Napoleon, OH 43545 Weather

Henry County10:27 PM EDT41.39°N, 84.14°W

Current conditions

Clear
52°
Clear
Feels like 52°
High 67° Wednesday·Low 44° tonight
WindE 6 mph
Humidity71%
Dew point43°
Pressure30.35 inHg
Visibility10 mi
Cloud cover9%
UV index0 Low
Sunrise7:55 AM
Sunset6:49 PM

Observed at Defiance, Defiance Memorial Airport · 1 hr ago

Forecast

10-day

  • Tonight

    Areas of fog after 4am. Partly cloudy, with a low around 44. Northeast wind 0 to 5 mph.

  • Wednesday

    Areas of fog before 10am. Mostly sunny, with a high near 67. North wind around 0 mph.

  • Wednesday Night

    Partly cloudy, with a low around 43. Wind around 0 mph.

National Weather Service forecast updated 1 hr ago.

Hourly

Hourly forecast
  1. Now Mostly Clear 51°
  2. 11 PM Mostly Clear 49°
  3. Wed12 AM Partly Cloudy 48°
  4. 1 AM Partly Cloudy 47°
  5. 2 AM Partly Cloudy 47°
  6. 3 AM Partly Cloudy 46°
  7. 4 AM Areas Of Fog 46°
  8. 5 AM Areas Of Fog 45°
  9. 6 AM Areas Of Fog 44°
  10. 7 AM Areas Of Fog 44°
  11. 8 AM Areas Of Fog 44°
  12. 9 AM Areas Of Fog 46°
  13. 10 AM Partly Sunny 50°
  14. 11 AM Partly Sunny 53°
  15. 12 PM Mostly Sunny 58°
  16. 1 PM Mostly Sunny 61°
  17. 2 PM Sunny 64°
  18. 3 PM Sunny 66°
  19. 4 PM Sunny 67°
  20. 5 PM Sunny 67°
  21. 6 PM Mostly Clear 65°
  22. 7 PM Mostly Clear 62°
  23. 8 PM Mostly Clear 57°
  24. 9 PM Mostly Clear 52°

10-day forecast

Details
  1. TonightOct 20 Partly Cloudy then Areas Of Fog Partly Cloudy then Areas Of Fog44°
  2. WedOct 21 Areas Of Fog then Mostly Sunny Areas Of Fog then Mostly Sunny43°67°
  3. ThuOct 22 Sunny Sunny42°69°
  4. FriOct 23 Sunny Sunny38°65°
  5. SatOct 24 Sunny Sunny42°67°
  6. SunOct 25 Mostly Sunny Mostly Sunny46°72°
  7. MonOct 26 Partly Sunny Partly Sunny43°68°
  8. TueOct 27 Mostly Sunny Mostly Sunny59°
  9. WedOct 28 Cloudy Cloudy0.14 in37°52°
  10. ThuOct 29 Sunny Sunny33°55°

Days after the National Weather Service's seven are MET Norway's outlook, a computer model with no forecaster's review.

Radar

Full map
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Weather news in Ohio

More weather news

Air quality

43
Good
Fine particles (PM2.5)

Air quality is satisfactory, and air pollution poses little or no risk.

Toledo, OH reporting area · 1 hr ago. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:55 AM
Sunset 6:49 PM
Daylight 10 h 54 min (−2 min 37 s tomorrow)
Waxing Gibbous · 73% lit
Moonrise 4:07 PM Moonset 1:49 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low61° / 39°
Record high84° (1953)
Record low19° (1972)
Wettest1.45 in (2011)
Yesterday64° / 36°
Month to date1.62 in (normal 1.70 in)

Wauseon Water Plant, records since 1893. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in IWX, issued 3 hrs ago

Key Messages

- Dense fog possible early Wednesday morning, especially along and east of I-69.

- Tranquil fall weather continues with mild temperatures and sunshine through this week into the weekend.

Discussion

Issued at 1245 PM EDT Tue Oct 20 2026

With high pressure over southern Ontario and prominent upper level ridging over the central CONUS expected to build into the Great Lakes over the next several days, a tranquil week is ahead. Expect lots of sunshine, light winds, and highs generally in the upper 60s to low 70s each day. Little to no rainfall is expected over the next 7 days and mainly dry conditions look to continue through at least the end of the month. We may see some showers out of a cold frontal passage early next week but for now chances remain very low (15% or less).

Despite some clouds over northwest Ohio and northeast Indiana overnight with a weak backdoor cold front from Lake Erie, patchy to widespread dense fog is possible overnight into Wednesday morning. Light easterly flow may allow for advection fog to develop, especially along and east of I-69. Forecast soundings indicate potential for small dewpoint depressions as temperatures and dewpoints are both expected to be in the low to mid 40s tonight. The best timeframe for dense fog will be between 3 AM to 9 AM EDT Wednesday, with the lowest visibilities at or just before daybreak. Current NBM probabilities are about 20-30% for visibilities less than 3 miles while HREf guidance suggests visibilities may go down to less than 1 mile especially in NW Ohio; given that there are still uncertainties and that fog can be quite fickle to forecast, future shifts may need to hoist an SPS or even a Dense Fog Advisory depending on how low visibilities drop.

Aviation

Issued at 720 PM EDT Tue Oct 20 2026

Main aviation concern is potential for fog/stratus at KFWA late tonight given cool/moist NE flow off Lake Erie. Confidence is not high that fog will reach that far inland but some guidance members do suggest dense fog could push as far west as KFWA. Will hold with a TEMPO 1SM/BKN008 mention for now and let the overnight shift reassess for the 06Z TAF's. VFR expected to persist at KSBN.

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.