May weather forecast
Royalton, WI

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Weather in May

May, the last month of the spring in Royalton, is a refreshing month, with an average temperature fluctuating between 46.4°F (8°C) and 64.2°F (17.9°C).

Temperature

Royalton experiences a temperature shift with the start of May, with average high-temperatures moving from a cool 51.1°F (10.6°C) in April to an enjoyable 64.2°F (17.9°C). Royalton observes an average nighttime temperature of 46.4°F (8°C) during May.

Humidity

The average relative humidity in May in Royalton is 77%.

Rainfall

May is the month with the most rainfall. Rain falls for 16.3 days and accumulates 3.66" (93mm) of precipitation.

Snowfall

Months with snowfall in Royalton, Wisconsin, are January through May, October through December. May is the last month it regularly snows in Royalton. During 0.1 snowfall days, in May, Royalton aggregates 0.08" (2mm) of snow. Throughout the year, there are 57.1 snowfall days, and 24.8" (630mm) of snow is accumulated.

Daylight

The average length of the day in May is 14h and 49min.
On the first day of May in Royalton, sunrise is at 5:44 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 5:14 am and sunset at 8:32 pm CDT.

Sunshine

In Royalton, the average sunshine in May is 8.9h.

UV index

May through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: During May, 5 as the daily maximum UV index converts into the following advice:
Undertake precautions - It is suggested to shield oneself from sunburn. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in May in Royalton?

The high-temperature during May is 64.2°F (17.9°C) and the low-temperature is 46.4°F (8°C).

What is the average humidity in May in Royalton?

In Royalton, Wisconsin, the average relative humidity in May is 77%.

What is the wettest month in Royalton?

May is the month with the most rainfall in Royalton, Wisconsin. Rain falls for 16.3 days and accumulates 3.66" (93mm) of precipitation.

How many days does it rain in May in Royalton?

In Royalton, Wisconsin, in May, it is raining for 16.3 days, with typically 3.66" (93mm) of accumulated precipitation.

What is the last month it snows in Royalton?

May is the last month it regularly snows. During 0.1 snowfall days, in May, Royalton aggregates 0.08" (2mm) of snow.

How many hours of daylight does Royalton have in May?

The average day length in May in Royalton is 14h and 49min.

When is the sunrise / sunset in May in Royalton?

In May, on the first day of the month, sunrise is at 5:44 am and sunset at 8:00 pm. On the last day of the month, in Royalton, Wisconsin, sunrise is at 5:14 am and sunset at 8:32 pm CDT.

How many hours of sunshine does Royalton have in May?

In Royalton, Wisconsin, the average sunshine duration in May is 8.9h.

What are the months with the highest UV index in Royalton?

May through August, with an average maximum UV index of 5, are months with the highest UV index in Royalton.

What is the UV index intensity in May in Royalton?

In May, the average daily maximum UV index in Royalton, Wisconsin, is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to 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
Royalton, WI

Average temperature in May - Royalton, WI
  • Average high temperature in May: 64.2°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 (21.9°F).

  • Average low temperature in May: 46.4°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).

Average pressure in May
Royalton, WI

Average pressure in May - Royalton, WI
  • Average pressure in May: 29.96"Hg

The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).

Average wind speed in May
Royalton, WI

Average wind speed in May - Royalton, WI
  • Average wind speed in May: 8.7mph

The windiest month (with the highest average wind speed) is April (9.8mph).
The calmest month (with the lowest average wind speed) is August (7mph).

Average humidity in May
Royalton, WI

Average humidity in May - Royalton, WI
  • Average humidity in May: 77%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is April (76%).

Average rainfall in May
Royalton, WI

Average rainfall in May - Royalton, WI
  • Average rainfall in May: 3.66"

The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is January (1.18").

Average rainfall days in May
Royalton, WI

Average rainfall days in May - Royalton, WI
  • Average rainfall days in May: 16.3 days

The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is January (4 days).

Average snowfall in May
Royalton, WI

Average snowfall in May - Royalton, WI
  • Average snowfall in May: 0.08"

The month with the highest snowfall is January (6.06").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in May
Royalton, WI

Average snowfall days in May - Royalton, WI
  • Average snowfall days in May: 0.1 days

The month with the highest number of snowfall days is December (13 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in May /
Average sunshine in May
Royalton, WI

Average daylight in May / Average sunshine in May - Royalton, WI
  • Average daylight in May: 14h and 5min

The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).

  • Average sunshine in May: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

Average sunshine days in May
Royalton, WI

Average sunshine days in May - Royalton, WI
  • Average sunshine days in May: 13.2 days

The month with the most sunshine days is November (16.7 days).
The month with the least sunshine days is April (11.7 days).

Average UV index in May
Royalton, WI

Average UV index in May - Royalton, WI
  • Average UV index in May: 5

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).

Average cloud cover in May
Royalton, WI

Average cloud cover in May - Royalton, WI
  • Average cloud cover in May: 42

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 33).

Average visibility in May
Royalton, WI

Average visibility in May - Royalton, WI
  • Average visibility in May: 6mi

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

Royalton, Wisconsin, USA

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