Ramtown climate

Ramtown Frost Dates and Growing Season

NOAA 1991-2020 normals for Toms River, 20 km from Ramtown, elevation 10 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Toms River. 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 23 and the first fall freeze around October 20, a growing season of about 179 days.

Median at 36°F
last May 4, first October 8
Median at 32°F
last April 23, first October 20
Median at 28°F
last April 8, first November 1

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 22May 17May 12May 8May 4Apr 30Apr 28Apr 24Apr 20
32°FMay 12May 5Apr 30Apr 26Apr 23Apr 20Apr 16Apr 13Apr 8
28°FApr 28Apr 20Apr 16Apr 12Apr 8Apr 6Apr 3Mar 31Mar 27
24°FApr 10Apr 4Apr 1Mar 30Mar 27Mar 24Mar 21Mar 18Mar 13
20°FMar 31Mar 26Mar 22Mar 19Mar 17Mar 13Mar 10Mar 6Mar 1
16°FMar 21Mar 17Mar 13Mar 10Mar 7Mar 3Feb 28Feb 25Feb 17

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

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°F175170166161157153148143136
32°F198192187183179175171165157
28°F224217213208204200195191183
24°F249242237233229226222218212
20°F277270264258253248244238231
16°F304297290285280275268261253

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
5,328
Cooling degree days, base 65°F
861
Growing degree days, base 40°F
5,507
Growing degree days, base 45°F
4,258
Growing degree days, base 50°F
3,176
Growing degree days, base 55°F
2,249
Growing degree days, base 60°F
1,480

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,03404
February89003
March786117
April4578103
May19644319
June41157567
July1306770
August3250711
September7587462
October3438170
November626040
December877010

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 20 km from Ramtown. 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 USC00288816 (Toms River). Public domain.