Climate and monthly weather forecast
Oconomowoc, WI

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Weather in January

January, like December, is another subzero cold winter month in Oconomowoc, Wisconsin, with temperature in the range of an average high of 24.3°F (-4.3°C) and an average low of 12.2°F (-11°C). In Oconomowoc, the lowest average temperatures are observed in January, with a high of 24.3°F (-4.3°C) and a low of 12.2°F (-11°C). Weather in January »

Weather in February

The last month of the winter, February, is another freezing cold month in Oconomowoc, Wisconsin, with an average temperature fluctuating between 15.1°F (-9.4°C) and 27.7°F (-2.4°C). Upon the beginning of February, Oconomowoc's high-temperatures register at a still freezing cold 27.7°F (-2.4°C), closely mirroring the preceding month. Weather in February »

Weather in March

The first month of the spring, March, is a wintry month in Oconomowoc, Wisconsin, with an average temperature ranging between max 41°F (5°C) and min 27°F (-2.8°C). March's arrival coincides with a rise in the average high-temperature, moving from February's subzero cold 27.7°F (-2.4°C) to a wintry 41°F (5°C). Weather in March »

Weather in April

April is a fresh spring month in Oconomowoc, Wisconsin, with an average temperature fluctuating between 52.9°F (11.6°C) and 36.9°F (2.7°C). The shift into April is accompanied by a temperature increase, with the average high-temperature rising from a wintry 41°F (5°C) in March to a cool 52.9°F (11.6°C). Weather in April »

Weather in May

May, the last month of the spring in Oconomowoc, is a refreshing month, with an average temperature ranging between min 47.5°F (8.6°C) and max 65.1°F (18.4°C). May brings an increase in the average high-temperature, progressing from a fresh 52.9°F (11.6°C) in April to an enjoyable 65.1°F (18.4°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Oconomowoc, Wisconsin, with an average temperature ranging between min 57°F (13.9°C) and max 73.9°F (23.3°C). June's arrival signals a subtle increase in average high-temperatures, moving from May's comfortable 65.1°F (18.4°C) to a warm 73.9°F (23.3°C). Weather in June »

Weather in July

July, like June, in Oconomowoc, Wisconsin, is a moderately hot summer month, with temperature in the range of an average low of 61.7°F (16.5°C) and an average high of 78.4°F (25.8°C). In Oconomowoc, the highest average temperatures are observed in July, with a high of 78.4°F (25.8°C) and a low of 61.7°F (16.5°C). Weather in July »

Weather in August

August, the last month of the summer in Oconomowoc, is another warm month, with an average temperature varying between 59.9°F (15.5°C) and 77.4°F (25.2°C). Oconomowoc's average high-temperature in August is a still moderately hot 77.4°F (25.2°C), marking an insignificant difference from the 78.4°F (25.8°C) of July. Weather in August »

Weather in September

September, the first month of the autumn in Oconomowoc, is still a pleasant month, with an average temperature ranging between max 71.1°F (21.7°C) and min 52.7°F (11.5°C). Transitioning from August to September involves a subtle drop in average high-temperatures, descending from a moderately hot 77.4°F (25.2°C) to a pleasant 71.1°F (21.7°C). Weather in September »

Weather in October

October, the same as September, in Oconomowoc, Wisconsin, is a moderate autumn month, with an average temperature fluctuating between 41.9°F (5.5°C) and 57.6°F (14.2°C). October's arrival coincides with a drop in the average high-temperature, decreasing from September's agreeable 71.1°F (21.7°C) to a mild 57.6°F (14.2°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in Oconomowoc, Wisconsin, with an average temperature varying between 43.2°F (6.2°C) and 30.6°F (-0.8°C). November involves a decrease in temperature, down from a moderate 57.6°F (14.2°C) in October to a chilly 43.2°F (6.2°C). Weather in November »

Weather in December

December, the first month of the winter in Oconomowoc, is also a subzero cold month, with an average temperature ranging between min 20.8°F (-6.2°C) and max 30.7°F (-0.7°C). In Oconomowoc, the average high-temperature in December decreases from a frosty 43.2°F (6.2°C) in November to a freezing cold 30.7°F (-0.7°C). Weather in December »
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the coldest months in Oconomowoc?

