May weather forecast
Bismarck, IL

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Weather in May

The last month of the spring, May, is an agreeable month in Bismarck, Illinois, with an average temperature ranging between max 71.8°F (22.1°C) and min 55°F (12.8°C).

Temperature

As Bismarck enters May, the average high-temperature increases from the an enjoyable 61.2°F (16.2°C) of April to an agreeable 71.8°F (22.1°C). Bismarck records a mean low-temperature of 55°F (12.8°C) in May.

Humidity

In Bismarck, the average relative humidity in May is 78%.

Rainfall

In Bismarck, during May, the rain falls for 18 days and regularly aggregates up to 3.15" (80mm) of precipitation. Throughout the year, in Bismarck, there are 151.8 rainfall days, and 25.63" (651mm) of precipitation is accumulated.

Snowfall

May through October are months without snowfall in Bismarck.

Daylight

In May, the average length of the day is 14h and 26min.
On the first day of the month, sunrise is at 5:48 am and sunset at 7:46 pm. On the last day of May, sunrise is at 5:22 am and sunset at 8:13 pm CDT.

Sunshine

In Bismarck, the average sunshine in May is 8.8h.

UV index

The average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum daily UV index, 5 in May, converts into the following recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Updated: Aug 18, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are May temperatures?

The average high-temperature, in May, in Bismarck, is 71.8°F (22.1°C), while the average low-temperature is 55°F (12.8°C).

What is the average humidity in May?

The average relative humidity in May in Bismarck is 78%.

How much does it rain in Bismarck in May?

In Bismarck, in May, during 18 rainfall days, 3.15" (80mm) of precipitation is typically accumulated.

When it does not snow?

May through October are months without snowfall.

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 Bismarck have in May?

The average day length in May is 14h and 26min.

What time are sunrise and sunset in May?

In May, on the first day of the month, sunrise is at 5:48 am and sunset at 7:46 pm. On the last day of the month, sunrise is at 5:22 am and sunset at 8:13 pm CDT.

How many hours of sunshine does Bismarck have in May?

In Bismarck, the average sunshine duration in May is 8.8h.

What is the UV index intensity in May?

The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to UV radiation.
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
Bismarck, IL

Average temperature in May - Bismarck, IL
  • Average high temperature in May: 71.8°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 (31.6°F).

  • Average low temperature in May: 55°F

The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).

Average pressure in May
Bismarck, IL

Average pressure in May - Bismarck, IL
  • Average pressure in May: 29.96"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in May
Bismarck, IL

Average wind speed in May - Bismarck, IL
  • Average wind speed in May: 8.6mph

The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).

Average humidity in May
Bismarck, IL

Average humidity in May - Bismarck, IL
  • Average humidity in May: 78%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).

Average rainfall in May
Bismarck, IL

Average rainfall in May - Bismarck, IL
  • Average rainfall in May: 3.15"

The wettest month (with the highest rainfall) is April (3.23").
The driest months (with the least rainfall) are February and September (1.38").

Average rainfall days in May
Bismarck, IL

Average rainfall days in May - Bismarck, IL
  • Average rainfall days in May: 18 days

The month with the highest number of rainy days is May (18 days).
The month with the least rainy days is February (6.6 days).

Average snowfall in May
Bismarck, IL

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

The month with the highest snowfall is February (2.64").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in May
Bismarck, IL

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

The month with the highest number of snowfall days is January (10.6 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
Bismarck, IL

Average daylight in May / Average sunshine in May - Bismarck, IL
  • Average daylight in May: 14h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in May: 8h and 5min

The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).

Average sunshine days in May
Bismarck, IL

Average sunshine days in May - Bismarck, IL
  • Average sunshine days in May: 10 days

The month with the most sunshine days is November (18 days).
The month with the least sunshine days is July (9.5 days).

Average UV index in May
Bismarck, IL

Average UV index in May - Bismarck, IL
  • Average UV index in May: 5

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

Average cloud cover in May
Bismarck, IL

Average cloud cover in May - Bismarck, IL
  • Average cloud cover in May: 41

The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are June, August and September (Cloud cover 32).

Average visibility in May
Bismarck, IL

Average visibility in May - Bismarck, IL
  • Average visibility in May: 6mi

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

Bismarck, Illinois, USA

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