Frost Dates for Brownsville, OR

Based on data from Lebanon weather station, 10 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. March 14
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 18
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 25
First Fall Frost November 7

Hard Freeze (28°F)

Last Spring Hard Freeze February 15
First Fall Hard Freeze December 10
44.39°N, -122.98°W © OpenStreetMap

Growing Season

249 Days March 14 to November 18

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 8b

Avg. annual minimum: 15 to 20°F (−9 to −7°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° 90°
43°
High: 49°F
Avg: 43°F
Low: 37°F
Jan
45°
High: 53°F
Avg: 45°F
Low: 37°F
Feb
48°
High: 58°F
Avg: 48°F
Low: 39°F
Mar
52°
High: 62°F
Avg: 52°F
Low: 42°F
Apr
58°
High: 69°F
Avg: 58°F
Low: 47°F
May
64°
High: 76°F
Avg: 64°F
Low: 52°F
Jun
70°
High: 85°F
Avg: 70°F
Low: 55°F
Jul
71°
High: 86°F
Avg: 71°F
Low: 56°F
Aug
65°
High: 79°F
Avg: 65°F
Low: 51°F
Sep
55°
High: 65°F
Avg: 55°F
Low: 45°F
Oct
47°
High: 54°F
Avg: 47°F
Low: 40°F
Nov
42°
High: 47°F
Avg: 42°F
Low: 36°F
Dec
32°F
Avg High Avg Temp Avg Low Light Frost (32°F)

Precipitation

0" 3" 6" 9" 9.4"
8.5"
8.54"
Jan
7.0"
6.97"
Feb
8.4"
8.45"
Mar
7.1"
7.08"
Apr
6.7"
6.66"
May
5.3"
5.32"
Jun
2.1"
2.08"
Jul
2.5"
2.46"
Aug
5.9"
5.86"
Sep
7.4"
7.43"
Oct
8.6"
8.64"
Nov
9.4"
9.42"
Dec

Sunrise / Sunset

4a7a10a1p4p7p10pNoonJanFebMarAprMayJunJulAugSepOctNovDec9h10h11.5h13.5h14.5h15.5h15h14h12.5h10.5h9.5h8.5h
Jan: 7:30 AM – 4:30 PM · 8h 60m
Feb: 6:54 AM – 5:06 PM · 10h 13m
Mar: 6:11 AM – 5:49 PM · 11h 38m
Apr: 5:22 AM – 6:38 PM · 13h 15m
May: 4:42 AM – 7:18 PM · 14h 36m
Jun: 4:20 AM – 7:40 PM · 15h 21m
Jul: 4:29 AM – 7:31 PM · 15h 03m
Aug: 5:04 AM – 6:56 PM · 13h 52m
Sep: 5:51 AM – 6:09 PM · 12h 17m
Oct: 6:38 AM – 5:22 PM · 10h 43m
Nov: 7:20 AM – 4:40 PM · 9h 20m
Dec: 7:40 AM – 4:20 PM · 8h 39m
Daylight Longest: 15h 22m · Shortest: 8h 38m

Nearby Stations

Lacomb 3 Nne, OR April 26 - October 24 Foster Dam, OR April 12 - October 28 Corvallis State Univ, OR April 17 - October 28 Stayton, ORMarch 29 - November 6 Corvallis 10 Ssw, OR April 11 - October 30 Cascadia, ORApril 29 - October 13

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