May weather forecast
Otterville, IL

Weather in May

The last month of the spring, May, is a moderately hot month in Otterville, Illinois, with an average temperature fluctuating between 73.9°F (23.3°C) and 56.7°F (13.7°C).

Temperature

In Otterville, the average high-temperature in May increases from a comfortable 64.2°F (17.9°C) in April to a warm 73.9°F (23.3°C). In Otterville, the average low-temperature is 56.7°F (13.7°C).

Humidity

In May, the average relative humidity in Otterville, Illinois, is 79%.

Rainfall

In May, in Otterville, the rain falls for 16.5 days. Throughout May, 2.68" (68mm) of precipitation is accumulated. In Otterville, Illinois, during the entire year, the rain falls for 136.5 days and collects up to 23.11" (587mm) of precipitation.

Snowfall

In Otterville, snow does not fall in April through October.

Daylight

In May, the average length of the day is 14h and 20min.
On the first day of the month, sunrise is at 6:02 am and sunset at 7:54 pm. On the last day of May, in Otterville, sunrise is at 5:37 am and sunset at 8:20 pm CDT.

Sunshine

In Otterville, the average sunshine in May is 9.3h.

UV index

The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: In May, the average maximum UV index of 6 translate into the following recommendations:
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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in May in Otterville?

In May, the average high-temperature is 73.9°F (23.3°C), and the average low-temperature is 56.7°F (13.7°C).

What is the average humidity in May in Otterville?

The average relative humidity in May is 79%.

How many days does it rain in May in Otterville?

In Otterville, during May, the rain falls for 16.5 days and regularly aggregates up to 2.68" (68mm) of precipitation.

When it does not snow in Otterville?

In Otterville, Illinois, snow does not fall in April through October.

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

The average day length in May in Otterville is 14h and 20min.

What time are sunrise and sunset in May in Otterville?

On the first day of May in Otterville, Illinois, sunrise is at 6:02 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 5:37 am and sunset at 8:20 pm CDT.

How many hours of sunshine does Otterville have in May?

In Otterville, Illinois, the average sunshine duration in May is 9.3h.

What is the month with the highest UV index in Otterville?

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

How high is the UV index in May in Otterville?

In Otterville, the average daily maximum UV index in May is 6. A UV Index value of 6 to 7 symbolizes a high health vulnerability from exposure to Sun's UV rays.
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
Otterville, IL

Average temperature in May - Otterville, IL
  • Average high temperature in May: 73.9°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (35.6°F).

  • Average low temperature in May: 56.7°F

The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (22.6°F).

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Average pressure in May
Otterville, IL

Average pressure in May - Otterville, IL
  • Average pressure in May: 29.95"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in May
Otterville, IL

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

The windiest months (with the highest average wind speed) are January and February (9.6mph).
The calmest month (with the lowest average wind speed) is July (5.7mph).

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Average humidity in May
Otterville, IL

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

The month with the highest relative humidity is July (80%).
The month with the lowest relative humidity is October (71%).

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Average rainfall in May
Otterville, IL

Average rainfall in May - Otterville, IL
  • Average rainfall in May: 2.68"

The wettest month (with the highest rainfall) is June (3.07").
The driest month (with the least rainfall) is January (1.06").

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Average rainfall days in May
Otterville, IL

Average rainfall days in May - Otterville, IL
  • Average rainfall days in May: 16.5 days

The month with the highest number of rainy days is May (16.5 days).
The month with the least rainy days is January (5.9 days).

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Average snowfall in May
Otterville, IL

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

The month with the highest snowfall is February (2.17").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in May
Otterville, IL

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

The month with the highest number of snowfall days is January (6.2 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
Otterville, IL

Average daylight in May / Average sunshine in May - Otterville, IL
  • Average daylight in May: 14h and 20min

The month with the longest days is June (Average daylight: 14h and 52min).
The month with the shortest days is December (Average daylight: 9h and 29min).

  • Average sunshine in May: 9h and 18min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).

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Average sunshine days in May
Otterville, IL

Average sunshine days in May - Otterville, IL
  • Average sunshine days in May: 12.3 days

The month with the most sunshine days is January (20.3 days).
The months with the least sunshine days are May and June (12.3 days).

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Average UV index in May
Otterville, IL

Average UV index in May - Otterville, 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, November and December (UV index 2).

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Average cloud cover in May
Otterville, IL

Average cloud cover in May - Otterville, IL
  • Average cloud cover in May: 38

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

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Average visibility in May
Otterville, IL

Average visibility in May - Otterville, 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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