Frost Dates for Whitman Mission, WA

Elevation: 193 m

Frost Dates

Last Spring Frost (50%) May 2

First Fall Frost (50%) October 1

30% Probability

Last Spring Frost May 8

First Fall Frost September 25

Hard Freeze (28°F)

Last Spring Hard Freeze April 15

First Fall Hard Freeze October 12

46.04°N, 118.46°W © OpenStreetMap

Growing Season

152 Days May 2 to October 1

USDA Hardiness Zone

Zone 7a

Avg. annual minimum: 0 to 5°F

Learn more

Köppen Climate

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°

35°

Jan

38°

Feb

45°

Mar

51°

Apr

58°

May

65°

Jun

72°

Jul

71°

Aug

62°

Sep

51°

Oct

41°

Nov

34°

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	42°	35°	27°
February	48°	38°	28°
March	57°	45°	32°
April	65°	51°	37°
May	73°	58°	44°
June	80°	65°	49°
July	90°	72°	54°
August	90°	71°	52°
September	80°	62°	44°
October	66°	51°	36°
November	50°	41°	31°
December	41°	34°	27°

Precipitation

0" 1" 2" 3" 3.9"

3.3"

Jan

2.7"

Feb

3.0"

Mar

3.3"

Apr

3.9"

May

3.7"

Jun

0.0"

Jul

0.0"

Aug

1.5"

Sep

3.3"

Oct

3.3"

Nov

3.5"

Dec

Precipitation table

Average monthly precipitation (inches)
Month	Precipitation
January	3.3
February	2.7
March	3.0
April	3.3
May	3.9
June	3.7
July	0.0
August	0.0
September	1.5
October	3.3
November	3.3
December	3.5

Sunrise / Sunset

Jan: 7:38 AM – 4:28 PM · 8h 50m

Feb: 7:05 AM – 5:12 PM · 10h 07m

Mar: 7:15 AM – 6:52 PM · 11h 37m

Apr: 6:14 AM – 7:34 PM · 13h 19m

May: 5:27 AM – 8:13 PM · 14h 45m

Jun: 5:08 AM – 8:40 PM · 15h 32m

Jul: 5:23 AM – 8:36 PM · 15h 13m

Aug: 5:59 AM – 7:57 PM · 13h 58m

Sep: 6:39 AM – 6:58 PM · 12h 18m

Oct: 7:19 AM – 5:59 PM · 10h 39m

Nov: 7:03 AM – 4:15 PM · 9h 11m

Dec: 7:36 AM – 4:03 PM · 8h 27m

Daylight Pacific Time (PT) Longest: 15h 34m · Shortest: 8h 26m

Sunrise and sunset table

Sunrise, sunset, and daylight on the 15th of each month (Pacific Time (PT))
Month	Sunrise	Sunset	Daylight
January	7:38 AM	4:28 PM	8h 50m
February	7:05 AM	5:12 PM	10h 07m
March	7:15 AM	6:52 PM	11h 37m
April	6:14 AM	7:34 PM	13h 19m
May	5:27 AM	8:13 PM	14h 45m
June	5:08 AM	8:40 PM	15h 32m
July	5:23 AM	8:36 PM	15h 13m
August	5:59 AM	7:57 PM	13h 58m
September	6:39 AM	6:58 PM	12h 18m
October	7:19 AM	5:59 PM	10h 39m
November	7:03 AM	4:15 PM	9h 11m
December	7:36 AM	4:03 PM	8h 27m

Nearby Stations

Milton Freewater, OR March 25 - October 29 Walla Walla Rgnl AP, WA March 27 - October 31 Pendleton Branch Exp Stn, OR May 12 - September 27 Ice Harbor Dam, WA April 7 - October 22 Dayton 1 Wsw, WA April 28 - October 13 Pendleton Dwtn, OR April 22 - October 9

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