Port Isabel climate

Port Isabel Weather in April

NOAA 1991-2020 normals for Port Isabel, 10.3 km from Port Isabel

Average highs run from 78°F on April 1 to 83°F on April 30, and lows from 64°F to 70°F. Normal precipitation for the month is 1.59 in over about 4 wet days.

April day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Port Isabel, in °F, with the record for each date.406080100120151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

April at a glance

Average high
81°F
Average low
67°F
Precipitation
1.59 in
Record high
102°FApr 26, 2017
Record low
43°FApr 8, 2007
Chance of a freeze
0%
Days of 90°F or more
0.8
Daylight
12 h 26 min to 13 h 08 min
Cloud cover
61%
Humidity
86%
Dew point
68°F
Wind
14.8 mph

Every day of the month

A wet day has at least 0.01 inch of precipitation; snow means at least 0.1 inch of snowfall.

DateNormal highNormal lowRecord highRecord lowChance wetChance of snow
Apr 178°F64°F88°F 201149°F 201914%0%
Apr 278°F64°F94°F 201746°F 200514%0%
Apr 379°F64°F94°F 201252°F 201614%0%
Apr 479°F65°F100°F 201151°F 202414%0%
Apr 579°F65°F92°F 201250°F 200014%0%
Apr 679°F65°F100°F 202252°F 200914%0%
Apr 779°F65°F92°F 200645°F 200914%0%
Apr 880°F65°F91°F 200243°F 200713%0%
Apr 980°F66°F92°F 201150°F 200013%0%
Apr 1080°F66°F96°F 201346°F 200313%0%
Apr 1180°F66°F92°F 200155°F 202413%0%
Apr 1280°F66°F100°F 202054°F 200413%0%
Apr 1380°F67°F99°F 202250°F 200413%0%
Apr 1481°F67°F91°F 199953°F 200412%0%
Apr 1581°F67°F93°F 202351°F 201812%0%
Apr 1681°F67°F91°F 200255°F 201412%0%
Apr 1781°F67°F91°F 200648°F 199912%0%
Apr 1881°F68°F98°F 201356°F 202112%0%
Apr 1981°F68°F97°F 202050°F 201312%0%
Apr 2082°F68°F93°F 200048°F 201312%0%
Apr 2182°F68°F91°F 200256°F 200912%0%
Apr 2282°F68°F91°F 200956°F 201212%0%
Apr 2382°F69°F95°F 200058°F 201212%0%
Apr 2482°F69°F94°F 202052°F 201312%0%
Apr 2582°F69°F93°F 201557°F 201012%0%
Apr 2683°F69°F102°F 201754°F 200112%0%
Apr 2783°F69°F97°F 201462°F 200512%0%
Apr 2883°F70°F95°F 201755°F 200812%0%
Apr 2983°F70°F94°F 200250°F 200812%0%
Apr 3083°F70°F92°F 200254°F 201512%0%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Port Isabel, in percent, and of at least 0.1 inch of snowfall.0510151102030
  • Chance of a wet day
  • Chance of snowfall

Sunrise and sunset

Times for 2026, local time (CDT).

April 1
sunrise 7:20 AM, sunset 7:46 PM
April 30
sunrise 6:52 AM, sunset 8:00 PM

Every day of April: sun and moon

Other months

Sources

Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00417179 (Port Isabel), public domain. Records: NOAA GHCN-Daily, station USW00012957, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.