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Union, LA Weather

Today: Sunny, high 81°F, low 57°F. Hourly and 10-day forecast from the National Weather Service. Times are local (CDT).

Union, LA current weather

58°F

Mostly Clear

Forecast for this hour. No recent report from a nearby station.

H 81° / L 57°

  • No rain expected in the next 12 hours

No recent station report. NWS hourly forecast updated 10/27/2026, 11:57 PM PT

Hourly forecast

NWS, updated 10/27/2026, 11:57 PM PT

  1. Now58°
  2. 4 AM58°
  3. 5 AM57°
  4. 6 AM57°
  5. 7 AM57°
  6. 8 AM58°
  7. 9 AM63°
  8. 10 AM70°
  9. 11 AM75°
  10. 12 PM78°
  11. 1 PM79°
  12. 2 PM79°
  13. 3 PM81°
  14. 4 PM80°
  15. 5 PM79°
  16. 6 PM76°
  17. 7 PM70°
  18. 8 PM65°
  19. 9 PM63°
  20. 10 PM61°
  21. 11 PM60°
  22. Thu12 AM58°
  23. 1 AM57°
  24. 2 AM55°
  25. 3 AM55°
  26. 4 AM55°
  27. 5 AM54°
  28. 6 AM53°
  29. 7 AM53°
  30. 8 AM55°
  31. 9 AM60°
  32. 10 AM69°
  33. 11 AM74°
  34. 12 PM77°
  35. 1 PM80°
  36. 2 PM80°
  37. 3 PM81°
  38. 4 PM82°
  39. 5 PM80°
  40. 6 PM77°
  41. 7 PM74°
  42. 8 PM67°
  43. 9 PM64°
  44. 10 PM64°
  45. 11 PM63°
  46. Fri12 AM62°
  47. 1 AM61°
  48. 2 AM61°

10-day forecast

Tap a day for details

  • Today10/28Low 57°High 81°

    Wednesday: Sunny. High near 81, with temperatures falling to around 79 in the afternoon. Northeast wind 0 to 5 mph.

    Overnight: Partly cloudy, with a low around 57. Northeast wind around 0 mph.

    Sunny
  • Thu10/29Low 59°High 82°

    Thursday: Sunny, with a high near 82. Northeast wind 0 to 5 mph.

    Thursday Night: Partly cloudy, with a low around 59. Northeast wind around 0 mph.

    Sunny
  • Fri10/3011% chance of precipitationLow 65°High 83°

    Friday: Partly sunny, with a high near 83. East wind 5 to 10 mph.

    Friday Night: Mostly cloudy, with a low around 65. East wind 0 to 5 mph.

    Partly Sunny
  • Sat10/3171% chance of precipitationLow 66°High 82°

    Saturday: Showers and thunderstorms likely after 7am. Partly sunny, with a high near 82. East wind around 5 mph.

    Saturday Night: Showers and thunderstorms likely before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 66. East wind 0 to 5 mph.

    Showers And Thunderstorms Likely
  • Sun11/130% chance of precipitationLow 65°High 83°

    Sunday: A slight chance of showers and thunderstorms before noon, then a chance of showers and thunderstorms. Partly sunny, with a high near 83. Northeast wind 0 to 5 mph.

    Sunday Night: Mostly cloudy, with a low around 65. East wind around 0 mph.

    Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms
  • Mon11/215% chance of precipitationLow 64°High 83°

    Monday: Partly sunny, with a high near 83. Southeast wind 0 to 10 mph.

    Monday Night: A slight chance of rain showers after midnight. Partly cloudy, with a low around 64. South wind 0 to 5 mph.

    Partly Sunny
  • Tue11/334% chance of precipitationLow High 82°

    Tuesday: A chance of rain showers before noon, then a chance of showers and thunderstorms. Partly sunny, with a high near 82. South wind 5 to 10 mph.

    Chance Rain Showers
  • Wed11/4Model blend28% chance of precipitationLow 54°High 78°

    Wednesday: Partly cloudy, slight chance of rain. High near 78°. Low that night near 54°. About 0.10 in of precipitation.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

  • Thu11/5Model blend11% chance of precipitationLow 52°High 77°

    Thursday: Mostly sunny. High near 77°. Low that night near 52°. About 0.01 in of precipitation.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

  • Fri11/6Model blendLow High 76°

    Friday: Partly cloudy. High near 76°. About 0.01 in of precipitation.

    Computer model guidance from the NOAA National Blend of Models, not a forecast written by NWS forecasters. Expect changes this far out.

