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Marion, IL Weather

It is 66°F and clear in Marion, IL, observed at 9:45 AM CDT. Today: Partly Sunny, high 81°F, low 57°F. Hourly and 10-day forecast from the National Weather Service. Times are local (CDT).

Marion, IL current weather

66°F

Clear

H 81° / L 57°Feels like 66°

About the same as yesterday at this time

  • No rain expected in the next 12 hours

Observed at Marion - Williamson County Regional Airport (5 mi away), 10/30/2026, 9:45 AM CDT

Hourly forecast

NWS, updated 10/30/2026, 7:46 AM PT

  1. Now66°
  2. 11 AM70°
  3. 12 PM75°
  4. 1 PM79°
  5. 2 PM80°
  6. 3 PM81°
  7. 4 PM79°
  8. 5 PM79°
  9. 6 PM76°
  10. 7 PM69°
  11. 8 PM66°
  12. 9 PM64°
  13. 10 PM63°
  14. 11 PM62°
  15. 12 AM61°Sat
  16. 1 AM61°
  17. 2 AM60°
  18. 3 AM59°
  19. 4 AM60°
  20. 5 AM59°
  21. 6 AM58°
  22. 7 AM57°
  23. 8 AM57°
  24. 9 AM60°
  25. 10 AM65°
  26. 11 AM69°
  27. 12 PM72°
  28. 1 PM73°
  29. 2 PM74°
  30. 3 PM76°
  31. 4 PM74°
  32. 5 PM74°
  33. 6 PM73°
  34. 7 PM68°23%
  35. 8 PM65°23%
  36. 9 PM64°23%
  37. 10 PM63°23%
  38. 11 PM62°23%
  39. 12 AM62°23%Sun
  40. 1 AM61°45%
  41. 1 AM60°45%
  42. 2 AM59°45%
  43. 3 AM58°45%
  44. 4 AM57°45%
  45. 5 AM57°45%
  46. 6 AM57°67%
  47. 7 AM58°67%
  48. 8 AM61°67%

10-day forecast

Tap a day for details

  • Today10/30Low 57°High 81°

    Today: Partly sunny. High near 81, with temperatures falling to around 79 in the afternoon. East southeast wind around 5 mph.

    Tonight: Mostly cloudy. Low around 57, with temperatures rising to around 59 overnight. East wind around 3 mph.

    Partly Sunny
  • Sat10/3145% chance of precipitationLow 56°High 76°

    Saturday: Cloudy. High near 76, with temperatures falling to around 74 in the afternoon. East southeast wind 3 to 7 mph.

    Saturday Night: A chance of rain showers after 7pm. Cloudy, with a low around 56. East southeast wind around 6 mph. Chance of precipitation is 50%.

    Cloudy
  • Sun11/167% chance of precipitationLow 55°High 67°

    Sunday: Rain showers likely. Mostly cloudy, with a high near 67. Southeast wind 5 to 8 mph. Chance of precipitation is 70%.

    Sunday Night: A slight chance of rain showers after midnight. Mostly cloudy, with a low around 55. South southeast wind around 6 mph. Chance of precipitation is 20%.

    Rain Showers Likely
  • Mon11/230% chance of precipitationLow 60°High 71°

    Monday: A slight chance of rain showers. Mostly cloudy, with a high near 71. South southeast wind 6 to 12 mph, with gusts as high as 18 mph.

    Monday Night: A chance of rain showers after midnight. Mostly cloudy, with a low around 60. South southeast wind 10 to 20 mph.

    Slight Chance Rain Showers
  • Tue11/346% chance of precipitationLow 55°High 74°

    Tuesday: A chance of rain showers. Partly sunny, with a high near 74. South southeast wind 13 to 20 mph, with gusts as high as 25 mph.

    Tuesday Night: A chance of rain showers. Mostly cloudy, with a low around 55. South southeast wind 5 to 12 mph.

    Chance Rain Showers
  • Wed11/444% chance of precipitationLow 48°High 70°

    Wednesday: A chance of rain showers. Mostly cloudy, with a high near 70. South southwest wind 6 to 10 mph.

    Wednesday Night: A slight chance of rain showers. Mostly cloudy, with a low around 48. North northwest wind 1 to 5 mph.

