SEBASTIAN, TX 78594 Weather Forecast & Current Conditions

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HARLINGEN, TX
Current Weather

2:52 AM CDT AUG 27, 2025
Clear
75°F
Feels Like: 75°F
Dewpoint: 75°F
Rel. Hum.: 100%
Visibility: 10 miles
Wind: ESE at 5 mph
Pressure: 30.04 inches
Last 72 hours

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SEBASTIAN, TX 78594
Weather Forecast

Snowfall Forecast pages
Snow Depth pages
TODAY
Mostly sunny. A chance of showers and thunderstorms this afternoon. Highs in the mid 90s. Temperature falling into the upper 80s this afternoon. Southeast winds 5 to 10 mph. Chance of rain 40 percent. Heat index values up to 107.
TONIGHT
Mostly clear. Humid with lows in the mid 70s. Southeast winds 5 to 10 mph.
THURSDAY
Sunny with highs in the mid 90s. Southeast winds 5 to 10 mph. Heat index values up to 107.
THURSDAY NIGHT
Mostly clear. Humid with lows in the mid 70s. Southeast winds 5 to 10 mph.
FRIDAY
Sunny with highs in the upper 90s. Southeast winds 5 to 10 mph. Heat index values up to 109.
FRIDAY NIGHT THROUGH SATURDAY NIGHT
Mostly clear. Lows in the upper 70s. Highs in the upper 90s. Heat index values up to 110.
SUNDAY
Mostly sunny with a chance of showers and thunderstorms. Highs in the mid 90s. Chance of rain 50 percent. Heat index values up to 105.
SUNDAY NIGHT
Partly cloudy. A chance of showers after midnight. Lows in the mid 70s. Chance of rain 50 percent.
LABOR DAY
Mostly sunny with a chance of showers. A chance of thunderstorms in the afternoon. Highs in the mid 90s. Chance of rain 50 percent.
MONDAY NIGHT
Partly cloudy in the evening, then becoming mostly clear. Lows in the mid 70s.
TUESDAY
Mostly sunny. A chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. Chance of rain 30 percent.

Visible Weather Satellite
SEBASTIAN, TX 78594
Infrared Weather Satellite
SEBASTIAN, TX 78594
NEXRAD Weather Radar
SEBASTIAN, TX 78594

HARLINGEN, TX 3 hourly weather forecast

weather forecast created  8:00 PM EDT  8/26/2025
Wednesday
27 AUG 2025
SEBASTIAN, TX 78594 weather forecast Day 1, 0 hours 1 AM 79° 83° Partly Cloudy 1%

0% Thunder
( 4% severe)
SE   6 94% 77°
Low 76° SEBASTIAN, TX 78594 weather forecast Day 1, 3 hours 4 AM 77° 78° Partly Cloudy SE   5 94% 75°
High 95° SEBASTIAN, TX 78594 weather forecast Day 1, 6 hours 7 AM 77° 78° Partly Cloudy 17%
RAIN
<.01 in
0% Thunder
( 18% severe)
ESE   3 94% 75°

Partly Cloudy

Chance of Rain

SEBASTIAN, TX 78594 weather forecast Day 1, 9 hours 10 AM 87° 99° Partly Cloudy SSE   7 72% 77°
SEBASTIAN, TX 78594 weather forecast Day 1, 12 hours 1 PM 90° 101° Mostly Cloudy 33%
RAIN
***
0% Thunder
( 35% severe)
ESE   12 62% 75°
SEBASTIAN, TX 78594 weather forecast Day 1, 15 hours 4 PM 90° 101° Partly Cloudy ESE   13 62% 75°
SEBASTIAN, TX 78594 weather forecast Day 1, 18 hours 7 PM 87° 97° Partly Cloudy 3%

0% Thunder
( 3% severe)
ESE   13 68% 75°
SEBASTIAN, TX 78594 weather forecast Day 1, 21 hours 10 PM 81° 88° Clear SE   8 88% 77°
Thursday
28 AUG 2025
SEBASTIAN, TX 78594 weather forecast Day 2, 0 hours 1 AM 79° 83° Clear 2%

0% Thunder
( 5% severe)
SSE   6 91% 76°
Low 75° SEBASTIAN, TX 78594 weather forecast Day 2, 3 hours 4 AM 77° 78° Clear SSE   5 97% 76°
High 96° SEBASTIAN, TX 78594 weather forecast Day 2, 6 hours 7 AM 77° 78° Partly Cloudy 3%

0% Thunder
( 13% severe)
SE   3 94% 75°

Partly Cloudy



SEBASTIAN, TX 78594 weather forecast Day 2, 9 hours 10 AM 86° 98° Clear SE   8 77% 78°
SEBASTIAN, TX 78594 weather forecast Day 2, 12 hours 1 PM 92° 102° Partly Cloudy 7%

0% Thunder
( 25% severe)
SE   12 56% 74°
SEBASTIAN, TX 78594 weather forecast Day 2, 15 hours 4 PM 93° 103° Partly Cloudy SE   14 54% 74°
SEBASTIAN, TX 78594 weather forecast Day 2, 18 hours 7 PM 89° 98° Clear 1%

0% Thunder
( 4% severe)
SE   14 61% 74°
SEBASTIAN, TX 78594 weather forecast Day 2, 21 hours 10 PM 81° 87° Clear SE   10 85% 76°

HARLINGEN, TX extended weather forecast

Friday
29 AUG 2025
Saturday
30 AUG 2025
Sunday
31 AUG 2025
Monday
1 SEP 2025
Tuesday
2 SEP 2025
Low 76° Low 76° Low 77° Low 75° Low 75°
High 99° High 98° High 98° High 96° High 95°
SEBASTIAN, TX 78594 weather forecast Day 3 SEBASTIAN, TX 78594 weather forecast Day 4 SEBASTIAN, TX 78594 weather forecast Day 5 SEBASTIAN, TX 78594 weather forecast Day 6 SEBASTIAN, TX 78594 weather forecast Day 7
Clear
19% Rain
Clear
16% Rain
Partly Cloudy
25% Rain
Partly Cloudy
35% Rain
Partly Cloudy
51% Rain
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