Monthly weather forecast and climate
Decatur, AL

Weather in January

January, like December, is a frosty winter month in Decatur, Alabama, with average temperature ranging between max 47.5°F (8.6°C) and min 33.3°F (0.7°C). January is the coldest month, 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 fresh month in Decatur, Alabama, with average temperature fluctuating between 53.1°F (11.7°C) and 37.2°F (2.9°C). In February, the average high-temperature marginally rises, from a frosty 47.5°F (8.6°C) in January, to a fresh 53.1°F (11.7°C). Weather in February »

Weather in March

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

Weather in April

April in Decatur, Alabama, is a pleasant spring month, with average temperature fluctuating between 70.5°F (21.4°C) and 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 a pleasant 70.5°F (21.4°C). Weather in April »

Weather in May

The last month of the spring, May, is a warm month in Decatur, Alabama, with average temperature varying between 78.8°F (26°C) and 59.9°F (15.5°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

June, the first month of the summer, in Decatur, is a hot month, with temperature in the range of an average high of 86.7°F (30.4°C) and an average low of 67.3°F (19.6°C). In June, the average high-temperature slightly increases, 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, the same as June, in Decatur, Alabama, is another tropical summer month, with average temperature varying between 69.4°F (20.8°C) and 88.5°F (31.4°C). 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. The average heat index in July is estimated at a blistering 105.4°F (40.8°C). Weather in July »

Weather in August

The last month of the summer, August, is another tropical month in Decatur, Alabama, with average temperature fluctuating between 88.2°F (31.2°C) and 68.9°F (20.5°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

September, the first month of the autumn, in Decatur, is also a moderately hot month, with temperature in the range of an average high of 83.1°F (28.4°C) and an average low of 63.7°F (17.6°C). In September, the average high-temperature is relatively the same as in August - a moderately hot 83.1°F (28.4°C). Weather in September »

Weather in October

October, the same as September, in Decatur, Alabama, is another pleasant autumn month, with average temperature ranging between max 72.1°F (22.3°C) and min 52.7°F (11.5°C). In October, the average high-temperature drops, from a moderately hot 83.1°F (28.4°C) in September, to a pleasant 72.1°F (22.3°C). Weather in October »

Weather in November

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

Weather in December

December, the first month of the winter, in Decatur, is also a fresh month, with temperature in the range of an average high of 51.6°F (10.9°C) and an average low of 38.3°F (3.5°C). In Decatur, the average high-temperature in December marginally drops, from a moderate 59.5°F (15.3°C) in November, to a cool 51.6°F (10.9°C). Weather in December »
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FAQ

What is the coldest month in Decatur?

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

How much does it rain in Decatur?

Throughout the year, in Decatur, there are 177.6 rainfall days, and 43.11" (1095mm) of precipitation is accumulated.

When does it snow in Decatur?

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

How much does it snow in Decatur?

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

When does it snow the most in Decatur?

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

When is the lowest UV index in Decatur?

Months with the lowest UV index 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, with an average of 4.6h of sunshine.

When it does not snow in Decatur?

In Decatur snow does not fall in April through October.

What are the months with the highest UV index in Decatur?

Months with the highest UV index are May through August, with an average maximum UV index of 6.

When are the longest days in Decatur?

With an average of 14.4h of daylight, June has the longest days of the year in Decatur, Alabama.

What month has the most sunshine in Decatur?

With an average of 10.5h of sunshine, June has the most sunshine of the year in Decatur.

What is the warmest month in Decatur?

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

What is the driest month in Decatur?

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?

With an average relative humidity of 72%, October is the least humid month in Decatur, Alabama.

What is the most humid month in Decatur?

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

What is the rainiest month in Decatur?

December is the month with the most rainfall in Decatur. Rain falls for 13.3 days and accumulates 4.45" (113mm) of precipitation.

What is the month with the shortest days in Decatur?

December has the shortest days of the year, with an average of 9.9h of daylight.

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").
The month with the lowest atmospheric pressure is June (29.98").

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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

Months with the highest snowfall are January and February (0.55").
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).
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: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

The month with the most sunshine is June (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.6h).

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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 visibility
Decatur, AL

Average visibility - Decatur, AL

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

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