Frost history / Bellevue, ID
Bellevue, ID: frost dates by year
Last spring and first fall frost at NOAA station USC00100774, 2014 to 2025, measured from daily minimum temperatures.
Elevation 5,192 ft, 43.467, -114.258. Download the data (JSON), NOAA daily records
Summary at 32°F
| Last spring frost | First fall frost | |
|---|---|---|
| Median | May 16 | Oct 1 |
| Earliest | May 3 (2018) | Sep 16 (2018) |
| Latest | Jun 21 (2023) | Nov 14 (2016) |
| Trend | 32.4 days later per decade | 12.4 days earlier per decade |
| Years with data | 11 | 12 |
At 28°F (hard freeze) the median last spring date is May 7 and the median first fall date is Oct 15.
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 | May 21 | Oct 12 | Apr 21 | Oct 20 |
| 2024 | Jun 18 | Sep 30 | May 23 | Oct 18 |
| 2023 | Jun 21 | Sep 29 | Jun 20 | Oct 26 |
| 2022 | Jun 14 | Oct 1 | May 10 | Oct 12 |
| 2021 | May 11 | Sep 29 | May 9 | Oct 12 |
| 2020 | May 7 | Oct 11 | May 7 | Oct 11 |
| 2019 | May 10 | Sep 30 | May 10 | Sep 30 |
| 2018 | May 3 | Sep 16 | Apr 18 | Oct 5 |
| 2017 | May 16 | Sep 23 | Mar 7 | Oct 12 |
| 2016 | May 22 | Nov 14 | Apr 16 | Nov 14 |
| 2015 | May 10 | Oct 27 | Apr 16 | Nov 4 |
| 2014 | no data | Oct 1 | no data | Oct 27 |
"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.