Lake Onalaska, WI Weather Forecast & Current Conditions

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Lake Onalaska, WI Weather Maps

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Lake Onalaska Weather Map
UTC Time: 9/19/2026, 16:46
Your Time:
Aeronautical Observation: Automated synoptic observations via NWS Gateway.
Auto-refresh in: 5:02

Lake Onalaska, WI Regional Weather

Expires:202609191700;;716093
ASUS43 KMKX 191620
RWRWI 

WISCONSIN REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI
1100 AM CDT SAT SEP 19 2026

NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO
SIGNIFICANT WEATHER AND/OR OBSTRUCTIONS TO VISIBILITY.


WIZ032>034-041-042-053>061-191700-
SOUTHWEST WISCONSIN
  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
LA CROSSE      CLOUDY    61  59  93 E7        29.96F TC  16           
SPARTA         LGT RAIN  63  61  94 CALM      29.96  FOG     TC  17   
VIROQUA        CLOUDY    59  59 100 E8        29.98F VSB 1/4 TC  15   
BOSCOBEL       LGT RAIN  63  62  97 VRB5      29.97R TC  17           
PRAIRIE DU CHI LGT RAIN  67  67  99 E6        29.94S TC  20           
PLATTEVILLE    CLOUDY   N/A N/A N/A SE7       29.96R                  
$$


SKY/WX - Weather  TMP - Temperature  DP - Dew Point  RH - Humidity
WIND - Wind Direction/Speed PRES - Barometric Pressure VSB - Visibility
WCI - Wind Chill Index E13G22 Wind - East Wind 13 mph/Gusts of 22 mph

Lake Onalaska, WI

Afternoon
Thunderstorms
62°/ 52° 17°/ 11°
80%
Sunday
Mostly Cloudy
68°/ 48° 20°/
0%
Monday
Mostly Cloudy
65°/ 45° 18°/
0%
Tuesday
Cloudy
68°20°
0%
Wednesday
Cloudy
68°20°
0%
Thu Night
Cloudy
68°20°
0%
Friday
Sunny
72°22°
0%

Day: Showers likely early, then showers with a chance of thunderstorms this afternoon. Near steady temperature in the lower 60s. East winds 5 to 10 mph. Chance of rain 80 percent.

Night: Cloudy. A chance of showers with a slight chance of thunderstorms in the evening. Lows in the lower 50s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Caledonia, MN

Afternoon
Thunderstorms
65°/ 55° 18°/ 13°
70%
Sunday
Mostly Cloudy
68°/ 48° 20°/
0%
Monday
Mostly Cloudy
62°/ 45° 17°/
0%
Tuesday
Cloudy
65°18°
0%
Wednesday
Cloudy
65°18°
0%
Thursday
Cloudy
65°/ 48° 18°/
0%

Day: Showers likely with a slight chance of thunderstorms early, then showers likely with a chance of thunderstorms this afternoon. Some thunderstorms may produce heavy rainfall early. Some thunderstorms may produce heavy rainfall this afternoon. Near steady temperature in the mid 60s. East winds around 5 mph. Chance of rain 70 percent.

Night: Cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. Lows in the mid 50s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Winona, MN

Afternoon
Thunderstorms
62°/ 55° 17°/ 13°
70%
Sunday
Mostly Cloudy
68°/ 48° 20°/
0%
Monday
Mostly Cloudy
62°/ 45° 17°/
0%
Tuesday
Cloudy
65°18°
0%
Wednesday
Cloudy
65°18°
0%
Thursday
Cloudy
65°/ 48° 18°/
0%

Day: Showers likely. A slight chance of thunderstorms this afternoon. Near steady temperature in the lower 60s. Northeast winds 5 to 10 mph. Chance of rain 70 percent.

Night: Cloudy. A chance of showers in the evening. Lows in the mid 50s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Arcadia, WI

Afternoon
Thunderstorms
62°/ 52° 17°/ 11°
70%
Sunday
Partly Cloudy
68°/ 45° 20°/
0%
Monday
Mostly Cloudy
62°/ 42° 17°/
0%
Tuesday
Cloudy
65°18°
0%
Wednesday
Cloudy
65°18°
0%
Thu Night
Cloudy
65°18°
0%
Friday
Sunny
70°21°
0%

Day: Showers likely. A slight chance of thunderstorms this afternoon. Near steady temperature in the lower 60s. East winds 5 to 10 mph. Chance of rain 70 percent.

