Climate and monthly weather forecast
Decatur, AL

Weather in January

January, like December, is another chilly winter month in Decatur, Alabama, with temperature in the range of an average low of 33.3°F (0.7°C) and an average high of 47.5°F (8.6°C). The coldest month is January, with an average high-temperature of 47.5°F (8.6°C) and an average low-temperature of 33.3°F (0.7°C). Weather in January »

Weather in February

The last month of the winter, February, is a cool month in Decatur, Alabama, with an average temperature fluctuating between 53.1°F (11.7°C) and 37.2°F (2.9°C). In February, the average high-temperature slightly increases from a chilly 47.5°F (8.6°C) in January to a cool 53.1°F (11.7°C). Weather in February »

Weather in March

March, the first month of the spring in Decatur, is a comfortable month, with an average temperature fluctuating between 61.3°F (16.3°C) and 44.2°F (6.8°C). In March, the average high-temperature marginally rises from a cool 53.1°F (11.7°C) in February to an enjoyable 61.3°F (16.3°C). Weather in March »

Weather in April

April in Decatur, Alabama, is an agreeable spring month, with temperature in the range of an average high of 70.5°F (21.4°C) and an average low of 51.4°F (10.8°C). In April, the average high-temperature increases from an enjoyable 61.3°F (16.3°C) in March to an agreeable 70.5°F (21.4°C). Weather in April »

Weather in May

The last month of the spring, May, is a moderately hot month in Decatur, Alabama, with an average temperature ranging between min 59.9°F (15.5°C) and max 78.8°F (26°C). In May, the average high-temperature slightly increases from an agreeable 70.5°F (21.4°C) in April to a moderately hot 78.8°F (26°C). Weather in May »

Weather in June

The first month of the summer, June, is a hot month in Decatur, Alabama, with an average temperature varying between 67.3°F (19.6°C) and 86.7°F (30.4°C). In June, the average high-temperature marginally rises from a warm 78.8°F (26°C) in May to a tropical 86.7°F (30.4°C). Weather in June »

Weather in July

July, like June, is another hot summer month in Decatur, Alabama, with an average temperature fluctuating between 88.5°F (31.4°C) and 69.4°F (20.8°C). July is the warmest month, with an average high-temperature of 88.5°F (31.4°C) and an average low-temperature of 69.4°F (20.8°C). In July, the average heat index is computed to be a scorching 105.4°F (40.8°C). Weather in July »

Weather in August

The last month of the summer, August, is also a hot month in Decatur, Alabama, with an average temperature varying between 68.9°F (20.5°C) and 88.2°F (31.2°C). In August, the average high-temperature is practically the same as in July - a still tropical 88.2°F (31.2°C). Weather in August »

Weather in September

The first month of the autumn, September, is also a moderately hot month in Decatur, Alabama, with an average temperature ranging between min 63.7°F (17.6°C) and max 83.1°F (28.4°C). In Decatur, the average high-temperature in September is almost the same as in August - a warm 83.1°F (28.4°C). Weather in September »

Weather in October

October, the same as September, in Decatur, Alabama, is an agreeable autumn month, with temperature in the range of an average low of 52.7°F (11.5°C) and an average high of 72.1°F (22.3°C). In October, the average high-temperature decreases from a warm 83.1°F (28.4°C) in September to an agreeable 72.1°F (22.3°C). Weather in October »

Weather in November

November, the last month of the autumn in Decatur, is another mild month, with an average temperature varying between 42.3°F (5.7°C) and 59.5°F (15.3°C). In November, the average high-temperature decreases from an agreeable 72.1°F (22.3°C) in October to a mild 59.5°F (15.3°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cool month in Decatur, Alabama, with an average temperature fluctuating between 51.6°F (10.9°C) and 38.3°F (3.5°C). In Decatur, the average high-temperature in December slightly decreases from a moderate 59.5°F (15.3°C) in November to a fresh 51.6°F (10.9°C). Weather in December »
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FAQ

What is the coldest month in Decatur?

