Install
Fairfield, IL Weather
Current conditions
Observed at Fairfield, Fairfield Municipal Airport · 1 hr ago
Forecast
10-day-
This Afternoon
Sunny, with a high near 74. North wind around 1 mph.
-
Tonight
Clear. Low around 45, with temperatures rising to around 47 overnight. Wind around 0 mph.
-
Thursday
Sunny, with a high near 75. North northeast wind 0 to 3 mph.
National Weather Service forecast updated 1 hr ago.
Hourly
Hourly forecast- Now73°
- 3 PM74°
- 4 PM74°
- 5 PM73°
- 6 PM70°
- 7 PM65°
- 8 PM59°
- 9 PM57°
- 10 PM55°
- 11 PM53°
- Thu12 AM51°
- 1 AM50°
- 2 AM49°
- 3 AM48°
- 4 AM48°
- 5 AM47°
- 6 AM46°
- 7 AM45°
- 8 AM47°
- 9 AM53°
- 10 AM62°
- 11 AM67°
- 12 PM70°
- 1 PM73°
10-day forecast
Details- TodayOct 21Sunny45°74°
- ThuOct 22Sunny46°75°
- FriOct 23Sunny45°74°
- SatOct 24Mostly Sunny46°74°
- SunOct 25Mostly Sunny47°77°
- MonOct 26Partly Sunny48°76°
- TueOct 27Partly Sunny47°72°
- WedOct 28Cloudy53°77°
- ThuOct 29Cloudy0.03 in54°77°
- FriOct 30Mostly sunny43°62°
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 Fairfield
More weather news-
FROST ADVISORY IN EFFECT FOR TONIGHT AND EARLY SUNDAYWFIW FROST ADVISORY IN EFFECT FOR TONIGHT AND EARLY SUNDAY The next week is expected to be dry with temperatures fairly close to normal. A gradual warmup is expected. Longer range forecasts show above normal…
-
Another beautiful day ahead for Central IllinoisDECATUR, 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…
- 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…
-
One of the year’s most pleasant weather stretches arrives in Central IllinoisDECATUR, 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…
-
A great week ahead for Central IllinoisWAND 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…
-
Sunshine, chilly mornings and a big warm-up ahead for central IllinoisCENTRAL 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…
-
Overnight Frost Advisory for parts of Illinois, NW IndianaCBS News Colorado 10pm Saturday CBS News Detroit Weekend 11pm CBS News Los Angeles Weekend 9pm CBS News Philadelphia Weekend 11pm KDKA News Weekend 11pm CBS News Texas Weekend 10pm
-
Frost advisory back in effect for Central IllinoisWAND DECATUR, Ill. (WAND) – Another cool day starts the weekend across Central Illinois with highs Saturday only reaching the upper 50s under plenty of sunny skies. Strong high pressure remains in control keeping skies…
- Illinois Winter Weather: First Snow Before Thanksgiving, Nov. 26?
Chicago, IL – Illinois residents wondering when the first measurable snowfall of the 2026 winter season might arrive could see dramatically different conditions depending on where they live. While Chicago typically…
-
Frosty Nights Ahead Before a Warm-Up Arrives in Central IllinoisCENTRAL ILLINOIS (25News Now) - Central Illinois is in for a chilly weekend, with temperatures dropping into the 30s and frost possible overnight. But after a cool start to the weekend, a warming trend will bring…
Air quality
Air quality is satisfactory, and air pollution poses little or no risk.
Forecast
- WedModerate
- ThuModerate
- FriModerate
Evansville, IN reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
Monthly1 Ene Fairfield, records since 1896. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Mount Vernon 48 km
- Olney 46 km
- Salem 58 km
- Mount Carmel 52 km
- Carmi 37 km
- Flora 34 km
- Sumner 57 km
- McLeansboro 35 km
- Ina 54 km
Forecasters' discussion
From the National Weather Service office in PAH, issued 2 hrs ago
Key Messages
- Areas of dense fog will continue late overnight into the morning hours near bodies of water.
- Generally clear and temperate conditions will remain through the weekend.
- A small chance of a shower exists early next week, though confidence is low.
Discussion
Issued at 1219 PM CDT Wed Oct 21 2026
An UL omega block has been established, with our CWA on the eastern edge of the 250 mb ridge as of 16z. As such, high surface pressure will be dominant until Monday at the earliest, leaving generally cloudless skies and seasonable, if not slightly above average, temperatures. Tuesday, long-range guidance suggests weak FROPA associated with the easterly progression of the UL trough, but vorticity and frontogenesis values are low, and 250 mb flow is only weakly perturbed. GFS and ECMWF 500 mb relative humidity prog <40%, so chances of widespread precipitation are minimal. A brief shower or two cannot be ruled out though, especially Tuesday morning in western parts of our coverage area.
Given weak surface flow, patchy areas of dense radiation fog are possible near bodies of water and in surrounding low-lying areas overnight through the morning. Widely scattered clouds tomorrow morning will not hinder the suns ability to quickly erode this fog, so expect the fog threat to be eliminated by 15z tomorrow.
Aviation
Issued at 1209 PM CDT Wed Oct 21 2026
High pressure will continue to bring calm or very light NE winds through the forecast period. Low-lying river valley fog development is expected again during the 11-13z Thursday period. Included this in the CGI and OWB TAFs where impacts are most likely. Otherwise, VFR conditions are expected.
Pah Watches
IL...None. MO...None. IN...None. KY...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.