May weather forecast
Downers Grove, IA

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Weather in May

The last month of the spring, May, is an agreeable month in Downers Grove, Iowa, with temperature in the range of an average low of 51.1°F (10.6°C) and an average high of 68.4°F (20.2°C).

Temperature

May's arrival sees a rise in the average high-temperature, jumping from April's moderate 56.1°F (13.4°C) to a pleasant 68.4°F (20.2°C). Nighttime temperatures in May average to a cool 51.1°F (10.6°C).

Humidity

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

Rainfall

The month with the most rainfall is May, when the rain falls for 18.6 days and typically aggregates up to 4.25" (108mm) of precipitation.

Snowfall

May through September are months without snowfall in Downers Grove.

Daylight

The average length of the day in May is 14h and 37min.
On the first day of May, sunrise is at 5:59 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 5:31 am and sunset at 8:34 pm CDT.

Sunshine

In Downers Grove, the average sunshine in May is 8.4h.

UV index

In Downers Grove, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: In May, a daily maximum UV index of 5 leads to the following instructions:
Prioritize safety - Suggestions to prevent sun damage are offered. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Updated: Aug 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Downers Grove in May?

In Downers Grove, 68.4°F (20.2°C) is the average high-temperature and 51.1°F (10.6°C) is the average low-temperature during May.

What is the average humidity in May?

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

What is the wettest month?

The month with the most rainfall is May, when the rain falls for 18.6 days and typically aggregates up to 4.25" (108mm) of precipitation.

How much does it rain in May?

In Downers Grove, Iowa, in May, during 18.6 rainfall days, 4.25" (108mm) of precipitation is typically accumulated.

When it does not snow?

In Downers Grove, snow does not fall in May through September.

Does it snow in May?

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

How many hours of daylight does Downers Grove have in May?

In Downers Grove, the average day length in May is 14h and 37min.

What time are sunrise and sunset in May?

In May, on the first day of the month, sunrise is at 5:59 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 5:31 am and sunset at 8:34 pm CDT.

How long on average sun shines in May?

The average sunshine duration in May is 8.4h.

What is the UV index reading in May?

The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium health risk from 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
Downers Grove, IA

Average temperature in May - Downers Grove, IA
  • Average high temperature in May: 68.4°F

The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (25.2°F).

  • Average low temperature in May: 51.1°F

The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (13.3°F).

Average pressure in May
Downers Grove, IA

Average pressure in May - Downers Grove, 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
Downers Grove, IA

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

The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).

Average humidity in May
Downers Grove, IA

Average humidity in May - Downers Grove, IA
  • Average humidity in May: 80%

The months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is October (74%).

Average rainfall in May
Downers Grove, IA

Average rainfall in May - Downers Grove, IA
  • Average rainfall in May: 4.25"

The wettest month (with the highest rainfall) is May (4.25").
The driest months (with the least rainfall) are January and February (1.26").

Average rainfall days in May
Downers Grove, IA

Average rainfall days in May - Downers Grove, IA
  • Average rainfall days in May: 18.6 days

The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is January (5.2 days).

Average snowfall in May
Downers Grove, IA

Average snowfall in May - Downers Grove, IA
  • Average snowfall in May: 0"

The month with the highest snowfall is January (5.04").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in May
Downers Grove, IA

Average snowfall days in May - Downers Grove, IA
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is January (12.1 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
Downers Grove, IA

Average daylight in May / Average sunshine in May - Downers Grove, 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 months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).

Average sunshine days in May
Downers Grove, IA

Average sunshine days in May - Downers Grove, IA
  • Average sunshine days in May: 10.6 days

The month with the most sunshine days is September (17 days).
The month with the least sunshine days is June (10.5 days).

Average UV index in May
Downers Grove, IA

Average UV index in May - Downers Grove, IA
  • Average UV index in May: 5

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

Average cloud cover in May
Downers Grove, IA

Average cloud cover in May - Downers Grove, IA
  • Average cloud cover in May: 44

The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 30).

Average visibility in May
Downers Grove, IA

Average visibility in May - Downers Grove, 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).

Downers Grove, Iowa, USA

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