Last spring frost
Feb 21
Frost Dates for New Ulm, TX
First fall frost
Dec 1
Growing season
285 days
Hardiness zone
9a
In an average year around New Ulm, TX, the last spring frost (32°F) is about Feb 21 and the first fall frost is about Dec 1, giving roughly a 285-day growing season. To be safe most years, wait until Jan 22 before setting out tender plants.
Last spring frost
Dates the last frost of spring typically ends. Plant tender crops after the risk has passed for your comfort level.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Mar 30 | Mar 7 | Feb 15 |
| Freeze (32°F) | Mar 14 | Feb 21 | Jan 22 |
| Hard (28°F) | Mar 4 | Jan 30 | Dec 25 |
| Severe (24°F) | Feb 18 | Jan 14 | Dec 12 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Mar 30 | Mar 21 | Mar 15 | Mar 11 | Mar 7 | Mar 3 | Feb 28 | Feb 22 | Feb 15 |
| 32°F | Mar 14 | Mar 7 | Mar 1 | Feb 25 | Feb 21 | Feb 16 | Feb 8 | Jan 31 | Jan 22 |
| 28°F | Mar 4 | Feb 23 | Feb 14 | Feb 6 | Jan 30 | Jan 24 | Jan 16 | Jan 6 | Dec 25 |
| 24°F | Feb 18 | Feb 8 | Jan 31 | Jan 23 | Jan 14 | Jan 6 | Jan 1 | Dec 25 | Dec 12 |
| 20°F | Feb 5 | Jan 30 | Jan 23 | Jan 15 | Jan 9 | Jan 4 | Dec 31 | Dec 24 | Dec 15 |
First fall frost
Dates the first frost of fall typically arrives. Count back by a crop's days-to-maturity to know your planting cutoff.
| Frost intensity | Early (10%) | Average (50%) | Late (90%) |
|---|---|---|---|
| Light (36°F) | Nov 1 | Nov 18 | Dec 7 |
| Freeze (32°F) | Nov 10 | Dec 1 | Dec 28 |
| Hard (28°F) | Nov 21 | Dec 18 | Jan 26 |
| Severe (24°F) | Dec 4 | Jan 1 | Feb 5 |
Show full probability table (all thresholds & percentiles)
| °F | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F | Nov 1 | Nov 5 | Nov 10 | Nov 14 | Nov 18 | Nov 22 | Nov 27 | Dec 1 | Dec 7 |
| 32°F | Nov 10 | Nov 17 | Nov 22 | Nov 27 | Dec 1 | Dec 5 | Dec 10 | Dec 17 | Dec 28 |
| 28°F | Nov 21 | Nov 29 | Dec 4 | Dec 10 | Dec 18 | Dec 27 | Jan 1 | Jan 8 | Jan 26 |
| 24°F | Dec 4 | Dec 10 | Dec 19 | Dec 27 | Jan 1 | Jan 6 | Jan 12 | Jan 22 | Feb 5 |
| 20°F | Dec 14 | Dec 21 | Dec 28 | Jan 1 | Jan 4 | Jan 9 | Jan 18 | Jan 24 | Feb 2 |
Growing season is measured at 32°F with about 50% probability. Hardiness zone from the 2023 USDA map; frost normals from NOAA 1991-2020.
Where this data comes from
@endif These dates are computed from the nearest official weather station with long-term records: Eagle Lake Resch Ctr, Tx, about 12.5 miles away@if(!empty($station['elevation_ft'])), at 176 ft elevation. The further the station and the greater the elevation difference from your yard, the more your local frost timing can vary.
How we calculate these dates
Frost and freeze dates come from the NOAA 1991–2020 U.S. Climate Normals, the National Oceanic and Atmospheric Administration's 30-year averages for each weather station. A date shown at the 50% level is the median: in half of years the frost falls on or before it. The 10% and 90% columns show the early and late ends of the range, so you can plant on the odds you're comfortable with. These are long-term averages, not a forecast for this year - always check your local outlook before planting.
Source: NOAA National Centers for Environmental Information, 1991–2020 Climate Normals (public domain). Harman is not affiliated with or endorsed by NOAA.
Frequently asked questions
When is the last frost in New Ulm, TX?
On average, the last spring frost (32°F) around New Ulm, TX is about Feb 21. In cooler years it can run later, so for a safer bet many gardeners wait until Jan 22.
When is the first frost in the fall?
The first fall frost around New Ulm, TX typically arrives about Dec 1. Count back by a crop's days to maturity to find the latest date you can plant it.
When can I plant tomatoes and other tender crops?
Tender crops like tomatoes, peppers and basil are damaged by frost, so wait until the last spring frost has passed - around Feb 21 on average, or Jan 22 to be safe most years.
How long is the growing season here?
The frost-free growing season (between the last spring and first fall 32°F frost) is about 285 days in a typical year.
Are these dates a forecast for this year?
No. They are 30-year averages from the NOAA 1991–2020 Climate Normals, not a prediction for the current year. Use them for planning and always check your local weather forecast before planting or protecting crops.
Local weather for 78933 Planting calendar → Texas frost dates →
Data source: NOAA 1991–2020 Climate Normals · Page updated Aug 4, 2026