Climate Port Isabel - Texas
| JanJa | FebFe | MarMa | AprAp | MayMa | JunJu | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 68 | 71 | 76 | 80 | 85 | 89 |
| Average low in ºF Av. low Lo | 52 | 55 | 60 | 67 | 73 | 76 |
| Av. precipitation in inch Av. precip. Pre. | 1.88 | 1.68 | 1.50 | 1.51 | 2.22 | 2.49 |
| JulJu | AugAu | SepSe | OctOc | NovNo | DecDe | |
|---|---|---|---|---|---|---|
| Average high in ºF Av. high Hi | 90 | 91 | 88 | 84 | 78 | 70 |
| Average low in ºF Av. low Lo | 77 | 77 | 74 | 69 | 62 | 53 |
| Av. precipitation in inch Av. precip. Pre. | 1.91 | 1.75 | 6.30 | 4.03 | 2.27 | 1.43 |
What is the average weather in Port Isabel, Texas?
Port Isabel experiences a humid subtropical climate, characterized by hot summers and mild winters. The area receives moderate precipitation annually, with a strong seasonal pattern that brings wetter conditions in the fall. Heavy seasonal downpours or afternoon thunderstorms can sometimes occur during the warmer months, contributing to the overall rainfall.
Port Isabel Climate Graph - Texas Climate Chart
Daily normals Port Isabel - Texas - January
Day | High ºF | Low ºF | Prec/mo inch | Prec/yr inch | Snow/mo inch | Snow/yr inch |
|---|---|---|---|---|---|---|
| 1 Jan | 68.5 | 51.3 | 0.05 | 0.05 | 0.00 | 0.00 |
| 2 Jan | 68.4 | 51.2 | 0.10 | 0.10 | 0.00 | 0.00 |
| 3 Jan | 68.4 | 51.2 | 0.15 | 0.15 | 0.00 | 0.00 |
| 4 Jan | 68.4 | 51.1 | 0.20 | 0.20 | 0.00 | 0.00 |
| 5 Jan | 68.3 | 51.1 | 0.25 | 0.25 | 0.00 | 0.00 |
| 6 Jan | 68.3 | 51.1 | 0.30 | 0.30 | 0.00 | 0.00 |
| 7 Jan | 68.3 | 51.0 | 0.34 | 0.34 | 0.00 | 0.00 |
| 8 Jan | 68.3 | 51.0 | 0.39 | 0.39 | 0.00 | 0.00 |
| 9 Jan | 68.3 | 51.0 | 0.43 | 0.43 | 0.00 | 0.00 |
| 10 Jan | 68.3 | 51.0 | 0.48 | 0.48 | 0.00 | 0.00 |
| 11 Jan | 68.4 | 51.1 | 0.52 | 0.52 | 0.00 | 0.00 |
| 12 Jan | 68.4 | 51.1 | 0.56 | 0.56 | 0.00 | 0.00 |
| 13 Jan | 68.4 | 51.1 | 0.61 | 0.61 | 0.00 | 0.00 |
| 14 Jan | 68.5 | 51.2 | 0.66 | 0.66 | 0.00 | 0.00 |
| 15 Jan | 68.5 | 51.2 | 0.70 | 0.70 | 0.00 | 0.00 |
| 16 Jan | 68.6 | 51.3 | 0.74 | 0.74 | 0.00 | 0.00 |
| 17 Jan | 68.7 | 51.4 | 0.77 | 0.77 | 0.00 | 0.00 |
| 18 Jan | 68.8 | 51.5 | 0.81 | 0.81 | 0.00 | 0.00 |
| 19 Jan | 68.9 | 51.6 | 0.85 | 0.85 | 0.00 | 0.00 |
| 20 Jan | 68.9 | 51.7 | 0.89 | 0.89 | 0.00 | 0.00 |
| 21 Jan | 69.1 | 51.8 | 0.94 | 0.94 | 0.00 | 0.00 |
| 22 Jan | 69.2 | 52.0 | 1.00 | 1.00 | 0.00 | 0.00 |
| 23 Jan | 69.3 | 52.1 | 1.05 | 1.05 | 0.00 | 0.00 |
| 24 Jan | 69.4 | 52.2 | 1.10 | 1.10 | 0.00 | 0.00 |
| 25 Jan | 69.5 | 52.4 | 1.15 | 1.15 | 0.00 | 0.00 |
| 26 Jan | 69.6 | 52.6 | 1.20 | 1.20 | 0.00 | 0.00 |
| 27 Jan | 69.8 | 52.7 | 1.25 | 1.25 | 0.00 | 0.00 |
| 28 Jan | 69.9 | 52.9 | 1.30 | 1.30 | 0.00 | 0.00 |
| 29 Jan | 70.0 | 53.1 | 1.35 | 1.35 | 0.00 | 0.00 |
| 30 Jan | 70.2 | 53.3 | 1.40 | 1.40 | 0.00 | 0.00 |
