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Weather Conditions for Lannon, Wisconsin : Waukesha County
Issued: 8:52 am CDT Sep 13, 2026 Latitude: 43.1461195 Longitude: -88.1662028 View on Google Maps

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Today Tonight Monday Tuesday Wednesday Thursday Friday Saturday
40% chance of rain on Today Mostly Clear on Tonight Increasing Clouds on Monday 60% chance of thunderstorms on Tuesday 40% chance of rain on Wednesday 50% chance of thunderstorms on Thursday 50% chance of thunderstorms on Friday 30% chance of  on Saturday
High: 65°F Low: 47°F High: 69°F High: 77°F High: 69°F High: 73°F High: 71°F High: 71°F
Low: 62°F Low: 55°F Low: 59°F Low: 58°F Low: 56°F  
Rain Mostly Clear Increasing Clouds Thunderstorms Rain Thunderstorms Thunderstorms Partly Sunny
Current Conditions at
WEST BEND - (KETB)
59°
Clear
as of 8:35 AM CDST
Rel. Humidity: 72%
Dew Point: 50°F
Visibility: 10 Miles
Pressure: 30.08 in.
Flight Rule: VFR
Wind Data
Calm
Cloud Level(s): Clear
Current Conditions at
JUNEAU - (KUNU)
57°
Clear
as of 8:35 AM CDST
Rel. Humidity: 82%
Dew Point: 52°F
Visibility: 10 Miles
Pressure: 30.10 in.
Flight Rule: VFR
Wind Data
5 MPH
340° North
Cloud Level(s): Clear
40% chance of rain Today Today... A 40 percent chance of showers, mainly before 3pm. Increasing clouds, with a high near 65. Northeast wind 5 to 10 mph becoming west in the afternoon.

Mostly Clear on Tonight Tonight... Mostly clear, with a low around 47. West wind around 5 mph becoming calm in the evening.

Increasing Clouds on Monday Monday... Increasing clouds, with a high near 69. Light and variable wind becoming southeast 10 to 15 mph in the morning.

80% chance of thunderstorms Monday Night Monday Night... Showers and possibly a thunderstorm after 1am. Low around 62. Southeast wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

60% chance of thunderstorms Tuesday Tuesday... Showers likely and possibly a thunderstorm before 7am, then showers likely between 7am and 1pm. Mostly cloudy, with a high near 77. Southwest wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

Mostly Cloudy on Tuesday Night Tuesday Night... Mostly cloudy, with a low around 55. Northwest wind around 5 mph becoming calm in the evening.

40% chance of rain Wednesday Wednesday... A 40 percent chance of showers, mainly after 1pm. Mostly cloudy, with a high near 69. East wind 5 to 10 mph.

70% chance of thunderstorms Wednesday Night Wednesday Night... A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Cloudy, with a low around 59. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

50% chance of thunderstorms Thursday Thursday... A chance of showers and thunderstorms. Mostly cloudy, with a high near 73. Chance of precipitation is 50%.

40% chance of thunderstorms Thursday Night Thursday Night... A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Chance of precipitation is 40%.

50% chance of thunderstorms Friday Friday... A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 71.

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

30% chance of  Saturday Saturday... A 30 percent chance of showers. Partly sunny, with a high near 71.

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

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Sun Almanac for Lannon, Wisconsin
Astronomical Sunrise 04:53 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 05:28 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 06:02 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 06:30 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 37 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 7:07 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 7:35 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 8:09 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 8:44 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 33 Minutes
Nautical Rise to Set: 14 Hours 41 Minutes
Astro Rise to Set: 15 Hours 51 Minutes

Click for yearly Sun Almanac for Lannon
Moon Almanac for Lannon, Wisconsin
Moon Phase: Waxing Crescent
Moon Illumination: 7%
Moon Age: 2.50 Days
Moon is currently below the horizon
Distance from Moon to Earth: 243,017 miles
Upcoming Lunar Events for
Lannon:
Next EventEvent TimeIllum

Moonrise:09:21 am Sun6.7%
High Moon:02:44 pm Sun7.9%
Moonset:07:57 pm Sun9.1%
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