Climate and monthly weather forecast
Decatur, GA

Weather in January

January, the same as December, is another fresh winter month in Decatur, Georgia, with an average temperature ranging between max 50.5°F (10.3°C) and min 34.9°F (1.6°C). January is the coldest month, with an average high-temperature of 50.5°F (10.3°C) and an average low-temperature of 34.9°F (1.6°C). Weather in January »

Weather in February

The last month of the winter, February, is also a fresh month in Decatur, Georgia, with an average temperature varying between 55°F (12.8°C) and 38.7°F (3.7°C). In February, the average high-temperature is practically the same as in January - a still fresh 55°F (12.8°C). Weather in February »

Weather in March

March, the first month of the spring in Decatur, is an enjoyable month, with an average temperature ranging between min 45.5°F (7.5°C) and max 63.1°F (17.3°C). In Decatur, the average high-temperature in March slightly increases from a fresh 55°F (12.8°C) in February to an enjoyable 63.1°F (17.3°C). Weather in March »

Weather in April

April is a pleasant spring month in Decatur, Georgia, with an average temperature ranging between max 72.9°F (22.7°C) and min 53.2°F (11.8°C). In Decatur, the average high-temperature in April increases from an enjoyable 63.1°F (17.3°C) in March to an agreeable 72.9°F (22.7°C). Weather in April »

Weather in May

The last month of the spring, May, is a warm month in Decatur, Georgia, with temperature in the range of an average high of 81°F (27.2°C) and an average low of 61.3°F (16.3°C). In May, the average high-temperature slightly increases from a pleasant 72.9°F (22.7°C) in April to a moderately hot 81°F (27.2°C). Weather in May »

Weather in June

The first month of the summer, June, is a hot month in Decatur, Georgia, with an average temperature fluctuating between 68.4°F (20.2°C) and 87.8°F (31°C). In June, the average high-temperature slightly increases from a warm 81°F (27.2°C) in May to a tropical 87.8°F (31°C). Weather in June »

Weather in July

July, like June, is another hot summer month in Decatur, Georgia, with temperature in the range of an average high of 90.7°F (32.6°C) and an average low of 71.6°F (22°C). With an average high-temperature of 90.7°F (32.6°C) and an average low-temperature of 71.6°F (22°C), July is the warmest month. The average heat index in July is appraised at a blistering 107.6°F (42°C). Weather in July »

Weather in August

The last month of the summer, August, is another hot month in Decatur, Georgia, with an average temperature varying between 70.7°F (21.5°C) and 89.2°F (31.8°C). In August, the average high-temperature is almost the same as in July - a still tropical 89.2°F (31.8°C). Weather in August »

Weather in September

September, the first month of the autumn in Decatur, is also a moderately hot month, with an average temperature varying between 84.2°F (29°C) and 65.5°F (18.6°C). In September, the average high-temperature is practically the same as in August - a warm 84.2°F (29°C). Weather in September »

Weather in October

October, the same as September, in Decatur, Georgia, is another pleasant autumn month, with temperature in the range of an average low of 53.8°F (12.1°C) and an average high of 73.2°F (22.9°C). In October, the average high-temperature decreases from a moderately hot 84.2°F (29°C) in September to a pleasant 73.2°F (22.9°C). Weather in October »

Weather in November

The last month of the autumn, November, is also an enjoyable month in Decatur, Georgia, with an average temperature fluctuating between 61.3°F (16.3°C) and 43.7°F (6.5°C). In Decatur, the average high-temperature in November drops from an agreeable 73.2°F (22.9°C) in October to an enjoyable 61.3°F (16.3°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cool month in Decatur, Georgia, with temperature in the range of an average high of 53.8°F (12.1°C) and an average low of 39.7°F (4.3°C). In December, the average high-temperature marginally drops from a comfortable 61.3°F (16.3°C) in November to a cool 53.8°F (12.1°C). Weather in December »
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FAQ

What is the coldest month in Decatur?

