Calendar Day of the Year frequencies of temperatures 100°F or higher.
Lincoln Temperature Data 1887-2024 (138 years)
Highest frequency 19/138 Years: July 17.
Second Highest frequency 18/138 years: July 11, 14, 29
Earliest 100°F or higher May 14
Latest 100°F or higher September 28
Table data Xmacis verified thru December 31, 2024
| DAY | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC |
| 1 | 0 | 0 | 0 | 0 | 0 | 0 | 10 | 16 | 4 | 0 | 0 | 0 |
| 2 | 0 | 0 | 0 | 0 | 0 | 1 | 8 | 15 | 2 | 0 | 0 | 0 |
| 3 | 0 | 0 | 0 | 0 | 0 | 0 | 8 | 14 | 3 | 0 | 0 | 0 |
| 4 | 0 | 0 | 0 | 0 | 0 | 1 | 11 | 12 | 3 | 0 | 0 | 0 |
| 5 | 0 | 0 | 0 | 0 | 0 | 2 | 11 | 13 | 5 | 0 | 0 | 0 |
| 6 | 0 | 0 | 0 | 0 | 0 | 3 | 13 | 5 | 7 | 0 | 0 | 0 |
| 7 | 0 | 0 | 0 | 0 | 0 | 2 | 11 | 7 | 6 | 0 | 0 | 0 |
| 8 | 0 | 0 | 0 | 0 | 0 | 2 | 10 | 7 | 4 | 0 | 0 | 0 |
| 9 | 0 | 0 | 0 | 0 | 0 | 2 | 13 | 10 | 2 | 0 | 0 | 0 |
| 10 | 0 | 0 | 0 | 0 | 0 | 2 | 8 | 6 | 1 | 0 | 0 | 0 |
| 11 | 0 | 0 | 0 | 0 | 0 | 3 | 18 | 3 | 0 | 0 | 0 | 0 |
| 12 | 0 | 0 | 0 | 0 | 0 | 3 | 15 | 8 | 0 | 0 | 0 | 0 |
| 13 | 0 | 0 | 0 | 0 | 0 | 4 | 13 | 7 | 1 | 0 | 0 | 0 |
| 14 | 0 | 0 | 0 | 0 | 1 | 2 | 18 | 5 | 0 | 0 | 0 | 0 |
| 15 | 0 | 0 | 0 | 0 | 0 | 6 | 11 | 8 | 0 | 0 | 0 | 0 |
| 16 | 0 | 0 | 0 | 0 | 0 | 5 | 11 | 12 | 1 | 0 | 0 | 0 |
| 17 | 0 | 0 | 0 | 0 | 0 | 3 | 19 | 8 | 2 | 0 | 0 | 0 |
| 18 | 0 | 0 | 0 | 0 | 0 | 4 | 11 | 6 | 1 | 0 | 0 | 0 |
| 19 | 0 | 0 | 0 | 0 | 0 | 5 | 15 | 4 | 1 | 0 | 0 | 0 |
| 20 | 0 | 0 | 0 | 0 | 0 | 4 | 14 | 5 | 1 | 0 | 0 | 0 |
| 21 | 0 | 0 | 0 | 0 | 0 | 4 | 12 | 4 | 2 | 0 | 0 | 0 |
| 22 | 0 | 0 | 0 | 0 | 0 | 1 | 10 | 7 | 0 | 0 | 0 | 0 |
| 23 | 0 | 0 | 0 | 0 | 0 | 6 | 13 | 6 | 0 | 0 | 0 | 0 |
| 24 | 0 | 0 | 0 | 0 | 1 | 10 | 10 | 7 | 0 | 0 | 0 | 0 |
| 25 | 0 | 0 | 0 | 0 | 0 | 7 | 13 | 9 | 0 | 0 | 0 | 0 |
| 26 | 0 | 0 | 0 | 0 | 1 | 6 | 13 | 9 | 0 | 0 | 0 | 0 |
| 27 | 0 | 0 | 0 | 0 | 0 | 7 | 17 | 9 | 0 | 0 | 0 | 0 |
| 28 | 0 | 0 | 0 | 0 | 0 | 10 | 14 | 4 | 1 | 0 | 0 | 0 |
| 29 | 0 | 0 | 0 | 0 | 1 | 6 | 18 | 1 | 0 | 0 | 0 | 0 |
| 30 | 0 | - | 0 | 0 | 1 | 8 | 14 | 7 | 0 | 0 | 0 | 0 |
| 31 | 0 | - | 0 | - | 1 | - | 13 | 4 | - | 0 | - | 0 |