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 77017
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 77017 in zone 9b (the coldest night of a typical year: 25 to 30°F).
The nearest station, Houston-Port, TX, is 4 miles from the ZIP's center: its last spring frost comes after February 2 in half of years and after March 5 in one year in ten.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Houston-Port, TX | 4 mi | 19 ft | February 2 | March 5 | December 25 | – |
| Houston Hobby Airport, TX | 4 mi | 44 ft | January 30 | March 1 | December 28 | 9b |
| Houston Clover Field, TX | 12 mi | 44 ft | January 31 | March 5 | December 27 | 9b |
| League City, TXHouston Nwso | 18 mi | 19 ft | January 31 | March 5 | December 14 | 9b |
| Houston, TXHouston Intercontinental Airport | 21 mi | 95 ft | February 13 | March 12 | December 9 | 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 Houston-Port
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) | March 16 | March 4 | February 24 | January 22 | December 2 | November 12 |
| 32°F | March 5 | February 18 | February 2 | December 31 | December 25 | November 27 |
| 28°F (hard freeze) | February 25 | February 2 | January 23 | December 24 | January 5 | December 8 |
| 24°F | February 16 | January 28 | January 15 | December 29 | January 10 | December 25 |
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.