| 31 Jan | 70.3 | 53.5 | 1.45 | 1.45 | 0.00 | 0.00 |
Weather history Port Isabel - September 2026
| Day | High ºF | Low ºF | Precip. inch | Snow inch | Snow d. inch |
|---|---|---|---|---|---|
| 01 Sep | 95.0 | 79.0 | 0.00 | - | - |
| 02 Sep | 95.0 | 79.0 | 0.00 | - | - |
| 03 Sep | 96.1 | 80.1 | 0.00 | - | - |
| 04 Sep | 96.1 | 81.0 | 0.00 | - | - |
| 05 Sep | 93.9 | 80.1 | 0.00 | - | - |
| 06 Sep | 93.9 | 80.1 | 0.00 | - | - |
| 07 Sep | 93.9 | 77.0 | 0.31 | - | - |
| 08 Sep | 93.9 | 80.1 | 0.00 | - | - |
| 09 Sep | - | - | - | - | - |
| 10 Sep | - | - | - | - | - |
| 11 Sep | - | - | - | - | - |
| 12 Sep | - | - | - | - | - |
| 13 Sep | - | - | - | - | - |
| 14 Sep | - | - | - | - | - |
| 15 Sep | - | - | - | - | - |
| 16 Sep | - | - | - | - | - |
| 17 Sep | - | - | - | - | - |
| 18 Sep | - | - | - | - | - |
| 19 Sep | - | - | - | - | - |
| 20 Sep | - | - | - | - | - |
| 21 Sep | - | - | - | - | - |
| 22 Sep | - | - | - | - | - |
| 23 Sep | - | - | - | - | - |
| 24 Sep | - | - | - | - | - |
| 25 Sep | - | - | - | - | - |
| 26 Sep | - | - | - | - | - |
| 27 Sep | - | - | - | - | - |
| 28 Sep | - | - | - | - | - |
| 29 Sep | - | - | - | - | - |
| 30 Sep | - | - | - | - | - |
Past weather Port Isabel
| Sep 26 | Normal | ||
|---|---|---|---|
| Average high temperature Av. high temp. | 94.7 ºF | 68 ºF | |
| Average low temperature Av. low temp. | 79.6 ºF | 52 ºF | |
| Total precipitation Total precip. | 0.31 inch | 1.88 inch | |
| Total snowfall Total snowfall | - inch | 0 inch | |
| Highest max temperature Highest max temp. | 96.1 ºF | - | |
| Lowest max temperature Lowest max temp. | 93.9 ºF | - | |
| Highest min temperature Highest min temp. | 81.0 ºF | - | |
| Lowest min temperature Lowest min temp. | 77.0 ºF | - | |
Past weather September 2026 incomplete - Missing data
Geo Port Isabel - Texas
| Country | United States | |
|---|---|---|
| State | Texas | |
| County | Cameron | |
| City | Port Isabel | |
| Zip Code | 78578 | |
| Longitude | -97.21 dec. degr. | |
| Latitude | 26.07 dec. degr. | |
| Altitude - Elevation | 10ft | |
| ICAO | - | |
| IATA | - |
Date and Time Port Isabel - Texas
| Local Time | 06:51 AM | |
|---|---|---|
| Sunrise | 07:11 AM | |
| Sunset | 07:39 PM | |
| Day/Night | Night | |
| Timezone | Central Daylight Time | |
| Timezone DB | America - Chicago |
Map of Port Isabel - Texas
USGS National Map — Open interactive map
Port Isabel weather averages
| Annual high temperature | 81ºF |
| Annual low temperature | 66ºF |
| Average annual precip. | 28.97 inch |
Station Data
Monthly averages Port Isabel
Longitude: -97.2086, Latitude: 26.0734
Average weather Port Isabel, TX - 78578
Monthly: 1991-2020 normals
History: 1942-2026
Abbreviations
Average precipitation in : Av. precipitation in
Jan: January, Feb: February, ...Jan: January, Feb: February, ...Ja: January, Fe: February, ...