Mercedes, TX Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Mercedes, TX.

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Current Conditions — Mercedes, TX

EDINBURG INTL (KEBG)

Fog/Mist

77.0 F
Humidity:94%
Wind Speed: 12.8 mph
Barometer:29.75 in
Dewpoint:75.2 F
Visibility:4.00 mi
Precip:--
Heat Index:78.8 F
Wind Chill:NA
Apr 27 2026, 02:15 AM CDT
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5-Day Forecast — Mercedes, TX

Monday

High 95 °F
Mostly Cloudy
Monday
Night
Low 77 °F
Mostly Cloudy
Tuesday

High 96 °F
Partly Sunny
Tuesday
Night
Low 75 °F
Partly Cloudy
Wednesday

High 98 °F
Partly Sunny
Wednesday
Night
Low 75 °F
Mostly Cloudy
Thursday

High 93 °F
Mostly Cloudy
Thursday
Night
Low 75 °F
Mostly Cloudy
Friday

High 95 °F
Partly Sunny

Detailed Forecast — Mercedes, TX

Monday
Mostly Cloudy. High near 95°F. Wind 10 to 17 mph, with gusts as high as 29 mph.
Monday Night
Mostly Cloudy. Low around 77°F. Wind 12 to 14 mph, with gusts as high as 24 mph.
Tuesday
Partly Sunny. High near 96°F. Wind 14 to 20 mph, with gusts as high as 32 mph.
Tuesday Night
Partly Cloudy. Low around 75°F. Wind 13 to 16 mph, with gusts as high as 28 mph.
Wednesday
Partly Sunny. High near 98°F. Wind 14 to 17 mph, with gusts as high as 28 mph.
Wednesday Night
Mostly Cloudy. Low around 75°F. Wind around 8 mph, with gusts as high as 16 mph.
Thursday
Mostly Cloudy. High near 93°F. Wind around 17 mph, with gusts as high as 29 mph.
Thursday Night
Mostly Cloudy. Low around 75°F. Wind around 12 mph, with gusts as high as 23 mph.
Friday
Partly Sunny. High near 95°F. Wind 15 to 17 mph, with gusts as high as 28 mph.
Friday Night
Chance of Thunderstorms. Low around 69°F. Wind around 10 mph, with gusts as high as 20 mph.
Saturday
Chance of Thunderstorms. High near 84°F. Wind 13 to 17 mph, with gusts as high as 28 mph.
Saturday Night
Mostly Cloudy. Low around 64°F. Wind around 8 mph, with gusts as high as 15 mph.
Sunday
Partly Sunny. High near 82°F. Wind 12 to 13 mph, with gusts as high as 20 mph.
TX Radar
Current Radar • TX
Day 1 Outlook • April 27, 2026

Observation History — Mercedes, TX

Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
02:15 AM CDT 12.8 4.00 Fog/Mist -- 77.0 75.2 94% NA 78.8 29.75 1007.5
01:55 AM CDT 8.1 4.00 Fog/Mist -- 77.0 75.2 94% NA 78.8 29.75 1007.5
01:35 AM CDT 8.1 4.00 Fog/Mist -- 75.2 73.4 94% NA 76.8 29.75 1007.5
01:15 AM CDT 6.9 4.00 Fog/Mist -- 75.2 73.4 94% NA 76.8 29.76 1007.8
12:55 AM CDT SE 6.9 4.00 Fog/Mist -- 77.0 75.2 94% NA 78.8 29.76 1007.8
12:35 AM CDT 8.1 4.00 Fog/Mist -- 77.0 75.2 94% NA 78.8 29.77 1008.1
12:15 AM CDT SE 6.9 5.00 Fog/Mist -- 77.0 75.2 94% NA 78.8 29.77 1008.1
11:55 PM CDT 6.9 5.00 Fog/Mist -- 77.0 75.2 94% NA 78.8 29.77 1008.1
11:35 PM CDT 6.9 5.00 Fog/Mist -- 77.0 75.2 94% NA 78.8 29.77 1008.1
11:15 PM CDT SE 9.2 5.00 Fog/Mist -- 77.0 75.2 94% NA 78.8 29.77 1008.1
10:55 PM CDT SE 9.2 5.00 Fog/Mist -- 77.0 75.2 94% NA 78.8 29.77 1008.1
10:35 PM CDT 8.1 5.00 Fog/Mist -- 78.8 75.2 89% NA 82.4 29.76 1007.8
10:15 PM CDT 10.3 6.00 Fog/Mist -- 78.8 75.2 89% NA 82.4 29.76 1007.8
09:55 PM CDT 6.9 6.00 Fog/Mist -- 78.8 75.2 89% NA 82.4 29.75 1007.5
09:35 PM CDT 9.2 6.00 Haze -- 78.8 75.2 89% NA 82.4 29.75 1007.5
09:15 PM CDT SE 12.8 7.00 Haze -- 80.6 75.2 84% NA 86.2 29.74 1007.1
08:55 PM CDT 11.4 7.00 Clear -- 80.6 75.2 84% NA 86.2 29.73 1006.8
08:35 PM CDT 12.8 7.00 NULL -- 80.6 75.2 84% NA 86.2 29.72 1006.4
08:15 PM CDT 12.8 7.00 Haze -- 82.4 75.2 79% NA 89.4 29.71 1006.1
07:55 PM CDT 12.8 G 18.3 7.00 Mostly Clear -- 82.4 75.2 79% NA 89.4 29.69 1005.4
07:35 PM CDT 13.9 8.00 Partly Cloudy -- 84.2 75.2 74% NA 92.5 29.69 1005.4
07:15 PM CDT 12.8 8.00 Mostly Cloudy -- 86.0 75.2 70% NA 95.2 29.68 1005.1
06:55 PM CDT 17.2 8.00 Cloudy -- 86.0 73.4 66% NA 93.4 29.68 1005.1
06:35 PM CDT 15.0 9.00 Mostly Cloudy -- 86.0 75.2 70% NA 95.2 29.68 1005.1

Regional Weather Observation

EDINBURG INTL (KEBG)

Fog/Mist
77.0 F

MCALLEN (KMFE)

Cloudy
78.8 F

WESLACO MIDVALLY (KTXW)

Mostly Cloudy
77.9 F

HARLINGEN (KHRL)

Cloudy
78.8 F

PORT ISABEL (KPIL)

Cloudy
78.8 F

BROWNSVILLE (KBRO)

Mostly Cloudy
78.8 F
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