November weather forecast
Decatur, IL

Weather in November

November, the last month of the autumn, in Decatur, is another chilly month, with average temperature varying between 49.8°F (9.9°C) and 36.1°F (2.3°C).

Temperature

In Decatur, Illinois, the average high-temperature drops, from an enjoyable 64°F (17.8°C) in October, to a chilly 49.8°F (9.9°C). In Decatur, the average low-temperature is 36.1°F (2.3°C).

Humidity

The average relative humidity in November is 73%.

Rainfall

In Decatur, during November, the rain falls for 8.4 days and regularly aggregates up to 0.94" (24mm) of precipitation. In Decatur, during the entire year, the rain falls for 130.2 days and collects up to 16.34" (415mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall in Decatur. November is the first month it typically snows. Throughout November, in the average 1.6 snowfall days, it receives 0.24" (6mm) of snow. Throughout the year, there are 23.1 snowfall days, and 5.67" (144mm) of snow is accumulated.

Daylight

The average length of the day in Decatur is 10h.

Sunshine

The average sunshine in Decatur, Illinois, is 5.4h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to the UV radiation for the ordinary person.
Note: In November, the average maximum UV index of 2 translate into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in November in Decatur?

The average relative humidity in November in Decatur is 73%.

How much does it rain in Decatur in November?

In November, in Decatur, Illinois, the rain falls for 8.4 days. Throughout November, 0.94" (24mm) of precipitation is accumulated.

When does it start to snow in Decatur?

November is the first month it typically snows in Decatur. Throughout November, in the average 1.6 snowfall days, it receives 0.24" (6mm) of snow.

How many hours of daylight does Decatur have in November?

The average length of the day in November in Decatur, Illinois, is 10h.

How long on average sun shines in November in Decatur?

In Decatur, Illinois, the average sunshine in November is 5.4h.

When is the lowest UV index in Decatur?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index.

How high is the UV index in November in Decatur?

In November, the average daily maximum UV index in Decatur, Illinois, is 2. A UV Index value of 2, and less, symbolizes a low health threat from unprotected exposure to the UV radiation.

Average temperature in November
Decatur, IL

Average temperature in November - Decatur, IL
  • Average high temperature in November: 49.8°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.9°F).

  • Average low temperature in November: 36.1°F

The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).

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Average pressure in November
Decatur, IL

Average pressure in November - Decatur, IL
  • Average pressure in November: 30.12"

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

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Average wind speed in November
Decatur, IL

Average wind speed in November - Decatur, IL
  • Average wind speed in November: 10.1mph

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).

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Average humidity in November
Decatur, IL

Average humidity in November - Decatur, IL
  • Average humidity in November: 73%

The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (70%).

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Average rainfall in November
Decatur, IL

Average rainfall in November - Decatur, IL
  • Average rainfall in November: 0.94"

The wettest month (with the highest rainfall) is May (2.01").
The driest months (with the least rainfall) are February and December (0.87").

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Average rainfall days in November
Decatur, IL

Average rainfall days in November - Decatur, IL
  • Average rainfall days in November: 8.4 days

The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is February (5.8 days).

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Average snowfall in November
Decatur, IL

Average snowfall in November - Decatur, IL
  • Average snowfall in November: 0.24"

The month with the highest snowfall is January (1.85").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in November
Decatur, IL

Average snowfall days in November - Decatur, IL
  • Average snowfall days in November: 1.6 days

The month with the highest number of snowfall days is January (7.2 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in November /
Average sunshine in November
Decatur, IL

Average daylight in November / Average sunshine in November - Decatur, IL
  • Average daylight in November: 10h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in November: 5.4h

The month with the most sunshine is June (Average sunshine: 10.4h).
The month with the least sunshine is January (Average sunshine: 4.1h).

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Average sunshine days in November
Decatur, IL

Average sunshine days in November - Decatur, IL
  • Average sunshine days in November: 19.6 days

The month with the most sunshine days is October (19.8 days).
The month with the least sunshine days is May (11.5 days).

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Average UV index in November
Decatur, IL

Average UV index in November - Decatur, IL
  • Average UV index in November: 2

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

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Average cloud cover in November
Decatur, IL

Average cloud cover in November - Decatur, IL
  • Average cloud cover in November: 39

The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 29).

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Average visibility in November
Decatur, IL

Average visibility in November - Decatur, IL
  • Average visibility in November: 6mi

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

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