Cricket Frost Dates and Growing Season
Frost and the growing season
NOAA's 1991-2020 freeze probabilities for N Wilkesboro. 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 10 and the first fall freeze around October 29, a growing season of about 201 days.
- Median at 36°F
- last April 24, first October 20
- Median at 32°F
- last April 10, first October 29
- Median at 28°F
- last March 27, first November 8
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.
| Threshold | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | May 11 | May 6 | May 2 | Apr 29 | Apr 24 | Apr 21 | Apr 17 | Apr 13 | Apr 8 |
| 32°F | Apr 26 | Apr 20 | Apr 16 | Apr 13 | Apr 10 | Apr 6 | Apr 3 | Mar 31 | Mar 25 |
| 28°F | Apr 11 | Apr 6 | Apr 3 | Mar 31 | Mar 27 | Mar 24 | Mar 20 | Mar 16 | Mar 9 |
| 24°F | Apr 1 | Mar 26 | Mar 20 | Mar 16 | Mar 13 | Mar 9 | Mar 4 | Feb 28 | Feb 20 |
| 20°F | Mar 18 | Mar 12 | Mar 6 | Mar 1 | Feb 26 | Feb 19 | Feb 13 | Feb 6 | Jan 31 |
| 16°F | Mar 8 | Feb 28 | Feb 18 | Feb 11 | Feb 5 | Jan 31 | Jan 28 | Jan 18 | Jan 10 |
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.
| Threshold | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 7 | Oct 11 | Oct 14 | Oct 17 | Oct 20 | Oct 22 | Oct 25 | Oct 29 | Nov 2 |
| 32°F | Oct 16 | Oct 21 | Oct 24 | Oct 27 | Oct 29 | Nov 1 | Nov 3 | Nov 6 | Nov 10 |
| 28°F | Oct 27 | Oct 31 | Nov 3 | Nov 6 | Nov 8 | Nov 11 | Nov 14 | Nov 18 | Nov 24 |
| 24°F | Nov 6 | Nov 10 | Nov 14 | Nov 18 | Nov 22 | Nov 25 | Nov 30 | Dec 4 | Dec 10 |
| 20°F | Nov 16 | Nov 24 | Nov 29 | Dec 3 | Dec 6 | Dec 11 | Dec 17 | Dec 25 | Jan 2 |
| 16°F | Dec 1 | Dec 7 | Dec 14 | Dec 21 | Dec 26 | Dec 31 | Jan 6 | Jan 13 | Jan 21 |
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.
| Threshold | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | 198 | 191 | 187 | 182 | 178 | 174 | 170 | 165 | 157 |
| 32°F | 225 | 215 | 210 | 206 | 201 | 197 | 192 | 188 | 180 |
| 28°F | 250 | 241 | 236 | 231 | 226 | 222 | 217 | 212 | 205 |
| 24°F | 281 | 270 | 264 | 259 | 253 | 248 | 243 | 237 | 229 |
| 20°F | 321 | 308 | 300 | 293 | 286 | 280 | 274 | 266 | 257 |
| 16°F | 351 | 339 | 333 | 327 | 319 | 312 | 303 | 294 | 282 |
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
- 95% 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
- 4,000
- Cooling degree days, base 65°F
- 1,201
- Growing degree days, base 40°F
- 6,712
- Growing degree days, base 45°F
- 5,276
- Growing degree days, base 50°F
- 4,013
- Growing degree days, base 55°F
- 2,919
- Growing degree days, base 60°F
- 1,982
Growing degree days by month, base 50°F
Heating and cooling by month
| Month | Heating DD | Cooling DD | Growing DD 50 |
|---|---|---|---|
| January | 849 | 0 | 11 |
| February | 679 | 0 | 17 |
| March | 537 | 2 | 83 |
| April | 266 | 18 | 233 |
| May | 89 | 95 | 473 |
| June | 9 | 246 | 687 |
| July | 1 | 355 | 820 |
| August | 1 | 311 | 775 |
| September | 38 | 149 | 561 |
| October | 240 | 23 | 268 |
| November | 528 | 1 | 68 |
| December | 764 | 0 | 17 |
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 3.7 km from Cricket. 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 USC00316256 (N Wilkesboro). Public domain.