Oconomowoc's coldest temperatures are experienced in January, with average high temperatures of 24.3°F (-4.3°C) and lows of 12.2°F (-11°C).

What is the most humid month in Oconomowoc?

The most humid month in Oconomowoc, Wisconsin, is January, with an average relative humidity of 88%.

How much does it rain in Oconomowoc?

In Oconomowoc, Wisconsin, during the entire year, the rain falls for 117.9 days and collects up to 13.82" (351mm) of precipitation.

When does it snow in Oconomowoc?

Months with snowfall in Oconomowoc are January through April, October through December.

When does it snow the most in Oconomowoc?

January is the month with the most snowfall in Oconomowoc. Snow falls for 12.8 days and accumulates 2.17" (55mm) of snow.

How much does it snow in Oconomowoc?

In Oconomowoc, during the entire year, snow falls for 47.6 days and aggregates up to 7.4" (188mm) of snow.

What is the month with the least sunshine in Oconomowoc?

January has the least sunshine of the year, with an average of 3.3h of sunshine.

When is the lowest UV index in Oconomowoc?

January, November and December, with an average maximum UV index of 1, are months with the lowest UV index.

What is the driest month in Oconomowoc?

February and December are months with the least rain in Oconomowoc when the rain falls for 3.2 days and typically aggregates up to 0.59" (15mm) of rain.

When is Daylight Saving Time (DST) in Oconomowoc?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.

What is the least humid month in Oconomowoc?

With an average relative humidity of 76%, April is the least humid month in Oconomowoc.

When it does not snow in Oconomowoc?

In Oconomowoc, snow does not fall in May through September.

When are the longest days in Oconomowoc?

With an average of 15h and 18min of daylight, June has the longest days of the year.

When is the highest UV index in Oconomowoc?

The month with the highest UV index in Oconomowoc is June, with an average maximum UV index of 6.

What are the warmest months in Oconomowoc?

The average temperatures in Oconomowoc, Wisconsin, reach their apex in July, averaging 78.4°F (25.8°C) at the high end and 61.7°F (16.5°C) at the low end.

What is the wettest month in Oconomowoc?

The month with the most rainfall is July, when the rain falls for 14.7 days and typically aggregates up to 1.85" (47mm) of precipitation.

What month has the most sunshine in Oconomowoc?

The month with the most sunshine is July, with an average of 9.9h of sunshine.

What is the month with the shortest days in Oconomowoc?

With an average of 9h and 6min of daylight, December has the shortest days of the year in Oconomowoc.

Average temperature
Oconomowoc, WI

Average temperature - Oconomowoc, WI

The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (24.3°F).

The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).

Average pressure
Oconomowoc, WI

Average pressure - Oconomowoc, WI

The months with the highest atmospheric pressure are January and February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed
Oconomowoc, WI

Average wind speed - Oconomowoc, WI

The windiest month (with the highest average wind speed) is April (10mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).

Average humidity
Oconomowoc, WI

Average humidity - Oconomowoc, WI

The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is April (76%).

Average rainfall
Oconomowoc, WI

Average rainfall - Oconomowoc, WI

The wettest month (with the highest rainfall) is July (1.85").
The driest months (with the least rainfall) are February and December (0.59").

Average rainfall days
Oconomowoc, WI

Average rainfall days - Oconomowoc, WI

The month with the highest number of rainy days is July (14.7 days).
The month with the least rainy days is January (2.8 days).

Average snowfall
Oconomowoc, WI

Average snowfall - Oconomowoc, WI

The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days
Oconomowoc, WI

Average snowfall days - Oconomowoc, WI

The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine
Oconomowoc, WI

Average daylight / Average sunshine - Oconomowoc, WI

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 18min).

Average sunshine days
Oconomowoc, WI

Average sunshine days - Oconomowoc, WI

The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (11.7 days).

Average UV index
Oconomowoc, WI

Average UV index - Oconomowoc, WI

The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).

Average cloud cover
Oconomowoc, WI

Average cloud cover - Oconomowoc, WI

The month with the most cloud cover is January (Cloud cover 65).
The months with the least cloud cover are July, August and September (Cloud cover 34).

Average visibility
Oconomowoc, WI

Average visibility - Oconomowoc, WI

The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).

Oconomowoc, Wisconsin, USA

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