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Alamo, TX 78516 Weather
Current conditions
Observed at Mid Valley Airport · 48 min ago
Forecast
10-day-
Today
A slight chance of showers and thunderstorms between 1pm and 4pm, then a chance of showers and thunderstorms between 4pm and 5pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 88. North northeast wind around 8 mph. Chance of precipitation is 30%.
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Tonight
A slight chance of showers and thunderstorms before 9pm. Partly cloudy, with a low around 72. East northeast wind 2 to 7 mph. Chance of precipitation is 20%.
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Thursday
A chance of rain showers after 10am. Mostly sunny, with a high near 85. Northeast wind 2 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
National Weather Service forecast updated 53 min ago.
Hourly
Hourly forecast- Now78°
- 12 PM83°
- 1 PM85°17%
- 2 PM86°21%
- 3 PM87°22%
- 4 PM86°26%
- 5 PM85°24%
- 6 PM84°19%
- 7 PM80°16%
- 8 PM78°18%
- 9 PM77°12%
- 10 PM75°
- 11 PM74°
- Thu12 AM74°
- 1 AM73°
- 2 AM72°
- 3 AM72°
- 4 AM72°
- 5 AM72°
- 6 AM72°
- 7 AM72°
- 8 AM72°
- 9 AM74°10%
- 10 AM77°17%
10-day forecast
Details- TodayOct 21Mostly Sunny then Slight Chance Showers And Thunderstorms26%72°88°
- ThuOct 22Chance Rain Showers36%66°85°
- FriOct 23Sunny68°87°
- SatOct 24Mostly Sunny then Slight Chance Rain Showers15%69°87°
- SunOct 25Partly Sunny67°86°
- MonOct 26Mostly Sunny then Slight Chance Rain Showers21%68°87°
- TueOct 27Mostly Sunny then Chance Showers And Thunderstorms32%66°85°
- WedOct 28Showers0.05 in69°89°
- ThuOct 29Showers0.06 in71°89°
- FriOct 30Heavy rain0.44 in72°83°
Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.
Radar
Full mapWeather news near Alamo
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Air quality
Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.
Forecast
- WedGood
- ThuGood
- FriGood
Brownsville-McAllen, TX reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlyMcAllen Area, records since 1941. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
Forecasters' discussion
From the National Weather Service office in BRO, issued 4 hrs ago
Key Messages
Updated at 632 AM CDT Wed Oct 21 2026
- Showers and thunderstorms over the Gulf moving inland will bring low to moderate (20-50%) rain chances primarily east of US-281 today, and across Deep South Texas into Thursday.
- Narrow beaches around high tide are possible today.
- Overall seasonable temperatures and pleasant weather expected this weekend.
- Rain chances return early next week as a mid-level trough approaches the area.
Discussion
Issued at 1045 PM CDT Tue Oct 20 2026
Rain chances increase through Wednesday morning as deep moisture interacts with coastal troughing offshore. Isolated showers over the Gulf waters will continue to move west-southwest, bringing isolated showers to the coast. As moisture encroaches westward, isolated to scattered showers and thunderstorms are expected to move inland late Wednesday morning through Wednesday afternoon. Shower coverage should diminish as it travels inland, with moderate PoPs (40-70%) focused east of US-281, highest along the coast. Isolated showers will continue working their way inland Wednesday night into Thursday. Rainfall amounts should generally be less than a half an inch, but isolated higher amounts to 2 inches are possible under heavier showers. Rain chances diminish Friday through the weekend bar afternoon sea breeze showers, before increasing again early next week ahead of an approaching trough.
High pressure over NE Mexico will return fair weather Friday into the weekend, with isolated sea breeze showers possible in the afternoons. Temperatures remain seasonable with highs in the upper 80s and lows in the 60s to low 70s.
Long-period swell and northeast winds will keep local beaches narrow. Minor coastal flooding is possible near high tide. Current guidance keeps water levels below minor flooding thresholds, but conditions will continue to be monitored.
Aviation
(12Z TAFS) Issued at 632 AM CDT Wed Oct 21 2026
Predominately VFR conditions are forecast to continue through the period, however isolated to scattered convection this afternoon could briefly produce MVFR ceilings and visibilities. Northerly winds are forecast to shift easterly to southeasterly through the day, before becoming light and variable again overnight.
Marine
Issued at 1045 PM CDT Tue Oct 20 2026
Lingering moderate seas will result in intermittent SCEC conditions on the Gulf today. There is a medium to high (40-80%) chance of rain Wednesday and Wednesday night as a coastal trough interacts with deep moisture. Thursday and Friday, conditions improve as seas decrease to slight. Gentle to fresh onshore winds will continue through the week. This weekend, conditions may deteriorate yet again ahead of an approaching trough.
Forecasts, observations and alerts in the United States come from the National Weather Service (NOAA); radar from NOAA's Multi-Radar Multi-Sensor system; satellite imagery from NASA's Global Imagery Browse Services (GIBS) and NOAA's GOES satellites; the map from the U.S. Geological Survey's National Map; air quality from AirNow (EPA and its partners); hurricane information from the National Hurricane Center; climate normals and records from NOAA's Regional Climate Centers (ACIS). Forecasts outside the United States and the UV index: MET Norway (CC BY 4.0); observations outside the U.S.: airport reports via NOAA's Aviation Weather Center. Place names: GeoNames (CC BY 4.0). Data are copied on a schedule and may lag the sources; for warnings that affect your safety, follow your local National Weather Service office and emergency officials. Weather news is drawn from the 4Search index and reflects what the press published. Terms of use.