    Chance Rain Showers
  • Thu11/511% chance of precipitationLow 44°High 70°

    Thursday: Partly sunny, with a high near 70. Northwest wind 3 to 8 mph.

    Thursday Night: Partly cloudy, with a low around 44. North northwest wind around 2 mph.

    Partly Sunny
  • Fri11/6Model blendLow 41°High 65°

    Friday: Partly cloudy. High near 65°. Low that night near 41°.

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

  • Sat11/7Model blendLow 39°High 64°

    Saturday: Partly cloudy. High near 64°. Low that night near 39°.

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

  • Sun11/8Model blend16% chance of precipitationLow 40°High 65°

    Sunday: Mostly cloudy. High near 65°. Low that night near 40°. About 0.22 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 37.727, -88.935 from the NWS PAH office, updated 10/30/2026, 7:46 AM PT · Official forecast on weather.gov

Days 8 to 10: NOAA National Blend of Models, station KMDH (Murphysboro/S Illinois Arpt, 17 mi), model run 10/30/2026, 9:00 AM 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. Now66°Mostly Sunny0%5 mph
  2. 11 AM70°Partly Sunny0%3 mph
  3. 12 PM75°Partly Sunny0%3 mph
  4. 1 PM79°Partly Sunny0%5 mph
  5. 2 PM80°Partly Sunny0%5 mph
  6. 3 PM81°Mostly Sunny0%5 mph

Hourly details

Next 7 days: temperature chart, feels like, rain and snow amounts, sky cover, wind and gustsShow

Observed today

Since midnight, vs yesterday and normal

Today's high so far is 3° above the normal of 63° and 14° cooler than yesterday's high.

High so far
66°
3° above normal
Low so far
52°
Normal low 40°
Precipitation
0.00 in
Since midnight
Yesterday
High 81° · Low 52° · Precip 0.00 in
Normal for today
High 63° · Low 40°

Observed at Marion - Williamson County Regional Airport (KMWA) since midnight local time, through 9:45 AM. Station reports are preliminary and not quality controlled. Normals are estimated from 1991 to 2020 monthly normals at Carbondale Sewage Plt.

Radar and satellite

National radar

NEXRAD (up to 24 hours) and GOES

Latest

Frequently asked questions

What is the weather in Marion, IL right now?
The latest observation from Marion - Williamson County Regional Airport was 66°F and clear, reported at 10/30/2026, 9:45 AM CDT.
What is the high temperature today in Marion, IL?
The National Weather Service forecast for today calls for a high near 81°F. Partly Sunny.
Will it rain in Marion, IL 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 Marion, IL?
The first 7 days come from the National Weather Service forecast. Days 8 to 10 (Nov 6 to Nov 8) come from the NOAA National Blend of Models, with highs of 64°F to 65°F. Model guidance this far out often changes.
What time is sunrise and sunset in Marion, IL today?
Sunrise is about 7:19 AM CDT and sunset is about 5:59 PM CDT (calculated for the center of the area, within a few minutes).
What is the normal October weather in Marion, IL?
At Carbondale Sewage Plt, the 1991 to 2020 normal high in October is 70°F and the normal low is 44°F.

Rain and snow totals

Next 3 days, NWS forecast grid

Rain (liquid)
0.39 in
Snow
0.00 in
Ice
0.00 in

Nearby hazards

Illinois 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: Blake Fire (0 acres)

UV and air quality forecast

EPA and AirNow

AQI forecast today (Evansville)
ModeratePM2.5
AQI forecast tomorrow (Evansville)
ModeratePM2.5

UV index guide · Air quality

Drought

By county

Williamson County, week of 10/27/2026

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

Sun and moon

Local time, center of the area

Sunrise
7:19 AM
Sunset
5:59 PM
Daylight
10 hr 40 min
Moon
Waning Gibbous 79% lit
First light (civil dawn)
6:52 AM
Last light (civil dusk)
6:26 PM
Moonrise
9:45 PM
Moonset
12:27 PM

Normal October weather

Climate

Normal October high 70°, low 44°, precipitation 3.70 in for the month. 1991 to 2020 normals at Carbondale Sewage Plt, 13 mi away.

Other places nearby

Data sources

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About this data

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