May weather forecast
Des Moines, IA

City buildings in Des Moines, Iowa
City buildings in Des Moines, Iowa

Weather in May

May, the last month of the spring in Des Moines, is an agreeable month, with temperature in the range of an average high of 69.6°F (20.9°C) and an average low of 53.1°F (11.7°C).

Temperature

In Des Moines, the average high-temperature in May rises from a mild 59.7°F (15.4°C) in April to an agreeable 69.6°F (20.9°C). In May, the average low-temperature is 53.1°F (11.7°C).

Humidity

The average relative humidity in May is 78%.

Rainfall

The month with the most rainfall in Des Moines is May, when the rain falls for 15.3 days and typically aggregates up to 2.76" (70mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows in Des Moines. During 0.2 snowfall days, Des Moines aggregates 0.08" (2mm) of snow. Throughout the year, in Des Moines, Iowa, there are 30.9 snowfall days, and 7.36" (187mm) of snow is accumulated.

Daylight

In May, the average length of the day is 14h and 33min.
On the first day of May in Des Moines, sunrise is at 6:10 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 5:43 am and sunset at 8:41 pm CDT.

Sunshine

The average sunshine in May is 8.6h.

UV index

In May, the average daily maximum UV index in Des Moines is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The average daily UV index of 5 in May transform into the following instructions:
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 temperature in May in Des Moines?

In Des Moines, in May, the average high-temperature is 69.6°F (20.9°C), and the average low-temperature is 53.1°F (11.7°C).

What is the average humidity in May in Des Moines?

In Des Moines, Iowa, the average relative humidity in May is 78%.

What is the wettest month in Des Moines?

May is the month with the most rainfall. Rain falls for 15.3 days and accumulates 2.76" (70mm) of precipitation.

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

In Des Moines, in May, it is raining for 15.3 days, with typically 2.76" (70mm) of accumulated precipitation.

What is the last month it snows in Des Moines?

May is the last month it regularly snows in Des Moines. During 0.2 snowfall days, in May, Des Moines aggregates 0.08" (2mm) of snow.

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

The average day length in May is 14h and 33min.

When is the sunrise / sunset in May in Des Moines?

On the first day of May in Des Moines, sunrise is at 6:10 am and sunset at 8:12 pm. On the last day of the month, sunrise is at 5:43 am and sunset at 8:41 pm CDT.

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

In Des Moines, Iowa, the average sunshine duration in May is 8.6h.

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

In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Des Moines, IA

Average temperature in May - Des Moines, IA
  • Average high temperature in May: 69.6°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (28.2°F).

  • Average low temperature in May: 53.1°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).

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Average pressure in May
Des Moines, IA

Average pressure in May - Des Moines, IA
  • Average pressure in May: 29.93"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).

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Average wind speed in May
Des Moines, IA

Average wind speed in May - Des Moines, IA
  • Average wind speed in May: 8.8mph

The windiest months (with the highest average wind speed) are January, February, March and April (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).

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Average humidity in May
Des Moines, IA

Average humidity in May - Des Moines, IA
  • Average humidity in May: 78%

The months with the highest relative humidity are January and June (82%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in May
Des Moines, IA

Average rainfall in May - Des Moines, IA
  • Average rainfall in May: 2.76"

The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is January (0.47").

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Average rainfall days in May
Des Moines, IA

Average rainfall days in May - Des Moines, IA
  • Average rainfall days in May: 15.3 days

The month with the highest number of rainy days is June (15.9 days).
The month with the least rainy days is February (3 days).

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Average snowfall in May
Des Moines, IA

Average snowfall in May - Des Moines, IA
  • Average snowfall in May: 0.08"

The month with the highest snowfall is January (2.24").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Des Moines, IA

Average snowfall days in May - Des Moines, IA
  • Average snowfall days in May: 0.2 days

The month with the highest number of snowfall days is January (8.7 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
Des Moines, IA

Average daylight in May / Average sunshine in May - Des Moines, IA
  • Average daylight in May: 14h and 33min

The month with the longest days is June (Average daylight: 15h and 8min).
The month with the shortest days is December (Average daylight: 9h and 13min).

  • Average sunshine in May: 8h and 36min

The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

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Average sunshine days in May
Des Moines, IA

Average sunshine days in May - Des Moines, IA
  • Average sunshine days in May: 12.4 days

The month with the most sunshine days is December (22.3 days).
The month with the least sunshine days is June (12.2 days).

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Average UV index in May
Des Moines, IA

Average UV index in May - Des Moines, IA
  • Average UV index in May: 5

The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).

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Average cloud cover in May
Des Moines, IA

Average cloud cover in May - Des Moines, IA
  • Average cloud cover in May: 41

The month with the most cloud cover is January (Cloud cover 54).
The months with the least cloud cover are July and September (Cloud cover 29).

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Average visibility in May
Des Moines, IA

Average visibility in May - Des Moines, IA
  • Average visibility in May: 6mi

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

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