May weather forecast
Marion, IL

Weather in May

The last month of the spring, May, is a moderately hot month in Marion, Illinois, with an average temperature ranging between max 75.4°F (24.1°C) and min 58.1°F (14.5°C).

Temperature

In May, the average high-temperature rises from an enjoyable 66.4°F (19.1°C) in April to a warm 75.4°F (24.1°C). In May, the average low-temperature is 58.1°F (14.5°C).

Humidity

The most humid month is May, with an average relative humidity of 79%.

Rainfall

In Marion, Illinois, during May, the rain falls for 15.1 days and regularly aggregates up to 2.52" (64mm) of precipitation. In Marion, during the entire year, the rain falls for 137.6 days and collects up to 23.03" (585mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

The average length of the day in May in Marion, Illinois, is 14h and 13min.
On the first day of May in Marion, sunrise is at 5:59 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 5:35 am and sunset at 8:10 pm CDT.

Sunshine

The average sunshine in May is 9.2h.

UV index

May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 6 in May transform into the following instructions:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in May in Marion?

In May, in Marion, the average high-temperature is 75.4°F (24.1°C), and the average low-temperature is 58.1°F (14.5°C).

What is the most humid month in Marion?

May is the most humid month in Marion, Illinois, with an average relative humidity of 79%.

What is the average humidity in May in Marion?

In May, the average relative humidity is 79%.

How many days does it rain in May in Marion?

In May, in Marion, the rain falls for 15.1 days. Throughout May, 2.52" (64mm) of precipitation is accumulated.

When it does not snow in Marion?

May through September are months without snowfall in Marion, Illinois.

Does it snow in Marion in May?

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

What is the average length of the day in May in Marion?

In May, the average day length is 14h and 13min.

What time are sunrise and sunset in May in Marion?

On the first day of May in Marion, Illinois, sunrise is at 5:59 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 5:35 am and sunset at 8:10 pm CDT.

How many hours of sunshine does Marion have in May?

In May, the average sunshine duration in Marion is 9.2h.

When is the highest UV index in Marion?

May through August, with an average maximum UV index of 6, are months with the highest UV index in Marion.

How high is the UV index in May in Marion?

The average daily maximum UV index in May is 6. A UV Index estimate of 6 to 7 represents a high health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Marion, IL

Average temperature in May - Marion, IL
  • Average high temperature in May: 75.4°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (39.6°F).

  • Average low temperature in May: 58.1°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).

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Average pressure in May
Marion, IL

Average pressure in May - Marion, IL
  • Average pressure in May: 29.97"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in May
Marion, IL

Average wind speed in May - Marion, IL
  • Average wind speed in May: 7.6mph

The windiest months (with the highest average wind speed) are January and February (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

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Average humidity in May
Marion, IL

Average humidity in May - Marion, IL
  • Average humidity in May: 79%

The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in May
Marion, IL

Average rainfall in May - Marion, IL
  • Average rainfall in May: 2.52"

The wettest month (with the highest rainfall) is April (3.11").
The driest month (with the least rainfall) is September (1.1").

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Average rainfall days in May
Marion, IL

Average rainfall days in May - Marion, IL
  • Average rainfall days in May: 15.1 days

The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is November (7.8 days).

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Average snowfall in May
Marion, IL

Average snowfall in May - Marion, IL
  • Average snowfall in May: 0"

The months with the highest snowfall are January and February (0.94").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in May
Marion, IL

Average snowfall days in May - Marion, IL
  • Average snowfall days in May: 0 days

The month with the highest number of snowfall days is February (4.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Marion, IL

Average daylight in May / Average sunshine in May - Marion, IL
  • Average daylight in May: 14h and 13min

The month with the longest days is June (Average daylight: 14h and 44min).
The month with the shortest days is December (Average daylight: 9h and 37min).

  • Average sunshine in May: 9h and 12min

The months with the most sunshine are June and July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

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Average sunshine days in May
Marion, IL

Average sunshine days in May - Marion, IL
  • Average sunshine days in May: 13.3 days

The month with the most sunshine days is October (20.6 days).
The month with the least sunshine days is July (12.9 days).

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Average UV index in May
Marion, IL

Average UV index in May - Marion, IL
  • Average UV index in May: 6

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).

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Average cloud cover in May
Marion, IL

Average cloud cover in May - Marion, IL
  • Average cloud cover in May: 39

The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are June, August and September (Cloud cover 28).

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Average visibility in May
Marion, IL

Average visibility in May - Marion, IL
  • 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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