The best times to visit Oconomowoc for ideal weather are

May 21st to September 30th

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.



Other Oconomowoc Travel Info

Weather in Oconomowoc


Average temperatures in Oconomowoc vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a very low chance of rain or snow throughout the year. The area is somewhat temperate — in the 58th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Oconomowoc, the hottest months are July, August, and then June. See average monthly temperatures below. The warmest time of year is generally mid July where highs are regularly around 81.1°F (27.3°C) with temperatures rarely dropping below 62.8°F (17.1°C) at night.

Oconomowoc Temperatures (Fahrenheit)


Oconomowoc Temperatures (Celsius)


“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Oconomowoc Perceived Temperature (F)


Oconomowoc Perceived Temperature (C)



Average Oconomowoc Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 26.8 19.3 12.7
Feb 27.2 20 13.5
Mar 42.9 33.7 26.1
Apr 54.4 44.4 36.2
May 67.7 56.8 47.2
Jun 75.8 65.7 56.5
Jul 80.1 70.4 60.9
Aug 78.5 68.8 60.2
Sep 71.5 61.3 52.5
Oct 59.1 50 42.3
Nov 45.7 37.5 30.6
Dec 32.1 25.7 19.6

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan -2.9 -7.1 -10.7
Feb -2.7 -6.7 -10.3
Mar 6.1 0.9 -3.3
Apr 12.4 6.9 2.3
May 19.8 13.8 8.4
Jun 24.3 18.7 13.6
Jul 26.7 21.3 16.1
Aug 25.8 20.4 15.7
Sep 21.9 16.3 11.4
Oct 15.1 10 5.7
Nov 7.6 3.1 -0.8
Dec 0.1 -3.5 -6.9



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Oconomowoc are January, July, and then August. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early January. For example, on the week of January 1st there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late April with an average of 0 days of significant precipitation the week of April 23rd.

When can you find snow in Oconomowoc? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Oconomowoc.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Oconomowoc (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 0% 0 0
Feb 2% 0 0.1
Mar 1% 0 0.1
Apr 3% 0 0.2
May 2% 0 0.3
Jun 2% 0 0.5
Jul 1% 0 0.2
Aug 1% 0 0.1
Sep 2% 0 0.2
Oct 2% 0 0.2
Nov 2% 0 0.1
Dec 2% 0 0.1

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 0 0 0
Feb 2 0 0.3
Mar 1 0 0.3
Apr 3 0 0.5
May 2 0 0.8
Jun 2 0 1.3
Jul 1 0 0.5
Aug 1 0 0.3
Sep 2 0 0.5
Oct 2 0 0.5
Nov 2 0 0.3
Dec 2 0 0.3


Humidity and Wind

Oconomowoc has some very humid months, with other comfortably humid months. The least humid month is May (55% relative humidity), and the most humid month is December (74.2%).

Wind in Oconomowoc is usually calm. The windiest month is April, followed by January and February. April’s average wind speed of around 8.3 knots (9.5 MPH or 15.3 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid April where average top sustained speeds reach 15.5 knots, which is considered a moderate breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Oconomowoc.

Avg. Relative Humidity


The graph below shows wind speed (max and average) in knots.

Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 8.1 Gentle breeze 14.3 Significant breeze
Feb 7.8 Gentle breeze 13.8 Significant breeze
Mar 7.4 Gentle breeze 13.7 Significant breeze
Apr 8.3 Gentle breeze 15.1 Significant breeze
May 7 Gentle breeze 13.8 Significant breeze
Jun 5.8 Light breeze 12.6 Significant breeze
Jul 5.5 Light breeze 11.7 Significant breeze
Aug 4.9 Light breeze 11.1 Significant breeze
Sep 5.3 Light breeze 11.7 Significant breeze
Oct 6.7 Light breeze 13.2 Significant breeze
Nov 7.6 Gentle breeze 13.8 Significant breeze
Dec 7.4 Gentle breeze 13.5 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 66.4%
Feb 64.1%
Mar 59.6%
Apr 55.5%
May 55%
Jun 60.8%
Jul 60.4%
Aug 64.9%
Sep 66%
Oct 64.4%
Nov 64.2%
Dec 74.2%


Is it Safe to Travel to Oconomowoc?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for the United States; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Dec 04, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Oconomowoc, WI, US is July, followed by June and May. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Oconomowoc in November. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is somewhat extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 38.2 in November means 38.2% of the tourists vs. July.



Overall Oconomowoc Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 73.1°F (22.8°C) and 29.7°F (-1.3°C) with far warmer temperatures in the later months. Rain is extremely rare with 0 to 1 days of significant precipitation per month. Spring is the second busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see moderate precipitation with 0 to 1 days of precipitation per month. June – August is the busiest season for tourism in Oconomowoc, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 75°F (23.9°C) and 37.6°F (3.1°C), which will feel chilly given the humidity and wind. It rains or snows a barely noticeable amount: 0 to 1 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is far too cold this time of year in Oconomowoc to be enjoyable for warm weather travelers. The average high during this season is between 32.6°F (0.3°C) and 24.4°F (-4.2°C). On average, it rains or snows a insignificant amount: consistently 0 times per month. These times of year are fairly slow with tourists.


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