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Weather Conditions for Sylvan Mounds, Wisconsin : Jefferson County
Issued: 8:36 am CDT Sep 14, 2026 Latitude: 42.9991684 Longitude: -88.978443 View on Google Maps

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Today Tonight Tuesday Wednesday Thursday Friday Saturday Sunday
10% chance of rain on Today 90% chance of thunderstorms on Tonight 80% chance of thunderstorms on Tuesday 50% chance of thunderstorms on Wednesday 40% chance of rain on Thursday 50% chance of  on Friday 70% chance of thunderstorms on Saturday 30% chance of thunderstorms on Sunday
High: 72°F Low: 63°F High: 76°F High: 69°F High: 74°F High: 76°F High: 74°F High: 73°F
Low: 54°F Low: 61°F Low: 58°F Low: 60°F Low: 56°F  
Rain Thunderstorms Thunderstorms Thunderstorms Rain Partly Sunny Thunderstorms Thunderstorms
Current Conditions at
WATERTOWN - (KRYV)
57°
Clear
as of 8:55 AM CDST
Rel. Humidity: 82%
Dew Point: 52°F
Visibility: 10 Miles
Pressure: 30.26 in.
Flight Rule: VFR
Wind Data
6 MPH
070° East
Cloud Level(s): Clear
Current Conditions at
MADISON - (KMSN)
57°
Mostly Cloudy
as of 8:53 AM CDST
Rel. Humidity: 82%
Dew Point: 52°F
Visibility: 10 Miles
Pressure: 30.25 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Broken at 25000ft
Current Conditions at
JANESVILLE - (KJVL)
57°
Mostly Clear
as of 8:45 AM CDST
Rel. Humidity: 82%
Dew Point: 52°F
Visibility: 10 Miles
Pressure: 30.26 in.
Flight Rule: VFR
Wind Data
6 MPH
080° East
Cloud Level(s): Few at 10000ft
Current Conditions at
JUNEAU - (KUNU)
57°
Clear
as of 8:55 AM CDST
Rel. Humidity: 76%
Dew Point: 50°F
Visibility: 10 Miles
Pressure: 30.29 in.
Flight Rule: VFR
Wind Data
3 MPH
090° East
Cloud Level(s): Clear
10% chance of rain Today Today... A 10 percent chance of showers after 5pm. Increasing clouds, with a high near 72. South wind 5 to 15 mph.

90% chance of thunderstorms Tonight Tonight... A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 2am. Low around 63. Breezy, with a southeast wind 15 to 20 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

80% chance of thunderstorms Tuesday Tuesday... Showers and possibly a thunderstorm before noon, then a slight chance of showers between noon and 1pm. High near 76. Southwest wind 10 to 15 mph becoming west in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 54. Northwest wind around 5 mph becoming calm in the evening.

50% chance of thunderstorms Wednesday Wednesday... A chance of showers, with thunderstorms also possible after 4pm. Mostly cloudy, with a high near 69. East wind 5 to 10 mph. Chance of precipitation is 50%.

80% chance of thunderstorms Wednesday Night Wednesday Night... Showers and possibly a thunderstorm. Low around 61. East wind 5 to 10 mph becoming light in the evening. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

40% chance of rain Thursday Thursday... A 40 percent chance of showers before 1pm. Mostly cloudy, with a high near 74. Northeast wind around 5 mph.

30% chance of rain Thursday Night Thursday Night... A 30 percent chance of showers after 1am. Mostly cloudy, with a low around 58. Northeast wind around 5 mph becoming calm in the evening.

50% chance of  Friday Friday... A 50 percent chance of showers. Partly sunny, with a high near 76.

70% chance of rain Friday Night Friday Night... Showers likely, mainly after 1am. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.

70% chance of thunderstorms Saturday Saturday... Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 74. Chance of precipitation is 70%.

40% chance of thunderstorms Saturday Night Saturday Night... A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 56.

30% chance of thunderstorms Sunday Sunday... A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 73.

Wisconsin's Warnings, Watches, and AdvisoriesWisconsin's Watches, Warnings, and Advisories

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Sun Almanac for Sylvan Mounds, Wisconsin
Astronomical Sunrise 04:58 AM?Astronomical sunrise occurs when the Sun is 18° below the horizon and the sky begins to brighten from a completly darkened state.
Nautical Sunrise 05:33 AM?Nautical sunrise (or nautical dawn) is the precise moment when the sun's center is 12° below the horizon in the morning. It marks the beginning of nautical twilight, allowing pilots/mariners to see the horizon.
Civil Sunrise 06:06 AM?Civil sunrise is the moment in the morning when the sun's center is 6° below the horizon. It marks the start of morning civil twilight, providing enough natural light for most, outdoor activities without artificial lighting. It typically occurs roughly 20-30 minutes before actual sunrise.
Sunrise 06:35 AM?Sunrise (or sunup) is the moment when the upper rim of the Sun appears on the horizon in the morning. It marks the end of the twilight phase, often accompanied by distinct atmospheric colors.

Daylight: 12 Hours 33 Minutes?Daylight hours are the period of time between local sunrise and sunset, representing the daily portion of sunlight. These hours change in length based on season, Earth's tilt, and latitude.

Sunset 7:08 PM?The sunset is defined in astronomy as the moment the upper limb of the Sun disappears below the horizon. It marks the end of daylight and is often accompanied by distinct atmospheric colors. It also signals the beginning of twilight.
Civil Sunset 7:36 PM?Civil sunset (or evening civil twilight) occurs when the center of the sun is 6° below the horizon, marking the end of the brightest twilight phase. It typically occurs roughly 20-30 minutes after sunset, providing enough light for most outdoor activities to continue without artificial light.
Nautical Sunset 8:10 PM?Nautical sunset occurs when the sun's center is 12° below the horizon, marking the end of nautical twilight. This phase, following civil twilight, allows the horizon to remain visible, enabling mariners to take accurate star sights for navigation. The sky is dark, but some ambient light remains
Astronomical Sunset 8:45 PM?Astronomical sunrise occurs when the Sun drops to 18° below the horizon. This causes the sky to enter a completly darkened state.

Civil Rise to Set: 13 Hours 30 Minutes
Nautical Rise to Set: 14 Hours 37 Minutes
Astro Rise to Set: 15 Hours 47 Minutes

Click for yearly Sun Almanac for Sylvan Mounds
Moon Almanac for Sylvan Mounds, Wisconsin
Moon Phase: Waxing Crescent
Moon Illumination: 13%
Moon Age: 3.48 Days
Moon is currently below the horizon
Distance from Moon to Earth: 245,752 miles
Upcoming Lunar Events for
Sylvan Mounds:
Next EventEvent TimeIllum

Moonrise:10:34 am Mon13.0%
High Moon:03:34 pm Mon14.5%
Moonset:08:26 pm Mon16.0%
New Moon: Thu Sep 10
First Quarter: Fri Sep 18
Full Moon: Sat Sep 26
Last Quarter: Sat Oct 3
New Moon: Sat Oct 10
Click for Monthly Moon Almanac