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Average Weather in Winona Mississippi, United States

In Winona, the summers are long, hot, and muggy; the winters are short, cold, and wet; and it is partly cloudy year round. Over the course of the year, the temperature typically varies from 35°F to 90°F and is rarely below 22°F or above 96°F.

Based on the tourism score, the best times of year to visit Winona for warm-weather activities are from late April to mid June and from late August to mid October.

Climate Summary

coldcoolwarmhotwarmcoolJanFebMarAprMayJunJulAugSepOctNovDecNowNow69%69%48%48%clearovercastprecipitation: 5.2 inprecipitation: 5.2 in2.5 in2.5 inmuggy: 94%muggy: 94%0%0%drydrytourism score: 6.1tourism score: 6.11.31.3
Click on each chart for more information.

Temperature

The hot season lasts for 4.0 months, from May 23 to September 24, with an average daily high temperature above 83°F. The hottest day of the year is July 22, with an average high of 90°F and low of 71°F.

The cool season lasts for 2.9 months, from November 30 to February 24, with an average daily high temperature below 60°F. The coldest day of the year is January 16, with an average low of 35°F and high of 53°F.

Average High and Low Temperature

Average High and Low Temperature in WinonahotcoolcoolJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FJan 1653°FJan 1653°FJul 2290°FJul 2290°F35°F35°F71°F71°FMay 2383°FMay 2383°FSep 2483°FSep 2483°FNov 3060°FNov 3060°FFeb 2460°FFeb 2460°F63°F63°F61°F61°F42°F42°F40°F40°FNowNow
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 WinonaJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowvery coldvery coldvery coldcoldcoldcoolcoolcomfortablewarmhotvery cold
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Tepehan, Turkey (6,503 miles away) and Baiyun, China (7,924 miles) are the far-away foreign places with temperatures most similar to Winona (view comparison).

Clouds

In Winona, 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 Winona begins around June 2 and lasts for 5.5 months, ending around November 17. On October 4, 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 November 17 and lasts for 6.5 months, ending around June 2. On January 4, the cloudiest day of the year, the sky is overcast or mostly cloudy 52% of the time, and clear, mostly clear, or partly cloudy 48% of the time.

Cloud Cover Categories

Cloud Cover Categories in WinonaclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Oct 469%Oct 469%Jan 448%Jan 448%Jun 258%Jun 258%Nov 1759%Nov 1759%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

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

The wetter season lasts 8.0 months, from December 10 to August 12, with a greater than 31% chance of a given day being a wet day. The chance of a wet day peaks at 40% on July 12.

The drier season lasts 4.0 months, from August 12 to December 10. The smallest chance of a wet day is 22% on October 8.

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 throughout the year is rain alone, with a peak probability of 40% on July 12.

Daily Chance of Precipitation

Daily Chance of Precipitation in WinonawetwetdryJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jul 1240%Jul 1240%Oct 822%Oct 822%Jan 130%Jan 130%Aug 1231%Aug 1231%NowNowrainmixed
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. Winona experiences significant seasonal variation in monthly rainfall.

Rain falls throughout the year in Winona. The most rain falls during the 31 days centered around December 5, with an average total accumulation of 5.1 inches.

The least rain falls around August 22, with an average total accumulation of 2.5 inches.

Average Monthly Rainfall

Average Monthly Rainfall in WinonaJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 inDec 55.1 inDec 55.1 inAug 222.5 inAug 222.5 inApr 135.1 inApr 135.1 inJan 164.4 inJan 164.4 inNowNow
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

The sliding 31-day liquid-equivalent quantity of snowfall in Winona does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.

Average Liquid-Equivalent Monthly Snowfall

Average Liquid-Equivalent Monthly Snowfall in WinonasnowJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in1 in1 in2 in2 in3 in3 in4 in4 in5 in5 inFeb 10.1 inFeb 10.1 inJul 270.0 inJul 270.0 inDec 270.1 inDec 270.1 in
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 Winona varies significantly over the course of the year. In 2021, the shortest day is December 21, with 9 hours, 56 minutes of daylight; the longest day is June 20, with 14 hours, 23 minutes of daylight.

Hours of Daylight and Twilight

Hours of Daylight and Twilight in WinonaJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 6 minMar 2012 hr, 6 minMar 2014 hr, 23 minJun 2014 hr, 23 minJun 2012 hr, 8 minSep 2212 hr, 8 minSep 229 hr, 56 minDec 219 hr, 56 minDec 21nightnightdayNowNow
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 5:48 AM on June 12, and the latest sunrise is 1 hour, 34 minutes later at 7:22 AM on November 6. The earliest sunset is at 4:50 PM on December 4, and the latest sunset is 3 hours, 22 minutes later at 8:12 PM on June 29.

Daylight saving time (DST) is observed in Winona during 2021, starting in the spring on March 14, lasting 7.8 months, and ending in the fall on November 7.

Sunrise & Sunset with Twilight and Daylight Saving Time

Sunrise & Sunset with Twilight and Daylight Saving Time in WinonaJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 125:48 AMJun 125:48 AM8:12 PMJun 298:12 PMJun 29Dec 44:50 PMDec 44:50 PM7:22 AMNov 67:22 AMNov 6Mar 14DSTMar 14DSTDSTNov 7DSTNov 7daynightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2021. 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.

Moon

The figure below presents a compact representation of key lunar data for 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

Moon Rise, Set & Phases

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

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.

Winona experiences extreme seasonal variation in the perceived humidity.

