When is the last frost in Three Rivers, TX?

For ZIP code 78071, the average last spring frost (32°F) is February 8, based on NOAA 1991-2020 climate normals for the Choke Canyon Dam, TX weather station. There is a 1-in-10 chance of a frost after March 8.

When is the first frost in Three Rivers, TX?

The average first fall frost (32°F) is December 6. There is a 1-in-10 chance of frost by November 17, so tender plants are at risk from that point on.

How long is the growing season in 78071?

In half of years, the frost-free season (between the last and first 32°F frost) is at least 302 days long.

Are these frost dates a forecast?

No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.

Frost dates for 78071Three Rivers, TX

The average last spring frost in Three Rivers is February 8 and the average first fall frost is December 6, giving a typical growing season of about 302 days. Dates are based on NOAA 1991-2020 climate normals.

Average last spring frost: Feb 8
Average first fall frost: Dec 6
Growing season: 302 days

Frost risk by date

NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.

Spring dates: chance of a frost AFTER the date. Fall dates: chance of a frost BEFORE the date.
Temperature	Last spring: 90% / 50% / 10% chance	First fall: 10% / 50% / 90% chance	Growing season (50%)	Years with at least one
Light frost (36°F)	Feb 2 · Feb 28 · Mar 24	Nov 5 · Nov 24 · Dec 14	270 days	100%
Frost / freeze (32°F)	Jan 1 · Feb 8 · Mar 8	Nov 17 · Dec 6 · Jan 6	302 days	99%
Hard freeze (28°F)	Dec 16 · Jan 23 · Feb 28	Nov 28 · Dec 25 · Feb 1	337 days	78%

Where these dates come from

ZIP code 78071 is matched to the NOAA station Choke Canyon Dam, TX, 7.3 km away, at 230 ft elevation (66 ft higher than the ZIP code's center). Nearby stations for comparison:

Station	Elevation	Avg last frost	Avg first frost
Choke Canyon Dam, TX (used)	230 ft	Feb 8	Dec 6
Calliham, TX	218 ft	Feb 9	Dec 8
Tilden 4 Sse, TX	345 ft	Feb 13	Dec 3
Cross, TX	285 ft	Mar 8	Nov 17

Frost dates near Three Rivers

Oakville, TX 78060 · last Feb 8, first Dec 6
Calliham, TX 78007 · last Feb 9, first Dec 8
George West, TX 78022 · last Feb 8, first Dec 6
Whitsett, TX 78075 · last Feb 8, first Dec 6
Mineral, TX 78125 · last Feb 17, first Dec 8
Pawnee, TX 78145 · last Feb 8, first Dec 6
Peggy, TX 78062 · last Feb 8, first Dec 6
Campbellton, TX 78008 · last Feb 27, first Nov 28

Frequently asked questions

When is the last frost in Three Rivers, TX?: For ZIP code 78071, the average last spring frost (32°F) is February 8, based on NOAA 1991-2020 climate normals for the Choke Canyon Dam, TX weather station. There is a 1-in-10 chance of a frost after March 8.
When is the first frost in Three Rivers, TX?: The average first fall frost (32°F) is December 6. There is a 1-in-10 chance of frost by November 17, so tender plants are at risk from that point on.
How long is the growing season in 78071?: In half of years, the frost-free season (between the last and first 32°F frost) is at least 302 days long.
Are these frost dates a forecast?: No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.