The coldest month in Decatur, Alabama, is January, with an average high-temperature of 47.5°F (8.6°C) and an average low-temperature of 33.3°F (0.7°C).

How many days does it rain in Decatur?

In Decatur, Alabama, during the entire year, the rain falls for 177.6 days and collects up to 43.11" (1095mm) of precipitation.

When does it snow in Decatur?

January through March, November and December are months with snowfall.

What is the snowiest month in Decatur?

The months with the most snowfall are January and February, with an average 0.55" (14mm) of accumulated snow.

How many days does it snow in Decatur?

In Decatur, Alabama, during the entire year, snow falls for 7.4 days and aggregates up to 1.77" (45mm) of snow.

When is the lowest UV index in Decatur?

The months with the lowest UV index in Decatur are January and December, with an average maximum UV index of 2.

What is the month with the least sunshine in Decatur?

February has the least sunshine of the year in Decatur, Alabama, with an average of 4.6h of sunshine.

When is Daylight Saving Time (DST) in Decatur?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from CDT to CST.

When it does not snow in Decatur?

April through October are months without snowfall.

When is the highest UV index in Decatur?

May through August, with an average maximum UV index of 6, are months with the highest UV index in Decatur, Alabama.

When are the longest days in Decatur?

With an average of 14h and 26min of daylight, June has the longest days of the year.

What month has the most sunshine in Decatur?

The month with the most sunshine is June, with an average of 10.5h of sunshine.

What is the warmest month in Decatur?

With an average high-temperature of 88.5°F (31.4°C) and an average low-temperature of 69.4°F (20.8°C), July is the warmest month in Decatur.

What is the driest month in Decatur?

The months with the least rainfall in Decatur are September and November Rain falls for 13.8 days and accumulates 2.48" (63mm) of rain.

What is the least humid month in Decatur?

The least humid month is October, with an average relative humidity of 72%.

What is the most humid month in Decatur?

With an average relative humidity of 79%, December is the most humid month.

What is the wettest month in Decatur?

The month with the most rainfall in Decatur, Alabama, is December, when the rain falls for 13.3 days and typically aggregates up to 4.45" (113mm) of precipitation.

What is the month with the shortest days in Decatur?

With an average of 9h and 53min of daylight, December has the shortest days of the year.

Average temperature
Decatur, AL

Average temperature - Decatur, AL

The warmest month (with the highest average high temperature) is July (88.5°F).
The month with the lowest average high temperature is January (47.5°F).

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (33.3°F).

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Average pressure
Decatur, AL

Average pressure - Decatur, AL

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

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Average wind speed
Decatur, AL

Average wind speed - Decatur, AL

The windiest month (with the highest average wind speed) is February (8.6mph).
The calmest month (with the lowest average wind speed) is July (4.8mph).

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Average rainfall
Decatur, AL

Average rainfall - Decatur, AL

The wettest month (with the highest rainfall) is December (4.45").
The driest months (with the least rainfall) are September and November (2.48").

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Average rainfall days
Decatur, AL

Average rainfall days - Decatur, AL

The month with the highest number of rainy days is July (20 days).
The month with the least rainy days is November (10.4 days).

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Average snowfall
Decatur, AL

Average snowfall - Decatur, AL

The months with the highest snowfall are January and February (0.55").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days
Decatur, AL

Average snowfall days - Decatur, AL

The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight / Average sunshine
Decatur, AL

Average daylight / Average sunshine - Decatur, AL

The month with the longest days is June (Average daylight: 14h and 26min).
The month with the shortest days is December (Average daylight: 9h and 53min).

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days
Decatur, AL

Average sunshine days - Decatur, AL

The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is July (8.8 days).

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Average UV index
Decatur, AL

Average UV index - Decatur, AL

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 and December (UV index 2).

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Average visibility
Decatur, AL

Average visibility - Decatur, AL

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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