Photo: Quintin Soloviev · CC BY 4.0Port Aransas has some of the mildest winter nights among U.S. towns
Midsummer highs settle at about 91°. Expect the heaviest rain or snow in September and the lightest in February. In July, afternoons here are warmer than in 80% of U.S. towns. For walks and days out, the stretch from October to April brings highs of 65–83°.
A year in Port Aransas at a glance
Each month’s typical high and low, and what it brings.
What stands out about Port Aransas’ climate
Compared with towns across the U.S., with Port Aransas’ place in Texas beside it.
What a year in Port Aransas feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Frost is rare
Frost and day counts come from NOAA’s station at Port Aransas, TX, 2.2 miles from the town’s center, at about the same height.
The 2023 USDA map puts Port Aransas’ center in zone 10a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 34°. Plant labels use the zone; frost dates tell you when to plant.
90° days by month
Average days at 90° or more
About 34 inches of rain a year
September is the wettest month and February the driest. Rain falls on about 81 days a year. Snow is rare: about 0.0" in a normal year at Port Aransas, TX, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Port Aransas
20% of the work is heating, so air conditioning is the bigger bill. No month averages under 55°.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Port Aransas, TX.
Living with Port Aransas’ climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
Zone 10a. Frost comes about 1 winter in 3, so tender plants can often stay out through winter.
Months with highs of 62–84° and lows of 40° or more: January, February, March, April, October, November and December. 17 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Port Aransas from natural hazards, hurricanes are the largest share (48%); heat waves, cold waves, winter storms and ice storms together are 5%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Port Aransas and its neighbors
Every town next door is within a degree of Port Aransas in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Port Aransas’, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Port Aransas, TX | 49° | 91° | 34" | 0.0" |
| Sierra Madre, CA | 43° | 90° | 28" | 0.0" |
| St. Simons, GA | 43° | 91° | 49" | 0.0" |
| Leesburg, FL | 47° | 91° | 50" | 0.0" |
| Grants Pass, OR | 34° | 90° | 33" | 0.9" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Port Aransas averaged 1.7° warmer than the 1900s. The biggest change is in February (+2.7°).
A bigger shift than in 74% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Port Aransas compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Port Aransas’ place among Texas’.
Port Aransas weather by month
Highs, lows and precipitation from NOAA’s grid at Port Aransas’ center; snow, wet days and snow on the ground from Port Aransas, TX. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 65° | 49° | 1.9" | 0.0" | 9 | 0 | 52° – 62° |
| February | 68° | 53° | 1.7" | 0.0" | 9 | 0 | 54° – 69° |
| March | 73° | 59° | 2.3" | 0.0" | 7 | 0 | 60° – 72° |
| April | 79° | 66° | 1.9" | 0.0" | 5 | 0 | 68° – 76° |
| May | 85° | 73° | 3.8" | 0.0" | 5 | 0 | 75° – 81° |
| June | 89° | 78° | 3.8" | 0.0" | 5 | 0 | 82° – 86° |
| July | 91° | 79° | 2.6" | 0.0" | 4 | 0 | 83° – 87° |
| August | 92° | 79° | 2.3" | 0.0" | 5 | 0 | 83° – 87° |
| September | 89° | 75° | 5.7" | 0.0" | 10 | 0 | 79° – 85° |
| October | 83° | 68° | 3.6" | 0.0" | 7 | 0 | 73° – 80° |
| November | 74° | 59° | 2.6" | 0.0" | 7 | 0 | 61° – 72° |
| December | 68° | 52° | 1.8" | 0.0" | 8 | 0 | 53° – 64° |
| Year | 80° | 66° | 33.9" | 0.0" | 81 | 0 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 54° to 69°. August is the most reliable, staying within 4°.
Where Port Aransas’ numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Port Aransas’ center.
- Snow: Port Aransas, TX.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Port Aransas, TX, 2.2 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Port Aransas’ climate
What is the weather like in Port Aransas?
A typical July afternoon reaches 91°, a January night drops to 49°, and snow is almost unheard of. Milder January nights than 96% of U.S. towns; hotter July afternoons than 80% of U.S. towns.
How cold does it get in Port Aransas in winter?
January nights average 49°. A night at 32° or below comes in only some winters (0.8 a year on average). In the coldest January of the last 30 years the month averaged 52°.
How much snow does Port Aransas get?
About 0.0 inches in a normal winter at Port Aransas, TX, so most winters see none.
How hot does it get in Port Aransas?
July, with a typical high of 91° and a low of 79°. About 57 days a year reach 90° (Port Aransas, TX).
When is the first and last frost in Port Aransas?
Most years have no frost at all: a 32° night comes in about 37% of winters at Port Aransas, TX, usually in December or January.
What growing zone is Port Aransas in?
Zone 10a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 34°.
What is the best time of year to visit Port Aransas?
By one simple rule (highs of 62–84° and lows of 40° or more), January, February, March, April, October, November and December. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Port Aransas getting warmer?
Yes: 1991–2020 averaged 1.7° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 74% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Port Aransas.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.