USDA Hardiness Zone 10b
Frost Dates for 78597 — South Padre Island, Texas
NOAA 1991–2020 normals from S Padre Is, TX (5 ft), 5 miles southeast.
Updated
Frost is not a yearly event in South Padre Island: a night at or below 32°F came in 9% of the winters of 1991–2020 at S Padre Is, TX, and a 36°F night, cold enough for frost on exposed leaves, in 43%. There is no reliable "last frost date" here; most years have none.
- Winters with a freeze
- 9%
- Winters with 36°F
- 43%
- Coldest month low
- 55°F
- Hardiness zone
- 10b
32°F or below, 1991–2020
frost possible on leaves
average, January
35 to 40°F (1.7 to 4.4°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 0%
- Snow per year
- —
median, 1991–2020
median, 1991–2020
0 of 18 observed
NOAA normal
Frost risk by date in South Padre Island
At S Padre Is, TX, 5 miles southeast of South Padre Island, 9% of the winters of 1991–2020 had at least one night at or below 32°F, 2% reached 28°F. Even a 36°F night came in only 43% of winters. January is the month most likely to bring one: a 6% chance in a given year. 11 of the 351 other Texas stations behind this site's ZIP pages freeze in fewer than half of winters too.
Freeze probabilities 1991–2020 at S Padre Is, TX, from NOAA NCEI U.S. Climate Normals. Where a temperature is reached in fewer than 99.5% of years, the dates describe only the years that reach it. Not a forecast.
Frost risk on any date in 78597 →Compare South Padre Island with another place →
Weather by month in South Padre Island
August is the warmest month at S Padre Is, TX, averaging 90°F by day and 79°F at night; January is the coldest at 68°F and 55°F. Every month stays under a 10% chance of a 32°F night; January is the likeliest at 6%.
Warmth for growing adds up to 9,042 growing degree days a year (base 50°F), more than at 97% of the 351 Texas stations. 44% of them (3,953) have built up by the end of June, and August adds the most, 1,071.
| Month | High °F | Low °F | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|
| Jan | 68 | 55 | 6% | <1 | 365 |
| Feb | 71 | 57 | 3% | 0 | 404 |
| Mar | 75 | 63 | 0% | 0 | 576 |
| Apr | 79 | 69 | 0% | 0 | 717 |
| May | 84 | 74 | 0% | 0 | 905 |
| Jun | 88 | 78 | 0% | 0 | 986 |
| Jul | 89 | 79 | 0% | 0 | 1042 |
| Aug | 90 | 79 | 0% | 0 | 1071 |
| Sep | 89 | 77 | 0% | 0 | 987 |
| Oct | 85 | 73 | 0% | 0 | 894 |
| Nov | 78 | 65 | 0% | 0 | 644 |
| Dec | 72 | 57 | 0% | 0 | 452 |
Monthly normals 1991–2020 at S Padre Is, TX (5 ft), NOAA NCEI. "32°F night": chance of at least one in the month. GDD: growing degree days, base 50°F.
Compared with the next station
The nearest other station, Port Isabel, TX, 9 miles west of South Padre Island, has a 32°F night in 34% of winters against 9% here, and a coolest-month low 3°F colder (52°F).
When it snows in South Padre Island, Texas
Measurable snow is rare here: only 0 of 18 winters from 1991 to 2020 recorded 0.1 inch or more at S Padre Is, TX, 4.8 miles away, so there is no typical first-snow date to plan around.
Where these figures come from
ZIP 78597 is 5 miles from S Padre Is, TX, which stands at 5 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 78597 in zone 10b, the band where the coldest night of the year averaged 35 to 40°F (1.7 to 4.4°C) over 1991–2020; a zone describes winter lows, not frost dates.
Hardiness zone and temperature range: USDA Plant Hardiness Zone Map 2023 (USDA-ARS, Oregon State University), ZIP-code listing, unchanged. °C converted from °F by this site.
Thirty-year averages, not a forecast: check the forecast before planting out. How stations are matched and which pages are offered to search engines: methodology.