Saint Charles, MN Weather

Winona County8:53 PM CDT43.97°N, 92.06°WElevation 1,129 ft

Current conditions

Mostly Cloudy
65°
Mostly Cloudy
Feels like 65°
High 73° Saturday·Low 57° tonight
WindSE 13 mph gusts 22 mph
Humidity60%
Dew point51°
Cloud cover53%
Sunrise7:33 AM
Sunset6:13 PM

Forecast for this hour (no station report in the last two hours)

Forecast

10-day

  • Friday Night

    Mostly cloudy, with a low around 57. South wind 12 to 16 mph, with gusts as high as 24 mph.

  • Saturday

    Partly sunny, with a high near 73. South wind 13 to 16 mph, with gusts as high as 25 mph.

  • Saturday Night

    A slight chance of rain showers after 7pm. Mostly cloudy, with a low around 52. West wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

National Weather Service forecast updated 2 days ago.

Hourly

Hourly forecast
  1. Now Mostly Cloudy 65°
  2. 9 PM Mostly Cloudy 64°
  3. 10 PM Mostly Cloudy 63°
  4. 11 PM Mostly Cloudy 62°
  5. Sat12 AM Mostly Cloudy 61°
  6. 1 AM Mostly Cloudy 60°
  7. 2 AM Mostly Cloudy 60°
  8. 3 AM Mostly Cloudy 59°
  9. 4 AM Mostly Cloudy 59°
  10. 5 AM Mostly Cloudy 58°
  11. 6 AM Partly Sunny 58°
  12. 7 AM Partly Sunny 57°
  13. 8 AM Partly Sunny 59°
  14. 9 AM Partly Sunny 60°
  15. 10 AM Mostly Sunny 62°
  16. 11 AM Partly Sunny 65°
  17. 12 PM Partly Sunny 68°
  18. 1 PM Partly Sunny 71°
  19. 2 PM Partly Sunny 71°
  20. 3 PM Partly Sunny 72°
  21. 4 PM Partly Sunny 73°
  22. 5 PM Partly Sunny 71°
  23. 6 PM Mostly Cloudy 69°
  24. 7 PM Slight Chance Rain Showers 66°16%

10-day forecast

Details
  1. TonightOct 20 Clear Clear44°
  2. WedOct 21 Sunny Sunny48°72°
  3. ThuOct 22 Patchy Fog then Mostly Sunny Patchy Fog then Mostly Sunny51°73°
  4. TodayOct 23 Mostly Sunny Mostly Sunny57°71°
  5. SatOct 24 Partly Sunny Partly Sunny16%52°73°
  6. SunOct 25 Slight Chance Rain Showers Slight Chance Rain Showers39%44°59°
  7. MonOct 26 Chance Rain Showers Chance Rain Showers44%39°54°
  8. TueOct 27 Slight Chance Rain Showers then Mostly Sunny Slight Chance Rain Showers then Mostly Sunny24%53°
  9. WedOct 28 Sunny Sunny30°48°
  10. ThuOct 29 Partly cloudy Partly cloudy33°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
Open the National Weather Service radar (the map here needs JavaScript).

Weather news in Minnesota

More weather news

Air quality

Forecast

  • FriModerate (55)
  • SatGood (50)
  • SunGood

Mississippi River Valley, MN reporting area. Data from AirNow (EPA and its state, local and tribal partners); preliminary and subject to change.

Sun & moon

Sunrise 7:33 AM
Sunset 6:13 PM
Daylight 10 h 39 min (−2 min 51 s tomorrow)
Waxing Gibbous · 94% lit
Moonrise 4:44 PM Moonset 4:38 AM
Full moon Oct 26 New moon Nov 9

Nearby

Forecasters' discussion

From the National Weather Service office in ARX, issued 1 hr ago

Key Messages

- Low potential for light rainfall this afternoon/evening and again late Saturday, but mostly dry conditions continue through Sunday.

- Greater rainfall potential exists Monday into Tuesday (40-70%) though the heaviest rain amounts look to stay northwest of the area. Additional potential exists mid next week.

- Temperatures trend cooler next week, but look to remain above normal.

Discussion

Issued at 100 PM CDT Fri Oct 23 2026

This Afternoon - Sunday: Mostly Dry, Low Precipitation Potential

Primarily dry conditions continue throughout the rest of this afternoon and through much of the weekend as upper level ridging slowly shifts eastward. However, an area of shortwave energy reflected at 700-500hPa currently over the north-central Iowa/south- central Minnesota is expected to continue lifting northward along the western side of the ridge this afternoon into the evening. 700- 500hPa positive vorticity advection and 700hPa frontogenesis associated with this shortwave trough combined with some modest mid to upper level moisture advection may result in scattered sprinkles to light showers this afternoon. Not expecting much in the way of impacts, if we even see rain at the surface at all, as dry air below 10kft depicted in RRFS/RAP/HRRR soundings acts to evaporate the bulk of any rain as it falls. However, there have been observations of light rain associated with these forcings upstream so a few hundreths of rain does not appear unreasonable.

While the shortwave trough continues working its way across our area tonight, a strong upper level low moves eastward across Canada, dragging a cold front into the Upper Midwest by late Saturday. This feature stalls out across Minnesota into northern Wisconsin as it becomes separated from the upper level support, remaining somewhere north of I-90 into Sunday. Weak moisture advects along this boundary under southerly flow as various shortwave troughs eject northward from a cutoff low across the Desert Southwest, promoting some low chances for light rain late Saturday through Sunday (10-20%).

Next Week: Greater Precipitation Potential, Trending Cooler

The stalled cold front begins to slowly sag southward late Sunday into early next week, allowing cooler air to filter into the region. There's still some uncertainty regarding what temperatures will ultimately be due to variations in how far south the boundary makes it and the influence from potential rainfall, but the 23.13z NBM mean suggests highs top out in the upper 50s to low 60s.

Aviation

Issued at 706 PM CDT Fri Oct 23 2026

Ongoing light rain scattered in nature expected to exit east of the forecast area through the evening hours. Besides low potential for FG impacts in River Valleys overnight, subsequent widespread flight impacts possible Saturday night into Sunday morning.

Arx Watches

WI...None. MN...None. IA...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.