October weather forecast and climate
Decatur, MI

Weather in October

October, the same as September, in Decatur, Michigan, is another mild autumn month, with average temperature varying between 45°F (7.2°C) and 59.5°F (15.3°C).

Temperature

In Decatur, the average high-temperature decreases, from an agreeable 72.7°F (22.6°C) in September, to a moderate 59.5°F (15.3°C). The average low-temperature, is 45°F (7.2°C).

Humidity

April and October, with an average relative humidity of 77%, are the least humid months in Decatur.

Rainfall

In October, in Decatur, the rain falls for 15.3 days. Throughout October, 2.32" (59mm) of precipitation is accumulated. Throughout the year, in Decatur, there are 139.4 rainfall days, and 20" (508mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Decatur are January through May, October through December. October is the first month it typically snows. Throughout October, in the average 0.5 snowfall days, it receives 0.2" (5mm) of snow. Throughout the year, in Decatur, there are 63 snowfall days, and 14.45" (367mm) of snow is accumulated.

Daylight

In Decatur, the average length of the day in October is 11h.

Sunshine

The average sunshine in Decatur, Michigan, is 5.6h.

UV index

In Decatur, the average daily maximum UV index in October is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 2 in October interpret into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in October in Decatur?

The average high-temperature, in October, is 59.5°F (15.3°C), while the average low-temperature is 45°F (7.2°C).

What is the least humid month in Decatur?

April and October, with an average relative humidity of 77%, are the least humid months in Decatur.

What is the average humidity in October in Decatur?

In Decatur, Michigan, the average relative humidity in October is 77%.

How much does it rain in Decatur in October?

In Decatur, in October, it is raining for 15.3 days, with typically 2.32" (59mm) of accumulated precipitation.

When does it start to snow in Decatur?

October is the first month it typically snows in Decatur, Michigan. Throughout October, in the average 0.5 snowfall days, it receives 0.2" (5mm) of snow.

What is the average length of the day in October in Decatur?

In October, the average length of the day is 11h.

How long on average sun shines in October in Decatur?

In Decatur, the average sunshine in October is 5.6h.

What is the UV index reading in October in Decatur?

The average daily maximum UV index in October is 2. A UV Index reading of 2, and below, represents a low health threat from unsafe exposure to the Sun's UV rays.

Average temperature in October
Decatur, MI

Average temperature in October - Decatur, MI
  • Average high temperature in October: 59.5°F

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (28.9°F).

  • Average low temperature in October: 45°F

The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (18.9°F).

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Average pressure in October
Decatur, MI

Average pressure in October - Decatur, MI
  • Average pressure in October: 30"

Months with the highest atmospheric pressure are January, March and November (30.09").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in October
Decatur, MI

Average wind speed in October - Decatur, MI
  • Average wind speed in October: 8.9mph

The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).

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Average humidity in October
Decatur, MI

Average humidity in October - Decatur, MI
  • Average humidity in October: 77%

The month with the highest relative humidity is January (87%).
Months with the lowest relative humidity are April and October (77%).

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Average rainfall in October
Decatur, MI

Average rainfall in October - Decatur, MI
  • Average rainfall in October: 2.32"

The wettest month (with the highest rainfall) is June (2.6").
The driest month (with the least rainfall) is February (0.98").

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Average rainfall days in October
Decatur, MI

Average rainfall days in October - Decatur, MI
  • Average rainfall days in October: 15.3 days

The month with the highest number of rainy days is May (15.4 days).
The month with the least rainy days is February (4.8 days).

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Average snowfall in October
Decatur, MI

Average snowfall in October - Decatur, MI
  • Average snowfall in October: 0.2"

The month with the highest snowfall is January (4.29").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in October
Decatur, MI

Average snowfall days in October - Decatur, MI
  • Average snowfall days in October: 0.5 days

The month with the highest number of snowfall days is January (17.6 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in October /
Average sunshine in October
Decatur, MI

Average daylight in October / Average sunshine in October - Decatur, MI
  • Average daylight in October: 11h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in October: 5.6h

The month with the most sunshine is July (Average sunshine: 10.2h).
The month with the least sunshine is January (Average sunshine: 2.6h).

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Average sunshine days in October
Decatur, MI

Average sunshine days in October - Decatur, MI
  • Average sunshine days in October: 13.2 days

The month with the most sunshine days is March (14.4 days).
The month with the least sunshine days is January (9.8 days).

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Average UV index in October
Decatur, MI

Average UV index in October - Decatur, MI
  • Average UV index in October: 2

Months with the highest UV index are June and August (UV index 6).
Months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in October
Decatur, MI

Average cloud cover in October - Decatur, MI
  • Average cloud cover in October: 48

The month with the most cloud cover is January (Cloud cover 75).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in October
Decatur, MI

Average visibility in October - Decatur, MI
  • Average visibility in October: 6mi

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

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