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Ottawa, OH 45875 Weather
Current conditions
Observed at Ottawa Putnam County Airport · 1 hr ago
Forecast
10-day-
This Afternoon
Sunny, with a high near 68. North wind 0 to 5 mph.
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Tonight
Areas of fog after 4am. Mostly clear, with a low around 41. Northwest wind 0 to 5 mph.
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Thursday
Areas of fog before 10am. Mostly sunny, with a high near 69. Northwest wind 0 to 5 mph.
National Weather Service forecast updated 2 hrs ago.
Hourly
Hourly forecast- Now66°
- 3 PM66°
- 4 PM67°
- 5 PM68°
- 6 PM66°
- 7 PM63°
- 8 PM58°
- 9 PM52°
- 10 PM50°
- 11 PM48°
- Thu12 AM46°
- 1 AM45°
- 2 AM44°
- 3 AM43°
- 4 AM43°
- 5 AM43°
- 6 AM42°
- 7 AM42°
- 8 AM41°
- 9 AM45°
- 10 AM52°
- 11 AM57°
- 12 PM61°
- 1 PM65°
10-day forecast
Details- TodayOct 21Sunny41°68°
- ThuOct 22Areas Of Fog then Mostly Sunny42°69°
- FriOct 23Sunny38°67°
- SatOct 24Sunny43°69°
- SunOct 25Mostly Sunny47°73°
- MonOct 26Mostly Sunny46°69°
- TueOct 27Slight Chance Rain Showers20%41°63°
- WedOct 28Cloudy54°73°
- ThuOct 29Showers0.15 in48°75°
- FriOct 30Sunny40°58°
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 Ottawa
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Air quality
Air quality is satisfactory, and air pollution poses little or no risk.
Lima, OH reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.
Sun & moon
Almanac
MonthlyLima Wwtp, records since 1901. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
Forecasters' discussion
From the National Weather Service office in IWX, issued 58 min ago
Key Messages
- Locally dense fog possible again early Thursday morning, especially along and south of US 24.
- Tranquil fall weather continues with mild temperatures and sunshine through this week into the weekend.
Discussion
Issued at 138 PM EDT Wed Oct 21 2026
Very few changes were made to the forecast today as a persistence forecast was largely utilized through the weekend. A large area of surface high pressure remains over the Northeastern US extending back across the Great Lakes. With amplified upper level ridging over the central CONUS building into the Great Lakes through the weekend, a tranquil week is ahead. Expect lots of sunshine, light winds, and highs generally in the upper 60s to low 70s each day. Sunday will be the warmest day of the week with the upper level ridge centered overhead and highs in the low to mid 70s. Little to no rainfall is expected over the next 7 days; We could see some showers out of a cold frontal passage early next week late Monday night into Tuesday but for now chances remain very low (15-20%) as it remains to be seen if there will be sufficient forcing and moisture available. Towards the middle of next week, temperature generally trend towards normal with highs around 60 degrees as the aforementioned synoptic pattern breaks down.
Locally dense fog is possible again overnight into Thursday morning, especially in northeast Indiana and northwest Ohio along and south of US 24. Light N/NE flow may allow for advection fog to develop again. Forecast soundings indicate potential for small dewpoint depressions as temperatures and dewpoints are both expected to be in the low 40s tonight. Much like last night, the best timeframe for dense fog will be between 3 AM to 11 AM EDT Thursday, with the lowest visibilities around daybreak. A SPS or Dense Fog Advisory may be needed overnight depending on trends and where any fog develops.
Aviation
Issued at 125 PM EDT Wed Oct 21 2026
Primary challenge, much like yesterday, revolves around fog/stratus development at KFWA overnight. Model signals seem to keep the worst just SE of KFWA, but a few indications at least some impacts remains. Will continue with a predominate MVFR vsby at KFWA, with the potential for greater impacts in the 9Z to 14Z window than currently forecasted. Any fog/stratus should burn off between 14 and 16Z. KSBN should be spared any impacts at this point.
Otherwise no flight concerns outside this window.
Iwx Watches
IN...None. OH...None. MI...None. MARINE...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.