Bland County climate

Bland County Frost Dates and Growing Season

NOAA 1991-2020 normals for Bland, 4 km from Bland County, elevation 2000 ft

Frost and the growing season

NOAA's 1991-2020 freeze probabilities for Bland. 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 10, a growing season of about 157 days.

Median at 36°F
last May 16, first September 30
Median at 32°F
last May 6, first October 10
Median at 28°F
last April 23, first October 19

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 31May 27May 23May 19May 16May 13May 9May 6May 1
32°FMay 22May 16May 12May 9May 6May 2Apr 30Apr 25Apr 20
28°FMay 12May 7May 1Apr 28Apr 23Apr 19Apr 16Apr 12Apr 7
24°FApr 27Apr 20Apr 14Apr 11Apr 7Apr 4Apr 1Mar 30Mar 22
20°FApr 8Apr 3Mar 31Mar 29Mar 25Mar 21Mar 18Mar 14Mar 7
16°FMar 31Mar 24Mar 20Mar 16Mar 12Mar 8Mar 3Feb 26Feb 18

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 13Sep 19Sep 23Sep 26Sep 30Oct 2Oct 5Oct 8Oct 13
32°FSep 25Oct 1Oct 4Oct 8Oct 10Oct 13Oct 16Oct 19Oct 24
28°FOct 7Oct 11Oct 14Oct 16Oct 19Oct 21Oct 25Oct 28Nov 2
24°FOct 15Oct 20Oct 23Oct 26Oct 29Nov 1Nov 4Nov 7Nov 12
20°FOct 26Oct 31Nov 3Nov 6Nov 9Nov 12Nov 15Nov 20Nov 30
16°FNov 4Nov 10Nov 14Nov 18Nov 23Nov 29Dec 2Dec 7Dec 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°F155148144139135131125120113
32°F177170165160157152146141133
28°F200193188182178173168163154
24°F224218212208204199195189181
20°F254244238233229224220214206
16°F286276269262256251244238229

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
5,544
Cooling degree days, base 65°F
448
Growing degree days, base 40°F
4,966
Growing degree days, base 45°F
3,728
Growing degree days, base 50°F
2,661
Growing degree days, base 55°F
1,757
Growing degree days, base 60°F
1,013

Growing degree days by month, base 50°F

Heating and cooling by month

MonthHeating DDCooling DDGrowing DD 50
January1,03704
February86504
March750024
April4522108
May22020282
June5484480
July12162615
August17131580
September11044388
October4024138
November692028
December933010

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 4 km from Bland County. 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 USC00440792 (Bland). Public domain.