Port Aransas, TX Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Port Aransas's primary NOAA station, PORT ARANSAS 32 NNE - 3 stations mapped to the area.
The climate verdict for Port Aransas
Warm-season cooling demand defines Port Aransas, Texas, running at more than twice its heating total. The NOAA normal records an annual average of 70°F. It scores 96/100 for climate comfort (excellent), putting it in the top third of station-mapped location scores and exceeding 96% of them.
- 70°F
- annual average temperature (NOAA normal)
- 96/100
- comfort score, above 96% of station-mapped location scores
- 39.6"
- yearly precipitation total
- 285 days
- frost-free days per growing season
Port Aransas: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00023906 · Port Aransas, TX 70°F mean · 39.6" precip
TEMP-HOT · RANK-WARM · PHOTO-FINISH · PRCP-MID · SWING-NARROW · COMF-TOP · LOAD-COOL · STN-MULTI · BOOK-FULL
- TEMP-HOT 70°F
- RANK-WARM #6,518
- PHOTO-FINISH ≈ Terrytown
- PRCP-MID 39.6"
- SWING-NARROW 29°F
- COMF-TOP 96/100
- LOAD-COOL 3,123 CDD
- STN-MULTI USW00023906
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Terrytown, LA (+ 0.1 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every TX station list.
- Port Aransas (this station) 70°F
- Cold Victoria Fire D…, TX 70°F
- Hot Terrytown, LA 70°F
- Near Thibodaux, LA 70°F
- Near Morgan City, LA 70°F
Port Aransas sits in Texas, the #4 hottest U.S. state at 66.2°F statewide annual average - see all 50 hottest states ranked by NOAA normals
Climate Living Index · Port Aransas
Port Aransas: 89/100 · grade A
Port Aransas publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Port Aransas, not an official NOAA rating. Rankings still use Comfort Score 96/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Frost-free season | 285 days/year | 98/100 · A |
| Annual temperature balance | 70.2°F · 2.7° from 67.5°F | 92/100 · A |
| Normal heat + freeze calendar | 70 calendar days | 85/100 · A |
| Precipitation balance | 39.6 in · 4.6 from 35 in | 84/100 · B |
Port Aransas · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Port Aransas is a temperate Köppen climate: Cfa
Coldest-month mean 53.8°F and warmest-month mean 82.8°F place this station in temperate, no dry season, hot summer climates (Cfa). Class Cfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, no dry season, hot summer.
- Köppen code
- Cfa
- Group
- Temperate
- Warmest month
- 82.8°F
- Coldest month
- 53.8°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · cooling-led station
Where Port Aransas sits across the climate record
Three NOAA fields for Port Aransas's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Top 5% warmest
- Among 6,861 stations, Port Aransas sits in the warmer third of annual means.
- Annual precipitation
- 57th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Narrower than 92%
- Warmest-to-coldest month gap for Port Aransas is compact versus 6,861 complete station-years.
How Port Aransas compares across U.S. station-mapped locations
Port Aransas's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
96 Top 4% score exceeds 96% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). Below this entry.
- 70–80: 650 station-mapped locations (11%). Below this entry.
- 80–90: 921 station-mapped locations (15%). Below this entry.
- 90–100: 564 station-mapped locations (9%). This entry sits in this band.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 66°F (19°C) | 42°F (5°C) | 54°F (12°C) | 2.9" | N/A | 6.4 | 0.0 |
| February | 69°F (21°C) | 48°F (9°C) | 58°F (15°C) | 1.8" | N/A | 3.3 | 0.0 |
| March | 74°F (23°C) | 55°F (13°C) | 65°F (18°C) | 2.0" | N/A | 0.8 | 0.1 |
| April | 79°F (26°C) | 61°F (16°C) | 70°F (21°C) | 2.4" | N/A | 0.1 | 0.8 |
| May | 85°F (29°C) | 69°F (21°C) | 77°F (25°C) | 3.3" | N/A | 0.0 | 1.9 |
| June | 89°F (32°C) | 74°F (23°C) | 82°F (28°C) | 6.2" | N/A | 0.0 | 16.6 |
| July | 91°F (33°C) | 74°F (24°C) | 83°F (28°C) | 2.9" | N/A | 0.0 | 24.5 |
| August | 92°F (33°C) | 74°F (23°C) | 83°F (28°C) | 3.6" | N/A | 0.0 | 27.8 |
| September | 89°F (32°C) | 71°F (22°C) | 80°F (27°C) | 4.5" | N/A | 0.0 | 15.8 |
| October | 83°F (28°C) | 61°F (16°C) | 72°F (22°C) | 4.7" | N/A | 0.2 | 2.3 |
| November | 75°F (24°C) | 53°F (11°C) | 64°F (18°C) | 3.0" | N/A | 1.9 | 0.1 |
| December | 68°F (20°C) | 45°F (7°C) | 56°F (13°C) | 2.4" | N/A | 4.8 | 0.0 |
The year, day by day
The year in Port Aransas runs from a mild 41°F around January 6 to 92°F at the peak near August 7, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from July 4 through September 11, covering 70 dates. The broader mild season, normal highs of 70°F or more, runs February 23 to December 4.
