Water Temperature of the Rio Grande in Mercedes, TX

Current Water Temperature

83.7°F

Measurement Time: Sunday, May 11, 2025, 5:15 PM 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

73.9°F
Partly Cloudy
Conditions: Partly Cloudy
Humidity: 94%
Feels Like: 78.2°F
Wind: SSE 15.7 mph
Wind Gusts: 26.1 mph
Pressure: 29.8 in
Precipitation: 0 in
Cloud Cover: 0%
Visibility: 9 mi
UV Index: 0

Five Day Weather Forecast

Sunny
Tue
H: 101°F
L: 69°F
Partly Cloudy
Wed
H: 98°F
L: 71°F
Partly Cloudy
Thu
H: 100°F
L: 73°F
Partly Cloudy
Fri
H: 98°F
L: 76°F
Partly Cloudy
Sat
H: 96°F
L: 76°F

Air Quality

PM2.5: 12.03 μg/m3
PM10: 13.32 μg/m3
Carbon Monoxide: 325.6 μg/m3
Nitrogen Dioxide: 6.66 μg/m3
Sulphur Dioxide: 2.59 μg/m3
Ozone: 92 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 1:27 PM
Sunset: 8:10 PM
Daylight: 13 hrs 24 mins
Moonrise: 9:26 PM
Moon Transit: 1:49 AM
Moonset: 7:06 AM
Moon Phase: Full
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

1:19 AM - 3:49 AM
12:38 AM - 3:08 PM

Minor Periods

8:56 PM - 10:26 PM
6:36 AM - 8:06 AM

Action Rating: 4 out of 5

Tuesday, May 13, 2025

Weather Forecast

Conditions: Sunny
Average Temperature: 82.3°F
Average Humidity: 67%
Chance of Rain: 0%
Wind: 19.7 mph
UV Index: 2.8

Air Quality

AQI: 1 - Good
PM2.5: 12.6 μg/m3
PM10: 14.19 μg/m3
Carbon Monoxide: 319.53 μg/m3
Nitrogen Dioxide: 7.41 μg/m3
Sulphur Dioxide: 3.15 μg/m3
Ozone: 102.32 μg/m3

Astronomical

Sunrise: 6:47 AM
Sun Transit: 1:27 PM
Sunset: 8:10 PM
Daylight: 13 hrs 24 mins
Moonrise: 9:26 PM
Moon Transit: 1:49 AM
Moonset: 7:06 AM
Moon Phase: Full
Moon Illumination: 97.2%

Best Times for Fishing or Hunting

Major Periods

1:19 AM - 3:49 AM
12:38 AM - 3:08 PM

Minor Periods

8:56 PM - 10:26 PM
6:36 AM - 8:06 AM

Action Rating: 4 out of 5

Wednesday, May 14, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 80.7°F
Average Humidity: 78%
Chance of Rain: 0%
Wind: 20.6 mph
UV Index: 2.8

Air Quality

AQI: 1 - Good
PM2.5: 14.48 μg/m3
PM10: 16.92 μg/m3
Carbon Monoxide: 344.84 μg/m3
Nitrogen Dioxide: 4.86 μg/m3
Sulphur Dioxide: 2.8 μg/m3
Ozone: 98.44 μg/m3

Astronomical

Sunrise: 6:46 AM
Sun Transit: 1:27 PM
Sunset: 8:11 PM
Daylight: 13 hrs 25 mins
Moonrise: 10:23 PM
Moon Transit: 2:39 AM
Moonset: 7:51 AM
Moon Phase: Full
Moon Illumination: 92.3%

Best Times for Fishing or Hunting

Major Periods

2:09 AM - 4:39 AM
1:30 PM - 4:00 PM

Minor Periods

9:53 PM - 11:23 PM
7:21 AM - 8:51 AM

Action Rating: 3 out of 5

Thursday, May 15, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 83.8°F
Average Humidity: 75%
Chance of Rain: 0%
Wind: 24.6 mph
UV Index: 2.9

Air Quality

AQI: 2 - Moderate
PM2.5: 22.71 μg/m3
PM10: 24.73 μg/m3
Carbon Monoxide: 434.68 μg/m3
Nitrogen Dioxide: 4.63 μg/m3
Sulphur Dioxide: 2.83 μg/m3
Ozone: 105.72 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 1:28 PM
Sunset: 8:11 PM
Daylight: 13 hrs 26 mins
Moonrise: 11:16 PM
Moon Transit: 3:31 AM
Moonset: 8:41 AM
Moon Phase: Waning Gibbous
Moon Illumination: 85.2%

Best Times for Fishing or Hunting

Major Periods

3:01 AM - 5:31 AM
2:23 PM - 4:53 PM

Minor Periods

12:00 AM - 12:00 AM
8:11 AM - 9:41 AM

Action Rating: 2 out of 5

Friday, May 16, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 84.8°F
Average Humidity: 71%
Chance of Rain: 0%
Wind: 19.7 mph
UV Index: 3

Air Quality

AQI: 2 - Moderate
PM2.5: 23.4 μg/m3
PM10: 25.4 μg/m3
Carbon Monoxide: 431.62 μg/m3
Nitrogen Dioxide: 5.42 μg/m3
Sulphur Dioxide: 2.87 μg/m3
Ozone: 83.69 μg/m3

Astronomical

Sunrise: 6:45 AM
Sun Transit: 1:28 PM
Sunset: 8:12 PM
Daylight: 13 hrs 27 mins
Moonrise: 12:16 AM
Moon Transit: 4:25 AM
Moonset: 9:35 AM
Moon Phase: Waning Gibbous
Moon Illumination: 76.3%

Best Times for Fishing or Hunting

Major Periods

3:55 AM - 6:25 AM
3:16 PM - 5:46 PM

Minor Periods

9:05 AM - 10:35 AM
12:00 AM - 12:00 AM

Action Rating: 3 out of 5

Saturday, May 17, 2025

Weather Forecast

Conditions: Partly Cloudy
Average Temperature: 82.7°F
Average Humidity: 77%
Chance of Rain: 0%
Wind: 20.4 mph
UV Index: 0

Air Quality

AQI: 0 -
PM2.5: 0 μg/m3
PM10: 0 μg/m3
Carbon Monoxide: 0 μg/m3
Nitrogen Dioxide: 0 μg/m3
Sulphur Dioxide: 0 μg/m3
Ozone: 0 μg/m3

Astronomical

Sunrise: 6:44 AM
Sun Transit: 1:28 PM
Sunset: 8:12 PM
Daylight: 13 hrs 28 mins
Moonrise: 12:06 AM
Moon Transit: 5:19 AM
Moonset: 10:35 AM
Moon Phase: Waning Gibbous
Moon Illumination: 66.1%

Best Times for Fishing or Hunting

Major Periods

4:49 AM - 7:19 AM
4:09 PM - 6:39 PM

Minor Periods

10:05 AM - 11:35 AM
12:00 AM - 12:00 AM

Action Rating: 2 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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