Night: Cloudy. A chance of showers in the evening. Lows in the lower 50s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Viroqua, WI

Afternoon
Thunderstorms
65°/ 55° 18°/ 13°
90%
Sunday
Mostly Cloudy
65°/ 48° 18°/
0%
Monday
Mostly Cloudy
65°/ 45° 18°/
0%
Tuesday
Cloudy
65°18°
0%
Wednesday
Cloudy
65°18°
0%
Thu Night
Cloudy
65°18°
0%
Friday
Sunny
72°22°
0%

Day: Showers likely with a slight chance of thunderstorms early, then showers with a chance of thunderstorms this afternoon. Some thunderstorms may produce heavy rainfall early. Some thunderstorms may produce heavy rainfall this afternoon. Highs in the mid 60s. East winds around 5 mph. Chance of rain 90 percent.

Night: Cloudy. Showers likely with a chance of thunderstorms in the evening, then a chance of showers after midnight. Lows in the mid 50s. Northeast winds 5 to 10 mph. Chance of rain 60 percent.

Alma, WI

Afternoon
Thunderstorms
62°/ 52° 17°/ 11°
70%
Sunday
Partly Cloudy
68°/ 45° 20°/
0%
Monday
Mostly Cloudy
65°/ 42° 18°/
0%
Tuesday
Cloudy
65°18°
0%
Wednesday
Cloudy
65°18°
0%
Thursday
Cloudy
65°/ 48° 18°/
0%

Day: Showers likely. A slight chance of thunderstorms this afternoon. Near steady temperature in the lower 60s. Northeast winds 5 to 10 mph. Chance of rain 70 percent.

Night: Cloudy. A slight chance of showers in the evening. Lows in the lower 50s. Northeast winds 5 to 10 mph. Chance of rain 20 percent.

Preston, MN

Afternoon
Thunderstorms
62°/ 55° 17°/ 13°
70%
Sunday
Mostly Cloudy
65°/ 48° 18°/
0%
Monday
Mostly Cloudy
62°/ 45° 17°/
0%
Tuesday
Cloudy
62°17°
0%
Wednesday
Cloudy
62°17°
0%
Thursday
Cloudy
62°/ 48° 17°/
0%

Day: Showers likely. A slight chance of thunderstorms this afternoon. Near steady temperature in the lower 60s. Northeast winds 5 to 10 mph. Chance of rain 70 percent.

Night: Cloudy. A chance of showers in the evening, then a slight chance of showers after midnight. Lows in the mid 50s. Northeast winds 10 to 15 mph. Chance of rain 50 percent.

Black River Falls, WI

Afternoon
Thunderstorms
62°/ 48° 17°/
70%
Sunday
Partly Cloudy
68°/ 42° 20°/
0%
Monday
Mostly Cloudy
65°/ 40° 18°/
0%
Tuesday
Cloudy
65°18°
0%
Wednesday
Cloudy
65°18°
0%
Thu Night
Cloudy
65°18°
0%
Friday
Sunny
72°22°
0%

Day: Showers likely. A slight chance of thunderstorms this afternoon. Near steady temperature in the lower 60s. East winds 5 to 10 mph. Chance of rain 70 percent.

Night: Cloudy. A chance of showers in the evening. Lows in the upper 40s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Sparta, WI

Afternoon
Thunderstorms
62°/ 52° 17°/ 11°
90%
Sunday
Mostly Cloudy
68°/ 45° 20°/
0%
Monday
Mostly Cloudy
65°/ 42° 18°/
0%
Tuesday
Cloudy
65°18°
0%
Wednesday
Cloudy
65°18°
0%
Thu Night
Cloudy
65°18°
0%
Friday
Sunny
72°22°
0%

Day: Showers likely with a slight chance of thunderstorms early, then showers with a chance of thunderstorms this afternoon. Near steady temperature in the lower 60s. East winds 5 to 10 mph. Chance of rain 90 percent.

Night: Cloudy. A chance of showers with a slight chance of thunderstorms in the evening, then a slight chance of showers after midnight. Lows in the lower 50s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Waukon, IA

Afternoon
Thunderstorms
68°/ 55° 20°/ 13°
90%
Sunday
Mostly Cloudy
65°/ 52° 18°/ 11°
0%
Monday
Mostly Cloudy
62°/ 45° 17°/
0%
Tuesday
Cloudy
65°18°
0%
Wednesday
Cloudy
65°18°
0%
Thursday
Cloudy
65°/ 50° 18°/ 10°
0%

Day: Showers likely with a slight chance of thunderstorms early, then showers with a chance of thunderstorms this afternoon. Some thunderstorms may produce heavy rainfall early. Some thunderstorms may produce heavy rainfall this afternoon. Near steady temperature in the upper 60s. Southeast winds around 5 mph. Chance of rain 90 percent.

