May weather forecast
Delaware, IA

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Weather in May

May, the last month of the spring in Delaware, is a comfortable month, with an average temperature fluctuating between 66.9°F (19.4°C) and 50.5°F (10.3°C).

Temperature

May sees a rise in the average high-temperature, climbing from a mild 55.8°F (13.2°C) in April to a comfortable 66.9°F (19.4°C). Nighttime temperature lowers to an average of 50.5°F (10.3°C) in May.

Humidity

In May, the average relative humidity is 80%.

Rainfall

May is the month with the most rainfall. Rain falls for 14.9 days and accumulates 2.13" (54mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

In Delaware, the average length of the day in May is 14h and 38min.
On the first day of May, sunrise is at 5:59 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 5:30 am and sunset at 8:35 pm CDT.

Sunshine

In May, the average sunshine in Delaware is 8.1h.

UV index

May through August, with an average maximum UV index of 5, are months with the highest UV index. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.
Note: A maximum high UV index of 5 in May translates into the following recommendations:
Exercise care. People with light skin might get burns in fewer than 30 minutes. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.

Frequently asked questions

What is the average May temperature in Delaware?

Delaware in May has an average high-temperature of 66.9°F (19.4°C) and an average low-temperature of 50.5°F (10.3°C).

What is the average humidity in May?

In Delaware, the average relative humidity in May is 80%.

What is the rainiest month?

May is the month with the most rainfall. Rain falls for 14.9 days and accumulates 2.13" (54mm) of precipitation.

How much does it rain in May?

In May, the rain falls for 14.9 days. Throughout May, 2.13" (54mm) of precipitation is accumulated.

When it does not snow?

May through September are months without snowfall.

Does it snow in May?

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

What is the average length of the day in May?

The average day length in May is 14h and 38min.

When are sunrise and sunset in May?

On the first day of May, sunrise is at 5:59 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 5:30 am and sunset at 8:35 pm CDT.

How many hours of sunshine does Delaware have in May?

In May, the average sunshine duration is 8.1h.

What are the months with the highest UV index?

May through August, with an average maximum UV index of 5, are months with the highest UV index.

What is the UV index intensity in May?

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

Average temperature in May
Delaware, IA

Average temperature in May - Delaware, IA
  • Average high temperature in May: 66.9°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 (24.3°F).

  • Average low temperature in May: 50.5°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (11.7°F).

Average pressure in May
Delaware, IA

Average pressure in May - Delaware, IA
  • Average pressure in May: 29.94"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in May
Delaware, IA

Average wind speed in May - Delaware, IA
  • Average wind speed in May: 9.3mph

The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

Average humidity in May
Delaware, IA

Average humidity in May - Delaware, IA
  • Average humidity in May: 80%

The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are April and October (75%).

Average rainfall in May
Delaware, IA

Average rainfall in May - Delaware, IA
  • Average rainfall in May: 2.13"

The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is December (0.47").

Average rainfall days in May
Delaware, IA

Average rainfall days in May - Delaware, IA
  • Average rainfall days in May: 14.9 days

The month with the highest number of rainy days is June (15.4 days).
The month with the least rainy days is February (2.6 days).

Average snowfall in May
Delaware, IA

Average snowfall in May - Delaware, IA
  • Average snowfall in May: 0"

The month with the highest snowfall is January (2.13").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in May
Delaware, IA

Average snowfall days in May - Delaware, IA
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in May /
Average sunshine in May
Delaware, IA

Average daylight in May / Average sunshine in May - Delaware, 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 6min).

  • Average sunshine in May: 8h and 1min

The months with the most sunshine are July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

Average sunshine days in May
Delaware, IA

Average sunshine days in May - Delaware, IA
  • Average sunshine days in May: 12.9 days

The month with the most sunshine days is December (19.7 days).
The month with the least sunshine days is June (11.7 days).

Average UV index in May
Delaware, IA

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

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).

Average cloud cover in May
Delaware, IA

Average cloud cover in May - Delaware, IA
  • Average cloud cover in May: 46

The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are August and September (Cloud cover 33).

Average visibility in May
Delaware, IA

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

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

Delaware, Iowa, USA

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