Water Temperature of the Rio Grande in Mercedes, TX

Current Water Temperature

90.1°F

Measurement Time: Thursday, June 26, 2025, 9:00 AM CDT

Temperature Locations

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Local Points of Interest

Mercedes Settling Basin; Matamoros Municipality, Mexico

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Rio Grande

Station Name: Rio Grande nr Mercedes, TX
Data Source: Water Data - usgc.gov

Elevation Above Sea Level: 75 feet / 23 meters

Nearest Address:
Mercedes, TX 78570
Hidalgo County

GPS Coordinates: 26.0615722, -97.8999833

Nearby Water Temperatures

Rio Grande, Los Indios, TX (8.5 mi)
Rio Grande, Mission, TX (27.5 mi)
Rio Grande, Mission, TX (29.8 mi)
Rio Grande, Mission, TX (32.5 mi)
Laguna Madre, Bayview, TX (40.6 mi)
Port Isabel Channel, Port Isabel, TX (42.5 mi)
Laguna Madre, South Padre Island, TX (45.5 mi)
Brownsville Ship Channel, South Padre Island, TX (46.3 mi)
Laguna Madre, Armstrong, TX (57.6 mi)
Rio Grande, Rio Grande City, TX (59.2 mi)
Rio Grande, Roma, TX (73.1 mi)
Baffin Bay, Kingsville, TX (90.7 mi)
Gulf Intracoastal Waterway, Corpus Christi, TX (104.6 mi)
Packery Channel, Corpus Christi, TX (116.1 mi)
Corpus Christi Bay, Corpus Christi, TX (124.9 mi)

Weather for Mercedes, Texas

Current Weather

93.9°F
Overcast
Conditions: Overcast
Humidity: 51%
Feels Like: 105.5°F
Wind: SE 15.9 mph
Wind Gusts: 18.3 mph
Pressure: 29.98 in
Precipitation: 0 in
Cloud Cover: 25%
Visibility: 9 mi
UV Index: 11.6

Five Day Weather Forecast

Partly Cloudy
Thu
H: 93°F
L: 75°F
Partly Cloudy
Fri
H: 93°F
L: 75°F
Thundery outbreaks in nearby
Sat
H: 93°F
L: 78°F
Partly Cloudy
Sun
H: 97°F
L: 77°F
Partly Cloudy
Mon
H: 98°F
L: 76°F

Air Quality

AQI: 2 - Moderate
PM2.5: 6.11 μg/m3
PM10: 8.7 μg/m3
Carbon Monoxide: 199.8 μg/m3
Nitrogen Dioxide: 4.07 μg/m3
Sulphur Dioxide: 0.93 μg/m3
Ozone: 57 μg/m3

Astronomical

Sunrise: 6:42 AM
Sun Transit: 1:34 PM
Sunset: 8:28 PM
Daylight: 13 hrs 46 mins
Moonrise: 7:45 AM
Moon Transit: 2:57 PM
Moonset: 10:05 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:51 AM - 3:21 AM
2:27 PM - 4:57 PM

Minor Periods

9:35 PM - 11:05 PM
7:15 AM - 8:45 AM

Action Rating: 3 out of 5

Thursday, June 26, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 83.5°F
Average Humidity: 76%
Chance of Rain: 0%
Wind: 18.3 mph
UV Index: 2.9

Air Quality

AQI: 1 - Good
PM2.5: 11.07 μg/m3
PM10: 14.69 μg/m3
Carbon Monoxide: 219.26 μg/m3
Nitrogen Dioxide: 8.04 μg/m3
Sulphur Dioxide: 1.69 μg/m3
Ozone: 54.36 μg/m3

Astronomical

Sunrise: 6:42 AM
Sun Transit: 1:34 PM
Sunset: 8:28 PM
Daylight: 13 hrs 46 mins
Moonrise: 7:45 AM
Moon Transit: 2:57 PM
Moonset: 10:05 PM
Moon Phase: New
Moon Illumination: 0.1%

Best Times for Fishing or Hunting

Major Periods

12:51 AM - 3:21 AM
2:27 PM - 4:57 PM

Minor Periods

9:35 PM - 11:05 PM
7:15 AM - 8:45 AM

Action Rating: 3 out of 5

Friday, June 27, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 82.9°F
Average Humidity: 75%
Chance of Rain: 0%
Wind: 18.3 mph
UV Index: 3

