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 77069
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 77069 in zone 9b (the coldest night of a typical year: 25 to 30°F).
The nearest station, Houston Hooks Mem Airport, TX, is 6 miles from the ZIP's center: its last spring frost comes after February 19 in half of years and after March 15 in one year in ten. By the USDA's method its plant hardiness zone is 9a.
| Station | Distance | Elevation | Last frost (median) | 1 in 10 after | First frost (median) | Hardiness zone |
|---|---|---|---|---|---|---|
| Houston Hooks Mem Airport, TX | 6 mi | 152 ft | February 19 | March 15 | December 3 | 9a |
| Houston, TXHouston Intercontinental Airport | 10 mi | 95 ft | February 13 | March 12 | December 9 | 9b |
| Houston-Port, TX | 22 mi | 19 ft | February 2 | March 5 | December 25 | – |
| Conroe station, TX | 24 mi | 245 ft | February 24 | March 17 | December 2 | 9a |
| Conroe, TXConroe Montgomery County Airport | 26 mi | 245 ft | March 11 | April 3 | November 19 | 9a |
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 Hooks Mem Airport
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 29 | March 15 | March 7 | February 11 | November 19 | November 2 |
| 32°F | March 15 | March 1 | February 19 | January 21 | December 3 | November 13 |
| 28°F (hard freeze) | March 5 | February 14 | January 31 | December 28 | December 29 | December 2 |
| 24°F | February 23 | February 2 | January 17 | December 24 | January 6 | December 11 |
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.