Eagar climate

Eagar Frost Dates and Growing Season

NOAA 1991-2020 normals for Springerville, 2.7 km from Eagar, elevation 6998 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Springerville. 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 June 1 and the first fall freeze around September 26, a growing season of about 114 days.

Median at 36°F
last June 12, first September 18
Median at 32°F
last June 1, first September 26
Median at 28°F
last May 18, first October 3

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 30Jun 23Jun 20Jun 16Jun 12Jun 9Jun 6Jun 3May 31
32°FJun 20Jun 12Jun 7Jun 4Jun 1May 31May 27May 23May 17
28°FJun 6May 31May 27May 22May 18May 15May 12May 8May 4
24°FMay 23May 17May 13May 9May 6May 3May 1Apr 28Apr 23
20°FMay 10May 5May 2Apr 29Apr 26Apr 23Apr 19Apr 15Apr 10
16°FApr 29Apr 23Apr 18Apr 14Apr 10Apr 7Apr 3Mar 30Mar 21

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 4Sep 8Sep 12Sep 15Sep 18Sep 21Sep 23Sep 26Sep 30
32°FSep 12Sep 17Sep 21Sep 24Sep 26Sep 29Oct 1Oct 3Oct 7
28°FSep 21Sep 25Sep 29Oct 1Oct 3Oct 5Oct 8Oct 11Oct 17
24°FSep 30Oct 2Oct 5Oct 8Oct 11Oct 14Oct 18Oct 21Oct 26
20°FOct 5Oct 10Oct 14Oct 18Oct 21Oct 25Oct 29Nov 1Nov 4
16°FOct 14Oct 20Oct 24Oct 28Nov 1Nov 3Nov 6Nov 10Nov 17

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°F113108102989389858172
32°F13312712111711411010610194
28°F156148144139135131127121113
24°F176170164160156152148142134
20°F199192186181176172168162154
16°F227219214208203198192186178

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
5,654
Cooling degree days, base 65°F
269
Growing degree days, base 40°F
4,498
Growing degree days, base 45°F
3,271
Growing degree days, base 50°F
2,249
Growing degree days, base 55°F
1,401
Growing degree days, base 60°F
735

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January98700
February79002
March710011
April497061
May2835206
June6857440
July8122578
August2272515
September13613329
October437097
November729011
December98701

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 2.7 km from Eagar. 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 USC00028162 (Springerville). Public domain.