Anna, IL Weather

Union County11:30 PM CDT37.46°N, 89.25°WElevation 630 ft

Current conditions

Clear
48°
Clear
Feels like 48°
High 74° Wednesday·Low 46° tonight
WindCalm
Humidity93%
Dew point46°
Pressure30.29 inHg
Visibility10 mi
Cloud cover10%
UV index0 Low
Sunrise7:10 AM
Sunset6:15 PM

Observed at Southern Illinois Airport · 40 min ago

Forecast

10-day

  • Tonight

    Mostly clear, with a low around 46. Northeast wind around 2 mph.

  • Wednesday

    Sunny. High near 74, with temperatures falling to around 72 in the afternoon. North northeast wind 0 to 3 mph.

  • Wednesday Night

    Clear, with a low around 47. North wind around 2 mph.

National Weather Service forecast updated 12 hrs ago.

Hourly

Hourly forecast
  1. Now Mostly Clear 50°
  2. Wed12 AM Mostly Clear 50°
  3. 1 AM Mostly Clear 49°
  4. 2 AM Mostly Clear 48°
  5. 3 AM Mostly Clear 47°
  6. 4 AM Mostly Clear 47°
  7. 5 AM Mostly Clear 47°
  8. 6 AM Mostly Sunny 46°
  9. 7 AM Mostly Sunny 46°
  10. 8 AM Sunny 48°
  11. 9 AM Sunny 53°
  12. 10 AM Sunny 61°
  13. 11 AM Sunny 65°
  14. 12 PM Sunny 70°
  15. 1 PM Sunny 72°
  16. 2 PM Sunny 73°
  17. 3 PM Sunny 74°
  18. 4 PM Sunny 73°
  19. 5 PM Sunny 72°
  20. 6 PM Clear 69°
  21. 7 PM Clear 61°
  22. 8 PM Clear 58°
  23. 9 PM Clear 56°
  24. 10 PM Clear 54°

10-day forecast

Details
  1. TodayOct 20 Sunny Sunny46°72°
  2. WedOct 21 Sunny Sunny47°74°
  3. ThuOct 22 Sunny Sunny47°76°
  4. FriOct 23 Sunny Sunny46°74°
  5. SatOct 24 Sunny Sunny48°75°
  6. SunOct 25 Mostly Sunny Mostly Sunny50°74°
  7. MonOct 26 Mostly Sunny Mostly Sunny49°74°
  8. TueOct 27 Sunny Sunny52°73°
  9. WedOct 28 Cloudy Cloudy53°67°
  10. ThuOct 29 Mostly sunny Mostly sunny50°67°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
Open the National Weather Service radar (the map here needs JavaScript).

Weather news near Anna

More weather news
  • Bay Area weather: Rain showers expected midweek as fall-like temperatures return

    Rain clouds loom over San Francisco as seen from the Emeryville waterfront last December. Rain and cooler temperatures are forecast this week after the recent heat and sunshine. Cooler temperatures and rain showers are…

    San Francisco Chronicle·2 days ago
  • NOAA releases official US Winter Outlook: What it means for you

    NOAA released its official 2026 Atlantic hurricane season forecast Thursday, predicting a below-average season with 8 to 14 named storms, 3 to 6 hurricanes, which include 1 to 3 major (Category 3+) storms this year…

    Live Events·4 days ago
  • Strong El Niño to bring warmer winter to Ohio

    One of the strongest-ever El Niño weather patterns is expected to bring a warmer-than-usual winter to Ohio. While a warmer-than-average winter could alleviate some winter heating bills and make travel easier, State…

    Centre Daily Times·4 days ago
  • Chennai sees first widespread northeast monsoon rain, IMD issues alerts

    The Times of India Chennai: After the sun and clouds played a game of hide-and-seek, rains that lashed the suburbs and Chennai reservoir catchment areas spread to core localities by evening, bringing the city’s first…

    The Times of India·4 days ago
  • Met Office chief meteorologist says ‘normal weather’ a thing of the past

    Luke Mais and Anna Wise, Press Association The Met Office’s chief meteorologist has warned that “normal weather” is a thing of the past. Ian Lisk was talking on a panel at the Airports UK annual conference about the…

    Nation.Cymru·5 days ago
  • Another beautiful day ahead for Central Illinois

    DECATUR, Ill. (WAND) – If you’re looking for a reason to get outside, Tuesday is your day. A high-pressure system settling over the Midwest is bringing abundant sunshine and calm winds to Central Illinois, with…

    wandtv.com·18 hrs ago
  • Central Illinois Winter Weather Outlook

    The winter weather outlook for central and southeast Illinois has been released, and a detailed summary is available at this link. Some of the highlights: Current Conditions Latest Observations Daily Climate Maps…

    weather.gov·1 day ago
  • One of the year’s most pleasant weather stretches arrives in Central Illinois

    DECATUR, Ill. (WAND) – A beautiful stretch of sunshine and mild temperatures is settling into the region, and it’s the perfect time to get outside and enjoy it. High pressure is taking control of the Midwest, locking in…

    wandtv.com·1 day ago
  • A great week ahead for Central Illinois

    WAND DECATUR, Ill. (WAND) – A wonderful weekend across Central Illinois carries into the start of the workweek. Overnight lows dip back into the upper 30s tonight with a small risk for patchy frost, though coverage will…

    wandtv.com·2 days ago
  • Sunshine, chilly mornings and a big warm-up ahead for central Illinois

    CENTRAL ILLINOIS (25News Now) - Fall is making an appearance across central Illinois this weekend, but don’t get too comfortable with the chilly temperatures. After a cold start on Sunday morning, sunshine will help…

    25newsnow.com·2 days ago

Air quality

40
Good
Ozone

Air quality is satisfactory, and air pollution poses little or no risk.

Farrar, MO reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:10 AM
Sunset 6:15 PM
Daylight 11 h 4 min (−2 min 17 s tomorrow)
Waxing Gibbous · 74% lit
Moonrise 3:21 PM Moonset 1:19 AM
Full moon Oct 26 New moon Nov 9

Nearby

Forecasters' discussion

From the National Weather Service office in PAH, issued 6 hrs ago

Key Messages

- Areas of fog, some possibly dense, will develop near bodies of water early Wednesday morning.

- Near to slightly above normal temperatures are forecast for the next seven days.

- No rainfall is forecast for the next seven days.

Update

Issued at 505 PM CDT Tue Oct 20 2026

Updated aviation discussion for 00z TAFS.

Discussion

Issued at 1119 AM CDT Tue Oct 20 2026

Sprawling high pressure centered over the eastern and northeast CONUS combined with stable H5 ridging over the southern and central CONUS will bring quiet and stable weather to the region for the next week. Temperatures will be nearly the same each day, with highs in the lower to middle 70s and lows in the middle to upper 40s. The only mentionable weather concern will be for shallow (and possibly briefly dense) fog development early Wednesday morning near bodies of water (lakes, rivers, ponds, etc.). Have added fog to the forecast for these areas.

Aviation

Issued at 505 PM CDT Tue Oct 20 2026

Shallow ground fog will again be possible early Wednesday morning, primarily near bodies of water. CGI is most likely terminal to be impacted. Otherwise VFR conditions with calm or very light NE winds and only a few high clouds (primarily in the west).

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.