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 95340
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 95340 in zone 9a (the coldest night of a typical year: 20 to 25°F).
The nearest station, Merced station, CA, is 7 miles from the ZIP's center: its last spring frost comes after March 3 in half of years and after April 10 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Merced station, CA | 7 mi | 154 ft | March 3 | April 10 | November 24 | – |
| Merced, CAMerced Municipal Airport | 7 mi | 152 ft | February 26 | April 1 | November 25 | 9a |
| Turlock, CATurlock #2 | 27 mi | 103 ft | January 6 | January 31 | December 20 | 9b |
| Merced (23 mi WSW), CA | 27 mi | 78 ft | March 28 | April 27 | November 14 | 9a |
| Madera, CAMadera Municipal Airport | 29 mi | 253 ft | February 12 | March 17 | November 30 | 9b |
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 Merced station
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) | May 1 | April 17 | April 7 | March 6 | November 8 | October 21 |
| 32°F | April 10 | March 19 | March 3 | February 2 | November 24 | November 5 |
| 28°F (hard freeze) | March 11 | February 17 | February 2 | December 28 | December 11 | November 22 |
| 24°F | February 11 | January 22 | January 9 | December 16 | December 24 | December 2 |
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.