Ottawa, Illinois Weather
Ottawa, Illinois — live current conditions, hourly and 7-day forecasts, NWS alerts, radar and satellite imagery, soil and crop conditions for Ottawa, LaSalle County.
Full aviation weather for Ottawa is published on the Cushing Field Ltd Airport (K0C8) page, 28 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. 6 airfields within reach of Ottawa 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 Ottawa: Morris Municipal Airport James R. Washburn field (KC09) 36 km · Dwight Airport (KDTG) 41 km · Hinckley Airport (K0C2) 49 km · Aurora Municipal Airport (KARR) 56 km · Joliet Regional Airport (KJOT) 59 km
Conditions reported at K0C8 describe the airfield itself. Weather 28 km away can differ, particularly in terrain or near the coast. For conditions at Ottawa specifically, see the current conditions and forecast above.
Soil conditions, frost risk and crop weather for Ottawa.
About Ottawa, Illinois
Ottawa, Illinois, unfolds across a landscape where the Illinois and Fox Rivers converge, their waters reflecting the broad, open skies of the Prairie State. It lies 34.5 miles south-west of Oswego, IL (from Oswego, IL: bearing 228°T), and is situated 8.1 miles south-east of LaSalle. Rolling hills, softened by agricultural fields and stands of sturdy oak and maple, give way to the flatter, fertile plains that have long defined this region. The air here carries a distinct crispness, especially in the autumn, a tangible reminder of the vast agricultural expanse stretching in every direction. Even in the midst of its settled streets, the presence of the wide rivers and the whispering prairie grasses feels ever-present, shaping the very character of Ottawa. The history of Ottawa is deeply entwined with its waterways, serving as a vital hub for commerce and transportation since its founding. The Illinois and Michigan Canal, a significant engineering feat of its time, brought prosperity and people to Ottawa, fostering an economy built on trade and industry. Evidence of this past can be seen in the sturdy brick buildings that line its historic downtown, a silent testament to the robust trade that once flowed through its port. Today, agriculture remains a cornerstone, with vast fields of corn and soybeans painting the surrounding countryside, while tourism draws visitors to its riverfront parks and the nearby Starved Rock State Park, a natural wonder that has captivated imaginations for generations.
Live animated radar for Ottawa 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 | Ottawa, LaSalle County, Illinois |
| Coordinates | 41.345589°N, 88.842577°W |
| Timezone | Central Time (America/Chicago) |
| ZIP Code(s) | 61350 |
| Area Code | 815 |
| Page generated | September 2026 |
| Weather data | Open-Meteo (open-source), NOAA National Weather Service |
About This Ottawa, Illinois Weather Page
This page provides live weather conditions and forecasts for Ottawa, 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 Ottawa includes coordinates 41.345589°N, 88.842577°W, situated in LaSalle County. ZIP code 61350. Telephone area code: 815. 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.
