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Average Weather in Wausau Wisconsin, United States

In Wausau, the temperature typically varies from 8°F to 80°F over the course of the year, and is rarely below -12°F or above 89°F.

The warm season lasts for 3.9 months, from May 19 to September 17, with an average daily high temperature above 69°F. The hottest day of the year is July 19, with an average high of 80°F and low of 61°F.

The cold season lasts for 3.3 months, from November 27 to March 5, with an average daily high temperature below 35°F. The coldest day of the year is January 28, with an average low of 8°F and high of 24°F.

Average High and Low Temperature

The daily average high (red line) and low (blue line) temperature with percentile bands, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature

12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecfrigidfrigidfreezingfreezingchillychillycoldcoldcoolcoolcomfortablecomfortablewarmwarm
The average hourly temperature, color coded into bands: frigid < 15°F < freezing < 32°F < chilly < 45°F < cold < 55°F < cool < 65°F < comfortable < 75°F < warm < 85°F < hot < 95°F < sweltering. The shaded overlays indicate night and civil twilight.

Sun

The length of the day in Wausau varies significantly over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 46 minutes of daylight; the longest day is June 21, with 15 hours, 37 minutes of daylight.

Hours of Daylight and Twilight

The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 5:11 AM on June 15, and the latest sunrise is 2 hours, 30 minutes later at 7:41 AM on November 4. The earliest sunset is at 4:16 PM on December 9, and the latest sunset is 4 hours, 32 minutes later at 8:49 PM on June 25.

Daylight saving time (DST) is observed in Wausau during 2017, starting in the spring on March 12, lasting 7.8 months, and ending in the fall on November 5.

Sunrise & Sunset with Twilight and Daylight Saving Time

The solar day over the course of the year 2017. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Clouds

In Wausau, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in Wausau begins around May 28 and lasts for 4.6 months, ending around October 15. On July 28, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 69% of the time, and overcast or mostly cloudy 31% of the time.

The cloudier part of the year begins around October 15 and lasts for 7.4 months, ending around May 28. On December 29, the cloudiest day of the year, the sky is overcast or mostly cloudy 63% of the time, and clear, mostly clear, or partly cloudy 37% of the time.

Cloud Cover

clearerclearercloudiercloudiercloudiercloudier0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecDec 2963%Dec 2963%Jul 2831%Jul 2831%May 2847%May 2847%Oct 1547%Oct 1547%overcastovercastpartly cloudypartly cloudymostly clearmostly clearclearclear
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds: clear < 20% < mostly clear < 40% < partly cloudy < 60% < mostly cloudy < 80% < overcast.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Wausau varies significantly throughout the year.

The wetter season lasts 6.1 months, from April 6 to October 9, with a greater than 26% chance of a given day being a wet day. The chance of a wet day peaks at 41% on June 13.

The drier season lasts 5.9 months, from October 9 to April 6. The smallest chance of a wet day is 10% on February 4.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation in Wausau changes throughout the year.

Rain alone is the most common for 8.8 months, from March 12 to December 4. The highest chance of a day with rain alone is 41% on June 13.

Snow alone is the most common for 3.2 months, from December 4 to March 12. The highest chance of a day with snow alone is 9% on December 17.

Daily Chance of Precipitation

snowsnowrainrainsnowsnow0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJun 1341%Jun 1341%Feb 410%Feb 410%Mar 1217%Mar 1217%Dec 415%Dec 415%Oct 926%Oct 926%mixedmixedrainrainsnowsnow
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day in the year. Wausau experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.4 months, from March 3 to December 16, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around June 15, with an average total accumulation of 3.9 inches.

The rainless period of the year lasts for 2.6 months, from December 16 to March 3. The least rain falls around January 25, with and average total accumulation of 0.2 inches.

Average Monthly Rainfall

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Snowfall

We report snowfall in liquid-equivalent terms. The actual depth of new snowfall is typically between 5 and 10 times the liquid-equivalent amount, assuming the ground is frozen. Colder, drier snow tends to be on the higher end of that range and warmer, wetter snow on the lower end.