The muggier period of the year lasts for 4.9 months, from May 7 to October 5, during which time the comfort level is muggy, oppressive, or miserable at least 24% of the time. The muggiest day of the year is July 22, with muggy conditions 94% of the time.

The least muggy day of the year is February 9, when muggy conditions are essentially unheard of.

Humidity Comfort Levels

Humidity Comfort Levels in WinonamuggyJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Feb 90%Feb 90%94%Jul 2294%Jul 22May 724%May 724%Oct 524%Oct 524%NowNowoppressiveoppressivedrydrymuggymuggyhumidhumid
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

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 Winona experiences mild seasonal variation over the course of the year.

The windier part of the year lasts for 7.2 months, from October 11 to May 18, with average wind speeds of more than 5.0 miles per hour. The windiest day of the year is March 1, with an average hourly wind speed of 6.3 miles per hour.

The calmer time of year lasts for 4.8 months, from May 18 to October 11. The calmest day of the year is July 29, with an average hourly wind speed of 3.7 miles per hour.

Average Wind Speed

Average Wind Speed in WinonawindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph1 mph1 mph2 mph2 mph3 mph3 mph4 mph4 mph5 mph5 mph6 mph6 mph7 mph7 mph8 mph8 mph9 mph9 mph10 mph10 mphMar 16.3 mphMar 16.3 mphJul 293.7 mphJul 293.7 mphOct 115.0 mphOct 115.0 mphMay 185.0 mphMay 185.0 mphNowNow
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 Winona varies throughout the year.

The wind is most often from the south for 4.7 months, from February 23 to July 13; for 2.9 weeks, from July 31 to August 20; and for 2.3 months, from October 15 to December 23, with a peak percentage of 47% on May 4. The wind is most often from the east for 1.1 months, from August 20 to September 24, with a peak percentage of 34% on September 14. The wind is most often from the north for 3.0 weeks, from September 24 to October 15 and for 2.0 months, from December 23 to February 23, with a peak percentage of 33% on September 29.

Wind Direction

Wind Direction in WinonaNSWSENSJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsoutheastnorth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Best Time of Year to Visit

To characterize how pleasant the weather is in Winona throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best times of year to visit Winona for general outdoor tourist activities are from late April to mid June and from late August to mid October, with a peak score in the third week of September.

Tourism Score

Tourism Score in Winonabest timebest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.16.11.31.36.06.05.05.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature tourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Winona for hot-weather activities is from early June to mid September, with a peak score in the last week of August.

Beach/Pool Score

Beach/Pool Score in Winonabest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.06.00.10.16.06.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature beach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Growing Season

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Winona typically lasts for 7.7 months (234 days), from around March 19 to around November 8, rarely starting before February 26 or after April 10, and rarely ending before October 19 or after November 30.

Time Spent in Various Temperature Bands and the Growing Season

Time Spent in Various Temperature Bands and the Growing Season in Winonagrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%50%Mar 1950%Mar 1950%Nov 850%Nov 890%Apr 1090%Apr 1090%Oct 1990%Oct 1910%Feb 2610%Feb 2610%Nov 3010%Nov 30Jul 14100%Jul 14100%NowNowfreezingvery coldcoldcoolcomfortablewarmhot
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms in Winona should appear around February 6, only rarely appearing before January 21 or after February 25.

Growing Degree Days

Growing Degree Days in WinonaJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F1,000°F1,000°F2,000°F2,000°F3,000°F3,000°F4,000°F4,000°F5,000°F5,000°FFeb 688°FFeb 688°FMay 5900°FMay 5900°FJun 141,800°FJun 141,800°FDec 315,418°FDec 315,418°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

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 significant seasonal variation over the course of the year.

The brighter period of the year lasts for 4.7 months, from April 8 to August 31, with an average daily incident shortwave energy per square meter above 5.8 kWh. The brightest day of the year is June 2, with an average of 6.6 kWh.

The darker period of the year lasts for 2.6 months, from November 14 to February 4, with an average daily incident shortwave energy per square meter below 3.4 kWh. The darkest day of the year is December 25, with an average of 2.6 kWh.

Average Daily Incident Shortwave Solar Energy

Average Daily Incident Shortwave Solar Energy in WinonabrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWhJun 26.6 kWhJun 26.6 kWhDec 252.6 kWhDec 252.6 kWhApr 85.8 kWhApr 85.8 kWhAug 315.8 kWhAug 315.8 kWhFeb 43.4 kWhFeb 43.4 kWhNowNow
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 Winona are 33.482 deg latitude, -89.728 deg longitude, and 381 ft elevation.

The topography within 2 miles of Winona contains only modest variations in elevation, with a maximum elevation change of 203 feet and an average elevation above sea level of 400 feet. Within 10 miles also contains only modest variations in elevation (361 feet). Within 50 miles contains only modest variations in elevation (636 feet).

The area within 2 miles of Winona is covered by cropland (56%) and trees (33%), within 10 miles by trees (72%) and cropland (24%), and within 50 miles by trees (56%) and cropland (32%).

Data Sources

This report illustrates the typical weather in Winona, 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 4 weather stations near enough to contribute to our estimation of the temperature and dew point in Winona.

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

The stations contributing to this reconstruction are: Greenwood-Leflore Airport (63%, 33 kilometers, west); George M Bryan Airport (17%, 82 kilometers, east); University-Oxford Airport (12%, 102 kilometers, north); and Jackson-Evers International Airport (8%, 133 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 Algorithms 2nd Edition , 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 airports 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.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.