Illiopolis, Illinois Weather
Illiopolis, Illinois — live current conditions, hourly and 7-day forecasts, NWS alerts, radar and satellite imagery, soil and crop conditions for Illiopolis, Sangamon County.
Full aviation weather for Illiopolis is published on the Decatur Airport (KDEC) page, 32 km away. It carries the current METAR decoded into plain language — surface wind, visibility, cloud layers and ceiling, temperature and dewpoint, and altimeter setting — alongside the raw observation as transmitted. 4 airfields within reach of Illiopolis have their own pages, listed below.
The Terminal Aerodrome Forecast (TAF) is shown across its full validity period, with each change group broken out so you can see when conditions are expected to shift. Flight category is derived automatically — VFR, MVFR, IFR or LIFR — from reported ceiling and visibility, with runway details and field elevation alongside. Observations update roughly hourly and forecasts several times a day.
Other airports near Illiopolis: Logan County Airport (KAAA) 35 km · Taylorville Municipal Airport (KTAZ) 36 km · Abraham Lincoln Capital Airport (KSPI) 37 km
Conditions reported at KDEC describe the airfield itself. Weather 32 km away can differ, particularly in terrain or near the coast. For conditions at Illiopolis specifically, see the current conditions and forecast above.
Soil conditions, frost risk and crop weather for Illiopolis.
About Illiopolis, Illinois
Illiopolis rests on the gently rolling prairie lands of central Illinois, a place where the horizon stretches wide and the sky feels immense. It lies 15.3 miles west of Decatur, IL (from Decatur, IL: bearing 274°T), and is situated 8.4 miles west of Harristown. The fields, a patchwork quilt of green and gold depending on the season, sweep away from the modest cluster of buildings that form the heart of Illiopolis, their surfaces catching the sun's slow descent and painting the air with a soft, amber glow. The streets are quiet, lined with sturdy, unassuming homes and the occasional mature oak, their branches reaching out like ancient, gnarled fingers against the vast expanse of the heavens. A palpable sense of stillness pervades the air, broken only by the distant hum of agricultural machinery or the chirping of unseen birds in the hedgerows. The history of Illiopolis is deeply entwined with the fertile soil that surrounds it, a legacy built on the perseverance of those who first tilled these lands. Its economy has long been anchored by agriculture, the bounty of corn and soybeans a testament to the region's enduring connection to the earth. Over the years, the needs of the farming community have shaped the character of Illiopolis, fostering a spirit of self-reliance and a quiet interdependence among its residents. While not marked by grand monuments, the true landmarks here are the weathered barns, the silos that punctuate the skyline, and the enduring sense of place that has been cultivated over generations, a subtle testament to lives lived in harmony with the open prairie.
Live animated radar for Illiopolis and surroundings — RainViewer.
NOAA GOES-16 GEOCOLOR — live animated loop updated every 10 minutes. Shows cloud cover, storm systems and weather patterns across the continental US.
Source: NOAA/NESDIS GOES-East · Public domain · Auto-updates on page reload
| Location | Illiopolis, Sangamon County, Illinois |
| Coordinates | 39.853654°N, 89.242029°W |
| Timezone | Central Time (America/Chicago) |
| ZIP Code(s) | 62539 |
| Area Code | 217 |
| Page generated | September 2026 |
| Weather data | Open-Meteo (open-source), NOAA National Weather Service |
About This Illiopolis, Illinois Weather Page
This page provides live weather conditions and forecasts for Illiopolis, Illinois, including current conditions, a 24-hour hourly forecast, 7-day outlook, NWS extended text forecast, precipitation radar and NOAA GOES-16 satellite imagery. Aviation weather — live METAR observations and TAF forecasts — is published separately on the pages for the nearest reporting airports, linked from the aviation section above. Additional sections may include tide predictions, wave height, wave direction and sea-surface temperature, a barometric pressure trend, and a solunar-based fishing forecast with a fishing-conditions rating for coastal localities, and soil temperature, crop weather and live USGS river gauge data for agricultural areas near a monitored waterway. All data updates automatically on every page visit.
Location data for Illiopolis includes coordinates 39.853654°N, 89.242029°W, situated in Sangamon County. ZIP code 62539. Telephone area code: 217. Timezone: Central Time (America/Chicago).
Weather data is sourced from the NOAA National Weather Service (NWS) and the open-source Open-Meteo API. River and stream data is sourced from the USGS National Water Information System. Tide predictions are sourced from NOAA CO-OPS; marine and solunar data are modeled from Open-Meteo and public sunrise/moon calculations and should be treated as a general guide alongside on-the-water conditions. Radar is provided by RainViewer. Satellite imagery is sourced from NOAA/NESDIS GOES-East and is public domain.
