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Lancaster, WI Weather
Current conditions
Observed at Platteville Municipal Airport · 45 min ago
Forecast
10-day-
Tonight
Clear. Low around 41, with temperatures rising to around 43 overnight. Southeast wind around 3 mph.
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Wednesday
Sunny, with a high near 71. South wind around 6 mph.
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Wednesday Night
Patchy fog after 1am. Mostly clear. Low around 48, with temperatures rising to around 50 overnight. West wind around 1 mph.
National Weather Service forecast updated 1 hr ago.
Hourly
Hourly forecast- Now48°
- 1 AM46°
- 2 AM45°
- 3 AM45°
- 4 AM44°
- 5 AM43°
- 6 AM42°
- 7 AM41°
- 8 AM43°
- 9 AM47°
- 10 AM53°
- 11 AM58°
- 12 PM62°
- 1 PM66°
- 2 PM68°
- 3 PM70°
- 4 PM71°
- 5 PM70°
- 6 PM67°
- 7 PM64°
- 8 PM59°
- 9 PM58°
- 10 PM57°
- 11 PM56°
10-day forecast
Details- TonightOct 20Clear41°
- TodayOct 21Sunny48°71°
- ThuOct 22Patchy Fog then Sunny49°73°
- FriOct 23Sunny52°72°
- SatOct 24Partly Sunny53°72°
- SunOct 25Partly Sunny13%47°66°
- MonOct 26Chance Rain Showers29%42°59°
- TueOct 27Slight Chance Rain Showers22%56°
- WedOct 28Sunny32°50°
- ThuOct 29Mostly 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 mapWeather news in Wisconsin
More weather news-
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Southeastern Wisconsin Weather - A Very Pleasant Week AheadTMJ4 News Today will be slightly warmer than yesterday, but also a little breezy with gusts up to 30 mph Highs will be in the lower 60s, leading to feels like temperatures very similar to yesterday afternoon.Considering…
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Air quality
Air quality is satisfactory, and air pollution poses little or no risk.
Forecast
- WedModerate
- ThuModerate
- FriModerate
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
Almanac
MonthlyLancaster 4 Wsw, records since 1893. Normals 1991–2020. Data from NOAA's Regional Climate Centers (ACIS).
Nearby
- Dubuque 39 km
- Platteville 23 km
- Prairie du Chien 42 km
- Asbury 37 km
- Dodgeville 49 km
- Dyersville 53 km
- Galena 53 km
- Boscobel 32 km
- Mineral Point 43 km
- Fennimore 16 km
- Darlington 52 km
- Cuba City 35 km
Forecasters' discussion
From the National Weather Service office in ARX, issued 17 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 600 AM CDT Tue Oct 20 2026
Valley fog has developed overnight and is currently impacting ONA/PDC/OVS with issues seen on all side of LSE but seemingly not within 5 nautical miles. In any case, still prudent to carry a TEMPO at LSE given how close the issues are to impacting the terminal. Once the fog dissipates around 14-15z, VFR conditions will return. Fog may develop once again Wednesday morning primarily impacting the Wisconsin River valley and OVS while low level winds may be too strong for this to impact LSE once again so have kept it out of the TAF near the end of the period.
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.