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 77384
The USDA's 2023 Plant Hardiness Zone Map puts ZIP 77384 in zone 9a (the coldest night of a typical year: 20 to 25°F).
The nearest station, Conroe station, TX, is 7 miles from the ZIP's center: its last spring frost comes after February 24 in half of years and after March 17 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 |
|---|---|---|---|---|---|---|
| Conroe station, TX | 7 mi | 245 ft | February 24 | March 17 | December 2 | 9a |
| Conroe, TXConroe Montgomery County Airport | 10 mi | 245 ft | March 11 | April 3 | November 19 | 9a |
| Houston Hooks Mem Airport, TX | 12 mi | 152 ft | February 19 | March 15 | December 3 | 9a |
| Houston, TXHouston Intercontinental Airport | 19 mi | 95 ft | February 13 | March 12 | December 9 | 9b |
| Cleveland, TX | 26 mi | 196 ft | March 7 | March 29 | November 20 | 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 Conroe 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) | March 31 | March 19 | March 9 | February 16 | November 20 | November 2 |
| 32°F | March 17 | March 4 | February 24 | January 26 | December 2 | November 11 |
| 28°F (hard freeze) | March 6 | February 19 | February 2 | December 31 | December 23 | November 24 |
| 24°F | March 1 | February 5 | January 22 | December 26 | January 5 | December 7 |
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.