Climate and monthly weather forecast
Winona, MN

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The climate of Winona

Winona, Minnesota finds its weather under the influence of a humid continental climate, hot summers, and no dry season, as characterized by the Köppen climate classification Dfa. Nestled in the North American region, this city experiences wide-ranging seasonal transitions, from severe wintry conditions to hot summers.

From a climatological viewpoint, the annual average high temperatures range from 20.8°F (-6.2°C) in January to 78.4°F (25.8°C) in July. The lowest temperatures dip to 7.9°F (-13.4°C) in January and rise to 60.8°F (16°C) in July, signifying a marked temperature gradient throughout the year. Copious amounts of precipitation are noteworthy, with monthly averages escalating from 0.67" (17mm) in January to a peak of 4.49" (114mm) in June.

Relative humidity hovers around 90% in the early part of the year and gradually descends to 76% by October, reaffirming the humid continental climate. A striking weather pattern emerges in snowfall trends, with the city experiencing maximum snowfall in February with 5.55" (141mm), gradually tapering off to nil by June. Unsurprisingly, February also records the highest number of snowfall days, totaling 11.1 days.

The best time to visit Winona

A discerning traveler would find the span between May to September as the most favorable period to visit Winona. During these months, the temperatures hover between a comfortable 52.9°F (11.6°C) and 77°F (25°C), highlighting the onset of spring and carrying through the warmth of summer.

Sunshine duration also notably increases during this timeframe, averaging between 8.3 to 9.7 hours per day, allowing ample time for sightseeing and outdoor activities. The UV index, in spite of peaking to 6 in July, remains mostly moderate signifying lesser chances of sunburns.

The worst time to visit Winona

The stretch from November to February could be termed as less conducive for visitors due to the stark winter chill. During this period, temperatures plummet to chilling lows between 15.8°F (-9°C) to 27°F (-2.8°C), warranting heavy winter wear.

Additionally, the sunlight received is curtailed considerably to 3.6 to 4.8 hours per day, resulting in shorter daylight spans for tourists. The persistent high relative humidity, peaking to 90% in January, aggravates the winter chills, making it uncomfortable for tours and outdoor activities.

Spring weather in Winona

The advent of spring in Winona brings about a welcome change in weather. From the chilly climes of March where the temperatures hover around 25°F (-3.9°C) to 36°F (2.2°C), the region warms up to a pleasant 47.5°F (8.6°C) to 64.9°F (18.3°C) by May.

Rainfall increases steadily from 1.26" (32mm) in March to 3.35" (85mm) in May, contributing to the lush green scenery. The number of daylight hours extends from 12 hours in March to nearly 15 hours in May, casting longer sunny spells across the landscapes.

Summer weather in Winona

Summers in Winona span from June to August. During this period, the region experiences its warmest weather with temperatures oscillating from 56.8°F (13.8°C) to a peak of 78.4°F (25.8°C).

Despite the heightened temperatures, the city witnesses its maximum precipitation of 4.49" (114mm) in June, before it tapers to 2.52" (64mm) in August. The summer days are long, boasting about 15 hours of daylight daily and filled with bountiful sunlight averaging around 9 hours per day.

Autumn weather in Winona

September ushers in Autumn in Winona and it extends until November. During these months, temperatures start to descend from a warm 51.3°F (10.7°C) to a cooler 28.6°F (-1.9°C) by November.

Rainfall also reduces gradually, averaging from 2.09" (53mm) in September to 1.06" (27mm) in November, paving way for clearer skies. Despite the cooling weather and reducing daylight hours, Autumn carries an aesthetic appeal with the changing foliage.

Winter weather in Winona

The winter in Winona is characteristic of sub-zero temperatures, snowfall and high humidity. Extending from December to February, the season experiences temperatures fluctuating between a freezing 7.9°F (-13.4°C) to 24.8°F (-4°C).

Snowfall is a common occurrence, with an average of 10.6 snowfall days in December, coupled with a significant amount of snow measuring 3.62" (92mm). The days are truncated to approximately 9 hours of daylight in December, the shortest of the year, thus the winter season bears a stark contrast to the prevalent warmth of the previous months.

Weather in January

In comparison to the preceding month, climatic conditions in Winona, Minnesota, register a sharp drop in January, typifying the winter experience in this region. Frosty temperatures pervade with average high and low records revolving around 20.8°F (-6.2°C) and 7.9°F (-13.4°C) respectively. Weather in January »

Weather in February

February, which is enveloped within the winter period, brings forth a slight increment in temperature when juxtaposed with January. However, cold weather prevails in this month, too. The city experiences snowfall reaching 5.55" (141mm) with 11.1 days covered in snow. Weather in February »

Weather in March

March in Winona witnesses a significant shift as winter starts to lose its grip over the city, and spring begins its advent. temperatures start to rise from the winter lows, with daytime highs reaching into the comfortable 30s°F. Weather in March »

Weather in April

As spring advances in April, Winona experiences a reassuring rise in temperatures, building on the modest gains of March. Snow ceases, giving way to growing rainfall, as the environment commences its rejuvenation process. April weather is, for the most part, characterized by cooler mornings and warm afternoons. Weather in April »

