USDA Hardiness Zone 10a
Frost Dates for 78566 — Los Fresnos, Texas
NOAA 1991–2020 normals from Port Isabel Cameron Airport, TX (19 ft), 7 miles northeast.
Updated
Frost is not a yearly event in Los Fresnos: a night at or below 32°F came in 35% of the winters of 1991–2020 at Port Isabel Cameron Airport, TX, and a 36°F night, cold enough for frost on exposed leaves, in 80%. There is no reliable "last frost date" here; most years have none.
- Winters with a freeze
- 35%
- Winters with 36°F
- 80%
- Coldest month low
- 52°F
- Hardiness zone
- 10a
32°F or below, 1991–2020
frost possible on leaves
average, January
30 to 35°F (-1.1 to 1.7°C) coldest night
- First snow
- Rare
- Last snow
- Rare
- Winters with snow
- 5%
- Snow per year
- 0.2"
median, 1991–2020
median, 1991–2020
1 of 20 observed
NOAA normal
Frost risk by date in Los Fresnos
At Port Isabel Cameron Airport, TX, 7 miles northeast of Los Fresnos, 35% of the winters of 1991–2020 had at least one night at or below 32°F, 7% reached 28°F. Nights of 36°F, enough for frost on exposed leaves, are more common (80% of winters) and, when they come, fall between about December 29 and January 22. January is the month most likely to bring one: a 19% 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.
| Low | 90% | 80% | 70% | 60% | 50% | 40% | 30% | 20% | 10% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F80% of yrs | Dec 20 | Jan 1 | Jan 7 | Jan 14 | Jan 22 | Jan 28 | Feb 4 | Feb 15 | Feb 26 |
| 32°F35% of yrs | too rare for a date | ||||||||
| 28°F7% of yrs | too rare for a date | ||||||||
| Low | 10% | 20% | 30% | 40% | 50% | 60% | 70% | 80% | 90% |
|---|---|---|---|---|---|---|---|---|---|
| 36°F80% of yrs | Dec 1 | Dec 8 | Dec 16 | Dec 22 | Dec 29 | Jan 3 | Jan 7 | Jan 15 | Jan 31 |
| 32°F35% of yrs | too rare for a date | ||||||||
| 28°F7% of yrs | too rare for a date | ||||||||
Freeze probabilities 1991–2020 at Port Isabel Cameron Airport, 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 78566 →Compare Los Fresnos with another place →
Weather by month in Los Fresnos
August is the warmest month at Port Isabel Cameron Airport, TX, averaging 93°F by day and 77°F at night; January is the coldest at 70°F and 52°F. From February to November the chance of a 32°F night stays under 10% each month.
Warmth for growing adds up to 9,122 growing degree days a year (base 50°F), more than at 97% of the 351 Texas stations. 45% of them (4,128) have built up by the end of June, and August adds the most, 1,097. Precipitation totals 23.3 inches a year, most in September (5.3") and least in January (1.0"); May to September bring 55% of it.
| Month | High °F | Low °F | Precip. in | 32°F night | Nights ≤ 32°F | GDD 50°F |
|---|---|---|---|---|---|---|
| Jan | 70 | 52 | 1.0 | 19% | 1 | 358 |
| Feb | 74 | 56 | 1.2 | 6% | <1 | 420 |
| Mar | 78 | 62 | 1.1 | 0% | 0 | 616 |
| Apr | 83 | 68 | 1.3 | 0% | 0 | 758 |
| May | 88 | 73 | 2.1 | 0% | 0 | 949 |
| Jun | 92 | 77 | 2.7 | 0% | 0 | 1028 |
| Jul | 92 | 78 | 1.4 | 0% | 0 | 1088 |
| Aug | 93 | 77 | 1.3 | 0% | 0 | 1097 |
| Sep | 90 | 75 | 5.3 | 0% | 0 | 980 |
| Oct | 85 | 69 | 2.7 | 0% | 0 | 835 |
| Nov | 78 | 61 | 1.9 | 0% | 0 | 582 |
| Dec | 72 | 54 | 1.3 | 14% | <1 | 412 |
Monthly normals 1991–2020 at Port Isabel Cameron Airport, TX (19 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, 8 miles east of Los Fresnos, has a 32°F night in 34% of winters against 35% here, and the same coolest-month low, 52°F.
When it snows in Los Fresnos, Texas
Measurable snow is rare here: only 1 of 20 winters from 1991 to 2020 recorded 0.1 inch or more at Port Isabel, TX, 8.1 miles away, so there is no typical first-snow date to plan around.
Where these figures come from
ZIP 78566 is 7 miles from Port Isabel Cameron Airport, TX, which stands at 19 feet, the nearest NOAA station that publishes freeze probabilities for 1991–2020. The 2023 USDA Plant Hardiness Zone Map lists ZIP 78566 in zone 10a, the band where the coldest night of the year averaged 30 to 35°F (-1.1 to 1.7°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.