Albion Frost Dates and Growing Season
Frost and the growing season
NOAA's 1991-2020 freeze probabilities for Grayville. 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 7 and the first fall freeze around October 25, a growing season of about 201 days.
- Median at 36°F
- last April 20, first October 17
- Median at 32°F
- last April 7, first October 25
- Median at 28°F
- last March 28, first November 5
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 6 | Apr 30 | Apr 26 | Apr 23 | Apr 20 | Apr 17 | Apr 13 | Apr 9 | Apr 5 |
| 32°F | Apr 23 | Apr 18 | Apr 14 | Apr 10 | Apr 7 | Apr 4 | Apr 1 | Mar 29 | Mar 24 |
| 28°F | Apr 12 | Apr 7 | Apr 4 | Mar 31 | Mar 28 | Mar 25 | Mar 21 | Mar 17 | Mar 11 |
| 24°F | Apr 2 | Mar 29 | Mar 24 | Mar 19 | Mar 16 | Mar 13 | Mar 8 | Mar 3 | Feb 25 |
| 20°F | Mar 21 | Mar 16 | Mar 13 | Mar 9 | Mar 5 | Mar 2 | Feb 26 | Feb 21 | Feb 12 |
| 16°F | Mar 15 | Mar 8 | Mar 3 | Feb 28 | Feb 25 | Feb 19 | Feb 13 | Feb 8 | Feb 1 |
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 4 | Oct 9 | Oct 12 | Oct 14 | Oct 17 | Oct 19 | Oct 21 | Oct 23 | Oct 27 |
| 32°F | Oct 12 | Oct 18 | Oct 21 | Oct 23 | Oct 25 | Oct 28 | Oct 31 | Nov 2 | Nov 7 |
| 28°F | Oct 21 | Oct 26 | Oct 31 | Nov 2 | Nov 5 | Nov 9 | Nov 13 | Nov 17 | Nov 24 |
| 24°F | Nov 2 | Nov 7 | Nov 11 | Nov 15 | Nov 19 | Nov 23 | Nov 26 | Dec 1 | Dec 6 |
| 20°F | Nov 13 | Nov 19 | Nov 23 | Nov 27 | Dec 1 | Dec 4 | Dec 8 | Dec 13 | Dec 20 |
| 16°F | Nov 20 | Nov 27 | Dec 1 | Dec 6 | Dec 10 | Dec 15 | Dec 21 | Dec 26 | Jan 3 |
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 | 199 | 193 | 187 | 183 | 178 | 174 | 171 | 166 | 158 |
| 32°F | 221 | 214 | 209 | 205 | 201 | 197 | 193 | 188 | 179 |
| 28°F | 247 | 239 | 233 | 228 | 223 | 219 | 214 | 208 | 200 |
| 24°F | 271 | 263 | 258 | 252 | 247 | 242 | 236 | 231 | 224 |
| 20°F | 294 | 285 | 279 | 274 | 269 | 264 | 259 | 251 | 242 |
| 16°F | 319 | 309 | 302 | 297 | 292 | 286 | 280 | 273 | 264 |
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
- 4,584
- Cooling degree days, base 65°F
- 1,424
- Growing degree days, base 40°F
- 6,736
- Growing degree days, base 45°F
- 5,402
- Growing degree days, base 50°F
- 4,206
- Growing degree days, base 55°F
- 3,146
- Growing degree days, base 60°F
- 2,219
Growing degree days by month, base 50°F
Heating and cooling by month
| Month | Heating DD | Cooling DD | Growing DD 50 |
|---|---|---|---|
| January | 1,010 | 0 | 7 |
| February | 829 | 0 | 10 |
| March | 616 | 5 | 80 |
| April | 291 | 27 | 237 |
| May | 79 | 121 | 508 |
| June | 5 | 308 | 753 |
| July | 0 | 406 | 871 |
| August | 1 | 348 | 812 |
| September | 36 | 178 | 593 |
| October | 253 | 30 | 263 |
| November | 571 | 1 | 61 |
| December | 893 | 0 | 12 |
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 12.4 km from Albion. 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 USC00113612 (Grayville). Public domain.