Night: Cloudy. Showers likely with a chance of thunderstorms in the evening, then a chance of showers after midnight. Lows in the mid 50s. North winds 5 to 10 mph. Chance of rain 70 percent.

Decorah, IA

Afternoon
Thunderstorms
68°/ 55° 20°/ 13°
70%
Sunday
Mostly Cloudy
65°/ 50° 18°/ 10°
0%
Monday
Mostly Cloudy
62°/ 45° 17°/
0%
Tuesday
Cloudy
62°17°
0%
Wednesday
Cloudy
62°/ 48° 17°/
0%
Thursday
Cloudy
48°
0%
Friday
Cloudy
48°
0%

Day: Showers likely with a slight chance of thunderstorms early, then showers likely with a chance of thunderstorms this afternoon. Some thunderstorms may produce heavy rainfall early. Some thunderstorms may produce heavy rainfall this afternoon. Near steady temperature in the upper 60s. Light winds, becoming southwest this afternoon. Chance of rain 70 percent.

Night: A chance of thunderstorms in the evening. Cloudy with a chance of showers. Lows in the mid 50s. North winds 5 to 10 mph. Chance of rain 50 percent.

Wabasha, MN

Afternoon
Rain Showers
62°/ 52° 17°/ 11°
60%
Sunday
Mostly Cloudy
68°/ 45° 20°/
0%
Monday
Mostly Cloudy
65°/ 42° 18°/
0%
Tuesday
Sunny
65°/ 42° 18°/
0%
Wed Night
Cloudy
45°
0%
Thursday
Cloudy
70°21°
0%
Friday
Cloudy
70°21°
0%

Day: Showers likely. Near steady temperature in the lower 60s. Northeast winds 5 to 10 mph. Chance of rain 60 percent.

Night: Cloudy. Lows in the lower 50s. Northeast winds 5 to 10 mph.

Prairie Du Chien, WI

Afternoon
Thunderstorms
68°/ 58° 20°/ 14°
90%
Sunday
Rain Showers
65°/ 52° 18°/ 11°
40%
Monday
Mostly Cloudy
65°/ 45° 18°/
0%
Tuesday
Cloudy
65°18°
0%
Wednesday
Cloudy
65°18°
0%
Thu Night
Cloudy
65°18°
0%
Friday
Sunny
72°22°
0%

Day: Showers likely with a slight chance of thunderstorms early, then showers with a chance of thunderstorms this afternoon. Some thunderstorms may produce heavy rainfall early. Some thunderstorms may produce heavy rainfall this afternoon. Near steady temperature in the upper 60s. Southeast winds around 5 mph. Chance of rain 90 percent.

Night: Cloudy. Showers likely with a chance of thunderstorms in the evening, then a chance of showers after midnight. Some thunderstorms may produce heavy rainfall in the evening. Lows in the upper 50s. Northeast winds 5 to 10 mph. Chance of rain 70 percent.

Rochester, MN

Afternoon
Thunderstorms
62°/ 55° 17°/ 13°
70%
Sunday
Mostly Cloudy
68°/ 48° 20°/
0%
Monday
Mostly Cloudy
62°/ 42° 17°/
0%
Tuesday
Cloudy
62°17°
0%
Wednesday
Cloudy
62°/ 48° 17°/
0%
Thursday
Cloudy
48°
0%
Friday
Cloudy
48°
0%

Day: Showers likely. A slight chance of thunderstorms this afternoon. Near steady temperature in the lower 60s. Northeast winds 5 to 10 mph. Chance of rain 70 percent.

Night: Cloudy. A slight chance of showers in the evening. Lows in the mid 50s. Northeast winds 5 to 10 mph. Chance of rain 20 percent.

Richland Center, WI

Afternoon
Thunderstorms
68°/ 55° 20°/ 13°
90%
Sunday
Rain Showers
65°/ 48° 18°/
40%
Monday
Mostly Cloudy
62°/ 45° 17°/
0%
Tuesday
Cloudy
65°18°
0%
Wednesday
Cloudy
65°18°
0%
Thu Night
Cloudy
65°18°
0%
Friday
Sunny
72°22°
0%

Day: A chance of thunderstorms. Showers. Some thunderstorms may produce heavy rainfall. Highs in the upper 60s. Southeast winds around 5 mph. Chance of rain 90 percent.