Forecast for 30.090, -90.883 from the NWS LIX office, updated 10/27/2026, 11:57 PM PT · Official forecast on weather.gov

Days 8 to 10: NOAA National Blend of Models, station KREG (Gonzales/Louisiana Rgnl, 7 mi), model run 10/27/2026, 6:00 PM CDT

From the National Weather Service; may be delayed. Not for life-safety decisions. In an emergency, call 911.

Next 6 hours

NWS hourly forecast

  1. Now58°Mostly Clear0%0 mph
  2. 4 AM58°Partly Cloudy0%0 mph
  3. 5 AM57°Mostly Clear0%0 mph
  4. 6 AM57°Mostly Sunny0%0 mph
  5. 7 AM57°Sunny0%0 mph
  6. 8 AM58°Sunny0%0 mph

Hourly details

Next 7 days: temperature chart, feels like, rain and snow amounts, sky cover, wind and gustsShow
50°68°85°0%100%WedThuFriSatSunMonTue81°57°82°53°83°60°81°65°82°67°83°65°81°65°

Line: temperature °F. Bars: chance of precipitation.

  1. WedNow58°0%0
  2.  4 AM58°0%0
  3.  5 AM57°0%0
  4.  6 AM57°0%0
  5.  7 AM57°0%0
  6.  8 AM58°0%0
  7.  9 AM63°0%0
  8.  10 AM70°0%5
  9.  11 AM75°0%5
  10.  12 PM78°0%5
  11.  1 PM79°0%5
  12.  2 PM79°0%5
  13.  3 PM81°0%5
  14.  4 PM80°0%5
  15.  5 PM79°0%5
  16.  6 PM76°0%0
  17.  7 PM70°0%0
  18.  8 PM65°0%0
  19.  9 PM63°0%0
  20.  10 PM61°0%0
  21.  11 PM60°0%0
  22. Thu 10/2912 AM58°0%0
  23.  1 AM57°0%0
  24.  2 AM55°0%0
  25.  3 AM55°0%0
  26.  4 AM55°0%0
  27.  5 AM54°0%0
  28.  6 AM53°0%0
  29.  7 AM53°0%0
  30.  8 AM55°0%5
  31.  9 AM60°0%5
  32.  10 AM69°0%5
  33.  11 AM74°0%5
  34.  12 PM77°0%5
  35.  1 PM80°0%5
  36.  2 PM80°0%5
  37.  3 PM81°0%5
  38.  4 PM82°0%5
  39.  5 PM80°0%5
  40.  6 PM77°0%0
  41.  7 PM74°0%0
  42.  8 PM67°0%0
  43.  9 PM64°0%0
  44.  10 PM64°0%0
  45.  11 PM63°0%0
  46. Fri 10/3012 AM62°0%0
  47.  1 AM61°0%0
  48.  2 AM61°0%0
  49.  3 AM61°0%0
  50.  4 AM61°0%0
  51.  5 AM60°0%0
  52.  6 AM60°0%5
  53.  7 AM61°0%5
  54.  8 AM64°0%5
  55.  9 AM69°0%5
  56.  10 AM73°0%5
  57.  11 AM77°0%5
  58.  12 PM79°0%5
  59.  1 PM81°11%10
  60.  2 PM83°11%10
  61.  3 PM83°11%10
  62.  4 PM82°11%10
  63.  5 PM81°11%5
  64.  6 PM79°11%5
  65.  7 PM77°3%5
  66.  8 PM74°3%5
  67.  9 PM72°3%5
  68.  10 PM70°3%5
  69.  11 PM69°3%0
  70. Sat 10/3112 AM68°3%0
  71.  1 AM68°11%0
  72.  2 AM67°11%0
  73.  3 AM67°11%5
  74.  4 AM67°11%5
  75.  5 AM66°11%5
  76.  6 AM65°11%5
  77.  7 AM66°30%5
  78.  8 AM69°30%5
  79.  9 AM72°30%5
  80.  10 AM76°30%5
  81.  11 AM78°30%5
  82.  12 PM80°30%5
  83.  1 PM81°71%5
  84.  2 PM81°71%5
  85.  3 PM81°71%5
  86.  4 PM80°71%5
  87.  5 PM78°71%5
  88.  6 PM76°71%5
  89.  7 PM76°53%5
  90.  8 PM74°53%5
  91.  9 PM72°53%0
  92.  10 PM70°53%0
  93.  11 PM69°53%0
  94. Sun 11/112 AM69°53%0
  95.  1 AM69°39%0
  96.  1 AM69°39%0
  97.  2 AM68°39%0
  98.  3 AM68°39%0
  99.  4 AM67°39%0
  100.  5 AM67°39%0
  101.  6 AM67°23%0
  102.  7 AM69°23%0
  103.  8 AM71°23%0
  104.  9 AM74°23%0
  105.  10 AM77°23%0
  106.  11 AM79°23%5
  107.  12 PM81°30%5
  108.  1 PM82°30%5
  109.  2 PM82°30%5
  110.  3 PM82°30%5
  111.  4 PM81°30%5
  112.  5 PM79°30%0
  113.  6 PM77°10%0
  114.  7 PM74°10%0
  115.  8 PM71°10%0
  116.  9 PM69°10%0
  117.  10 PM68°10%0
  118.  11 PM67°10%0
  119. Mon 11/212 AM67°3%0
  120.  1 AM67°3%0
  121.  2 AM66°3%0
  122.  3 AM66°3%0
  123.  4 AM65°3%0
  124.  5 AM65°3%0
  125.  6 AM66°5%0
  126.  7 AM68°5%0
  127.  8 AM72°5%0
  128.  9 AM75°5%5
  129.  10 AM77°5%5
  130.  11 AM79°5%5
  131.  12 PM81°12%5
  132.  1 PM82°12%5
  133.  2 PM83°12%10
  134.  3 PM83°12%10
  135.  4 PM82°12%5
  136.  5 PM80°12%5
  137.  6 PM77°5%5
  138.  7 PM74°5%0
  139.  8 PM71°5%0
  140.  9 PM68°5%0
  141.  10 PM67°5%0
  142.  11 PM67°5%0
  143. Tue 11/312 AM67°15%0
  144.  1 AM67°15%0
  145.  2 AM66°15%5
  146.  3 AM66°15%5
  147.  4 AM65°15%5
  148.  5 AM65°15%5
  149.  6 AM65°29%5
  150.  7 AM67°29%5
  151.  8 AM71°29%5
  152.  9 AM74°29%5
  153.  10 AM76°29%10
  154.  11 AM78°29%10
  155.  12 PM80°34%10
  156.  1 PM81°34%10

