Port O'connor, TX Climate: Temperature by Month
Temperature and precipitation from NOAA NCEI 1991–2020 normals →, plus PlainClimate's derived comfort score
30-year climate normals (1991-2020) from Port O'connor's primary NOAA station, PORT O'CONNOR.
The climate verdict for Port O'connor
Warm-season cooling demand defines Port O'connor, Texas, running at more than twice its heating total. The NOAA normal records an annual average of 72°F. August is the warmest month at 85°F and January the coldest at 56°F.
- 72°F
- annual average temperature (NOAA normal)
- 326 days
- frost-free days per growing season
Port O'connor: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00417186 · Port O'connor, TX 72°F mean
TEMP-HOT · RANK-WARM · PHOTO-FINISH · PRCP-UNK · SWING-NARROW · COMF-UNK · LOAD-COOL · STN-1 · BOOK-PART
- TEMP-HOT 72°F
- RANK-WARM #6,587
- PHOTO-FINISH ≈ Galveston
- PRCP-UNK Rain n/a
- SWING-NARROW 29°F
- COMF-UNK Comfort n/a
- LOAD-COOL 3,301 CDD
- STN-1 USC00417186
- BOOK-PART 4/6 fields
Nearest mean-temperature peer: Galveston, TX ( -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 O'connor (this station) 72°F
- Hot C C Botanical G…, TX 72°F
- Cold Refugio, TX 71°F
- Near Galveston, TX 71°F
- Near Live Oak, FL 71°F
Port O'connor 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 O'connor
Port O'connor: 93/100 · grade A
Port O'connor publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Port O'connor, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Frost-free season | 326 days/year | 100/100 · A |
| Normal heat + freeze calendar | 29 calendar days | 96/100 · A |
| Annual temperature balance | 71.5°F · 4.0° from 67.5°F | 88/100 · A |
Port O'connor · 2026-08-04 · NOAA NCEI Climate Normals · method .
National standing · cooling-led station
Where Port O'connor sits across the climate record
Available NOAA 1991–2020 fields for Port O'connor are ranked only against stations that publish the same field, missing metrics stay blank rather than estimated.
- Annual temperature
- Top 4% warmest
- Among 6,861 stations, Port O'connor sits in the warmer third of annual means.
- Seasonal temperature swing
- Narrower than 92%
- Warmest-to-coldest month gap for Port O'connor is compact versus 6,861 complete station-years.
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 65°F (18°C) | 47°F (8°C) | 56°F (13°C) | N/A | 1.1 | 0.0 |
| February | 67°F (19°C) | 50°F (10°C) | 59°F (15°C) | N/A | 1.4 | 0.0 |
| March | 72°F (22°C) | 57°F (14°C) | 65°F (18°C) | N/A | 0.2 | 0.0 |
| April | 77°F (25°C) | 64°F (18°C) | 71°F (21°C) | N/A | 0.0 | 0.3 |
| May | 82°F (28°C) | 72°F (22°C) | 77°F (25°C) | N/A | 0.0 | 2.3 |
| June | 87°F (31°C) | 77°F (25°C) | 82°F (28°C) | N/A | 0.0 | 8.3 |
| July | 89°F (32°C) | 79°F (26°C) | 84°F (29°C) | N/A | 0.0 | 10.9 |
| August | 90°F (32°C) | 79°F (26°C) | 85°F (29°C) | N/A | 0.0 | 20.0 |
| September | 88°F (31°C) | 76°F (24°C) | 82°F (28°C) | N/A | 0.0 | 11.5 |
| October | 84°F (29°C) | 68°F (20°C) | 76°F (24°C) | N/A | 0.0 | 3.7 |
| November | 75°F (24°C) | 55°F (13°C) | 65°F (18°C) | N/A | 0.1 | 0.1 |
| December | 68°F (20°C) | 49°F (9°C) | 59°F (15°C) | N/A | 1.0 | 0.0 |
The year, day by day
The year in Port O'connor runs from a mild 47°F around January 15 to 91°F at the peak near August 15, and the normal low never reaches freezing on any date in the record.
When the heat sits
Normal highs reach 90°F from August 5 through September 2, covering 29 dates. The broader mild season, normal highs of 70°F or more, runs March 5 to December 5.
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 47°F around January 15.
The widest day
November 22 carries the biggest normal gap between afternoon and dawn, 21°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Port O'connor.
Where Port O'connor Stands Nationally
Among the steadiest day-night climates ranked: even the widest normal daily swing holds to roughly 21°F.
Port O'connor 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
Frost Dates & Growing Season
First Fall Freeze
December 27
50% probability date
Last Spring Freeze
February 4
50% probability date
Growing Season
326 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
908
Higher = more heating needed
Cooling Degree Days
3,301
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside TX closest to Port O'connor 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 (72°F here).
- Daytona Beach, FL 72°F · 0.0°F off
- Jacksonville Beach, FL 71°F · 0.1°F off
- Palm Coast, FL 71°F · 0.1°F off
- Scottsmoor, FL 71°F · 0.1°F off
Data-derived climate profile
How Port O'connor's climate pattern fits together
cooling led · low swing
Warm-season load persists through a relatively even calendar in Port O'connor. Cooling totals 3,301 degree days, more than double the 908 heating measure, and the 28.9°F seasonal range is compact rather than sharply divided.
A moisture-range label is withheld because Port O'connor's annual precipitation total is unavailable. Monthly source values remain visible where NOAA provides them, and no annual amount is reconstructed from incomplete data.
Temperature varies within a narrow 28.9°F band across the normal year. August and January mark the typical warm and cold ends of the calendar. The annual average is 72°F. Monthly rows still matter, but they refine a steady profile rather than reveal two climatic extremes.
The frost-free window extends for about 326 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 O'connor'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 O'connor that means a descriptive range only — not an official NOAA classification and not a prediction for next summer.
Questions about Port O'connor's climate
How many days above 90°F does Port O'connor get? ▼
How much energy does heating and cooling require in Port O'connor? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Port O'connor's primary station: PORT O'CONNOR (USC00417186). 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 a census-designated place (GEOID 4858952), not an incorporated municipality. Match rule for Port O'connor: 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 O'connor 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.