May weather forecast
Merrillan, WI

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Weather in May

The warmer weather solidifies in May, as temperatures climb toward peak values. Rainfall continues to increase, making this the rainiest period until now. The prolonged daylight hours of up to 14.8 hours and increased sunshine brighten up the town. As the pressure fluctuates, wind speed drops slightly. It is in May that the last vestiges of winter's snow give way to the complete dominance of spring rains.

Temperature

The rise of average high-temperatures is seen in May in Merrillan, Wisconsin, with an increase from a cool 51.8°F (11°C) in April to a comfortable 64.9°F (18.3°C). In May, Merrillan encounters an average low-temperature of 46.9°F (8.3°C) during the night.

Humidity

In Merrillan, the average relative humidity in May is 79%.

Rainfall

In Merrillan, in May, during 15 rainfall days, 2.13" (54mm) of precipitation is typically accumulated. Throughout the year, there are 120.8 rainfall days, and 16.34" (415mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.5 snowfall days, in May, Merrillan aggregates 0.04" (1mm) of snow. In Merrillan, during the entire year, snow falls for 62.1 days and aggregates up to 13.11" (333mm) of snow.

Daylight

In Merrillan, Wisconsin, the average length of the day in May is 14h and 49min.
On the first day of May in Merrillan, sunrise is at 5:52 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 5:21 am and sunset at 8:40 pm CDT.

Sunshine

In Merrillan, the average sunshine in May is 8.5h.

UV index

May through August, with an average maximum UV index of 5, are months with the highest UV index in Merrillan. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.
Note: In May, an average UV index of 5 transforms into the following instructions:
Exercise prevention - Precautions against solar damage are endorsed. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
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Frequently asked questions

What is the temperature in May in Merrillan?

An average high-temperature, in May, in Merrillan, is 64.9°F (18.3°C) and the average low-temperature is 46.9°F (8.3°C).

What is the average humidity in May in Merrillan?

The average relative humidity in May in Merrillan, Wisconsin, is 79%.

How much does it rain in Merrillan in May?

In May, in Merrillan, the rain falls for 15 days. Throughout May, 2.13" (54mm) of precipitation is accumulated.

What is the last month it snows in Merrillan?

May is the last month it regularly snows in Merrillan. During 0.5 snowfall days, in May, Merrillan aggregates 0.04" (1mm) of snow.

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

In May, the average day length is 14h and 49min.

When are sunrise and sunset in May in Merrillan?

On the first day of May in Merrillan, sunrise is at 5:52 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 5:21 am and sunset at 8:40 pm CDT.

How many hours of sunshine does Merrillan have in May?

In Merrillan, the average sunshine duration in May is 8.5h.

When is the highest UV index in Merrillan?

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

What is the UV index intensity in May in Merrillan?

In May, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health 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
Merrillan, WI

Average temperature in May - Merrillan, WI
  • Average high temperature in May: 64.9°F

The warmest month (with the highest average high temperature) is July (78.6°F).
The month with the lowest average high temperature is January (20.7°F).

  • Average low temperature in May: 46.9°F

The month with the highest average low temperature is July (60.1°F).
The coldest month (with the lowest average low temperature) is January (7.3°F).

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Average pressure in May
Merrillan, WI

Average pressure in May - Merrillan, WI
  • Average pressure in May: 29.95"Hg

The months with the highest atmospheric pressure are January and February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in May
Merrillan, WI

Average wind speed in May - Merrillan, WI
  • Average wind speed in May: 8.2mph

The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).

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Average humidity in May
Merrillan, WI

Average humidity in May - Merrillan, WI
  • Average humidity in May: 79%

The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is April (77%).

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Average rainfall in May
Merrillan, WI

Average rainfall in May - Merrillan, WI
  • Average rainfall in May: 2.13"

The wettest month (with the highest rainfall) is June (2.91").
The driest month (with the least rainfall) is January (0.51").

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Average rainfall days in May
Merrillan, WI

Average rainfall days in May - Merrillan, WI
  • Average rainfall days in May: 15 days

The month with the highest number of rainy days is June (17.1 days).
The month with the least rainy days is February (2.8 days).

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Average snowfall in May
Merrillan, WI

Average snowfall in May - Merrillan, WI
  • Average snowfall in May: 0.04"

The month with the highest snowfall is February (2.99").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Merrillan, WI

Average snowfall days in May - Merrillan, WI
  • Average snowfall days in May: 0.5 days

The month with the highest number of snowfall days is January (15.4 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
Merrillan, WI

Average daylight in May / Average sunshine in May - Merrillan, 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 3min

The month with the most sunshine is July (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

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Average sunshine days in May
Merrillan, WI

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

The month with the most sunshine days is October (18.4 days).
The month with the least sunshine days is June (9.8 days).

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Average UV index in May
Merrillan, WI

Average UV index in May - Merrillan, 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, February, November and December (UV index 1).

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Average cloud cover in May
Merrillan, WI

Average cloud cover in May - Merrillan, WI
  • Average cloud cover in May: 44

The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 33).

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Average visibility in May
Merrillan, WI

Average visibility in May - Merrillan, WI
  • 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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Merrillan, Wisconsin, USA

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