Monthly outlook for Decatur, GA: average high 95.6°, average low 75.8°. That is 5.2° above the climate normal for August. Precipitation is expected on 10 days (about 1.1 inches), against a normal of 7 days and 2.1 inches. The warmest day looks like 23 August (101.8°), the coolest 9 August (69°).
95.6°/75.8°
Average high / low
+5.2°
Above normal
10 / 7
Wet days / normal
1.1 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 August – 17 August
93.4°
86.1°
+4.1°
18 August – 27 August
99.4°
86.3°
+7.3°
28 August – 6 September
at normal
84.1°
—
August records over 66 years
101.3°10 August 2007All-time high
57.4°29 August 1967All-time low
Sun, 0987° / 69°0.06
87 °
Decatur, Sunday, 9 August
Rain. High 87°, low 69°.
Pressure30.12 inHg
Wind3.2 mph S
Humidity47%
Visibility6.2 mi
Dew point67°
Mon, 1093° / 73°0.1
93 °
Decatur, Monday, 10 August
Rain. High 93°, low 73°.
Pressure30.15 inHg
Wind4.8 mph W
Humidity44%
Visibility6.2 mi
Dew point67°
Tue, 1195° / 75°0.08
95 °
Decatur, Tuesday, 11 August
Light rain. High 95°, low 75°.
Pressure30.09 inHg
Wind6.4 mph W
Humidity46%
Visibility6.2 mi
Dew point68°
Wed, 1295° / 78°0.04
95 °
Decatur, Wednesday, 12 August
Light rain. High 95°, low 78°.
Pressure30.00 inHg
Wind11.9 mph W
Humidity40%
Visibility6.2 mi
Dew point65°
Thu, 1396° / 76°0.02
96 °
Decatur, Thursday, 13 August
Light rain. High 96°, low 76°.
Pressure29.97 inHg
Wind10 mph NW
Humidity39%
Visibility—
Dew point63°
Fri, 1494° / 77°0.2
94 °
Decatur, Friday, 14 August
Rain. High 94°, low 77°.
Pressure30.06 inHg
Wind8.3 mph W
Humidity42%
Visibility—
Dew point65°
Sat, 1590° / 76°0.09
90 °
Decatur, Saturday, 15 August
Light rain. High 90°, low 76°.
Pressure30.18 inHg
Wind9.4 mph NW
Humidity73%
Visibility—
Dew point70°
Sun, 1696° / 74°0.03
96 °
Decatur, Sunday, 16 August
Light rain. High 96°, low 74°.
Pressure30.12 inHg
Wind6.2 mph SE
Humidity43%
Visibility—
Dew point66°
Mon, 1798° / 76°0.09
98 °
Decatur, Monday, 17 August
Light rain. High 98°, low 76°.
Pressure30.03 inHg
Wind10.2 mph NW
Humidity35%
Visibility—
Dew point63°
Tue, 18101° / 80°0.02
101 °
Decatur, Tuesday, 18 August
Light rain. High 101°, low 80°.
Pressure29.94 inHg
Wind11.3 mph NW
Humidity33%
Visibility—
Dew point62°
Wed, 1999° / 79°0.11
99 °
Decatur, Wednesday, 19 August
Light rain. High 99°, low 79°.
Pressure29.88 inHg
Wind10.8 mph NW
Humidity31%
Visibility—
Dew point60°
Thu, 20100° / 80°0
100 °
Decatur, Thursday, 20 August
Clear. High 100°, low 80°.
Pressure29.80 inHg
Wind11.7 mph NW
Humidity32%
Visibility—
Dew point62°
Fri, 2195° / 76°0.03
95 °
Decatur, Friday, 21 August
Light rain. High 95°, low 76°.
Pressure29.94 inHg
Wind7.5 mph NW
Humidity28%
Visibility—
Dew point54°
Sat, 22100° / 76°0.11
100 °
Decatur, Saturday, 22 August
Light rain. High 100°, low 76°.
Pressure30.00 inHg
Wind4.9 mph SE
Humidity35%
Visibility—
Dew point62°
Sun, 23102° / 78°0.06
102 °
Decatur, Sunday, 23 August
Light rain. High 102°, low 78°.
Pressure30.03 inHg
Wind7.7 mph W
Humidity33%
Visibility—
Dew point62°
From day 17 onward the outlook is built from 60-year climate statistics
Mon, 2486° / 69°0.15
86 °
Decatur, Monday, 24 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.15 in
Chance of precipitation45%
Record high99° (1983)
Record low60° (1969)
Tue, 2585° / 69°0.17
85 °
Decatur, Tuesday, 25 August
Climate normal for this date — 60-year average.
Average high85°
Average low69°
Average precipitation0.17 in
Chance of precipitation43%
Record high95° (2023)
Record low59° (1969)
Wed, 2686° / 69°0.13
86 °
Decatur, Wednesday, 26 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.13 in
Chance of precipitation37%
Record high98° (2011)
Record low60° (2013)
Thu, 2786° / 69°0.09
86 °
Decatur, Thursday, 27 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.09 in
Chance of precipitation25%
Record high96° (2023)
Record low59° (2025)
Fri, 2886° / 70°0.1
86 °
Decatur, Friday, 28 August
Climate normal for this date — 60-year average.
Average high86°
Average low70°
Average precipitation0.1 in
Chance of precipitation32%
Record high95° (1987)
Record low63° (2025)
Sat, 2986° / 69°0.07
86 °
Decatur, Saturday, 29 August
Climate normal for this date — 60-year average.
Average high86°
Average low69°
Average precipitation0.07 in
Chance of precipitation33%
Record high97° (1990)
Record low57° (1967)
Sun, 3084° / 69°0.12
84 °
Decatur, Sunday, 30 August
Climate normal for this date — 60-year average.
Average high84°
Average low69°
Average precipitation0.12 in
Chance of precipitation45%
Record high93° (1998)
Record low59° (1992)
Mon, 3184° / 69°0.17
84 °
Decatur, Monday, 31 August
Climate normal for this date — 60-year average.
Average high84°
Average low69°
Average precipitation0.17 in
Chance of precipitation48%
Record high96° (1970)
Record low59° (1986)
Tue, 0184° / 69°0.11
84 °
Decatur, Tuesday, 1 September
Climate normal for this date — 60-year average.
Average high84°
Average low69°
Average precipitation0.11 in
Chance of precipitation45%
Record high95° (1970)
Record low61° (1968)
Wed, 0284° / 68°0.12
84 °
Decatur, Wednesday, 2 September
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.12 in
Chance of precipitation33%
Record high96° (1970)
Record low59° (1968)
Thu, 0384° / 68°0.12
84 °
Decatur, Thursday, 3 September
Climate normal for this date — 60-year average.
Average high84°
Average low68°
Average precipitation0.12 in
Chance of precipitation40%
Record high95° (2011)
Record low58° (1967)
Fri, 0483° / 68°0.16
83 °
Decatur, Friday, 4 September
Climate normal for this date — 60-year average.
Average high83°
Average low68°
Average precipitation0.16 in
Chance of precipitation38%
Record high95° (2019)
Record low58° (1994)
Sat, 0583° / 67°0.12
83 °
Decatur, Saturday, 5 September
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.12 in
Chance of precipitation35%
Record high94° (1999)
Record low57° (1967)
Sun, 0683° / 67°0.07
83 °
Decatur, Sunday, 6 September
Climate normal for this date — 60-year average.
Average high83°
Average low67°
Average precipitation0.07 in
Chance of precipitation32%
Record high94° (1999)
Record low57° (1984)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Decatur, GA are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Decatur, GA since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.