Lancaster, WI Weather

Grant County2:57 AM CDT42.85°N, 90.71°WElevation 1,099 ft

Current conditions

Fog/Mist
50°
Fog/Mist
Feels like 50°
High 73°·Low 51° tonight
WindCalm
Humidity94%
Dew point48°
Pressure30.24 inHg
Visibility2.0 mi
Cloud cover18%
UV index0 Low
Sunrise7:26 AM
Sunset6:09 PM

Observed at Boscobel, Boscobel Airport · 1 hr ago

Forecast

10-day

  • Tonight

    Mostly clear. Low around 51, with temperatures rising to around 53 overnight. Southeast wind around 5 mph.

  • Friday

    Mostly sunny. High near 73, with temperatures falling to around 70 in the afternoon. Southeast wind 5 to 12 mph.

  • Friday Night

    Mostly cloudy, with a low around 54. Southeast wind around 9 mph.

National Weather Service forecast updated 13 hrs ago.

Hourly

Hourly forecast
  1. Now Mostly Clear 56°
  2. 3 AM Mostly Clear 55°
  3. 4 AM Mostly Clear 54°
  4. 5 AM Mostly Clear 53°
  5. 6 AM Sunny 52°
  6. 7 AM Sunny 51°
  7. 8 AM Sunny 52°
  8. 9 AM Sunny 56°
  9. 10 AM Sunny 60°
  10. 11 AM Sunny 64°
  11. 12 PM Mostly Sunny 67°
  12. 1 PM Mostly Sunny 69°
  13. 2 PM Mostly Sunny 71°
  14. 3 PM Sunny 73°
  15. 4 PM Sunny 71°
  16. 5 PM Mostly Sunny 70°
  17. 6 PM Partly Cloudy 68°
  18. 7 PM Mostly Cloudy 65°
  19. 8 PM Partly Cloudy 62°
  20. 9 PM Mostly Cloudy 61°
  21. 10 PM Partly Cloudy 60°
  22. 11 PM Mostly Cloudy 60°
  23. Sat12 AM Mostly Cloudy 59°
  24. 1 AM Mostly Cloudy 58°

Daily forecast

Details
  1. ThuOct 22 Sunny Sunny51°75°
  2. TodayOct 23 Mostly Sunny Mostly Sunny54°73°
  3. SatOct 24 Partly Sunny Partly Sunny53°71°
  4. SunOct 25 Partly Sunny Partly Sunny50°69°
  5. MonOct 26 Mostly Cloudy Mostly Cloudy10%46°62°
  6. TueOct 27 Slight Chance Rain Showers Slight Chance Rain Showers16%46°59°
  7. WedOct 28 Slight Chance Rain Showers Slight Chance Rain Showers23%46°62°
  8. ThuOct 29 Mostly sunny Mostly sunny32°53°

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 Wisconsin

More weather news

Air quality

55
Moderate
Fine particles (PM2.5)

Acceptable. Unusually sensitive people should consider limiting prolonged outdoor exertion.

Forecast

  • FriModerate
  • SatGood
  • SunModerate

Driftless Area South, 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 7:26 AM
Sunset 6:09 PM
Daylight 10 h 42 min (−2 min 44 s tomorrow)
Waxing Gibbous · 90% lit
Moonrise 4:39 PM Moonset 4:33 AM
Full moon Oct 26 New moon Nov 9

Almanac

Monthly
Normal high / low56° / 37°
Month to date3.80 in (normal 2.13 in)

Lancaster 4 Wsw, records since 1893. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).

Nearby

Forecasters' discussion

From the National Weather Service office in ARX, issued 8 hrs ago

Key Messages

- Abnormal warmth continues into this weekend as temperatures 15-20 degrees above normal are expected.

- Low precipitation potential exists late Saturday into early Sunday (10-20%), increasing slightly Monday through Tuesday (30-40%).

- Temperatures trend cooler and towards normal through the beginning of next week.

Discussion

Issued at 120 PM CDT Thu Oct 22 2026

Tonight - Saturday: Abnormal Warmth Continues; Low Precipitation Potential

Upper level ridging and anomalously high 500hPa heights remain situated across much of the central United States through at least Saturday while southerly flow and weak warm air advection continue under said ridge resulting in 850hPa temperatures around 10-14C. Given these warm temperatures aloft, continue to expect abnormal warmth as we head into the weekend, roughly 15 to 20 degrees above normal.

Upper level troughing begins to move across the United States/Canada border tonight, phasing with a shortwave that ejects off a cutoff low across the southwest United States. Surface cyclogenesis occurs over the northern Great Plains on Friday as a result, leading to a developing 850hPa low level jet from Nebraska into northern Minnesota Friday afternoon. Given the proximity of the LLJ to our area along with some weak 700-500hPa PVA associated with the shortwave, can't rule out a few light showers/sprinkles for our northern counties Friday afternoon as suggested by several of the CAMs. However, the vast majority of the region is expected to remain dry as soundings depict dry air below 10kft where the strongest forcing will occur and rather weak forcing within the saturated upper portions of the atmosphere. Current probabilities for light showers/sprinkles only sit around 10%.

As the upper level trough and attendant surface low continue eastward Saturday, the cold front associated with these features slows down and becomes quasi-stationary across Minnesota into northern Wisconsin. Moisture pools along the boundary as southerly flow continues across the region which combined with forcing along the front and stronger 700-500hPa PVA should lead to some precipitation development throughout the day Saturday. However, because the boundary largely remains to our west, most of the region is again expected to be dry with only those north and west of an Austin, MN to Wausau, WI line having 10-20% probabilities to see some light rain.

Sunday - Wednesday: Greater Precipitation Potential, Trending Cooler

Aviation

Issued at 634 PM CDT Thu Oct 22 2026

Increased off surface winds expected to limit river valley FG affecting KLSE TAF site overnight. Increased south surface winds expected through Friday, initially increasing through the morning hours primarily west of the Mississippi River Valley affecting KRST TAF site.

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.