
28°F
Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Precipitation

0" 1" 2" 2.6"
1.9"
1.86"
Jan
1.5"
1.54"
Feb
1.7"
1.70"
Mar
1.8"
1.76"
Apr
2.4"
2.40"
May
2.6"
2.61"
Jun
0.2"
0.20"
Jul
0.0"
0.00"
Aug
1.1"
1.06"
Sep
2.1"
2.07"
Oct
1.8"
1.80"
Nov
1.7"
1.69"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h12h13h15h15h15h14h12h11h9h9h
Jan: 7:27 AM – 4:33 PM · 9h 07m
Feb: 6:52 AM – 5:08 PM · 10h 16m
Mar: 6:11 AM – 5:49 PM · 11h 39m
Apr: 5:24 AM – 6:36 PM · 13h 12m
May: 4:45 AM – 7:15 PM · 14h 31m
Jun: 4:24 AM – 7:36 PM · 15h 13m
Jul: 4:32 AM – 7:28 PM · 14h 56m
Aug: 5:06 AM – 6:54 PM · 13h 48m
Sep: 5:52 AM – 6:08 PM · 12h 17m
Oct: 6:37 AM – 5:23 PM · 10h 46m
Nov: 7:17 AM – 4:43 PM · 9h 26m
Dec: 7:37 AM – 4:23 PM · 8h 47m
Daylight Longest: 15h 14m · Shortest: 8h 46m

Nearby Stations

Squaw Butte-Northern Great Bas, OR June 11 - September 28 O O Rch, ORJune 11 - September 6 Burns Muni AP, OR June 11 - September 6 Alkali Lake, OR June 10 - September 14 Barnes Stn, OR June 2 - September 17 Malheur Refuge Hq, OR May 29 - September 18

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