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Altamont, IL 62411 Weather
Current conditions
Observed at Effingham, Effingham County Memorial Airport · 57 min ago
Forecast
10-day-
Today
Sunny, with a high near 74. East southeast wind around 5 mph.
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Tonight
Mostly clear, with a low around 46. East southeast wind around 3 mph.
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Saturday
Sunny, with a high near 73. East southeast wind around 5 mph.
National Weather Service forecast updated 5 hrs ago.
Hourly
Hourly forecast- Now69°
- 1 PM72°
- 2 PM73°
- 3 PM74°
- 4 PM74°
- 5 PM72°
- 6 PM69°
- 7 PM64°
- 8 PM58°
- 9 PM56°
- 10 PM55°
- 11 PM53°
- Sat12 AM53°
- 1 AM51°
- 2 AM50°
- 3 AM49°
- 4 AM48°
- 5 AM48°
- 6 AM48°
- 7 AM46°
- 8 AM48°
- 9 AM53°
- 10 AM61°
- 11 AM65°
10-day forecast
Details- TodayOct 23Sunny46°74°
- SatOct 24Sunny46°73°
- SunOct 25Mostly Sunny47°76°
- MonOct 26Partly Sunny48°75°
- TueOct 27Partly Sunny48°73°
- WedOct 28Mostly Sunny48°74°
- ThuOct 29Sunny47°74°
- FriOct 30Sunny41°62°
- SatOct 31Cloudy46°64°
- SunNov 1Cloudy0.04 in53°71°
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 in Illinois
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Sun & moon
Nearby
Forecasters' discussion
From the National Weather Service office in ILX, issued 52 min ago
Key Messages
- Sunny mild days and cool nights persist across central and southeast Illinois through Wednesday, with highs in the 70s and lows in the 40s.
- A cold front moves across the region mid to late next week, though rain chances look pretty slim (30% or less), with temperatures cooling a bit for the end of next week.
Discussion
Issued at 203 AM CDT Fri Oct 23 2026
The blocking pattern continues over the eastern half of the United States. With the ridging not going anywhere any time soon, clear skies, light winds, and dry weather will continue across the state into the next week. Overall, perfect weather for the latter half of harvest season. The main focus of this forecast continues to be the above normal temperatures and lack of rain.
Temperatures will continue to be above normal as we move into the next week. Highs will be in the mid to upper 70s. Normals for this time of year is around 62-66 degrees across central and southeastern IL. The CPC's 6-10 day, 8-14 day, and Week 3-4 outlooks all show above normal temperatures. Dry weather will last through much of the extended period as well.
Looks like a cold front will try to makes its way into IL early next week, but with how dry the airmass is, it will have a hard fight to squeeze out any impactful rainfall, if it can even make it to central IL. However, there are some <30% chances for rain for late in the week when a stronger shortwave pushes into the region, breaking down this ridging pattern we are stuck in.
Aviation
Issued at 1200 PM CDT Fri Oct 23 2026
VFR conditions to continue through Saturday, with only scattered high-level clouds at times. South/southeast winds will average 5-7 knots through the period.
Ilx Watches
None.
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.