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

The shift into May is marked by a rise in the average high-temperature, moving from April's cool 52.9°F (11.6°C) to a comfortable 64.9°F (18.3°C). Winona, during the nights of May, experiences an average temperature drop to a frosty 47.5°F (8.6°C).

Humidity

The average relative humidity in May is 81%.

Rainfall

In Winona, Minnesota, during May, the rain falls for 17.9 days and regularly aggregates up to 3.35" (85mm) of precipitation. Throughout the year, in Winona, there are 132.9 rainfall days, and 24.88" (632mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. 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 Winona, the average length of the day in May is 14h and 47min.
On the first day of the month, sunrise is at 5:56 am and sunset at 8:10 pm. On the last day of May, sunrise is at 5:26 am and sunset at 8:42 pm CDT.

Sunshine

The average sunshine in May is 8.3h.

UV index

The average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.
Note: The maximum UV index of 5 during May leads to these instructions:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Take to heart! Snow reflection can almost magnify the Sun's UV radiation twofold.

Frequently asked questions

What are the temperatures in May?

In Winona, 64.9°F (18.3°C) is the average high-temperature and 47.5°F (8.6°C) is the average low-temperature during May.

What is the average humidity in May?

The average relative humidity in May is 81%.

How much does it rain in May?

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

What is the last month it snows?

May is the last month it regularly snows. 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 May, the average day length is 14h and 47min.

What time are sunrise and sunset in May?

On the first day of May, 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.

How many hours of sunshine does Winona have in May?

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

What is the UV index intensity in May?

In Winona, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate health threat 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).

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).

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).

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%).

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").

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).

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").

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).

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).

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).

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).

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).

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).

Winona, Minnesota, USA

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