Bremond Frost Dates and Growing Season
Frost and the growing season
NOAA's 1991-2020 freeze probabilities for Franklin. 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 February 28 and the first fall freeze around November 28, a growing season of about 277 days.
- Median at 36°F
- last March 13, first November 17
- Median at 32°F
- last February 28, first November 28
- Median at 28°F
- last February 6, first December 14
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 | Apr 4 | Mar 30 | Mar 23 | Mar 17 | Mar 13 | Mar 8 | Mar 4 | Feb 27 | Feb 21 |
| 32°F | Mar 21 | Mar 14 | Mar 8 | Mar 4 | Feb 28 | Feb 24 | Feb 16 | Feb 6 | Jan 26 |
| 28°F | Mar 9 | Mar 2 | Feb 24 | Feb 14 | Feb 6 | Jan 30 | Jan 24 | Jan 16 | Jan 5 |
| 24°F | Feb 26 | Feb 13 | Feb 2 | Jan 28 | Jan 21 | Jan 14 | Jan 8 | Dec 31 | Dec 21 |
| 20°F | Feb 11 | Feb 1 | Jan 25 | Jan 18 | Jan 13 | Jan 7 | Jan 4 | Dec 31 | Dec 18 |
| 16°F | Jan 31 | Jan 21 | Jan 19 | Jan 11 | Jan 7 | Jan 5 | Jan 3 | Jan 1 | Dec 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.
| Threshold | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Nov 1 | Nov 4 | Nov 8 | Nov 13 | Nov 17 | Nov 21 | Nov 25 | Dec 1 | Dec 6 |
| 32°F | Nov 6 | Nov 13 | Nov 18 | Nov 23 | Nov 28 | Dec 3 | Dec 7 | Dec 14 | Dec 25 |
| 28°F | Nov 17 | Nov 25 | Dec 1 | Dec 7 | Dec 14 | Dec 22 | Dec 29 | Jan 5 | Jan 13 |
| 24°F | Nov 26 | Dec 6 | Dec 17 | Dec 25 | Jan 1 | Jan 4 | Jan 9 | Jan 16 | Jan 29 |
| 20°F | Dec 10 | Dec 24 | Dec 31 | Jan 2 | Jan 5 | Jan 8 | Jan 12 | Jan 18 | Feb 1 |
| 16°F | Dec 17 | Dec 31 | Jan 1 | Jan 4 | Jan 5 | Jan 8 | Jan 11 | Jan 18 | Jan 25 |
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 | 277 | 268 | 260 | 254 | 248 | 241 | 237 | 230 | 220 |
| 32°F | 312 | 300 | 292 | 285 | 277 | 270 | 263 | 254 | 243 |
| 28°F | 353 | 338 | 329 | 320 | 310 | 303 | 294 | 284 | 271 |
| 24°F | 365 | 365 | 365 | 356 | 347 | 338 | 330 | 319 | 303 |
| 20°F | 365 | 365 | 365 | 365 | 365 | 365 | 363 | 352 | 337 |
| 16°F | 365 | 365 | 365 | 365 | 365 | 365 | 365 | 365 | 365 |
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
- 97% of years
- 24°F or colder
- 74% of years
- 20°F or colder
- 37% of years
- 16°F or colder
- 12% 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
- 1,764
- Cooling degree days, base 65°F
- 2,864
- Growing degree days, base 40°F
- 10,273
- Growing degree days, base 45°F
- 8,538
- Growing degree days, base 50°F
- 6,897
- Growing degree days, base 55°F
- 5,396
- Growing degree days, base 60°F
- 4,049
Growing degree days by month, base 50°F
Heating and cooling by month
| Month | Heating DD | Cooling DD | Growing DD 50 |
|---|---|---|---|
| January | 480 | 6 | 115 |
| February | 324 | 17 | 169 |
| March | 187 | 46 | 341 |
| April | 55 | 134 | 531 |
| May | 5 | 310 | 770 |
| June | 0 | 496 | 946 |
| July | 0 | 589 | 1,054 |
| August | 0 | 603 | 1,067 |
| September | 2 | 423 | 871 |
| October | 48 | 186 | 606 |
| November | 228 | 43 | 292 |
| December | 434 | 11 | 136 |
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 23.2 km from Bremond. 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 USC00413321 (Franklin). Public domain.