May weather forecast
Ames, IA

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Weather in May

May brings the full-fledged arrival of spring in Ames, with temperatures continuing their upward climb. The city enjoys an ample amount of sunshine, an average of 8.4 hours per day. Residents experience more wet days with rainfall hitting the highest mark of 4.09" (104mm) this month. It is the onset of a typical midwestern summer, setting the stage for more sunny days ahead. Despite the slightly higher humidity of 76%, the city remains comfortable due to the moderate temperatures and the ample sunshine.

Temperature

A shift in the average high-temperature is noticeable in May, changing from a refreshing 58.5°F (14.7°C) in April to an agreeable 69.3°F (20.7°C). Nighttime temperature experiences an average drop to a fresh 53.1°F (11.7°C) in May.

Humidity

The average relative humidity in May is 76%.

Rainfall

May is the month with the most rainfall in Ames. Rain falls for 17.2 days and accumulates 4.09" (104mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows in Ames. During 0.2 snowfall days, in May, Ames aggregates 0.35" (9mm) of snow. In Ames, during the entire year, snow falls for 36.2 days and aggregates up to 15.43" (392mm) of snow.

Daylight

The average length of the day in May in Ames is 14h and 35min.
On the first day of May, sunrise is at 6:09 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 5:41 am and sunset at 8:43 pm CDT.

Sunshine

The average sunshine in May is 8.4h.

UV index

The average daily maximum UV index in May in Ames is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.
Note: In May, the maximum UV index of 5 suggests these recommendations:
Undertake protective steps - Preventing sun damage is advised. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
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Frequently asked questions

What are May temperatures in Ames?

The high-temperature, in May, in Ames, is 69.3°F (20.7°C), while the low-temperature averages to 53.1°F (11.7°C).

What is the average humidity in May in Ames?

The average relative humidity in May in Ames is 76%.

What is the wettest month in Ames?

May is the month with the most rainfall in Ames. Rain falls for 17.2 days and accumulates 4.09" (104mm) of precipitation.

How many days does it rain in May in Ames?

In May, the rain falls for 17.2 days. Throughout May, 4.09" (104mm) of precipitation is accumulated.

What is the last month it snows in Ames?

May is the last month it regularly snows. During 0.2 snowfall days, in May, Ames aggregates 0.35" (9mm) of snow.

How many hours of daylight does Ames have in May?

In May, the average day length in Ames, Iowa, is 14h and 35min.

When are sunrise and sunset in May in Ames?

On the first day of May in Ames, sunrise is at 6:09 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 5:41 am and sunset at 8:43 pm CDT.

How long on average sun shines in May in Ames?

In Ames, Iowa, the average sunshine duration in May is 8.4h.

How high is the UV index in May in Ames?

In May, the average daily maximum UV index in Ames is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to 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
Ames, IA

Average temperature in May - Ames, IA
  • Average high temperature in May: 69.3°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (26.6°F).

  • Average low temperature in May: 53.1°F

The month with the highest average low temperature is July (64.6°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).

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Average pressure in May
Ames, IA

Average pressure in May - Ames, 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
Ames, IA

Average wind speed in May - Ames, IA
  • Average wind speed in May: 9.1mph

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

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Average humidity in May
Ames, IA

Average humidity in May - Ames, IA
  • Average humidity in May: 76%

The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in May
Ames, IA

Average rainfall in May - Ames, IA
  • Average rainfall in May: 4.09"

The wettest month (with the highest rainfall) is May (4.09").
The driest month (with the least rainfall) is January (0.94").

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Average rainfall days in May
Ames, IA

Average rainfall days in May - Ames, IA
  • Average rainfall days in May: 17.2 days

The month with the highest number of rainy days is June (18 days).
The month with the least rainy days is February (3.3 days).

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Average snowfall in May
Ames, IA

Average snowfall in May - Ames, IA
  • Average snowfall in May: 0.35"

The month with the highest snowfall is January (4.06").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Ames, IA

Average snowfall days in May - Ames, IA
  • Average snowfall days in May: 0.2 days

The month with the highest number of snowfall days is January (9.1 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
Ames, IA

Average daylight in May / Average sunshine in May - Ames, IA
  • Average daylight in May: 14h and 4min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in May: 8h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).

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Average sunshine days in May
Ames, IA

Average sunshine days in May - Ames, IA
  • Average sunshine days in May: 11.3 days

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is June (10.4 days).

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Average UV index in May
Ames, IA

Average UV index in May - Ames, IA
  • Average UV index in May: 5

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

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Average cloud cover in May
Ames, IA

Average cloud cover in May - Ames, IA
  • Average cloud cover in May: 43

The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 31).

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Average visibility in May
Ames, IA

Average visibility in May - Ames, IA
  • Average visibility in May: 6mi

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

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Ames, Iowa, USA

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