May weather forecast
Winona, MN

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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). Vegetation is resplendent during this time, courtesy of the combination of rising temperatures and rainfall. With favourable weather conditions, locals and tourists alike can engage in various outdoor activities.

Temperature

As May sets, the average high-temperature shows an increase, moving up from a cool 52.9°F (11.6°C) in April to a refreshing 64.9°F (18.3°C). Winona records an average nighttime low-temperature of 47.5°F (8.6°C) throughout May.

Humidity

In May, the average relative humidity is 81%.

Rainfall

In Winona, in May, it is raining for 17.9 days, with typically 3.35" (85mm) of accumulated precipitation. Throughout the year, in Winona, there are 132.9 rainfall days, and 24.88" (632mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Winona, Minnesota. May is the last month it regularly snows. During 0.3 snowfall days, in May, Winona aggregates 0.28" (7mm) of snow. In Winona, during the entire year, snow falls for 48.6 days and aggregates up to 19.13" (486mm) of snow.

Daylight

In May, the average length of the day is 14h and 47min.
On the first day of May in Winona, sunrise is at 5:56 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 5:26 am and sunset at 8:42 pm CDT.

Sunshine

In May, the average sunshine in Winona is 8.3h.

UV index

In Winona, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.
Note: A typical high UV index of 5 in May suggests the following recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. Around midday, solar radiation is most harmful; hence, exposure should be limited. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
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Frequently asked questions

What is the usual temperature for Winona in May?

During May, Winona experiences an average high-temperature of 64.9°F (18.3°C) and a low-temperature of 47.5°F (8.6°C).

What is the average humidity in May in Winona?

In May, the average relative humidity in Winona, Minnesota, is 81%.

How much does it rain in Winona in May?

In Winona, Minnesota, in May, it is raining for 17.9 days, with typically 3.35" (85mm) of accumulated precipitation.

What is the last month it snows in Winona?

May is the last month it regularly snows in Winona. During 0.3 snowfall days, in May, Winona aggregates 0.28" (7mm) of snow.

What is the average length of the day in May in Winona?

In Winona, the average day length in May is 14h and 47min.

When are sunrise and sunset in May in Winona?

In May, on the first day of the month, sunrise is at 5:56 am and sunset at 8:10 pm. On the last day of the month, in Winona, Minnesota, sunrise is at 5:26 am and sunset at 8:42 pm CDT.

How many hours of sunshine does Winona have in May?

The average sunshine duration in May in Winona is 8.3h.

What is the UV index reading in May in Winona?

In May, the average daily maximum UV index in Winona is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Winona, MN

Average temperature in May - Winona, MN
  • Average high temperature in May: 64.9°F

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).

  • Average low temperature in May: 47.5°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).

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Average pressure in May
Winona, MN

Average pressure in May - Winona, MN
  • Average pressure in May: 29.94"Hg

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).

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Average wind speed in May
Winona, MN

Average wind speed in May - Winona, MN
  • Average wind speed in May: 8.1mph

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).

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Average humidity in May
Winona, MN

Average humidity in May - Winona, MN
  • Average humidity in May: 81%

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

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Average rainfall in May
Winona, MN

Average rainfall in May - Winona, MN
  • Average rainfall in May: 3.35"

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

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Average rainfall days in May
Winona, MN

Average rainfall days in May - Winona, MN
  • Average rainfall days in May: 17.9 days

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).

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Average snowfall in May
Winona, MN

Average snowfall in May - Winona, MN
  • Average snowfall in May: 0.28"

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

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Average snowfall days in May
Winona, MN

Average snowfall days in May - Winona, MN
  • Average snowfall days in May: 0.3 days

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).

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Average daylight in May /
Average sunshine in May
Winona, MN

Average daylight in May / Average sunshine in May - Winona, MN
  • Average daylight in May: 14h and 5min

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).

  • Average sunshine in May: 8h and 2min

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).

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Average sunshine days in May
Winona, MN

Average sunshine days in May - Winona, MN
  • Average sunshine days in May: 11.4 days

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

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Average UV index in May
Winona, MN

Average UV index in May - Winona, MN
  • Average UV index in May: 5

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).

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Average cloud cover in May
Winona, MN

Average cloud cover in May - Winona, MN
  • Average cloud cover in May: 45

The month with the most cloud cover is January (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 33).

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Average visibility in May
Winona, MN

Average visibility in May - Winona, MN
  • Average visibility in May: 6mi

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).

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Winona, Minnesota, USA

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