Frost history / Norman 2NW Mesonet, OK
Norman 2NW Mesonet, OK: frost dates by year
Last spring and first fall frost at NOAA station USC00346382, 2009 to 2025, measured from daily minimum temperatures.
Elevation 1,181 ft, 35.236, -97.465. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | Mar 29 | Nov 5 |
| Earliest | Mar 7 (2015) | Oct 12 (2019) |
| Latest | May 3 (2013) | Nov 22 (2024) |
| Trend | 3.7 days later per decade | 2.6 days earlier per decade |
| Years with data | 16 | 17 |
At 28°F (hard freeze) the median last spring date is Mar 13 and the median first fall date is Nov 12.
The trend is a straight-line fit through the years with a freeze. A positive spring trend means the last frost now comes later. Short or patchy records give noisy trends.
Chart
Last spring frost (32°F)
First fall frost (32°F)
Dots are single years. The gray line is the median, the green line the fitted trend.
Year by year
| Year | Last spring 32°F | First fall 32°F | Last spring 28°F | First fall 28°F |
|---|---|---|---|---|
| 2025 | Mar 16 | Nov 9 | Feb 23 | Nov 10 |
| 2024 | Mar 28 | Nov 22 | Feb 28 | Nov 26 |
| 2023 | Mar 19 | Oct 30 | Mar 19 | Oct 30 |
| 2022 | Apr 9 | Oct 19 | Mar 12 | Nov 12 |
| 2021 | Apr 21 | Nov 13 | Feb 23 | Nov 19 |
| 2020 | Apr 18 | Oct 26 | Mar 6 | Nov 30 |
| 2019 | Mar 31 | Oct 12 | Mar 16 | Oct 30 |
| 2018 | Apr 16 | Nov 9 | Apr 7 | Nov 9 |
| 2017 | Mar 15 | Oct 27 | Mar 2 | Oct 28 |
| 2016 | Apr 2 | Nov 19 | Mar 25 | Nov 19 |
| 2015 | Mar 7 | Nov 13 | Mar 6 | Nov 21 |
| 2014 | Apr 15 | Nov 1 | Mar 24 | Nov 11 |
| 2013 | May 3 | Nov 12 | Mar 26 | Nov 12 |
| 2012 | Mar 9 | Oct 27 | Feb 25 | Oct 28 |
| 2011 | Mar 15 | Nov 3 | Mar 15 | Nov 4 |
| 2010 | Mar 22 | Nov 5 | Mar 22 | Nov 25 |
| 2009 | no data | Nov 18 | no data | Nov 18 |
"none" means the station recorded no freeze at that threshold in that half of the year. "no data" means more than 10% of the season's daily readings were missing. Years with no usable data are left out. See the methodology for the rules, and the ZIP lookup for 1991 to 2020 frost probabilities.