North Decatur weather in September

In September, North Decatur sees average daytime highs of 82°F and overnight lows near 65°F, with 3.5 in of rain across 8.7 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 9th-wettest month of the year here.

Highs ease over the month, from about 85°F in the first days to 79°F by the end. The sky is clear or mostly clear about 39% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 42 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is North Decatur's 3rd-clearest and 9th-windiest month. For the whole year in context, see North Decatur's year-round climate.

Daytime high
82°
4th warmest
Overnight low
65°
9th coldest
Rainfall
3.5 in
8.7 wet days
Daylight
12 h 12 min
6:25 AM – 6:38 PM
Cloud cover
53%
3rd clearest
Wind
6 mph
9th windiest
Solar energy
4.62 kWh/m²
Travel score
6.2
out of 10

North Decatur is census-designated place in DeKalb County, Georgia.

Density
1,294/km²
people per km²

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 85°F in the first days to 79°F by the end.

A typical September day in North Decatur reaches about 82°F in the afternoon and slips back to 65°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 75°F and 90°F. Set against its neighbours, September runs about 5°F cooler than August and about 9°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
18669
28568
38568
48568
58568
68567
78567
88567
98467
108466
118466
128466
138365
148365
158365
168365
178264
188264
198264
208264
218163
228163
238062
248062
258062
267961
277961
287960
297860
307860

How September really feels in North Decatur

Once humidity and wind are folded in, September averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

North Decatur weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan53° / 35°4.210.20.6103.0
Feb57° / 38°4.59.50.310.74.0
Mar64° / 44°4.510.10.111.75.8
Apr73° / 52°3.59.1012.86.9
May80° / 61°3.010013.76.5
Jun86° / 68°3.913.9014.24.6
Jul88° / 72°4.015.50143.8
Aug87° / 71°4.012.7013.34.3
Sep82° / 65°3.58.7012.26.2
Oct73° / 53°3.16.7011.17.4
Nov63° / 43°3.78.1010.25.9
Dec55° / 37°4.310.10.39.83.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 39% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 44%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15446
25446
35545
45545
55545
65644
75743
85743
95842
105842
115842
125842
135842
145842
155842
165743
175743
185644
195644
205446
215446
225446
235545
245545
255545
265644
275644
285644
295644
305644

Chance of precipitation in September

Any precipitation

North Decatur gets around 3.5 in of rain over 8.7 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 28% and peaks near 33% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
133
232
331
430
530
629
728
828
927
1027
1126
1226
1326
1427
1527
1627
1728
1828
1929
2029
2129
2229
2329
2429
2529
2628
2727
2827
2926
3026

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the muggy band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 42% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
138234223
249244222
3510254120
4510254019
5611263918
6712273816
7813273715
8914283614
91014283513
101115283412
111216283312
121316283211
131317273211
141417273110
151518273010
161618273010
17161927299
18171926289
19181926289
20191926278
21201926278
22212025268
23232025257
24242024257
25262124246
26272123236
27292123225
28302122225
29312122214
30332122204

Wind in September

Winds average 6 mph in September.

Across September, daily wind ranges from about 5 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 42 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over September. Sunrise moves from 6:15 AM to 6:35 AM, and sunset from 6:59 PM to 6:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.76:156:59
212.76:166:58
312.76:166:56
412.66:176:55
512.66:186:54
612.66:186:52
712.56:196:51
812.56:206:49
912.56:206:48
1012.46:216:46
1112.46:226:45
1212.46:236:44
1312.36:236:42
1412.36:246:41
1512.26:256:39
1612.26:256:38
1712.26:266:36
1812.16:276:35
1912.16:276:33
2012.16:286:32
2112.06:296:31
2212.06:306:29
2312.06:306:28
2411.96:316:26
2511.96:326:25
2611.86:326:23
2711.86:336:22
2811.86:346:20
2911.76:356:19
3011.76:356:18

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.62 kWh/m².

For context, solar energy here swings from a low near 2.32 kWh/m² to a high of 6.08 kWh/m² in May across the year — September's 4.62 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.0Bright
74.9Bright
84.9Bright
94.9Bright
104.8Bright
114.8Bright
124.8Bright
134.7Bright
144.7Bright
154.7Bright
164.6Bright
174.6Bright
184.5Bright
194.5Bright
204.5Bright
214.4Bright
224.4Bright
234.4Bright
244.3Bright
254.3Bright
264.3Bright
274.3Bright
284.2Bright
294.2Bright
304.2Bright
Planning a trip in September

Is September a good time to visit North Decatur?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.2
Sightseeing
4th-best month of the year
7.0
Beach & pool
1st-best month of the year

September is a reasonable time to visit North Decatur for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for North Decatur in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, North Decatur sees daytime highs around 82°F and nights near 65°F. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in North Decatur in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in North Decatur peaks around July 12 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 12UV 10Dec 19UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar5High
Apr7Very high
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep7Very high
Oct5High
Nov4Moderate
Dec3Moderate

Air quality in North Decatur in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in North Decatur is worst in July — around 21 µg/m³ PM2.5 (moderate), about 2.7× the cleanest month (January, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1621 µg/m³Jan 118 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb11Good
Mar13Moderate
Apr12Moderate
May15Moderate
Jun18Moderate
Jul21Moderate
Aug18Moderate
Sep13Moderate
Oct11Good
Nov10Good
Dec8Good
Location & terrain

Where is North Decatur?

North Decatur sits at 33.8°N, 84.3°W, 994 ft above sea level, in United States. The nearest listed city is Decatur, 1.2 mi away.

Topography around North Decatur

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of North Decatur.

Within 2 miles, the terrain around North Decatur has only modest variations in elevation — a maximum elevation change of 269 ft around an average of 991 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 965 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,887 ft.

The land around North Decatur is covered by trees (71%) and artificial surfaces (24%) within 2 miles, trees (70%) and artificial surfaces (24%) within 10 miles, and trees (81%) within 50 miles.

2 miles
269 ft
10 miles
965 ft
50 miles
2,887 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Decatur 1.2 mi · North Druid Hills 1.9 mi · Belvedere Park 3.1 mi · Candler-McAfee 5.0 mi · Brookhaven 5.0 mi · Atlanta 5.6 mi · Tucker 6.8 mi · Chamblee 6.8 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for North Decatur (33.7904°, -84.306°, elevation 994 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).