Temperature °F · chance of precipitation · wind in mph

NWS hourly forecast updated 10/27/2026, 11:57 PM PT

Radar and satellite

National radar

NEXRAD (last 50 min) and GOES

Latest

Nearby hazards

Louisiana hazards

Severe storm and flash flood outlooks, expected rain, river flooding and wildfires near this area

  • Severe storm outlook today:No thunderstorm risk area over this locationOutlook map
  • Excessive rainfall outlook (flash flood risk):Could not check the Weather Prediction Center outlook right now.
  • River gauges within 40 miles at or above flood stage: None reported
  • Active wildfires within 50 miles: None reported

Drought

By county

St. James Parish, week of 10/20/2026

100% of the county is in moderate drought or worse.

Sun and moon

Local time, center of the area

Sunrise
7:14 AM
Sunset
6:19 PM
Daylight
11 hr 5 min
Moon
Waning Gibbous 95% lit
First light (civil dawn)
6:50 AM
Last light (civil dusk)
6:44 PM
Moonrise
8:06 PM
Moonset
10 AM

Normal October weather

Climate

Normal October high 80°, low 59°, precipitation 4.65 in for the month. 1991 to 2020 normals at Donaldsonville 4 SW, 9 mi away.

Other places nearby

Data sources

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Frequently asked questions

What is the high temperature today in Union, LA?
The National Weather Service forecast for wednesday calls for a high near 81°F. Sunny.
Will it rain in Union, LA in the next 24 hours?
The NWS hourly forecast does not show any hour with a 50% or higher chance of precipitation in the next 24 hours.
What is the 10-day forecast for Union, LA?
The first 7 days come from the National Weather Service forecast. Days 8 to 10 (Nov 4 to Nov 6) come from the NOAA National Blend of Models, with highs of 76°F to 78°F. Model guidance this far out often changes.
What time is sunrise and sunset in Union, LA today?
Sunrise is about 7:14 AM CDT and sunset is about 6:19 PM CDT (calculated for the center of the area, within a few minutes).
What is the normal October weather in Union, LA?
At Donaldsonville 4 SW, the 1991 to 2020 normal high in October is 80°F and the normal low is 59°F.

About this data

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