Climate and monthly weather forecastDecatur, GA
Climate and monthly weather forecast
Weather in January
January, the same as December, is another fresh winter month in Decatur, Georgia, with an average temperature varying between 50.5°F (10.3°C) and 34.9°F (1.6°C). January brings the lowest temperatures, with an average high of 50.5°F (10.3°C) and an average low of 34.9°F (1.6°C). Weather in January »Weather in February
The last month of the winter, February, is another cool month in Decatur, Georgia, with an average temperature fluctuating between 38.7°F (3.7°C) and 55°F (12.8°C). Decatur, Georgia, notes an average high-temperature of a still cool 55°F (12.8°C) in February, hardly diverging from January. Weather in February »Weather in March
March, the first month of the spring in Decatur, is an enjoyable month, with an average temperature fluctuating between 45.5°F (7.5°C) and 63.1°F (17.3°C). As Decatur welcomes March, the average high-temperature displays a subtle shift, adjusting from a cool 55°F (12.8°C) in February to a comfortable 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). The shift from March to April is marked by an increase in the average high-temperature, moving from a comfortable 63.1°F (17.3°C) to an agreeable 72.9°F (22.7°C). Weather in April »Weather in May
The last month of the spring, May, is a moderately hot month in Decatur, Georgia, with an average temperature fluctuating between 81°F (27.2°C) and 61.3°F (16.3°C). The shift into May brings a slight increase in the average high-temperature, moving from an agreeable 72.9°F (22.7°C) in April to a moderately hot 81°F (27.2°C). Weather in May »Weather in June
June, the first month of the summer in Decatur, is a tropical month, with an average temperature varying between 68.4°F (20.2°C) and 87.8°F (31°C). Decatur's weather shows a minor temperature rise with the arrival of June, moving from a moderately hot 81°F (27.2°C) in May to a hot 87.8°F (31°C). Weather in June »Weather in July
July, like June, is a hot summer month in Decatur, Georgia, with an average temperature varying between 71.6°F (22°C) and 90.7°F (32.6°C). With average high temperatures of 90.7°F (32.6°C) and lows of 71.6°F (22°C), July is the warmest month. In July, the heat index is calculated to be a blisteringly hot 107.6°F (42°C). Weather in July »Weather in August
The last month of the summer, August, is another tropical month in Decatur, Georgia, with an average temperature ranging between max 89.2°F (31.8°C) and min 70.7°F (21.5°C). August begins with an average high-temperature of a still hot 89.2°F (31.8°C), reflecting close similarity to the preceding month. Weather in August »Weather in September
September, the first month of the autumn in Decatur, is still a warm month, with temperature in the range of an average low of 65.5°F (18.6°C) and an average high of 84.2°F (29°C). Decatur's weather in September, with an average high-temperature of a moderately hot 84.2°F (29°C), subtly shifts from August's 89.2°F (31.8°C). Weather in September »Weather in October
October, like September, is another pleasant autumn month in Decatur, Georgia, with an average temperature ranging between min 53.8°F (12.1°C) and max 73.2°F (22.9°C). In Decatur, the average high-temperature in October drops from a warm 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). A decrease in the average high-temperature is observed during November, shifting from an agreeable 73.2°F (22.9°C) in October to a refreshing 61.3°F (16.3°C). Weather in November »Weather in December
December, the first month of the winter in Decatur, is still a cool month, 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). The arrival of December correlates with a minor temperature reduction, down from November's refreshing 61.3°F (16.3°C) to a cool 53.8°F (12.1°C). Weather in December »Updated: Aug 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
January, with average temperatures reaching a high of 50.5°F (10.3°C) and a low of 34.9°F (1.6°C), is the coldest month.
Throughout the year, there are 134.6 rainfall days, and 14.72" (374mm) of precipitation is accumulated.
Months with snowfall are January through March and December.
Throughout the year, there are 2.3 snowfall days, and 0.59" (15mm) of snow is accumulated.
The months with the lowest UV index are January and December, with an average maximum UV index of 2.
The month with the most snowfall in Decatur is February, when snow falls for 0.9 days and typically aggregates up to 0.2" (5mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
In Decatur, snow does not fall in April through November.
With an average of 14h and 24min of daylight, June has the longest days of the year.
June and July, with an average of 10.7h of sunshine, are months with the most sunshine.
July stands out as Decatur's warmest month, with an average high-temperature of 90.7°F (32.6°C) and a low-temperature of 71.6°F (22°C).
The months with the lowest humidity are July and August, with an average relative humidity of 69%.
