May weather forecast and climate
Mason City, IA

Weather in May

May, the last month of the spring, in Mason City, is a comfortable month, with average temperature fluctuating between 51.3°F (10.7°C) and 67.3°F (19.6°C).

Temperature

In Mason City, Iowa, the average high-temperature in May increases, from a cool 54.9°F (12.7°C) in April, to an enjoyable 67.3°F (19.6°C). In Mason City, the average low-temperature is 51.3°F (10.7°C).

Humidity

In May, the average relative humidity is 74%.

Rainfall

In Mason City, Iowa, in May, it is raining for 19.1 days, with typically 3.78" (96mm) of accumulated precipitation. In Mason City, during the entire year, the rain falls for 145.9 days and collects up to 28.82" (732mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Mason City. May is the last month it regularly snows. During 0.4 snowfall days, Mason City aggregates 0.63" (16mm) of snow. In Mason City, Iowa, during the entire year, snow falls for 60.2 days, and aggregates up to 26.26" (667mm) of snow.

Daylight

In Mason City, the average length of the day in May is 14.7h.

Sunshine

In May, the average sunshine is 8.4h.

UV index

In Mason City, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in May in Mason City?

The average relative humidity in May in Mason City is 74%.

How much does it rain in Mason City in May?

In May, in Mason City, Iowa, the rain falls for 19.1 days. Throughout May, 3.78" (96mm) of precipitation is accumulated.

What is the last month it snows in Mason City?

May is the last month it regularly snows. During 0.4 snowfall days, in May, Mason City aggregates 0.63" (16mm) of snow.

What is the average length of the day in May in Mason City?

The average length of the day in May is 14.7h.

How many hours of sunshine does Mason City have in May?

In Mason City, Iowa, the average sunshine in May is 8.4h.

What is the UV index intensity in May in Mason City?

In May, the average daily maximum UV index in Mason City, Iowa, is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV radiation.

Average temperature in May
Mason City, IA

Average temperature in May - Mason City, IA
  • Average high temperature in May: 67.3°F

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (22.3°F).

  • Average low temperature in May: 51.3°F

The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (9.9°F).

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Average pressure in May
Mason City, IA

Average pressure in May - Mason City, IA
  • Average pressure in May: 29.93"

The month with the highest atmospheric pressure is January (30.15").
The month with the lowest atmospheric pressure is June (29.88").

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Average wind speed in May
Mason City, IA

Average wind speed in May - Mason City, IA
  • Average wind speed in May: 9.4mph

The windiest months (with the highest average wind speed) are January and April (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.3mph).

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Average humidity in May
Mason City, IA

Average humidity in May - Mason City, IA
  • Average humidity in May: 74%

The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in May
Mason City, IA

Average rainfall in May - Mason City, IA
  • Average rainfall in May: 3.78"

The wettest month (with the highest rainfall) is June (4.65").
The driest month (with the least rainfall) is January (1.06").

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Average rainfall days in May
Mason City, IA

Average rainfall days in May - Mason City, IA
  • Average rainfall days in May: 19.1 days

The month with the highest number of rainy days is June (19.8 days).
The month with the least rainy days is February (3.8 days).

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Average snowfall in May
Mason City, IA

Average snowfall in May - Mason City, IA
  • Average snowfall in May: 0.63"

The month with the highest snowfall is February (7.48").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Mason City, IA

Average snowfall days in May - Mason City, IA
  • Average snowfall days in May: 0.4 days

The month with the highest number of snowfall days is January (14.6 days).
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
Mason City, IA

Average daylight in May / Average sunshine in May - Mason City, IA
  • Average daylight in May: 14.7h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9h).

  • Average sunshine in May: 8.4h

The month with the most sunshine is July (Average sunshine: 9.8h).
The month with the least sunshine is January (Average sunshine: 3.5h).

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Average sunshine days in May
Mason City, IA

Average sunshine days in May - Mason City, IA
  • Average sunshine days in May: 9.7 days

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (8 days).

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Average UV index in May
Mason City, IA

Average UV index in May - Mason City, IA
  • Average UV index in May: 5

The month with the highest UV index is June (UV index 6).
Months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in May
Mason City, IA

Average cloud cover in May - Mason City, IA
  • Average cloud cover in May: 43

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in May
Mason City, IA

Average visibility in May - Mason City, IA
  • Average visibility in May: 6mi

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

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