Sparta, WI Weather

Monroe County5:37 AM CDT43.94°N, 90.81°WElevation 791 ft

Current conditions

Clear
32°
Clear
Feels like 32°
High 70°·Low 37° tonight
WindCalm
Humidity97%
Dew point31°
Pressure30.37 inHg
Visibility10.0 mi
Cloud cover35%
UV index0 Low
Sunrise7:25 AM
Sunset6:13 PM

Observed at Sparta, Sparta / Fort McCoy Airport · 42 min ago

Forecast

10-day

  • Overnight

    Patchy fog. Partly cloudy, with a low around 37. Northeast wind around 3 mph.

  • Tuesday

    Patchy fog before 11am. Sunny. High near 70, with temperatures falling to around 67 in the afternoon. Southeast wind 3 to 9 mph.

  • Tuesday Night

    Mostly clear, with a low around 42. South wind 1 to 6 mph.

National Weather Service forecast updated 2 hrs ago.

Hourly

Hourly forecast
  1. Now Patchy Fog 37°
  2. 6 AM Patchy Fog 37°
  3. 7 AM Patchy Fog 37°
  4. 8 AM Patchy Fog 37°
  5. 9 AM Patchy Fog 42°
  6. 10 AM Patchy Fog 51°
  7. 11 AM Sunny 57°
  8. 12 PM Sunny 62°
  9. 1 PM Sunny 66°
  10. 2 PM Sunny 67°
  11. 3 PM Sunny 68°
  12. 4 PM Sunny 69°
  13. 5 PM Sunny 67°
  14. 6 PM Clear 63°
  15. 7 PM Clear 58°
  16. 8 PM Clear 52°
  17. 9 PM Clear 50°
  18. 10 PM Clear 47°
  19. 11 PM Clear 46°
  20. Wed12 AM Clear 45°
  21. 1 AM Clear 45°
  22. 2 AM Clear 44°
  23. 3 AM Mostly Clear 44°
  24. 4 AM Mostly Clear 42°

10-day forecast

Details
  1. TonightOct 19 Patchy Fog Patchy Fog37°
  2. TodayOct 20 Patchy Fog then Sunny Patchy Fog then Sunny42°70°
  3. WedOct 21 Sunny Sunny44°71°
  4. ThuOct 22 Sunny Sunny47°72°
  5. FriOct 23 Mostly Sunny Mostly Sunny52°69°
  6. SatOct 24 Partly Sunny Partly Sunny52°70°
  7. SunOct 25 Partly Sunny Partly Sunny15%44°67°
  8. MonOct 26 Slight Chance Rain Showers Slight Chance Rain Showers16%60°
  9. TueOct 27 Cloudy Cloudy35°47°
  10. WedOct 28 Mostly sunny Mostly sunny33°51°

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 near Sparta

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Air quality

32
Good
Fine particles (PM2.5)

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

Forecast

  • TueGood
  • WedGood
  • ThuGood

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

Sun & moon

Sunrise 7:25 AM
Sunset 6:13 PM
Daylight 10 h 48 min (−2 min 51 s tomorrow)
Waxing Gibbous · 67% lit
Moonrise 3:40 PM Moonset 1:10 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Record high80° (2024)
Record low21° (2018)
Wettest0.08 in (2025)
Month to date1.26 in (normal 0.00 in)

Sparta Fort Mccoy, records since 2013. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in ARX, issued 4 hrs ago

Key Messages

- Unseasonably warm into the weekend.

- Dry through Thursday night and then maybe some small rain chances from Friday into the weekend.

- Much uncertainty on temperatures and rain chances early next week.

Discussion

Issued at 1146 PM CDT Mon Oct 19 2026

Today through Thursday night

An anomalous 500 mb ridge will remain in control of the area's weather through Thursday night. This high will provide dry weather and unseasonably warm temperatures. High temperatures will warm from the mid- and upper 60s today and be in the lower and mid-70s on Thursday. Low temperatures will be in the 30s and 40s tonight and Wednesday night and in the 40s and 50s on Thursday night.

Friday and Friday night

A negatively tilted trough will move through Minnesota and western and northern Wisconsin. There is still plenty of uncertainty on whether there will be enough low-level moisture for any rain to move into our area.

With some more cover, high temperatures will be a bit cooler (mainly in the 60s). Low temperatures will be a bit warmer (upper 40s to mid-50s).

Aviation

Issued at 1239 AM CDT Tue Oct 20 2026

Patchy fog is developing across the region at issuance time with this expected to focus within river valleys into early Tuesday morning, primarily impacting ONA/LSE/PDC/OVS. Have continued to carry an IFR TEMPO group at LSE to cover this potential. Otherwise, skies will be mostly to completely clear with winds out of the southeast over the next 24 hours.

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 4Conservative index and reflects what the press published. Terms of use.