Opelika weather in September

In September, Opelika sees average daytime highs of 84°F and overnight lows near 66°F, with 3.3 in of rain across 8.8 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 87°F in the first days to 81°F by the end. The sky is clear or mostly clear about 38% 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 Opelika's 3rd-clearest and 9th-windiest month. For the whole year in context, see Opelika's year-round climate.

Daytime high
84°
4th warmest
Overnight low
66°
9th coldest
Rainfall
3.3 in
8.8 wet days
Daylight
12 h 12 min
5:30 AM – 5:42 PM
Cloud cover
52%
3rd clearest
Wind
5 mph
9th windiest
Solar energy
4.77 kWh/m²
Travel score
5.7
out of 10

Opelika is city in Alabama, United States.

Density
188/km²
people per km²
Founded
1854

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 87°F in the first days to 81°F by the end.

A typical September day in Opelika reaches about 84°F in the afternoon and slips back to 66°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 77°F and 91°F. Set against its neighbours, September runs about 4°F cooler than August and about 9°F warmer than October.

50°60°70°80°90°151015202530
Avg high (°F)Avg low (°F)
18770
28770
38769
48769
58769
68669
78669
88668
98668
108668
118668
128567
138567
148567
158567
168566
178466
188466
198465
208365
218365
228365
238364
248264
258264
268263
278163
288162
298162
308062

How September really feels in Opelika

Once humidity and wind are folded in, September averages 3 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
3
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Opelika weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan56° / 38°4.51010.13.8
Feb60° / 41°4.79.810.84.7
Mar67° / 47°4.61011.86.3
Apr74° / 54°3.88.712.87.1
May82° / 62°3.18.913.76.4
Jun87° / 70°4.01314.14.3
Jul89° / 72°5.11613.93.6
Aug88° / 72°3.913.613.23.9
Sep84° / 66°3.38.812.25.7
Oct75° / 55°2.9711.27.5
Nov65° / 45°4.28.110.36.4
Dec58° / 40°4.7109.94.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% 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
25545
35545
45545
55545
65644
75644
85743
95743
105743
115842
125842
135842
145743
155743
165743
175644
185644
195545
205644
215545
225545
235644
245644
255644
265644
275743
285842
295842
305842

Chance of precipitation in September

Any precipitation

Opelika gets around 3.3 in of rain over 8.8 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 29% and peaks near 35% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
135
235
334
433
532
631
730
830
929
1028
1128
1228
1328
1428
1528
1628
1728
1829
1929
2029
2129
2229
2329
2428
2528
2627
2727
2826
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 33% of days. Sticky, muggy-or-worse air turns up on roughly 55% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1251540371
2261640361
3261740340
4371740330
5371840310
6381939300
7492038290
84102137280
94112237270
105112236260
115122335250
126132334240
136142433230
146142433230
157152432220
168152432210
178152432210
189162432200
1910162431190
2011162331180
2113162331170
2214162331160
2316162230150
2418162230140
2520162229130
2621162129120
2723172128110
2825172127100
292617212690
302817212590

Wind in September

Winds average 5 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
115calm
125calm
135calm
145calm
155calm
165calm
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 5:20 AM to 5:39 AM, and sunset from 6:02 PM to 5:22 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:206:02
212.75:216:01
312.65:216:00
412.65:225:58
512.65:235:57
612.55:235:56
712.55:245:54
812.55:255:53
912.45:255:52
1012.45:265:50
1112.45:275:49
1212.35:275:47
1312.35:285:46
1412.35:295:45
1512.25:295:43
1612.25:305:42
1712.25:315:40
1812.15:315:39
1912.15:325:38
2012.15:335:36
2112.05:335:35
2212.05:345:33
2312.05:355:32
2411.95:355:31
2511.95:365:29
2611.95:375:28
2711.85:375:26
2811.85:385:25
2911.85:395:24
3011.75:395:22

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.77 kWh/m².

For context, solar energy here swings from a low near 2.42 kWh/m² to a high of 6.24 kWh/m² in May across the year — September's 4.77 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
124.9Bright
134.9Bright
144.9Bright
154.8Bright
164.8Bright
174.8Bright
184.7Bright
194.7Bright
204.6Bright
214.6Bright
224.6Bright
234.5Bright
244.5Bright
254.5Bright
264.4Bright
274.4Bright
284.4Bright
294.4Bright
304.3Bright
Planning a trip in September

Is September a good time to visit Opelika?

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

5.7
Sightseeing
6th-best month of the year
7.0
Beach & pool
1st-best month of the year

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

What to pack for Opelika in September

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

In September, Opelika sees daytime highs around 84°F and nights near 66°F. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Opelika in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Opelika peaks around July 13 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 13UV 10Dec 19UV 3
UV index (midday)Level
Jan4Moderate
Feb5High
Mar6High
Apr8Very high
May8Very high
Jun9Very high
Jul10Very high
Aug9Very high
Sep8Very high
Oct5High
Nov4Moderate
Dec3Moderate

Air quality in Opelika 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 Opelika is worst in July — around 21 µg/m³ PM2.5 (moderate), about 3.0× the cleanest month (January, 7 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1921 µg/m³Jan 127 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb10Good
Mar13Moderate
Apr12Moderate
May13Moderate
Jun17Moderate
Jul21Moderate
Aug19Moderate
Sep18Moderate
Oct15Moderate
Nov10Good
Dec8Good
Location & terrain

Where is Opelika?

Opelika sits at 32.6°N, 85.4°W, 807 ft above sea level, in United States. The nearest listed city is Auburn, 6.2 mi away.

Topography around Opelika

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

Within 2 miles, the terrain around Opelika has only modest variations in elevation — a maximum elevation change of 203 ft around an average of 784 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 755 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,385 ft.

The land around Opelika is covered by trees (61%) within 2 miles, trees (76%) within 10 miles, and trees (86%) within 50 miles.

2 miles
203 ft
10 miles
755 ft
50 miles
1,385 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Auburn 6.2 mi · Phenix City 25 mi · Columbus 26 mi · LaGrange 34 mi · Montgomery 57 mi · Millbrook 58 mi · Newnan 61 mi · Prattville 64 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 Opelika (32.6454°, -85.3783°, elevation 807 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).