Raymond climate

Raymond Frost Dates and Growing Season

NOAA 1991-2020 normals for Raymond 2 S, 3.8 km from Raymond, elevation 30 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Raymond 2 S. 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 April 26 and the first fall freeze around October 17, a growing season of about 177 days.

Median at 36°F
last May 13, first September 30
Median at 32°F
last April 26, first October 17
Median at 28°F
last March 27, first November 7

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 1May 28May 23May 17May 13May 10May 6May 2Apr 27
32°FMay 12May 5May 1Apr 29Apr 26Apr 22Apr 18Apr 12Apr 1
28°FApr 22Apr 14Apr 6Apr 1Mar 27Mar 20Mar 13Mar 5Feb 27
24°FMar 20Mar 8Mar 2Feb 27Feb 23Feb 16Feb 8Jan 23Dec 31
20°FFeb 28Feb 22Feb 14Feb 2Jan 22Jan 5Dec 27Dec 14Dec 4
16°FFeb 16Feb 1Jan 12Dec 31Dec 25Dec 17Dec 9Dec 5Nov 27

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 14Sep 20Sep 24Sep 28Sep 30Oct 3Oct 6Oct 11Oct 18
32°FOct 1Oct 4Oct 8Oct 13Oct 17Oct 23Oct 27Nov 1Nov 7
28°FOct 15Oct 23Oct 30Nov 2Nov 7Nov 12Nov 19Nov 26Dec 6
24°FNov 1Nov 9Nov 16Nov 23Nov 28Dec 3Dec 12Dec 24Jan 6
20°FNov 14Nov 25Dec 1Dec 7Dec 13Dec 21Dec 31Jan 16Feb 12
16°FNov 22Nov 30Dec 5Dec 8Dec 15Dec 23Jan 1Jan 17Feb 8

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°F162155149143139133128122113
32°F206195188182177171165159150
28°F265250241235228220214205191
24°F334315304295286276267256244
20°F365365355342333322313304285
16°F365365365365365365363344328

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
99% of years
20°F or colder
77% of years
16°F or colder
33% 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
5,572
Cooling degree days, base 65°F
44
Growing degree days, base 40°F
3,825
Growing degree days, base 45°F
2,440
Growing degree days, base 50°F
1,397
Growing degree days, base 55°F
658
Growing degree days, base 60°F
212

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January76103
February65902
March64209
April522030
May3692122
June2455211
July13516346
August12216360
September2185239
October462065
November647010
December79002

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 3.8 km from Raymond. 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 USC00456914 (Raymond 2 S). Public domain.