Frost dates for ZIP 77378 (Willis, 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, Conroe Montgomery Co AP, TX (9 miles away).
- Average last spring frostMar 1150% chance of a 32°F freeze after this date
- Average first fall frostNov 1950% chance of a 32°F freeze by this date
- Growing season (frost-free)253 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) | Feb 14 |
| 50% (the "average" last frost) | Mar 11 |
| 10% (safe-side: only 1 year in 10 freezes later) | Apr 3 |
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 1 |
| 50% (the "average" first frost) | Nov 19 |
| 90% (late: most years have frozen by now) | Dec 9 |
Light frost, freeze and hard freeze
| Threshold | Last spring (50%) | First fall (50%) |
|---|---|---|
| 36°F (light frost possible on clear, calm nights) | Mar 24 | Nov 8 |
| 32°F (freeze) | Mar 11 | Nov 19 |
| 28°F (hard freeze) | Feb 21 | Dec 4 |
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 Willis
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 (44 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 (44 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 | 49° | Mostly Clear | |
| Sunday | 73° | 51° | Sunny |
| Monday | 77° | 53° | Mostly Sunny |
| Tuesday | 81° | 56° | Sunny |
| Wednesday | 85° | 56° | Sunny |
| Thursday | 88° | 58° | Sunny |
| Friday | 88° | 59° | 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 77378
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: Conroe Montgomery Co AP, TX (NOAA GHCN-Daily ID USW00053902), elevation 245 ft, 8.6 miles from the ZIP's center point. NOAA completeness flag: R (representative, 10+ years).
Nearby stations
| Station | Distance | Last frost (50%) | First frost (50%) |
|---|---|---|---|
| Conroe, TX | 12 mi | Feb 24 | Dec 2 |
| Huntsville, TX | 18 mi | Mar 1 | Nov 28 |
| Cleveland, TX | 20 mi | Mar 7 | Nov 20 |
The average last-frost dates of these stations span 18 days, a rough guide to local variation. See data sources & methods.
Questions
When is the last frost in 77378?
The average (50% chance) last spring freeze of 32°F for ZIP 77378 is March 11. For a safer planting date, use April 3, when only 1 year in 10 still sees a later freeze.
When is the first frost in 77378?
The average first fall freeze is November 19. In 1 year in 10 it comes by November 1.
What hardiness zone is 77378?
ZIP 77378 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 Montgomery County
77301 77302 77303 77304 77306 77316 77318 77354 77355 77356 77357 77362 77365 77372 77380 77381 77382 77384 77385 77386 77873 All Montgomery County ZIPs