Lakeview Frost Dates and Growing Season
Frost and the growing season
NOAA's 1991-2020 freeze probabilities for Huntsville 3N. 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 22 and the first fall freeze around October 27, a growing season of about 188 days.
- Median at 36°F
- last May 2, first October 15
- Median at 32°F
- last April 22, first October 27
- Median at 28°F
- last April 10, first November 6
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 16 | May 11 | May 8 | May 5 | May 2 | Apr 30 | Apr 26 | Apr 23 | Apr 19 |
| 32°F | May 6 | May 2 | Apr 28 | Apr 25 | Apr 22 | Apr 20 | Apr 17 | Apr 13 | Apr 8 |
| 28°F | Apr 23 | Apr 19 | Apr 16 | Apr 13 | Apr 10 | Apr 7 | Apr 4 | Apr 1 | Mar 28 |
| 24°F | Apr 15 | Apr 9 | Apr 5 | Apr 2 | Mar 31 | Mar 29 | Mar 25 | Mar 20 | Mar 13 |
| 20°F | Apr 3 | Mar 31 | Mar 28 | Mar 24 | Mar 21 | Mar 17 | Mar 13 | Mar 9 | Mar 2 |
| 16°F | Mar 26 | Mar 21 | Mar 17 | Mar 13 | Mar 9 | Mar 6 | Mar 2 | Feb 25 | Feb 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.
| Threshold | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Oct 1 | Oct 5 | Oct 9 | Oct 12 | Oct 15 | Oct 17 | Oct 20 | Oct 23 | Oct 28 |
| 32°F | Oct 14 | Oct 18 | Oct 21 | Oct 24 | Oct 27 | Oct 30 | Nov 1 | Nov 3 | Nov 7 |
| 28°F | Oct 24 | Oct 30 | Nov 1 | Nov 3 | Nov 6 | Nov 8 | Nov 12 | Nov 16 | Nov 22 |
| 24°F | Nov 3 | Nov 7 | Nov 10 | Nov 14 | Nov 17 | Nov 21 | Nov 25 | Dec 1 | Dec 7 |
| 20°F | Nov 10 | Nov 15 | Nov 21 | Nov 26 | Nov 29 | Dec 3 | Dec 7 | Dec 13 | Dec 20 |
| 16°F | Nov 20 | Nov 28 | Dec 1 | Dec 6 | Dec 10 | Dec 16 | Dec 21 | Dec 25 | Jan 1 |
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 | 185 | 179 | 173 | 170 | 166 | 161 | 157 | 152 | 144 |
| 32°F | 208 | 200 | 196 | 192 | 188 | 184 | 180 | 175 | 168 |
| 28°F | 232 | 224 | 219 | 214 | 211 | 207 | 203 | 197 | 191 |
| 24°F | 255 | 247 | 241 | 237 | 232 | 228 | 223 | 219 | 213 |
| 20°F | 279 | 271 | 265 | 260 | 255 | 250 | 245 | 239 | 231 |
| 16°F | 301 | 294 | 287 | 282 | 277 | 272 | 265 | 258 | 250 |
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
- 5,614
- Cooling degree days, base 65°F
- 924
- Growing degree days, base 40°F
- 5,635
- Growing degree days, base 45°F
- 4,413
- Growing degree days, base 50°F
- 3,341
- Growing degree days, base 55°F
- 2,404
- Growing degree days, base 60°F
- 1,597
Growing degree days by month, base 50°F
Heating and cooling by month
| Month | Heating DD | Cooling DD | Growing DD 50 |
|---|---|---|---|
| January | 1,167 | 0 | 1 |
| February | 962 | 0 | 4 |
| March | 798 | 1 | 33 |
| April | 422 | 4 | 126 |
| May | 160 | 67 | 383 |
| June | 15 | 195 | 630 |
| July | 4 | 283 | 744 |
| August | 5 | 237 | 697 |
| September | 78 | 119 | 491 |
| October | 337 | 17 | 194 |
| November | 676 | 1 | 34 |
| December | 990 | 0 | 4 |
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 9.3 km from Lakeview. 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 USC00333915 (Huntsville 3N). Public domain.