Eskridge Frost Dates and Growing Season
Frost and the growing season
NOAA's 1991-2020 freeze probabilities for Eskridge. 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 16 and the first fall freeze around October 23, a growing season of about 189 days.
- Median at 36°F
- last April 26, first October 14
- Median at 32°F
- last April 16, first October 23
- Median at 28°F
- last April 6, first November 1
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 7 | May 3 | May 1 | Apr 30 | Apr 26 | Apr 23 | Apr 20 | Apr 17 | Apr 13 |
| 32°F | Apr 30 | Apr 25 | Apr 21 | Apr 18 | Apr 16 | Apr 14 | Apr 10 | Apr 7 | Apr 2 |
| 28°F | Apr 21 | Apr 16 | Apr 12 | Apr 9 | Apr 6 | Apr 3 | Mar 31 | Mar 27 | Mar 20 |
| 24°F | Apr 12 | Apr 6 | Apr 2 | Mar 31 | Mar 27 | Mar 24 | Mar 20 | Mar 16 | Mar 10 |
| 20°F | Apr 2 | Mar 28 | Mar 23 | Mar 19 | Mar 16 | Mar 12 | Mar 8 | Mar 4 | Feb 28 |
| 16°F | Mar 24 | Mar 18 | Mar 13 | Mar 10 | Mar 7 | Mar 4 | Mar 1 | Feb 25 | Feb 19 |
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 30 | Oct 4 | Oct 7 | Oct 11 | Oct 14 | Oct 17 | Oct 19 | Oct 22 | Oct 26 |
| 32°F | Oct 9 | Oct 14 | Oct 17 | Oct 20 | Oct 23 | Oct 25 | Oct 29 | Nov 1 | Nov 5 |
| 28°F | Oct 18 | Oct 23 | Oct 27 | Oct 31 | Nov 1 | Nov 4 | Nov 7 | Nov 11 | Nov 16 |
| 24°F | Oct 28 | Nov 1 | Nov 4 | Nov 7 | Nov 10 | Nov 13 | Nov 17 | Nov 22 | Nov 27 |
| 20°F | Nov 2 | Nov 7 | Nov 12 | Nov 16 | Nov 20 | Nov 23 | Nov 26 | Nov 30 | Dec 5 |
| 16°F | Nov 10 | Nov 17 | Nov 21 | Nov 25 | Nov 29 | Dec 1 | Dec 5 | Dec 11 | Dec 17 |
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 | 188 | 182 | 178 | 173 | 170 | 166 | 162 | 158 | 150 |
| 32°F | 209 | 202 | 197 | 193 | 189 | 185 | 181 | 176 | 170 |
| 28°F | 231 | 223 | 217 | 212 | 209 | 205 | 200 | 194 | 188 |
| 24°F | 252 | 244 | 238 | 233 | 228 | 222 | 218 | 212 | 204 |
| 20°F | 272 | 263 | 256 | 251 | 246 | 241 | 235 | 229 | 221 |
| 16°F | 292 | 282 | 276 | 271 | 266 | 260 | 254 | 247 | 238 |
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
- 5,321
- Cooling degree days, base 65°F
- 1,262
- Growing degree days, base 40°F
- 6,231
- Growing degree days, base 45°F
- 4,970
- Growing degree days, base 50°F
- 3,844
- Growing degree days, base 55°F
- 2,852
- Growing degree days, base 60°F
- 1,992
Growing degree days by month, base 50°F
Heating and cooling by month
| Month | Heating DD | Cooling DD | Growing DD 50 |
|---|---|---|---|
| January | 1,147 | 0 | 1 |
| February | 906 | 0 | 9 |
| March | 687 | 2 | 58 |
| April | 372 | 11 | 170 |
| May | 128 | 85 | 427 |
| June | 9 | 251 | 693 |
| July | 1 | 393 | 857 |
| August | 2 | 348 | 811 |
| September | 61 | 149 | 540 |
| October | 307 | 24 | 235 |
| November | 677 | 1 | 41 |
| December | 1,024 | 0 | 3 |
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 0.3 km from Eskridge. 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 USC00142602 (Eskridge). Public domain.