This counts calendar dates whose 1991–2020 normal high reaches 90°F. It is a smaller number than the 90°F+ day counts in the monthly table above, which measure how often the threshold was actually crossed in a typical year. A date can average 88°F and still exceed 90°F in half of all years.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 41°F around January 6.
Where the wet dates fall
The likeliest wet date is September 15, when 34% of years recorded at least a hundredth of an inch. The driest is July 29 at 16%. Summed across the calendar, that is about 94 wet dates a year.
The widest day
January 13 carries the biggest normal gap between afternoon and dawn, 25°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Port Aransas.
Where Port Aransas Stands Nationally
Heat is a defining feature of the normals calendar — the normal daily high reaches 90°F on roughly 70 days a year, more than four out of five ranked stations record.
Port Aransas earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall and snowfall
10.2 days with precipitation
8.5 days with precipitation
6.3 days with precipitation
5.5 days with precipitation
5.7 days with precipitation
7.5 days with precipitation
5.3 days with precipitation
6.7 days with precipitation
11.1 days with precipitation
7.9 days with precipitation
8.8 days with precipitation
10.2 days with precipitation
Port Aransas spreads its precipitation across the year
Neither half of the year dominates here: June through August take 32% of the annual total and December through February 18%, with neither reaching the 35% that would mark a distinct wet season. Port Aransas has no dry season to plan around, though it does carry an unusually narrow 29°F seasonal spread.
The gap between the wettest and driest month still matters: June averages 6.2" and February 1.8". The three wettest months together take 39% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
When it rains in Port Aransas, it arrives in quantity
39.6" of precipitation falls across only about 94 wet days here, averaging 0.42 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 94 a year, 26% of all days
- Average depth per wet day
- 0.42 inches
- Most wet days
- September, about 11
- Fewest wet days
- July, about 5
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Frost Dates & Growing Season
First Fall Freeze
December 2
50% probability date
Last Spring Freeze
February 20
50% probability date
Growing Season
285 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
1,192
Higher = more heating needed
Cooling Degree Days
3,123
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside TX closest to Port Aransas on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (70°F here).
- Roosevelt, AZ 70°F · 0.0°F off
- Superior, AZ 70°F · 0.0°F off
- Wittmann, AZ 70°F · 0.0°F off
- Baker, CA 70°F · 0.1°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (39.6" here), excluding temperature-peer places.
- Galena, IL 39.6" · 0.0" off
- Hastings, MI 39.6" · 0.0" off
- Lowden, IA 39.6" · 0.0" off
- Pittsburgh, PA 39.6" · 0.0" off
Data-derived climate profile
How Port Aransas's climate pattern fits together
cooling led · moderate · low swing
Warm-season load persists through a relatively even calendar in Port Aransas. Cooling totals 3,123 degree days, more than double the 1,192 heating measure, and the 29.0°F seasonal range is compact rather than sharply divided.
Port Aransas's 39.6 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Snowfall is not added to the interpretation because its annual value is missing. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
Temperature varies within a narrow 29.0°F band across the normal year. August and January mark the typical warm and cold ends of the calendar. The annual average is 70°F. Monthly rows still matter, but they refine a steady profile rather than reveal two climatic extremes.
The frost-free window extends for about 285 days. That is a long calendar measure, but it is not a forecast and does not combine heat, rainfall, soil, or local elevation into a planting recommendation.
These labels group NOAA 1991-2020 normals from Port Aransas's primary station, so the summer figures are a thirty-year average rather than a ceiling: individual years have run hotter and will again. For Port Aransas that means a descriptive range only — not an official NOAA classification and not a prediction for next summer.
Questions about Port Aransas's climate
How much rain does Port Aransas get? ▼
How many days above 90°F does Port Aransas get? ▼
How much energy does heating and cooling require in Port Aransas? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Port Aransas's primary station: PORT ARANSAS 32 NNE (USW00023906). 3 NOAA stations are mapped to the Port Aransas area; the primary station's record is used for consistency. For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 4858808). Match rule for Port Aransas: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Port Aransas comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.