Weather in May

May carries along the pleasant respite from the colder months, heralding the onset of summer in Winona. The month features balmy days and comfortably cool nights. However, May also brings along the highest rainfall of the year, measuring up to 3.35" (85mm). Weather in May »

Weather in June

June provides ideal summer weather with temperate conditions ruling over Winona. With the increase in temperature, UV index begins to peak, driving residents to don protective gears. The rainfall persists but at a lesser intensity than the preceding month. Weather in June »

Weather in July

July presents the highest average temperatures observed in Winona all year round, topping at 78.4°F (25.8°C). This month sees the residents enjoying pleasant summers, marked by long, sunny days and elevated humidity reserves. This weather is perfect for a myriad of water-based activities along the Mississippi River. Weather in July »

Weather in August

In August, the summer warmth persists, although there is a slight drop in maximum temperatures compared to July. The town experiences relatively clear skies with a reduction in cloud coverage. Winona's landscapes become more alluring as rainfall decreases to a smaller 2.52" (64mm), much lower than summer peaks. Weather in August »

Weather in September

September bids farewell to the summer weather as fall creeps up with a noticeable drop in temperature. As the nights turn cooler, autumn paints the cityscape in hues of orange and red. The rainfall further dwindles down to a modest 2.09" (53mm). Weather in September »

Weather in October

October in Winona showcases the full effect of fall with mild days and chilly nights. The drop in temperature is visible in comparison to September. It also witnesses the re-emergence of snowfall, albeit at a minimal 0.31" (8mm), hinting at the forthcoming winter. Weather in October »

Weather in November

The brisk weather in November is characterized by rapid temperature drops from pleasant fall temps to the cold embrace of winter. The first half of November maintains autumnal characteristics before snow starts claiming days slowly. Weather in November »

Weather in December

December declares the arrival of winter in full swing, plunging Winona into the coldest conditions of the year. The days are characterized by frigid weather, scarce sunlight, and increase snowfalls reaching 3.62" (92mm) over approximately 10.6 days. Weather in December »
Updated: Jul 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest in Winona?

The coldest period is January, when temperatures fluctuate between an average high of 20.8°F (-6.2°C) and a low of 7.9°F (-13.4°C).

What is the most humid month?

With an average relative humidity of 90%, January is the most humid month.

What is the driest month?

January is the month with the least rainfall. Rain falls for 3.2 days and accumulates 0.67" (17mm) of precipitation.

How many days does it rain?

Throughout the year, there are 132.9 rainfall days, and 24.88" (632mm) of precipitation is accumulated.

When does it snow in Winona?

Months with snowfall are January through May, October through December.

How much does it snow?

In Winona, Minnesota, during the entire year, snow falls for 48.6 days and aggregates up to 19.13" (486mm) of snow.

What is the month with the least sunshine in Winona?

With an average of 3.2h of sunshine, January has the least sunshine of the year.

What is the month with the lowest UV index?

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

What is the snowiest month in Winona?

The month with the most snowfall is February, when snow falls for 11.1 days and typically aggregates up to 5.55" (141mm) of snow.

When is Daylight Saving Time (DST)?

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 wettest month?

June is the month with the most rainfall. Rain falls for 18.7 days and accumulates 4.49" (114mm) of precipitation.

When it does not snow?

June through September are months without snowfall.

When are the longest days?

June has the longest days of the year, with an average of 15h and 24min of daylight.

What is the hottest time of year?

In Winona, July is the warmest month, with temperatures averaging a high of 78.4°F (25.8°C) and a low of 60.8°F (16°C).

What month has the most sunshine?

With an average of 9.7h of sunshine, July has the most sunshine of the year in Winona.

When is the highest UV index?

With an average maximum UV index of 6, July is the month with the highest UV index.

What is the least humid month?

October is the least humid month, with an average relative humidity of 76%.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 0min of daylight.

Average temperature
Winona, MN

Average temperature - Winona, MN

The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (20.8°F).

The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (7.9°F).

Average pressure
Winona, MN

Average pressure - Winona, MN

The months with the highest atmospheric pressure are January and February (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

Average wind speed
Winona, MN

Average wind speed - Winona, MN

The windiest month (with the highest average wind speed) is April (9.5mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).

Average humidity
Winona, MN

Average humidity - Winona, MN

The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is October (76%).

Average rainfall
Winona, MN

Average rainfall - Winona, MN

The wettest month (with the highest rainfall) is June (4.49").
The driest month (with the least rainfall) is January (0.67").

Average rainfall days
Winona, MN

Average rainfall days - Winona, MN

The month with the highest number of rainy days is June (18.7 days).
The month with the least rainy days is February (2.3 days).

Average snowfall
Winona, MN

Average snowfall - Winona, MN

The month with the highest snowfall is February (5.55").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days
Winona, MN

Average snowfall days - Winona, MN

The months with the highest number of snowfall days are January and February (11.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine
Winona, MN

Average daylight / Average sunshine - Winona, MN

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).

Average sunshine days
Winona, MN

Average sunshine days - Winona, MN

The month with the most sunshine days is December (18.4 days).
The month with the least sunshine days is June (9.4 days).

Average UV index
Winona, MN

Average UV index - Winona, MN

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

Average visibility
Winona, MN

Average visibility - Winona, MN

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

Winona, Minnesota, USA

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