May weather forecast
Spring Grove, IL

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Weather in May

The last month of the spring, May, is an enjoyable month in Spring Grove, Illinois, with an average temperature fluctuating between 65.1°F (18.4°C) and 48.7°F (9.3°C).

Temperature

The arrival of May brings a change in Spring Grove's weather, with average high-temperatures moving from April's cool 53.2°F (11.8°C) to a comfortable 65.1°F (18.4°C). An average temperature of 48.7°F (9.3°C) marks the nights in May.

Humidity

In May, the average relative humidity is 80%.

Rainfall

In Spring Grove, in May, during 17.1 rainfall days, 3.03" (77mm) of precipitation is typically accumulated. Throughout the year, in Spring Grove, there are 139.6 rainfall days, and 26.18" (665mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. May is the last month it regularly snows in Spring Grove. During 0.3 snowfall days, in May, Spring Grove aggregates 0.08" (2mm) of snow. Throughout the year, in Spring Grove, there are 38.2 snowfall days, and 15.59" (396mm) of snow is accumulated.

Daylight

In Spring Grove, Illinois, the average length of the day in May is 14h and 37min.
On the first day of May, sunrise is at 5:46 am and sunset at 7:53 pm. On the last day of the month, sunrise is at 5:18 am and sunset at 8:23 pm CDT.

Sunshine

The average sunshine in May in Spring Grove is 8.3h.

UV index

The months with the highest UV index in Spring Grove, Illinois, are May through August, with an average maximum UV index of 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.
Note: A typical high UV index of 5 in May suggests the following recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Be vigilant! The reflective nature of snow can increase the Sun's UV radiation nearly twofold.
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Frequently asked questions

What is the average May temperature in Spring Grove?

May temperatures in Spring Grove, Illinois, vary between a high-temperature of 65.1°F (18.4°C) and a low-temperature of 48.7°F (9.3°C).

What is the average humidity in May in Spring Grove?

The average relative humidity in May in Spring Grove is 80%.

How much does it rain in Spring Grove in May?

In Spring Grove, Illinois, in May, it is raining for 17.1 days, with typically 3.03" (77mm) of accumulated precipitation.

What is the last month it snows in Spring Grove?

May is the last month it regularly snows in Spring Grove, Illinois. During 0.3 snowfall days, in May, Spring Grove aggregates 0.08" (2mm) of snow.

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

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

What time are sunrise and sunset in May in Spring Grove?

In May, on the first day of the month, sunrise is at 5:46 am and sunset at 7:53 pm. On the last day of the month, in Spring Grove, sunrise is at 5:18 am and sunset at 8:23 pm CDT.

How many hours of sunshine does Spring Grove have in May?

In May, the average sunshine duration in Spring Grove is 8.3h.

What is the month with the highest UV index in Spring Grove?

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

What is the UV index reading in May in Spring Grove?

The average daily maximum UV index in May in Spring Grove 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 days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Spring Grove, IL

Average temperature in May - Spring Grove, IL
  • Average high temperature in May: 65.1°F

The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (26.2°F).

  • Average low temperature in May: 48.7°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).

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Average pressure in May
Spring Grove, IL

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

The months with the highest atmospheric pressure are January and February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in May
Spring Grove, IL

Average wind speed in May - Spring Grove, IL
  • Average wind speed in May: 8.5mph

The windiest months (with the highest average wind speed) are January and February (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.4mph).

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Average humidity in May
Spring Grove, IL

Average humidity in May - Spring Grove, IL
  • Average humidity in May: 80%

The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is October (76%).

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Average rainfall in May
Spring Grove, IL

Average rainfall in May - Spring Grove, IL
  • Average rainfall in May: 3.03"

The wettest month (with the highest rainfall) is June (3.54").
The driest month (with the least rainfall) is December (1.06").

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Average rainfall days in May
Spring Grove, IL

Average rainfall days in May - Spring Grove, IL
  • Average rainfall days in May: 17.1 days

The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is February (3.4 days).

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Average snowfall in May
Spring Grove, IL

Average snowfall in May - Spring Grove, IL
  • Average snowfall in May: 0.08"

The month with the highest snowfall is January (4.33").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in May
Spring Grove, IL

Average snowfall days in May - Spring Grove, IL
  • Average snowfall days in May: 0.3 days

The month with the highest number of snowfall days is January (10.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in May /
Average sunshine in May
Spring Grove, IL

Average daylight in May / Average sunshine in May - Spring Grove, IL
  • 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 2min

The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The months with the least sunshine are January and February (Average sunshine: 3h and 36min).

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Average sunshine days in May
Spring Grove, IL

Average sunshine days in May - Spring Grove, IL
  • Average sunshine days in May: 11.1 days

The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is July (9.9 days).

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Average UV index in May
Spring Grove, IL

Average UV index in May - Spring Grove, IL
  • 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 and December (UV index 1).

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Average cloud cover in May
Spring Grove, IL

Average cloud cover in May - Spring Grove, IL
  • Average cloud cover in May: 44

The month with the most cloud cover is January (Cloud cover 63).
The months with the least cloud cover are July, August and September (Cloud cover 32).

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Average visibility in May
Spring Grove, IL

Average visibility in May - Spring Grove, 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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Spring Grove, Illinois, USA

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