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day in the year. Wausau experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 5.7 months, from November 3 to April 24, with a sliding 31-day liquid-equivalent snowfall of at least 0.1 inches. The most snow falls during the 31 days centered around December 21, with an average total liquid-equivalent accumulation of 0.6 inches.

The snowless period of the year lasts for 6.3 months, from April 24 to November 3. The least snow falls around July 26, with an average total liquid-equivalent accumulation of 0.0 inches.

Average Liquid-Equivalent Monthly Snowfall

The average liquid-equivalent snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.

Humidity

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

Wausau experiences some seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.2 months, from June 9 to September 15, during which time the comfort level is muggy, oppressive, or miserable at least 6% of the time. The muggiest day of the year is July 23, with muggy conditions 22% of the time.

The least muggy day of the year is December 3, when muggy conditions are essentially unheard of.

Humidity Comfort Levels

muggymuggy0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecDec 30%Dec 30%Jul 2322%Jul 2322%Jun 96%Jun 96%Sep 156%Sep 156%oppressiveoppressivemuggymuggycomfortablecomfortabledrydry
The percentage of time spent at various humidity comfort levels, categorized by dew point: dry < 55°F < comfortable < 60°F < humid < 65°F < muggy < 70°F < oppressive < 75°F < miserable.

Wind

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Wausau experiences mildly seasonal variation over the course of the year.

The windier part of the year lasts for 7.8 months, from September 26 to May 21, with average wind speeds of more than 5.5 miles per hour. The windiest day of the year is April 2, with an average hourly wind speed of 6.6 miles per hour.

The calmer time of year lasts for 4.2 months, from May 21 to September 26. The calmest day of the year is August 3, with an average hourly wind speed of 4.4 miles per hour.

Average Wind Speed

The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Wausau varies throughout the year.

The wind is most often from the north for 1.7 months, from February 28 to April 20, with a peak percentage of 32% on March 8. The wind is most often from the south for 3.6 weeks, from May 12 to June 6 and for 3.6 weeks, from August 26 to September 20, with a peak percentage of 34% on September 6. The wind is most often from the west for 2.6 months, from June 6 to August 26 and for 5.3 months, from September 20 to February 28, with a peak percentage of 42% on December 13.

Wind Direction

WWNNEESSWWSSWW0%20%40%60%80%100%JanFebMarAprMayJunJulAugSepOctNovDecwestwestsouthsoutheasteastnorthnorth
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions (north, east, south, and west), excluding hours in which the mean wind speed is less than 1 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Solar Energy

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences very significant seasonal variation over the course of the year.

The brighter period of the year lasts for 3.5 months, from May 5 to August 22, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest day of the year is July 1, with an average of 7.0 kWh.

The darker period of the year lasts for 3.4 months, from October 27 to February 11, with an average daily incident shortwave energy per square meter below 2.6 kWh. The darkest day of the year is December 16, with an average of 1.4 kWh.

Average Daily Incident Shortwave Solar Energy

The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Wausau are 44.959 deg latitude, -89.630 deg longitude, and 1,217 ft elevation (map ).

The topography within 2 miles of Wausau contains only modest variations in elevation, with a maximum elevation change of 302 feet, and an average elevation above sea level of 1,240 feet. Within 10 miles contains significant variations in elevation (778 feet). Within 50 miles contains very significant variations in elevation (1,152 feet).

The area within 2 miles of Wausau is covered by artificial surfaces (67%), water (14%), and cropland (12%), within 10 miles by trees (44%) and cropland (40%), and within 50 miles by trees (49%) and cropland (35%).

Data Sources

This report illustrates the typical weather in Wausau, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Wausau.

For each station, the records are corrected for the elevation difference between that station and Wausau according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Wausau is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Wausau and a given station.

The stations contributing to this reconstruction are: Wausau Municipal Airport (94%, 3.4 kilometers, south), Merrill, Merrill Municipal Airport (4.1%, 27 kilometers, north), and Langlade County Airport (1.8%, 46 kilometers, northeast).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Tables of the Sun, Moon and Planets , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for aiports and weather stations are provided by AskGeo.com .