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Average Weather in Owatonna Minnesota, United States

In Owatonna, the summers are long, warm, and wet; the winters are freezing, snowy, and windy; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 8°F to 82°F and is rarely below -13°F or above 90°F.

The warm season lasts for 4.1 months, from May 17 to September 21, with an average daily high temperature above 70°F. The hottest day of the year is July 18, with an average high of 82°F and low of 63°F.

The cold season lasts for 3.3 months, from November 27 to March 5, with an average daily high temperature below 36°F. The coldest day of the year is January 21, 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 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

Average Hourly Temperature in Owatonna12 AM4 AM8 AM12 PM4 PM8 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecfrigidfreezingchillycoldcoolcomfortablewarm
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.

Clouds

In Owatonna, 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 Owatonna begins around June 8 and lasts for 4.5 months, ending around October 22. On July 27, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 71% of the time, and overcast or mostly cloudy 29% of the time.

The cloudier part of the year begins around October 22 and lasts for 7.5 months, ending around June 8. On February 6, the cloudiest day of the year, the sky is overcast or mostly cloudy 61% of the time, and clear, mostly clear, or partly cloudy 39% of the time.

Cloud Cover

Cloud Cover in Owatonnaclearercloudiercloudier0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecFeb 661%Feb 661%Jul 2729%Jul 2729%Jun 845%Jun 845%Oct 2245%Oct 2245%overcastpartly cloudymostly clearclear
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 Owatonna varies significantly throughout the year.

The wetter season lasts 5.8 months, from April 7 to September 30, with a greater than 25% chance of a given day being a wet day. The chance of a wet day peaks at 42% on June 13.

The drier season lasts 6.2 months, from September 30 to April 7. The smallest chance of a wet day is 8% on February 2.

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 Owatonna changes throughout the year.

Rain alone is the most common for 9.0 months, from March 3 to December 3. The highest chance of a day with rain alone is 42% on June 13.

Snow alone is the most common for 3.0 months, from December 3 to March 3. The highest chance of a day with snow alone is 7% on January 19.

Daily Chance of Precipitation

Daily Chance of Precipitation in Owatonnasnowrainsnow0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecJun 1342%Jun 1342%Feb 28%Feb 28%Mar 313%Mar 313%Dec 314%Dec 314%Apr 726%Apr 726%Sep 3025%Sep 3025%rainsnowmixed
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 of the year. Owatonna experiences extreme seasonal variation in monthly rainfall.

The rainy period of the year lasts for 9.2 months, from March 2 to December 8, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around June 18, with an average total accumulation of 4.1 inches.

The rainless period of the year lasts for 2.8 months, from December 8 to March 2. The least rain falls around January 25, with and average total accumulation of 0.1 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 of the year. Owatonna experiences some seasonal variation in monthly liquid-equivalent snowfall.

The snowy period of the year lasts for 5.4 months, from October 28 to April 9, 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 11, with an average total liquid-equivalent accumulation of 0.5 inches.

The snowless period of the year lasts for 6.6 months, from April 9 to October 28. 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.

Sun

The length of the day in Owatonna varies significantly over the course of the year. In 2017, the shortest day is December 21, with 8 hours, 53 minutes of daylight; the longest day is June 21, with 15 hours, 30 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 5:29 AM on June 15, and the latest sunrise is 2 hours, 25 minutes later at 7:53 AM on November 4. The earliest sunset is at 4:34 PM on December 9, and the latest sunset is 4 hours, 26 minutes later at 9:00 PM on June 26.

Daylight saving time (DST) is observed in Owatonna 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

Sunrise & Sunset with Twilight and Daylight Saving Time in Owatonna12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJanFebMarAprMayJunJulAugSepOctNovDecJun 155:29 AMJun 155:29 AM9:00 PMJun 269:00 PMJun 26Dec 94:34 PMDec 94:34 PM7:53 AMNov 47:53 AMNov 4Mar 12DSTMar 12DSTDSTNov 5DSTNov 5daynightnightnightnight
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.

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.

Owatonna experiences significant seasonal variation in the perceived humidity.

The muggier period of the year lasts for 3.2 months, from June 9 to September 16, during which time the comfort level is muggy, oppressive, or miserable at least 10% of the time. The muggiest day of the year is July 21, with muggy conditions 40% of the time.

The least muggy day of the year is December 10, when muggy conditions are essentially unheard of.

Humidity Comfort Levels

Humidity Comfort Levels in Owatonnamuggy0%10%20%30%40%50%60%70%80%90%100%JanFebMarAprMayJunJulAugSepOctNovDecDec 100%Dec 100%Jul 2140%Jul 2140%Jun 910%Jun 910%Sep 1610%Sep 1610%oppressiveoppressivemuggymuggyhumidhumidcomfortablecomfortabledrydry
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 Owatonna experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 8.2 months, from September 21 to May 27, with average wind speeds of more than 5.8 miles per hour. The windiest day of the year is March 23, with an average hourly wind speed of 7.0 miles per hour.

The calmer time of year lasts for 3.8 months, from May 27 to September 21. The calmest day of the year is August 3, with an average hourly wind speed of 4.6 miles per hour.

Average Wind Speed

Average Wind Speed in Owatonnawindywindy0 mph1 mph2 mph3 mph4 mph5 mph6 mph7 mph8 mph9 mph10 mph11 mphJanFebMarAprMayJunJulAugSepOctNovDecMar 237.0 mphMar 237.0 mphAug 34.6 mphAug 34.6 mphSep 215.8 mphSep 215.8 mphMay 275.8 mphMay 275.8 mph
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 Owatonna varies throughout the year.

The wind is most often from the north for 2.6 months, from February 9 to April 26, with a peak percentage of 33% on March 8. The wind is most often from the south for 7.1 months, from April 26 to November 29, with a peak percentage of 45% on September 3. The wind is most often from the west for 2.3 months, from November 29 to February 9, with a peak percentage of 35% on January 1.

Wind Direction

Wind Direction in OwatonnaWNSW0%20%40%60%80%100%JanFebMarAprMayJunJulAugSepOctNovDecwestsoutheastnorth
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 extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 3.5 months, from May 5 to August 20, with an average daily incident shortwave energy per square meter above 5.9 kWh. The brightest day of the year is July 4, with an average of 7.1 kWh.

The darker period of the year lasts for 3.4 months, from October 30 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 18, with an average of 1.5 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 Owatonna are 44.084 deg latitude, -93.226 deg longitude, and 1,188 ft elevation.

The topography within 2 miles of Owatonna contains only modest variations in elevation, with a maximum elevation change of 131 feet and an average elevation above sea level of 1,180 feet. Within 10 miles also contains only modest variations in elevation (299 feet). Within 50 miles contains only modest variations in elevation (833 feet).

The area within 2 miles of Owatonna is covered by artificial surfaces (68%) and cropland (28%), within 10 miles by cropland (96%), and within 50 miles by cropland (90%).

Data Sources

This report illustrates the typical weather in Owatonna, 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 Owatonna.

For each station, the records are corrected for the elevation difference between that station and Owatonna 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 Owatonna is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Owatonna and a given station.

The stations contributing to this reconstruction are: Owatonna Degner Regional Airport (90%, 5.2 kilometers, northwest); Dodge Center Airport (6%, 32 kilometers, east); and Albert Lea Municipal Airport (3.6%, 46 kilometers, south).

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 .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.