August is the month with the most rainfall. Rain falls for 17.1 days and accumulates 2.32" (59mm) of precipitation.
August is the month with the highest UV index, with an average maximum UV index of 7.
September is the month with the least rainfall. Rain falls for 8.6 days and accumulates 0.55" (14mm) of precipitation.
With an average relative humidity of 77%, December is the most humid month.
The month with the shortest days is December, with an average of 10h and 0min of daylight.
The month with the least sunshine is December, with an average of 5.1h of sunshine.
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).
Average pressure
Decatur, GA
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.1"Hg - Average pressure in April:
30.02"Hg - Average pressure in May:
30.03"Hg - Average pressure in June:
29.99"Hg
- Average pressure in July:
30.01"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.06"Hg - Average pressure in November:
30.15"Hg - Average pressure in December:
30.15"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed
Decatur, GA
- Average wind speed in January:
8mph - Average wind speed in February:
7.8mph - Average wind speed in March:
7.4mph - Average wind speed in April:
7.3mph - Average wind speed in May:
5.8mph - Average wind speed in June:
5.1mph
- Average wind speed in July:
4.7mph - Average wind speed in August:
4.5mph - Average wind speed in September:
4.8mph - Average wind speed in October:
6.2mph - Average wind speed in November:
6.7mph - Average wind speed in December:
7.5mph
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).
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%).
Average rainfall
Decatur, GA
- Average rainfall in January:
1.02" - Average rainfall in February:
1.18" - Average rainfall in March:
0.87" - Average rainfall in April:
1.22" - Average rainfall in May:
1.14" - Average rainfall in June:
1.34"
- Average rainfall in July:
2.05" - Average rainfall in August:
2.32" - Average rainfall in September:
0.55" - Average rainfall in October:
0.79" - Average rainfall in November:
0.94" - Average rainfall in December:
1.3"
The wettest month (with the highest rainfall) is August (2.32").
The driest month (with the least rainfall) is September (0.55").
Average rainfall days
Decatur, GA
- Average rainfall days in January:
8.4 days - Average rainfall days in February:
9.1 days - Average rainfall days in March:
11.3 days - Average rainfall days in April:
11.1 days - Average rainfall days in May:
13.5 days - Average rainfall days in June:
14.6 days
- Average rainfall days in July:
16.9 days - Average rainfall days in August:
17.1 days - Average rainfall days in September:
8.6 days - Average rainfall days in October:
7.6 days - Average rainfall days in November:
6.9 days - Average rainfall days in December:
9.5 days
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).
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").
Average snowfall days
Decatur, GA
- Average snowfall days in January:
0.6 days - Average snowfall days in February:
0.9 days - Average snowfall days in March:
0.3 days - Average snowfall days in April:
0.1 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0.1 days - Average snowfall days in December:
0.3 days
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).
Average daylight / Average sunshine
Decatur, GA
- Average daylight in January:
10h and 12min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 0min - Average daylight in May:
13h and 54min - Average daylight in June:
14h and 24min
- Average daylight in July:
14h and 6min - Average daylight in August:
13h and 24min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 18min - Average daylight in November:
10h and 24min - Average daylight in December:
10h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January:
5h and 48min - Average sunshine in February:
6h and 36min - Average sunshine in March:
7h and 6min - Average sunshine in April:
8h and 30min - Average sunshine in May:
10h and 0min - Average sunshine in June:
10h and 42min
- Average sunshine in July:
10h and 42min - Average sunshine in August:
9h and 36min - Average sunshine in September:
8h and 42min - Average sunshine in October:
7h and 12min - Average sunshine in November:
5h and 54min - Average sunshine in December:
5h and 6min
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).
Average sunshine days
Decatur, GA
- Average sunshine days in January:
20.8 days - Average sunshine days in February:
16.9 days - Average sunshine days in March:
17.9 days - Average sunshine days in April:
17 days - Average sunshine days in May:
15.3 days - Average sunshine days in June:
12.9 days
- Average sunshine days in July:
10.9 days - Average sunshine days in August:
11.2 days - Average sunshine days in September:
19.2 days - Average sunshine days in October:
22.6 days - Average sunshine days in November:
21 days - Average sunshine days in December:
19.2 days
The month with the most sunshine days is October (22.6 days).
The month with the least sunshine days is July (10.9 days).
Average UV index
Decatur, GA
The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover
Decatur, GA
The month with the most cloud cover is December (Cloud cover 46).
The month with the least cloud cover is June (Cloud cover 29).
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).