Air Quality

AQI: 1 - Good
PM2.5: 8.27 μg/m3
PM10: 10.94 μg/m3
Carbon Monoxide: 214.16 μg/m3
Nitrogen Dioxide: 7.53 μg/m3
Sulphur Dioxide: 1.64 μg/m3
Ozone: 51.32 μg/m3

Astronomical

Sunrise: 6:42 AM
Sun Transit: 1:34 PM
Sunset: 8:28 PM
Daylight: 13 hrs 46 mins
Moonrise: 8:52 AM
Moon Transit: 3:54 PM
Moonset: 10:50 PM
Moon Phase: New
Moon Illumination: 2.0%

Best Times for Fishing or Hunting

Major Periods

1:51 AM - 4:21 AM
3:24 PM - 5:54 PM

Minor Periods

10:20 PM - 11:50 PM
8:22 AM - 9:52 AM

Action Rating: 3 out of 5

Saturday, June 28, 2025

Weather Forecast

Conditions: Thundery outbreaks in nearby
Average Temperature: 84.5°F
Average Humidity: 74%
Chance of Rain: 0%
Wind: 16.6 mph
UV Index: 2.5

Air Quality

AQI: 1 - Good
PM2.5: 8.45 μg/m3
PM10: 12.16 μg/m3
Carbon Monoxide: 231.77 μg/m3
Nitrogen Dioxide: 7.8 μg/m3
Sulphur Dioxide: 1.6 μg/m3
Ozone: 50.88 μg/m3

Astronomical

Sunrise: 6:43 AM
Sun Transit: 1:35 PM
Sunset: 8:28 PM
Daylight: 13 hrs 45 mins
Moonrise: 9:56 AM
Moon Transit: 4:44 PM
Moonset: 11:27 PM
Moon Phase: Waxing Crescent
Moon Illumination: 6.5%

Best Times for Fishing or Hunting

Major Periods

2:44 AM - 5:14 AM
4:14 PM - 6:44 PM

Minor Periods

12:00 AM - 12:00 AM
9:26 AM - 10:56 AM

Action Rating: 2 out of 5

Sunday, June 29, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 85.7°F
Average Humidity: 67%
Chance of Rain: 0%
Wind: 20.8 mph
UV Index: 2.9

Air Quality

AQI: 1 - Good
PM2.5: 6.98 μg/m3
PM10: 10.94 μg/m3
Carbon Monoxide: 241.83 μg/m3
Nitrogen Dioxide: 6.79 μg/m3
Sulphur Dioxide: 1.52 μg/m3
Ozone: 50.44 μg/m3

Astronomical

Sunrise: 6:43 AM
Sun Transit: 1:35 PM
Sunset: 8:28 PM
Daylight: 13 hrs 45 mins
Moonrise: 10:55 AM
Moon Transit: 5:30 PM
Moonset: 12:27 AM
Moon Phase: Waxing Crescent
Moon Illumination: 13.1%

Best Times for Fishing or Hunting

Major Periods

3:33 AM - 6:03 AM
5:00 PM - 7:30 PM

Minor Periods

10:25 AM - 11:55 AM
12:00 AM - 12:00 AM

Action Rating: 2 out of 5

Monday, June 30, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 86.1°F
Average Humidity: 63%
Chance of Rain: 0%
Wind: 18.1 mph
UV Index: 0

Air Quality

AQI: 2 - Moderate
PM2.5: 19.68 μg/m3
PM10: 28.18 μg/m3
Carbon Monoxide: 291.59 μg/m3
Nitrogen Dioxide: 11.93 μg/m3
Sulphur Dioxide: 2.12 μg/m3
Ozone: 38 μg/m3

Astronomical

Sunrise: 6:43 AM
Sun Transit: 1:35 PM
Sunset: 8:28 PM
Daylight: 13 hrs 45 mins
Moonrise: 11:51 AM
Moon Transit: 6:13 PM
Moonset: 1:00 AM
Moon Phase: Waxing Crescent
Moon Illumination: 21.6%

Best Times for Fishing or Hunting

Major Periods

4:17 AM - 6:47 AM
5:43 PM - 8:13 PM

Minor Periods

11:21 AM - 12:51 AM
12:00 AM - 12:00 AM

Action Rating: 4 out of 5

The times presented here are based upon the solunar theory, which is the idea that the movements of fish and other animals are affected by the location of the sun and moon. The major periods are believed to be the times of the greatest animal activity and occur when the moon is directly overhead or underfoot (lunar transits). The minor periods also see increased activity and occur when the moon is rising or setting. The strongest activity occurs during full or new moons, and the weakest during quarter or three quarter moons. This is indicated by the Action Rating.

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