Womens Bay climate

Womens Bay Frost Dates and Growing Season

NOAA 1991-2020 normals for Kodiak AP, 13.3 km from Womens Bay, elevation 80 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Kodiak AP. A median date has an even chance of a later freeze in spring, or an earlier one in fall.

The last spring freeze typically comes around May 5 and the first fall freeze around October 3, a growing season of about 151 days.

Median at 36°F
last May 26, first September 21
Median at 32°F
last May 5, first October 3
Median at 28°F
last April 18, first October 17

Last freeze in spring

The chance of a later freeze than the date shown. At 10 percent, one spring in ten still freezes after the date; planting after the 10 percent date for 32°F is the cautious choice.

Threshold10%20%30%40%50%60%70%80%90%
36°FJun 9Jun 3Jun 1May 29May 26May 23May 20May 16May 10
32°FMay 21May 16May 12May 8May 5May 2Apr 30Apr 25Apr 19
28°FMay 3Apr 28Apr 24Apr 21Apr 18Apr 14Apr 11Apr 8Apr 4
24°FApr 20Apr 14Apr 10Apr 7Apr 4Apr 2Mar 31Mar 26Mar 19
20°FApr 7Apr 2Mar 31Mar 28Mar 25Mar 21Mar 16Mar 10Feb 28
16°FMar 31Mar 26Mar 20Mar 15Mar 9Mar 3Feb 25Feb 12Jan 29

First freeze in fall

The chance of an earlier freeze than the date shown. At 10 percent, one fall in ten freezes before the date.

Threshold10%20%30%40%50%60%70%80%90%
36°FSep 8Sep 13Sep 16Sep 19Sep 21Sep 24Sep 26Sep 29Oct 2
32°FSep 22Sep 26Sep 29Oct 1Oct 3Oct 5Oct 8Oct 12Oct 17
28°FOct 1Oct 5Oct 9Oct 13Oct 17Oct 21Oct 25Oct 30Nov 5
24°FOct 16Oct 23Oct 28Nov 1Nov 3Nov 7Nov 12Nov 17Nov 23
20°FNov 1Nov 4Nov 10Nov 15Nov 19Nov 23Nov 27Dec 1Dec 8
16°FNov 11Nov 21Nov 26Dec 1Dec 4Dec 9Dec 14Dec 21Jan 1

Growing season length

Days between the last spring and first fall freeze at each threshold, with the chance of a season at least that long.

Threshold10%20%30%40%50%60%70%80%90%
36°F13713112612211811411010598
32°F171164160156151147142137131
28°F206198193189185180175170162
24°F235227221216212208203198189
20°F271260252245239235230222215
16°F308295285277270264258249240

How often it gets that cold

The share of years with at least one night at or below each temperature.

36°F or colder
100% of years
32°F or colder
100% of years
28°F or colder
100% of years
24°F or colder
100% of years
20°F or colder
100% of years
16°F or colder
100% of years

Degree days

A degree day is one degree of the daily mean temperature beyond a base, for one day. Heating degree days count cold (the fuel a house burns), cooling degree days heat, growing degree days the warmth a crop needs; each crop has its own base.

Heating degree days, base 65°F
8,316
Cooling degree days, base 65°F
7
Growing degree days, base 40°F
2,048
Growing degree days, base 45°F
1,175
Growing degree days, base 50°F
551
Growing degree days, base 55°F
176
Growing degree days, base 60°F
38

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,04900
February91400
March98600
April77601
May595015
June410172
July2773192
August2653204
September431064
October70803
November87900
December1,02600

What this means

NOAA computes these from the daily lows at the station over 1991-2020, fitting the dates of each year's last and first freeze to a distribution, so a date can be stated at any level of risk. 36°F is a frost risk for tender plants on a clear, calm night, since the ground cools below the air above it; 32°F is a freeze; 28°F is a hard freeze that kills most annuals.

The station is 13.3 km from Womens Bay. Low ground, valleys and open fields freeze earlier and later than a town center or a hillside.

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Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal normals for station USW00025501 (Kodiak AP). Public domain.