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Arthur, IL Weather
Current conditions
Observed at Decatur Airport · 51 min ago
Forecast
10-day-
Saturday Night
Mostly clear, with a low around 43. Southeast wind around 5 mph.
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Sunday
Mostly sunny, with a high near 76. South southeast wind around 3 mph.
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Sunday Night
Mostly cloudy, with a low around 47. South southeast wind around 1 mph.
National Weather Service forecast updated 19 hrs ago.
Hourly
Hourly forecast- Now52°
- 11 PM51°
- Sun12 AM49°
- 1 AM48°
- 2 AM47°
- 3 AM45°
- 4 AM45°
- 5 AM44°
- 6 AM44°
- 7 AM43°
- 8 AM45°
- 9 AM52°
- 10 AM61°
- 11 AM66°
- 12 PM71°
- 1 PM73°
- 2 PM75°
- 3 PM75°
- 4 PM76°
- 5 PM74°
- 6 PM71°
- 7 PM65°
- 8 PM59°
- 9 PM57°
10-day forecast
Details- TonightOct 23Mostly Clear41°
- TodayOct 24Mostly Sunny43°73°
- SunOct 25Mostly Sunny47°76°
- MonOct 26Partly Sunny47°77°
- TueOct 27Partly Sunny50°74°
- WedOct 28Mostly Sunny51°78°
- ThuOct 29Sunny47°76°
- FriOct 30Mostly Sunny10%74°
- SatOct 31Cloudy56°76°
- SunNov 1Heavy rain0.82 in64°75°
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 Arthur
More weather news-
Subtropical Storm Josephine forecast to grow while NHC tracks 2nd Atlantic systemThe tropical outlook as of 8 a.m. Thursday, Oct. 22, 2026. (National Hurricane Center/TNS) Subtropical Storm Josephine cone of uncertainty as of 11 a.m. Thursday, Oct. 22, 2026. (National Hurricane Center/TNS)…
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Hurricane center continues to track system off US East CoastAs of the NHC’s 8 a.m. tropical outlook, a storm-force, nontropical area of low pressure, dubbed AL93, which had formed Sunday night, was located a few hundred miles off the mid-Atlantic United States coast with some…
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Hurricane center tracking system off US East CoastThe National Hurricane Center continued Sunday to forecast a system could develop off the U.S. East Coast that has the potential to develop into a more dangerous storm. As of the NHC’s 8 a.m. tropical outlook, a…
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Thursday, Oct 22, 2026 - Posted by Isabel Miller DOMi & JD BECK, Herbie Hancock… - Barton - Thursday, Oct 22, 26 @ 8:53 am: Oh yeah, and you have to monitor comments between it all. Thank you for the lessons…
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Strong El Niño likely means a milder winter for northern Illinois, climatologist saysAfter a record tornado year, northern Illinois may get a break: forecasters favor a warmer-than-average winter as El Niño strengthens in the Pacific. El Niño refers to a warming of the Pacific Ocean’s surface that…
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Gorgeous weather continues for Central IllinoisWEDNESDAY: Warming up with sunny skies and calm conditions. High: 75 Low: 47 THURSDAY: Above average with sunny skies. High: 76 Low: 47 FRIDAY: Nice weather continues with sunny skies. High: 76 Low: 46 SATURDAY: Some…
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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…
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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…
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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…
Air quality
Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.
Forecast
- SatModerate
- SunModerate
- MonModerate
Decatur, IL reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlyTuscola, records since 1893. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Champaign 49 km
- Decatur 44 km
- Urbana 49 km
- Charleston 35 km
- Mattoon 27 km
- Savoy 42 km
- Mahomet 54 km
- Mount Zion 35 km
- Monticello 36 km
- Shelbyville 44 km
- Sullivan 17 km
- Tuscola 19 km
Forecasters' discussion
From the National Weather Service office in ILX, issued 4 hrs ago
Key Messages
- No significant weather is anticipated across central Illinois over the next week.
Discussion
Issued at 212 PM CDT Sat Oct 24 2026
18z/1pm surface analysis shows a sprawling ridge of high pressure from Quebec to the Gulf Coast. Meanwhile a 992mb low is tracking across northern Manitoba with its trailing cold front extending southward into the Plains. Despite high clouds streaming across the region from the northwest, partial sunshine has heated the dry airmass quite efficiently this afternoon...resulting in current temperatures in the lower to middle 70s. As has been the case for the past several days, readings will quickly drop after sunset...with overnight lows ranging from the lower to middle 40s in the Wabash River Valley to around 50 degrees along/west of the Illinois River.
The Manitoba low will continue to track eastward over the next 24 hours, gradually pulling the cold front southward toward Illinois. However as the boundary becomes parallel with the upper flow, it will lose its southward momentum and remain well W/NW of the KILX CWA. As a result, the stretch of very warm and dry weather will continue through the middle of next week as highs routinely climb into the middle to upper 70s while overnight lows drop into the upper 40s and lower 50s.
A second short-wave trough and its associated surface low traversing southern Canada will push another cold front southward toward the region by the end of the week. With all 12z Oct 24 models showing a slight weakening of the upper ridge, it appears this boundary will drop a bit further south than the first. With GFS precipitable water values edging up to 1.25-1.50 immediately along/ahead of the approaching front, have added 20 PoPs for showers to the forecast Thursday and Thursday night along/north of a Macomb to Minonk line. The front will gradually dissipate and/or lift back northward on Friday, resulting in a return to warm/dry conditions across the board.
Aviation
Issued at 608 PM CDT Sat Oct 24 2026
A high pressure ridge will maintain its position centered near or slightly east of central IL, providing dry conditions but with high clouds and a few mid clouds over the area. Winds SSE 3-7 kts.
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.