Emily climate

Emily Frost Dates and Growing Season

NOAA 1991-2020 normals for Pine Rvr Dam, 13.4 km from Emily, elevation 1250 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Pine Rvr Dam. 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 6 and the first fall freeze around October 7, a growing season of about 152 days.

Median at 36°F
last May 16, first September 27
Median at 32°F
last May 6, first October 7
Median at 28°F
last April 29, first October 18

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°FMay 29May 25May 22May 19May 16May 14May 11May 8May 4
32°FMay 19May 15May 11May 9May 6May 4May 3Apr 30Apr 26
28°FMay 9May 5May 3Apr 30Apr 29Apr 26Apr 23Apr 19Apr 14
24°FApr 30Apr 28Apr 24Apr 21Apr 19Apr 16Apr 12Apr 9Apr 5
20°FApr 23Apr 19Apr 15Apr 12Apr 10Apr 7Apr 5Apr 2Mar 30
16°FApr 17Apr 12Apr 8Apr 5Apr 3Apr 1Mar 30Mar 25Mar 19

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 15Sep 19Sep 22Sep 25Sep 27Sep 29Oct 1Oct 4Oct 9
32°FSep 24Sep 29Oct 1Oct 4Oct 7Oct 10Oct 12Oct 16Oct 20
28°FOct 4Oct 8Oct 12Oct 15Oct 18Oct 21Oct 24Oct 27Nov 1
24°FOct 15Oct 21Oct 25Oct 28Oct 30Nov 1Nov 3Nov 6Nov 11
20°FOct 26Oct 30Nov 1Nov 4Nov 6Nov 9Nov 11Nov 15Nov 19
16°FNov 1Nov 5Nov 8Nov 11Nov 14Nov 16Nov 19Nov 22Nov 26

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°F149143139136132129125121114
32°F169163159155152148144140135
28°F191184180176172169165161154
24°F211204199196192189185181175
20°F228222217213208205202197192
16°F244237232228224221216211205

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
8,954
Cooling degree days, base 65°F
406
Growing degree days, base 40°F
3,921
Growing degree days, base 45°F
2,982
Growing degree days, base 50°F
2,154
Growing degree days, base 55°F
1,443
Growing degree days, base 60°F
855

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,73400
February1,43100
March1,17302
April725029
May34016194
June8578444
July22168611
August37116544
September21928277
October621152
November1,05302
December1,51400

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 13.4 km from Emily. Low ground, valleys and open fields freeze earlier and later than a town center or a hillside.

More

Sources

NOAA NCEI U.S. Climate Normals, 1991-2020, annual and seasonal normals for station USC00216547 (Pine Rvr Dam). Public domain.