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

Temperature

In Des Moines, the average high-temperature increases, from a comfortable 62.2°F (16.8°C) in April, to a pleasant 72.3°F (22.4°C). The average low-temperature, in Des Moines, Iowa, 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, it is raining for 12.5 days, with typically 4.7" (120.4mm) of accumulated precipitation. In Des Moines, during the entire year, the rain falls for 113.4 days and collects up to 36" (914.9mm) of precipitation.

Snowfall

In May, in Des Moines, it doesn't snow. April is the latest month when it typically snows. In Des Moines, during the entire year, snow aggregates up to 35.3" (896.7mm).

Daylight

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

Sunshine

The average sunshine in Des Moines is 8.9h.

UV index

The average daily maximum UV index in Des Moines is 8. A UV Index estimate of 8 to 10 represents a very high health risk from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 8 in May interpret into the following advice:
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. 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.

What is the temperature in May in Des Moines?

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

What is the least humid month in Des Moines?

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

What is the average humidity in May in Des Moines?

The average relative humidity in May in Des Moines, Iowa, is 63%.

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

In Des Moines, during May, the rain falls for 12.5 days and regularly aggregates up to 4.7" (120.4mm) of precipitation.

Does it snow in Des Moines in May?

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

What is the average length of the day in May in Des Moines?

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

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

In May, the average sunshine in Des Moines, Iowa, is 8.9h.

How high is the UV index in May in Des Moines?

The average daily maximum UV index in May is 8. A UV Index value of 8 to 10 symbolizes a very high hazard to health from the exposure to the Sun's UV radiation.
Average temperature in May - Des Moines, IA
  • Average high temperature in May: 22.4°C

The warmest month (with the highest average high temperature) is July (29.8°C).
The month with the lowest average high temperature is January (-0.6°C).

  • Average low temperature in May: 11.2°C

The month with the highest average low temperature is July (19.3°C).
The coldest month (with the lowest average low temperature) is January (-9.8°C).

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: 120.4mm

The wettest month (with the highest rainfall) is June (125.5mm).
The driest month (with the lowest rainfall) is January (25.4mm).

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: 0mm

The month with the highest snowfall is December (228.6mm).
Months with the lowest snowfall are May, June, July, August and September (0mm).

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).