Ottawa, Illinois Weather
Ottawa, Illinois — live current conditions, hourly and 7-day forecasts, NWS alerts, aviation weather, radar and satellite imagery, soil and crop conditions for Ottawa, LaSalle County.
Flight conditions near Ottawa. Data source: locating…
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 | July 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, real-time aviation weather (live METAR and TAF reports from the nearest reporting airport, with a modeled estimate shown when no station is in range), precipitation radar and NOAA GOES-16 satellite imagery. 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. Aviation data is sourced from aviationweather.gov (NOAA), with a modeled estimate used where no nearby reporting station is available. 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.
