Frost Dates for Westfall, OR

Elevation: 927 m

Frost Dates

Last Spring Frost (50%) May 7

First Fall Frost (50%) October 3

30% Probability

Last Spring Frost May 13

First Fall Frost September 28

Hard Freeze (28°F)

Last Spring Hard Freeze April 24

First Fall Hard Freeze October 13

43.99°N, 117.72°W © OpenStreetMap

Growing Season

149 Days May 7 to October 3

USDA Hardiness Zone

Zone 6b

Avg. annual minimum: −5 to 0°F

Learn more

Köppen Climate

BSk Cold Semi-Arid (Steppe)

Cool to cold with low rainfall and wide temperature swings. Common in the western Great Plains and central Asia. Short growing seasons benefit from season extension techniques.

Köppen climate map

Temperature

20° 40° 60° 80° 100°

30°

Jan

35°

Feb

43°

Mar

49°

Apr

58°

May

65°

Jun

75°

Jul

73°

Aug

63°

Sep

50°

Oct

37°

Nov

30°

Dec

32°F

28°F

Avg High Avg Temp Avg Low Light Frost (32°F) Hard Frost (28°F)

Temperature table

Average monthly temperatures (°F)
Month	Avg High	Avg Temp	Avg Low
January	38°	30°	21°
February	45°	35°	24°
March	56°	43°	30°
April	64°	49°	34°
May	73°	58°	43°
June	81°	65°	50°
July	92°	75°	57°
August	90°	73°	55°
September	80°	63°	45°
October	65°	50°	34°
November	48°	37°	26°
December	38°	30°	21°

Precipitation

0" 1" 2" 3" 3.0"

2.6"

Jan

2.5"

Feb

2.1"

Mar

1.9"

Apr

2.4"

May

2.0"

Jun

0.7"

Jul

0.0"

Aug

1.2"

Sep

3.0"

Oct

2.0"

Nov

2.6"

Dec

Precipitation table

Average monthly precipitation (inches)
Month	Precipitation
January	2.6
February	2.5
March	2.1
April	1.9
May	2.4
June	2.0
July	0.7
August	0.0
September	1.2
October	3.0
November	2.0
December	2.6

Sunrise / Sunset

Jan: 7:28 AM – 4:32 PM · 9h 03m

Feb: 6:53 AM – 5:07 PM · 10h 15m

Mar: 6:11 AM – 5:49 PM · 11h 38m

Apr: 5:23 AM – 6:37 PM · 13h 14m

May: 4:43 AM – 7:17 PM · 14h 33m

Jun: 4:22 AM – 7:38 PM · 15h 17m

Jul: 4:31 AM – 7:29 PM · 14h 59m

Aug: 5:05 AM – 6:55 PM · 13h 50m

Sep: 5:51 AM – 6:09 PM · 12h 17m

Oct: 6:38 AM – 5:22 PM · 10h 45m

Nov: 7:18 AM – 4:42 PM · 9h 23m

Dec: 7:38 AM – 4:22 PM · 8h 43m

Daylight Longest: 15h 18m · Shortest: 8h 42m

Sunrise and sunset table

Sunrise, sunset, and daylight on the 15th of each month (local solar time)
Month	Sunrise	Sunset	Daylight
January	7:28 AM	4:32 PM	9h 03m
February	6:53 AM	5:07 PM	10h 15m
March	6:11 AM	5:49 PM	11h 38m
April	5:23 AM	6:37 PM	13h 14m
May	4:43 AM	7:17 PM	14h 33m
June	4:22 AM	7:38 PM	15h 17m
July	4:31 AM	7:29 PM	14h 59m
August	5:05 AM	6:55 PM	13h 50m
September	5:51 AM	6:09 PM	12h 17m
October	6:38 AM	5:22 PM	10h 45m
November	7:18 AM	4:42 PM	9h 23m
December	7:38 AM	4:22 PM	8h 43m

Nearby Stations

Vale, ORMay 8 - September 29 Owyhee Dam, ORMay 7 - October 5 Huntington, OR April 23 - October 13 Malheur Branch Exp Stn, OR April 23 - October 13 Ontario Muni AP, OR April 21 - October 14 Drewsey, ORJune 5 - September 5

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