Sparta, WI Weather Forecast
Local 7-day forecast
Patchy Fog
Track current conditions, temperature changes, wind, and the full daily outlook for Sparta, WI in one place.
Patchy fog before 5am, then patchy fog and isolated showers and thunderstorms. Partly cloudy. Low around 68, with temperatures rising to around 70 overnight. Northwest wind around 1 mph. Chance of precipitation is 20%.
Local Weather Overview
This forecast page for Sparta, WI is designed for quick trip planning, giving you a clean read on daytime highs, overnight lows, and changing conditions across the upcoming forecast window. Latest sync: Jul 17, 2026 6:52 AM CDT.
The active forecast window currently covers Jul 17 to Jul 23, 2026 for Sparta, WI.
Page Snapshot
- Page focus
- city weather
- Forecast window
- Jul 17 to Jul 23, 2026
- Latest sync
- Jul 17, 2026 6:52 AM CDT
- Forecast office
- ARX
- Source
- NOAA / NWS
Daily Outlook
This Week in Sparta
Friday looks like the warmest upcoming period in Sparta at 91 degrees F.
Wednesday Night is the coolest period ahead with temperatures near 55 degrees F.
The strongest winds are forecast for Tuesday at about 6 to 16 mph NW.
Precipitation is mentioned in 4 upcoming forecast periods.
Forecast Details
- Last updated
- Jul 17, 2026 6:52 AM CDT
- Coverage
- 7 days
- Time zone
- America/Chicago
- Forecast office
- ARX
- Radar station
- KARX
Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.
Open NOAA sourceExtended Forecast
Patchy fog before 8am. Sunny, with a high near 91. Heat index values as high as 97. Southwest wind 1 to 6 mph.
Partly cloudy, with a low around 72. Heat index values as high as 96. Southwest wind around 5 mph.
Sunny, with a high near 87. Northwest wind 3 to 7 mph.
Mostly clear, with a low around 61. Northeast wind 0 to 5 mph.
Sunny, with a high near 87. South wind around 2 mph.
A chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 66. South wind 1 to 6 mph. Chance of precipitation is 50%.
Showers and thunderstorms likely before 1pm, then a slight chance of showers and thunderstorms. Mostly sunny, with a high near 90. Southwest wind 6 to 12 mph, with gusts as high as 21 mph. Chance of precipitation is 60%.
A chance of showers and thunderstorms before 1am. Mostly clear, with a low around 65. West wind 3 to 9 mph, with gusts as high as 21 mph. Chance of precipitation is 40%.
Sunny, with a high near 81. Northwest wind 6 to 16 mph, with gusts as high as 24 mph.
Mostly clear, with a low around 56. North wind 0 to 10 mph, with gusts as high as 21 mph.
Sunny, with a high near 79. Northwest wind 0 to 5 mph.
Mostly clear, with a low around 55. Northwest wind around 2 mph.
Sunny, with a high near 81. Southwest wind around 2 mph.
Detailed Forecast
| Period | Conditions | Temp | Wind |
|---|---|---|---|
|
Overnight
Jul 17
|
Patchy Fog
|
68°F |
1 mph
NW
|
|
Friday
Jul 17
|
Patchy Fog then Sunny
|
91°F |
1 to 6 mph
SW
|
|
Friday Night
Jul 17
|
Partly Cloudy
|
72°F |
5 mph
SW
|
|
Saturday
Jul 18
|
Sunny
|
87°F |
3 to 7 mph
NW
|
|
Saturday Night
Jul 18
|
Mostly Clear
|
61°F |
0 to 5 mph
NE
|
|
Sunday
Jul 19
|
Sunny
|
87°F |
2 mph
S
|
|
Sunday Night
Jul 19
|
Partly Cloudy then Chance Showers And Thunderstorms
|
66°F |
1 to 6 mph
S
|
|
Monday
Jul 20
|
Showers And Thunderstorms Likely
|
90°F |
6 to 12 mph
SW
|
|
Monday Night
Jul 20
|
Chance Showers And Thunderstorms
|
65°F |
3 to 9 mph
W
|
|
Tuesday
Jul 21
|
Sunny
|
81°F |
6 to 16 mph
NW
|
|
Tuesday Night
Jul 21
|
Mostly Clear
|
56°F |
0 to 10 mph
N
|
|
Wednesday
Jul 22
|
Sunny
|
79°F |
0 to 5 mph
NW
|
|
Wednesday Night
Jul 22
|
Mostly Clear
|
55°F |
2 mph
NW
|
|
Thursday
Jul 23
|
Sunny
|
81°F |
2 mph
SW
|
Nearby Forecasts
Explore weather pages for nearby cities and major places around Sparta.
