Frost dates for ZIP 77433 (Harris County, TX)

Average last spring and first fall frost dates with 10%, 50% and 90% odds, from NOAA's 1991–2020 climate normals for the nearest weather station, Houston Hooks Mem AP, TX (14 miles away).

Average last spring frostFeb 1950% chance of a 32°F freeze after this date
Average first fall frostDec 350% chance of a 32°F freeze by this date
Growing season (frost-free)290 daysmedian, 32°F threshold
USDA hardiness zone9a20 to 25°F avg. coldest night

Last spring frost odds

Chance of a 32°F freeze after this date	Date
90% (early: most years still freeze after this)	Jan 21
50% (the "average" last frost)	Feb 19
10% (safe-side: only 1 year in 10 freezes later)	Mar 15

Most gardeners plant frost-tender crops (tomatoes, peppers, basil) after the 50% date, and closer to the 10% date for less risk.

First fall frost odds

Chance the first 32°F freeze has happened by this date	Date
10% (early: 1 year in 10 freezes this soon)	Nov 13
50% (the "average" first frost)	Dec 3
90% (late: most years have frozen by now)	Jan 5 (next year)

Light frost, freeze and hard freeze

Threshold	Last spring (50%)	First fall (50%)
36°F (light frost possible on clear, calm nights)	Mar 7	Nov 19
32°F (freeze)	Feb 19	Dec 3
28°F (hard freeze)	Jan 31	Dec 29

n/a means NOAA did not publish a date at that threshold for this station (usually because it rarely gets that cold).

This week in 77433

Soil temperature now

2-inch depth

69°F 55°F or warmer
24-hour average · latest 70°F, as of Oct 17, 8:00 PM CDT

Estimate Not a measurement at this ZIP: distance-weighted average of Prairie View #1 (17 mi), Wied Ranch (55 mi), Wegenhoft (59 mi).

4-inch depth

72°F 55°F or warmer
24-hour average · latest 72°F, as of Oct 17, 8:00 PM CDT

Estimate Not a measurement at this ZIP: distance-weighted average of Prairie View #1 (17 mi), Wied Ranch (55 mi), Wegenhoft (59 mi).

Fall: Texas A&M AgriLife times fall pre-emergent (for winter weeds such as annual bluegrass) to soil cooling to about 70°F for several days. The 50–55°F band is the spring trigger. Always read and follow the product label.

7-day forecast and frost risk

No frost in the 7-day forecast.

Period	High	Low	Forecast
Tonight		51°	Mostly Clear
Sunday	74°	53°	Sunny
Monday	79°	57°	Mostly Sunny
Tuesday	82°	59°	Mostly Sunny
Wednesday	86°	58°	Sunny
Thursday	88°	60°	Sunny
Friday	89°	62°	Sunny

National Weather Service forecast, issued Oct 17, 8:28 PM CDT. Frost can form above 32°F on clear, calm nights. Full NWS forecast.

Where these numbers come from

Station: Houston Hooks Mem AP, TX (NOAA GHCN-Daily ID USW00053910), elevation 152 ft, 13.9 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).

Nearby stations

Station	Distance	Last frost (50%)	First frost (50%)
Houston Sugarland Mem, TX	23 mi	Feb 2	Dec 11
Sugar Land, TX	23 mi	Feb 9	Dec 13
Houston Intercont AP, TX	23 mi	Feb 13	Dec 9

The average last-frost dates of these stations span 17 days, a rough guide to local variation. See data sources & methods.

Questions

When is the last frost in 77433?

The average (50% chance) last spring freeze of 32°F for ZIP 77433 is February 19. For a safer planting date, use March 15, when only 1 year in 10 still sees a later freeze.

When is the first frost in 77433?

The average first fall freeze is December 3. In 1 year in 10 it comes by November 13.

What hardiness zone is 77433?

ZIP 77433 is in USDA zone 9a (20 to 25°F average coldest winter night), per the 2023 USDA Plant Hardiness Zone Map ZIP listing.

Other ZIP codes in Harris County

77002 77003 77004 77005 77006 77007 77008 77009 77010 77011 77012 77013 77014 77015 77016 77017 77018 77019 77020 77021 77022 77023 77024 77025 All Harris County ZIPs