Frost dates by ZIP code: The nearest NOAA stations to your ZIP, 1991-2020 normals
Enter a five-digit ZIP code. PlainClimate finds its center (Census Bureau 2024) and the five nearest NOAA stations with frost dates, and shows each station's last spring and first autumn 32°F dates with its distance and elevation.
Frost dates near ZIP 95616
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 95616 in zone 9b (the coldest night of a typical year: 25 to 30°F).
The nearest station, Davis, CA, is 2 miles from the ZIP's center: its last spring frost comes after February 10 in half of years and after March 11 in one year in ten. By the USDA's method its plant hardiness zone is 9b.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Davis, CADavis 2 WSW Experiment Farm | 2 mi | 60 ft | February 10 | March 11 | December 1 | 9b |
| Woodland, CA1 mi WNW | 9 mi | 67 ft | February 7 | March 11 | December 5 | 9b |
| Winters, CA | 10 mi | 135 ft | February 18 | March 14 | November 30 | 9b |
| Lake Solano, CA | 12 mi | 187 ft | February 4 | March 9 | December 5 | 9b |
| Vacaville station, CA | 14 mi | 110 ft | January 31 | March 11 | December 11 | – |
Frost comes later in spring at higher and colder stations and earlier in low, open ground: prefer a station at a similar elevation to yours. Hardiness zone in the table: the USDA's rule (the average of each year's coldest night, 1991-2020) applied to the station's own record.
Every frost threshold at Davis
NOAA publishes the dates for several temperatures and odds. A 30% spring date means a 3-in-10 chance of a later frost (the convention almanacs use); 50% is the median; 10% the cautious date.
| Threshold | Spring, 10% | Spring, 30% | Spring, 50% | Spring, 90% | Autumn, 50% | Autumn, 10% |
|---|---|---|---|---|---|---|
| 36°F (light frost) | April 16 | April 3 | March 22 | February 22 | November 16 | November 1 |
| 32°F | March 11 | February 25 | February 10 | December 31 | December 1 | November 13 |
| 28°F (hard freeze) | February 8 | January 22 | January 6 | December 14 | December 18 | November 29 |
| 24°F | January 24 | January 6 | December 30 | December 9 | December 26 | December 5 |
Source: NOAA NCEI 1991-2020 annual normals; ZIP centers: Census Bureau 2024 Gazetteer; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. Autumn 10%: one year in ten has its first frost before this date.