Weather in Port Isabel, TX
Port Isabel, Sunday, 9 August, 03:42
Partly cloudy. Feels like 92°. High 92°, low 81°.
Monthly outlook for Port Isabel, TX: average high 90.4°, average low 81.3°. That is 1.4° above the climate normal for August. Precipitation is expected on 2 days (about 0.2 inches), against a normal of 5 days and 1.2 inches. The warmest day looks like 9 August (91.6°), the coolest 17 August (79.1°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 August – 18 August | 90.2° | 87.9° | +1.3° |
| 19 August – 28 August | 90.7° | 87.3° | +1.9° |
| 29 August – 7 September | at normal | 86.6° | — |
August records over 66 years
Climate normals and records are computed from the nearest reference point — Laguna Heights (2 mi).
0.02
Port Isabel, Monday, 10 August
Light rain. High 90°, low 80°.
0
Port Isabel, Tuesday, 11 August
Clear. High 90°, low 81°.
0Port Isabel, Wednesday, 12 August
Clear. High 90°, low 82°.
0
Port Isabel, Thursday, 13 August
Overcast. High 90°, low 83°.
0Port Isabel, Friday, 14 August
Overcast. High 90°, low 82°.
0.02Port Isabel, Saturday, 15 August
Light rain. High 90°, low 83°.
0Port Isabel, Sunday, 16 August
Clear. High 90°, low 82°.
0Port Isabel, Monday, 17 August
Clear. High 89°, low 79°.
0Port Isabel, Tuesday, 18 August
Overcast. High 90°, low 81°.
0Port Isabel, Wednesday, 19 August
Clear. High 90°, low 81°.
0Port Isabel, Thursday, 20 August
Clear. High 91°, low 81°.
0Port Isabel, Friday, 21 August
Clear. High 91°, low 81°.
0.01Port Isabel, Saturday, 22 August
Light rain. High 91°, low 82°.
0.03Port Isabel, Sunday, 23 August
Light rain. High 91°, low 81°.
0.04Port Isabel, Monday, 24 August
Light rain. High 90°, low 82°.
0.09
Port Isabel, Tuesday, 25 August
Climate normal for this date — 60-year average.
0.09Port Isabel, Wednesday, 26 August
Climate normal for this date — 60-year average.
0.11Port Isabel, Thursday, 27 August
Climate normal for this date — 60-year average.
0.15Port Isabel, Friday, 28 August
Climate normal for this date — 60-year average.
0.14Port Isabel, Saturday, 29 August
Climate normal for this date — 60-year average.
0.11Port Isabel, Sunday, 30 August
Climate normal for this date — 60-year average.
0.14Port Isabel, Monday, 31 August
Climate normal for this date — 60-year average.
0.15Port Isabel, Tuesday, 1 September
Climate normal for this date — 60-year average.
0.12Port Isabel, Wednesday, 2 September
Climate normal for this date — 60-year average.
0.18Port Isabel, Thursday, 3 September
Climate normal for this date — 60-year average.
0.19Port Isabel, Friday, 4 September
Climate normal for this date — 60-year average.
0.15Port Isabel, Saturday, 5 September
Climate normal for this date — 60-year average.
0.15Port Isabel, Sunday, 6 September
Climate normal for this date — 60-year average.
0.18Port Isabel, Monday, 7 September
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Port Isabel, TX are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Port Isabel, TX since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
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