Night: Cloudy. Showers likely with a chance of thunderstorms in the evening, then a chance of showers after midnight. Some thunderstorms may produce heavy rainfall in the evening. Lows in the mid 50s. Northeast winds 5 to 10 mph. Chance of rain 70 percent.

Cresco, IA

Afternoon
Thunderstorms
65°/ 55° 18°/ 13°
70%
Sunday
Mostly Cloudy
65°/ 48° 18°/
0%
Monday
Mostly Cloudy
62°/ 45° 17°/
0%
Tuesday
Cloudy
62°17°
0%
Wednesday
Cloudy
62°/ 48° 17°/
0%
Thursday
Cloudy
48°
0%
Friday
Cloudy
48°
0%

Day: A slight chance of thunderstorms. Showers likely early, then a chance of showers this afternoon. Some thunderstorms may produce heavy rainfall. Near steady temperature in the mid 60s. Light winds, becoming northwest this afternoon. Chance of rain 70 percent.

Night: A slight chance of thunderstorms in the evening. Cloudy with a chance of showers. Lows in the mid 50s. Northeast winds 10 to 15 mph. Chance of rain 50 percent.

Neillsville, WI

Afternoon
Rain Showers
58°/ 48° 14°/
70%
Sunday
Partly Cloudy
65°/ 42° 18°/
0%
Monday
Mostly Cloudy
62°/ 42° 17°/
0%
Tuesday
Cloudy
42°
0%
Wednesday
Cloudy
42°
0%
Thursday
Cloudy
42°
0%
Friday
Cloudy
42°
0%

Day: Showers likely. Near steady temperature in the upper 50s. East winds 5 to 10 mph. Chance of rain 70 percent.

Night: Cloudy. A chance of showers in the evening. Lows in the upper 40s. Northeast winds 5 to 10 mph. Chance of rain 40 percent.

Mauston, WI

Afternoon
Thunderstorms
62°/ 52° 17°/ 11°
70%
Sunday
Mostly Cloudy
68°/ 45° 20°/
0%
Monday
Mostly Cloudy
62°/ 42° 17°/
0%
Tuesday
Cloudy
65°18°
0%
Wednesday
Cloudy
65°18°
0%
Thu Night
Cloudy
65°18°
0%
Friday
Sunny
72°22°
0%

Day: Showers likely. A slight chance of thunderstorms early, then a chance of thunderstorms this afternoon. Near steady temperature in the lower 60s. East winds 5 to 10 mph. Chance of rain 70 percent.

Night: Cloudy. A chance of showers and thunderstorms in the evening, then a slight chance of showers after midnight. Lows in the lower 50s. Northeast winds 5 to 10 mph. Chance of rain 50 percent.

Eau Claire, WI

Today
Rain Showers
62°/ 52° 17°/ 11°
70%
Sunday
Partly Cloudy
68°/ 45° 20°/
0%
Monday
Mostly Cloudy
65°/ 40° 18°/
0%
Tuesday
Sunny
65°/ 40° 18°/
0%
Wednesday
Sunny
68°/ 42° 20°/
0%
Thursday
Sunny
68°/ 45° 20°/
0%
Friday
Sunny
72°22°
0%

Day: Cloudy. Chance of showers late in the morning, then showers likely and chance of drizzle in the afternoon. Near steady temperature in the lower 60s. East winds 5 to 10 mph. Chance of showers 70 percent.

Night: Mostly cloudy. A 20 percent chance of rain showers in the evening. Lows in the lower 50s. Northeast winds up to 10 mph.

Elkader, IA

Afternoon
Thunderstorms
72°/ 58° 22°/ 14°
90%
Sunday
Rain Showers
65°/ 52° 18°/ 11°
50%
Monday
Rain Showers
62°/ 48° 17°/
40%
Tue Night
Cloudy
45°
0%
Wednesday
Cloudy
45°
0%
Thursday
Cloudy
45°/ 52° / 11°
0%

Day: Showers likely with a slight chance of thunderstorms early, then showers with a chance of thunderstorms this afternoon. Some thunderstorms may produce heavy rainfall early. Some thunderstorms may produce heavy rainfall this afternoon. Highs in the lower 70s. South winds 5 to 10 mph. Chance of rain 90 percent.

Night: Cloudy. Showers likely with a chance of thunderstorms in the evening, then a chance of showers with a slight chance of thunderstorms after midnight. Some thunderstorms may produce heavy rainfall in the evening. Lows in the upper 50s. North winds 5 to 10 mph. Chance of rain 70 percent.

Names listed above may include county names.

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