Des Moines
Iowa, USA
Long-term weather forecast
Long-term weather forecast

May weather forecast and climate
Des Moines, IA

A close view of city buildings in Des Moines, Iowa
A close view of city buildings in Des Moines, Iowa
May, the last month of the spring, in Des Moines, is a pleasant month, with average temperature varying between 52.2°F (11.2°C) and 72.3°F (22.4°C).

Temperature

In Des Moines, Iowa, the average high-temperature increases, from an enjoyable 62.2°F (16.8°C) in April, to an agreeable 72.3°F (22.4°C). In May, in Des Moines, the average low-temperature is 52.2°F (11.2°C).

Humidity

The least humid month is May, with an average relative humidity of 63%.

Rainfall

In Des Moines, during May, the rain falls for 12.5 days and regularly aggregates up to 4.7" (120.4mm) of precipitation. In Des Moines, Iowa, during the entire year, the rain falls for 113.4 days and collects up to 36" (914.9mm) of precipitation.

Snowfall

In May, it doesn't snow. April is the latest month when it typically snows. Throughout the year, in Des Moines, 35.3" (896.7mm) of snow is accumulated.

Daylight

In May, the average length of the day in Des Moines is 14.6h.

Sunshine

In Des Moines, the average sunshine is 8.9h.

UV index

The average daily maximum UV index in Des Moines, Iowa, is 8. A UV Index estimate of 8 to 10 represents a very high health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In May, the average maximum UV index of 8 translate into the following recommendations:
Take extra precautions. Fair-skinned individuals may get burned in less than 10 minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in May in Des Moines?

The average high-temperature, in May, in Des Moines, is 72.3°F (22.4°C), while the average low-temperature is 52.2°F (11.2°C).

What is the least humid month in Des Moines?

With an average relative humidity of 63%, May is the least humid month in Des Moines, Iowa.

What is the average humidity in May in Des Moines?

In Des Moines, the average relative humidity in May is 63%.

How many days does it rain in May in Des Moines?

In Des Moines, in May, during 12.5 rainfall days, 4.7" (120.4mm) of precipitation is typically accumulated.

Does it snow in Des Moines in May?

In May, in Des Moines, Iowa, it doesn't snow. April is the latest month when it typically snows.

How many hours of daylight does Des Moines have in May?

The average length of the day in May in Des Moines is 14.6h.

How long on average sun shines in May in Des Moines?

The average sunshine in May in Des Moines is 8.9h.

What is the UV index reading in May in Des Moines?

The average daily maximum UV index in May in Des Moines, Iowa, is 8. A UV Index reading of 8 to 10 represents a very high health risk from the exposure to the Sun's UV radiation.
Average temperature in May - Des Moines, IA
  • Average high temperature in May: 72.4°F

The warmest month (with the highest average high temperature) is July (85.7°F).
The month with the lowest average high temperature is January (31°F).

  • Average low temperature in May: 52.2°F

The month with the highest average low temperature is July (66.8°F).
The coldest month (with the lowest average low temperature) is January (14.3°F).

Average humidity in May - Des Moines, IA
  • Average humidity in May: 63%

The month with the highest relative humidity is December (74.6%).
The month with the lowest relative humidity is May (63%).

Average rainfall in May - Des Moines, IA
  • Average rainfall in May: 4.7"

The wettest month (with the highest rainfall) is June (4.9").
The driest month (with the lowest rainfall) is January (1").

Average rainfall days in May - Des Moines, IA
  • Average rainfall days in May: 12.5 days

The month with the highest number of rainy days is May (12.5 days).
The month with the lowest number of rainy days is January (7.5 days).

Average snowfall in May - Des Moines, IA
  • Average snowfall in May: 0"

The month with the highest snowfall is December (9").
Months with the lowest snowfall are May, June, July, August and September (0").

Average snowfall days in May - Des Moines, IA
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (6.5 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

Average daylight in May / Average sunshine in May - Des Moines, IA
  • Average daylight in May: 14.6h

The month with the longest days is June (Average daylight: 15.2h).
The month with shortest days is December (Average daylight: 9.2h).

  • Average sunshine in May: 8.9h

The month with most sunshine is July (Average sunshine: 10.9h).
The month with least sunshine is December (Average sunshine: 4.2h).

Average UV index in May - Des Moines, IA
  • Average UV index in May: 8

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January and December (UV index 1).