January is the coldest month in Decatur, Georgia, with an average high-temperature of 50.5°F (10.3°C) and an average low-temperature of 34.9°F (1.6°C).

How much does it rain in Decatur?

In Decatur, during the entire year, the rain falls for 134.6 days and collects up to 14.72" (374mm) of precipitation.

When does it snow in Decatur?

January through March and December are months with snowfall.

How much does it snow in Decatur?

In Decatur, during the entire year, snow falls for 2.3 days and aggregates up to 0.59" (15mm) of snow.

When is the lowest UV index in Decatur?

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

What is the snowiest month in Decatur?

February is the month with the most snowfall in Decatur, Georgia. Snow falls for 0.9 days and accumulates 0.2" (5mm) of snow.

When is Daylight Saving Time (DST) in Decatur?

On Sunday, March 12. 2023, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 5. 2023, at 2:00 am, and the time zone reverts from EDT to EST.

When it does not snow in Decatur?

April through November are months without snowfall in Decatur, Georgia.

When are the longest days in Decatur?

With an average of 14h and 22min of daylight, June has the longest days of the year.

What is the month with the most sunshine in Decatur?

The months with the most sunshine are June and July, with an average of 10.7h of sunshine.

What is the warmest month in Decatur?

The warmest month is July, with an average high-temperature of 90.7°F (32.6°C) and an average low-temperature of 71.6°F (22°C).

What are the least humid months in Decatur?

July and August, with an average relative humidity of 69%, are the least humid months in Decatur, Georgia.

What is the wettest month in Decatur?

The month with the most rainfall in Decatur, Georgia, is August, when the rain falls for 17.1 days and typically aggregates up to 2.32" (59mm) of precipitation.

What is the month with the highest UV index in Decatur?

With an average maximum UV index of 7, August is the month with the highest UV index in Decatur.

What is the driest month in Decatur?

September is the month with the least rainfall in Decatur, Georgia. Rain falls for 8.6 days and accumulates 0.55" (14mm) of precipitation.

What is the most humid month in Decatur?

December is the most humid month in Decatur, with an average relative humidity of 77%.

What is the month with the shortest days in Decatur?

The month with the shortest days is December, with an average of 9h and 57min of daylight.

What is the month with the least sunshine in Decatur?

With an average of 5.1h of sunshine, December has the least sunshine of the year in Decatur, Georgia.

Average temperature
Decatur, GA

Average temperature - Decatur, GA

The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (50.5°F).

The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (34.9°F).

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Average pressure
Decatur, GA

Average pressure - Decatur, GA

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).

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Average wind speed
Decatur, GA

Average wind speed - Decatur, GA

The windiest month (with the highest average wind speed) is January (8mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).

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Average humidity
Decatur, GA

Average humidity - Decatur, GA

The month with the highest relative humidity is December (77%).
The months with the lowest relative humidity are July and August (69%).

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Average rainfall
Decatur, GA

Average rainfall - Decatur, GA

The wettest month (with the highest rainfall) is August (2.32").
The driest month (with the least rainfall) is September (0.55").

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Average rainfall days
Decatur, GA

Average rainfall days - Decatur, GA

The month with the highest number of rainy days is August (17.1 days).
The month with the least rainy days is November (6.9 days).

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Average snowfall
Decatur, GA

Average snowfall - Decatur, GA

The month with the highest snowfall is February (0.2").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

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Average snowfall days
Decatur, GA

Average snowfall days - Decatur, GA

The month with the highest number of snowfall days is February (0.9 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, GA

Average daylight / Average sunshine - Decatur, GA

The month with the longest days is June (Average daylight: 14h and 22min).
The month with the shortest days is December (Average daylight: 9h and 57min).

The months with the most sunshine are June and July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).

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Average sunshine days
Decatur, GA

Average sunshine days - Decatur, GA

The month with the most sunshine days is October (22.6 days).
The month with the least sunshine days is July (10.9 days).

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Average visibility
Decatur, GA

Average visibility - Decatur, GA

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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