Frost dates for ZIP 77033 (Houston, 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 Hobby AP, TX (4 miles away).
Freezes are uncommon here
NOAA's normals for this station show a 32°F night in about 86% of years (about 4 freezing night(s) a year on average). The dates below describe freeze timing for the station's record; in many years there may be no 32°F freeze at all.
- Average last spring frostJan 3050% chance of a 32°F freeze after this date
- Average first fall frostDec 2850% chance of a 32°F freeze by this date
- Growing season (frost-free)330 daysmedian, 32°F threshold
- USDA hardiness zone9b25 to 30°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) | Dec 29 (prior Dec) |
| 50% (the "average" last frost) | Jan 30 |
| 10% (safe-side: only 1 year in 10 freezes later) | Mar 1 |
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 27 |
| 50% (the "average" first frost) | Dec 28 |
| 90% (late: most years have frozen by now) | Jan 27 (next year) |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Feb 17 | Dec 4 |
| 32°F (freeze) | Jan 30 | Dec 28 |
| 28°F (hard freeze) | Jan 17 | Jan 8 (next year) |
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 Houston
Soil temperature now
2-inch depth
68°F 55°F or warmer
24-hour average · latest 69°F, as of Oct 17, 8:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Prairie View #1 (48 mi).
4-inch depth
71°F 55°F or warmer
24-hour average · latest 71°F, as of Oct 17, 8:00 PM CDT
Estimate Not a measurement at this ZIP: distance-weighted average of Prairie View #1 (48 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 | 54° | Mostly Clear | |
| Sunday | 74° | 58° | Sunny |
| Monday | 80° | 62° | Mostly Sunny |
| Tuesday | 82° | 63° | Mostly Sunny |
| Wednesday | 86° | 62° | Sunny |
| Thursday | 88° | 63° | Sunny |
| Friday | 89° | 66° | 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.
Free frost alerts for 77033
An email when the National Weather Service forecasts a freeze for this ZIP, plus the spring soil-temperature heads-up. At most a few a month.
Alerts open soon. This form is a preview and doesn't send anything yet.
Where these numbers come from
Station: Houston Hobby AP, TX (NOAA GHCN-Daily ID USW00012918), elevation 44 ft, 4.0 miles from the ZIP's center point. NOAA completeness flag: S (standard, 24+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Houston-port, TX | 6 mi | Feb 2 | Dec 25 |
| Houston Clover Fld, TX | 12 mi | Jan 31 | Dec 27 |
| Houston Sugarland Mem, TX | 19 mi | Feb 2 | Dec 11 |
The average last-frost dates of these stations span 3 days, a rough guide to local variation. See data sources & methods.
Questions
When is the last frost in 77033?
The average (50% chance) last spring freeze of 32°F for ZIP 77033 is January 30. For a safer planting date, use March 1, when only 1 year in 10 still sees a later freeze.
When is the first frost in 77033?
The average first fall freeze is December 28. In 1 year in 10 it comes by November 27.
What hardiness zone is 77033?
ZIP 77033 is in USDA zone 9b (25 to 30°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