Glide Frost Dates and Growing Season
Frost and the growing season
NOAA's 1991-2020 freeze probabilities for Idleyld Park 4 Ne. 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 27 and the first fall freeze around October 19, a growing season of about 176 days.
- Median at 36°F
- last May 21, first September 27
- Median at 32°F
- last April 27, first October 19
- Median at 28°F
- last March 21, first November 13
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 12 | Jun 4 | May 30 | May 25 | May 21 | May 17 | May 13 | May 9 | May 1 |
| 32°F | May 15 | May 9 | May 5 | May 1 | Apr 27 | Apr 23 | Apr 18 | Apr 12 | Apr 2 |
| 28°F | Apr 27 | Apr 13 | Apr 2 | Mar 28 | Mar 21 | Mar 13 | Mar 4 | Feb 26 | Feb 15 |
| 24°F | Mar 8 | Feb 28 | Feb 20 | Feb 12 | Jan 31 | Jan 16 | Jan 5 | Dec 25 | Dec 13 |
| 20°F | Jan 31 | Jan 18 | Jan 8 | Jan 3 | Dec 31 | Dec 24 | Dec 18 | Dec 13 | Dec 6 |
| 16°F | Jan 8 | Jan 3 | Dec 31 | Dec 25 | Dec 22 | Dec 19 | Dec 17 | Dec 13 | Dec 9 |
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 5 | Sep 11 | Sep 16 | Sep 21 | Sep 27 | Oct 1 | Oct 5 | Oct 11 | Oct 19 |
| 32°F | Sep 26 | Oct 4 | Oct 10 | Oct 14 | Oct 19 | Oct 24 | Oct 30 | Nov 3 | Nov 14 |
| 28°F | Oct 19 | Oct 26 | Nov 1 | Nov 6 | Nov 13 | Nov 20 | Nov 28 | Dec 5 | Dec 13 |
| 24°F | Nov 3 | Nov 18 | Nov 28 | Dec 5 | Dec 10 | Dec 14 | Dec 20 | Dec 28 | Jan 14 |
| 20°F | Nov 25 | Dec 5 | Dec 10 | Dec 14 | Dec 19 | Dec 24 | Dec 30 | Jan 3 | Jan 15 |
| 16°F | Dec 8 | Dec 12 | Dec 15 | Dec 17 | Dec 21 | Dec 24 | Dec 28 | Jan 1 | Jan 7 |
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 | 157 | 146 | 139 | 133 | 126 | 121 | 115 | 106 | 96 |
| 32°F | 208 | 196 | 189 | 182 | 176 | 169 | 163 | 155 | 144 |
| 28°F | 287 | 271 | 257 | 247 | 239 | 230 | 221 | 211 | 196 |
| 24°F | 359 | 347 | 336 | 326 | 315 | 306 | 296 | 282 | 265 |
| 20°F | 365 | 365 | 365 | 365 | 361 | 354 | 347 | 339 | 326 |
| 16°F | 365 | 365 | 365 | 365 | 365 | 365 | 365 | 364 | 352 |
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
- 91% of years
- 20°F or colder
- 52% of years
- 16°F or colder
- 19% 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
- 4,850
- Cooling degree days, base 65°F
- 256
- Growing degree days, base 40°F
- 4,759
- Growing degree days, base 45°F
- 3,345
- Growing degree days, base 50°F
- 2,209
- Growing degree days, base 55°F
- 1,333
- Growing degree days, base 60°F
- 682
Growing degree days by month, base 50°F
Heating and cooling by month
| Month | Heating DD | Cooling DD | Growing DD 50 |
|---|---|---|---|
| January | 780 | 0 | 2 |
| February | 633 | 0 | 5 |
| March | 586 | 0 | 20 |
| April | 443 | 0 | 71 |
| May | 265 | 8 | 218 |
| June | 132 | 21 | 340 |
| July | 27 | 103 | 541 |
| August | 30 | 95 | 530 |
| September | 126 | 29 | 353 |
| October | 390 | 1 | 112 |
| November | 623 | 0 | 15 |
| December | 817 | 0 | 2 |
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 13.4 km from Glide. 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 USC00354126 (Idleyld Park 4 Ne). Public domain.