Kingsley Frost Dates and Growing Season
Frost and the growing season
NOAA's 1991-2020 freeze probabilities for Fife Lake 2WNW. 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 24 and the first fall freeze around October 1, a growing season of about 130 days.
- Median at 36°F
- last June 4, first September 20
- Median at 32°F
- last May 24, first October 1
- Median at 28°F
- last May 9, first October 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 | Jun 26 | Jun 17 | Jun 11 | Jun 7 | Jun 4 | Jun 2 | May 31 | May 27 | May 22 |
| 32°F | Jun 6 | Jun 2 | May 30 | May 27 | May 24 | May 22 | May 18 | May 14 | May 7 |
| 28°F | May 25 | May 21 | May 17 | May 13 | May 9 | May 5 | May 2 | Apr 30 | Apr 25 |
| 24°F | May 15 | May 8 | May 4 | May 1 | Apr 29 | Apr 26 | Apr 23 | Apr 19 | Apr 15 |
| 20°F | Apr 30 | Apr 26 | Apr 22 | Apr 18 | Apr 16 | Apr 14 | Apr 10 | Apr 7 | Apr 3 |
| 16°F | Apr 18 | Apr 14 | Apr 10 | Apr 8 | Apr 5 | Apr 3 | Apr 1 | Mar 29 | Mar 23 |
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 | Sep 2 | Sep 9 | Sep 14 | Sep 17 | Sep 20 | Sep 22 | Sep 25 | Sep 28 | Oct 2 |
| 32°F | Sep 18 | Sep 23 | Sep 26 | Sep 29 | Oct 1 | Oct 4 | Oct 7 | Oct 10 | Oct 15 |
| 28°F | Sep 29 | Oct 3 | Oct 6 | Oct 10 | Oct 14 | Oct 17 | Oct 20 | Oct 25 | Oct 31 |
| 24°F | Oct 13 | Oct 19 | Oct 23 | Oct 27 | Oct 30 | Nov 1 | Nov 4 | Nov 7 | Nov 12 |
| 20°F | Oct 29 | Nov 1 | Nov 4 | Nov 7 | Nov 10 | Nov 13 | Nov 16 | Nov 20 | Nov 27 |
| 16°F | Nov 7 | Nov 11 | Nov 16 | Nov 19 | Nov 22 | Nov 26 | Nov 29 | Dec 3 | Dec 9 |
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 | 125 | 118 | 113 | 109 | 105 | 101 | 96 | 89 | 79 |
| 32°F | 151 | 144 | 139 | 134 | 130 | 126 | 122 | 116 | 109 |
| 28°F | 177 | 170 | 165 | 160 | 156 | 152 | 147 | 141 | 133 |
| 24°F | 203 | 196 | 191 | 187 | 183 | 179 | 174 | 168 | 160 |
| 20°F | 229 | 222 | 216 | 211 | 208 | 204 | 200 | 194 | 188 |
| 16°F | 250 | 244 | 238 | 234 | 229 | 226 | 221 | 217 | 210 |
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
- 8,270
- Cooling degree days, base 65°F
- 280
- Growing degree days, base 40°F
- 3,681
- Growing degree days, base 45°F
- 2,754
- Growing degree days, base 50°F
- 1,940
- Growing degree days, base 55°F
- 1,233
- Growing degree days, base 60°F
- 668
Growing degree days by month, base 50°F
Heating and cooling by month
| Month | Heating DD | Cooling DD | Growing DD 50 |
|---|---|---|---|
| January | 1,467 | 0 | 0 |
| February | 1,274 | 0 | 0 |
| March | 1,175 | 0 | 0 |
| April | 752 | 0 | 26 |
| May | 389 | 9 | 171 |
| June | 112 | 50 | 392 |
| July | 54 | 113 | 524 |
| August | 67 | 78 | 476 |
| September | 219 | 30 | 280 |
| October | 582 | 1 | 64 |
| November | 917 | 0 | 8 |
| December | 1,263 | 0 | 0 |
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 13.5 km from Kingsley. 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 USC00202783 (Fife Lake 2WNW). Public domain.