Alliance weather in September

In September, Alliance sees average daytime highs of 74°F and overnight lows near 55°F, with 3.6 in of rain across 9.8 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 78°F in the first days to 69°F by the end. The sky is clear or mostly clear about 35% of the time in September, and the air most often feels dry.

Daylight stretches from about 13 hours at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Alliance's 1st-clearest and 10th-windiest month. For the whole year in context, see Alliance's year-round climate.

Daytime high
74°
4th warmest
Overnight low
55°
9th coldest
Rainfall
3.6 in
9.8 wet days
Daylight
12 h 18 min
6:11 AM – 6:27 PM
Cloud cover
55%
1st clearest
Wind
6 mph
10th windiest
Solar energy
4.26 kWh/m²
Travel score
6.8
out of 10

Alliance is city in Stark and Mahoning counties in the U.S. state of Ohio.

Density
950/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 78°F in the first days to 69°F by the end.

A typical September day in Alliance reaches about 74°F in the afternoon and slips back to 55°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 63°F and 84°F. Set against its neighbours, September runs about 6°F cooler than August and about 12°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
17860
27860
37859
47859
57759
67758
77758
87658
97658
107657
117557
127556
137556
147456
157455
167455
177355
187354
197354
207253
217253
227153
237152
247152
257052
267051
277051
286951
296950
306850

How September really feels in Alliance

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.

Alliance weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan35° / 21°3.311.67.99.40.0
Feb38° / 23°2.6106.310.40.0
Mar47° / 30°3.712.34.511.71.5
Apr60° / 41°4.313.61.513.14.3
May70° / 51°4.213.6014.35.8
Jun78° / 60°4.212.8014.96.2
Jul82° / 64°3.912.8014.66.0
Aug80° / 62°3.511.1013.66.4
Sep74° / 55°3.69.8012.36.8
Oct62° / 44°3.310.90.210.95.0
Nov49° / 35°3.210.72.29.72.0
Dec39° / 27°3.211.15.49.10.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 49%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15644
25545
35545
45545
55545
65545
75446
85446
95446
105248
115248
125248
135149
145149
155149
165050
175050
184951
194951
204951
214951
224951
234951
245050
254951
264951
275050
284951
294951
305050

Chance of precipitation in September

Any precipitation

Alliance gets around 3.6 in of rain over 9.8 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 33% and peaks near 34% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
132
232
332
432
532
633
733
833
933
1033
1133
1233
1333
1433
1532
1632
1732
1832
1932
2032
2132
2232
2333
2433
2533
2634
2734
2834
2934
3034

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 48% of days. Sticky, muggy-or-worse air turns up on roughly 12% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1262524213
2272624203
3282623203
4292623193
5312622183
6322622172
7332721162
8352721162
9362721152
10382620142
11392620132
12412619131
13422619121
14442519111
15452518111
16472417101
17492417101
1852231690
1954221680
2056211580
2157211570
2259201470
2362191360
2463181360
2564181260
2666171250
2767171150
2868161150
2970161040
3071151040

Wind in September

Winds average 6 mph in September.

Across September, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 13 hours at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 84 minutes over September. Sunrise moves from 5:55 AM to 6:25 AM, and sunset from 6:53 PM to 6:02 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:556:53
212.95:566:51
312.95:576:49
412.85:586:48
512.86:006:46
612.76:016:44
712.76:026:43
812.66:036:41
912.66:046:39
1012.56:056:37
1112.56:066:36
1212.56:076:34
1312.46:086:32
1412.46:096:30
1512.36:106:29
1612.36:116:27
1712.26:126:25
1812.26:136:23
1912.16:146:21
2012.16:156:20
2112.06:166:18
2212.06:176:16
2311.96:186:14
2411.96:196:13
2511.86:206:11
2611.86:216:09
2711.86:226:07
2811.76:236:06
2911.76:246:04
3011.66:256:02

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.26 kWh/m².

For context, solar energy here swings from a low near 1.46 kWh/m² to a high of 6.06 kWh/m² in June across the year — September's 4.26 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.7Bright
54.7Bright
64.6Bright
74.6Bright
84.5Bright
94.5Bright
104.5Bright
114.4Bright
124.4Bright
134.4Bright
144.3Bright
154.3Bright
164.3Bright
174.2Bright
184.2Bright
194.2Bright
204.1Bright
214.1Bright
224.0Bright
234.0Moderate
243.9Moderate
253.9Moderate
263.8Moderate
273.8Moderate
283.8Moderate
293.7Moderate
303.7Moderate
Planning a trip in September

Is September a good time to visit Alliance?

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

6.8
Sightseeing
1st-best month of the year
5.3
Beach & pool
4th-best month of the year

September is a reasonable time to visit Alliance for sightseeing.

What to pack for Alliance in September

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

In September, Alliance sees daytime highs around 74°F and nights near 55°F. Worth packing: light clothes and rain gear. About 10 days see rain.

light clothesrain gear

UV index in Alliance in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Alliance peaks around June 22 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 22UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug7Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec2Low

Air quality in Alliance 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 Alliance is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (November, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1116 µg/m³Nov 137 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb11Good
Mar11Good
Apr12Good
May14Moderate
Jun16Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov7Good
Dec8Good
Location & terrain

Where is Alliance?

Alliance sits at 40.9°N, 81.1°W, 1,158 ft above sea level, in United States. The nearest listed city is North Canton, 16 mi away.

Topography around Alliance

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

Within 2 miles, the terrain around Alliance has only modest variations in elevation — a maximum elevation change of 276 ft around an average of 1,138 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 397 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 883 ft.

The land around Alliance is covered by trees (51%) and grassland (27%) within 2 miles, trees (39%), cropland (30%) and grassland (27%) within 10 miles, and trees (62%) and grassland (22%) within 50 miles.

2 miles
276 ft
10 miles
397 ft
50 miles
883 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: North Canton 16 mi · Canton 16 mi · Green 20 mi · Kent 21 mi · Tallmadge 22 mi · Austintown 22 mi · Massillon 23 mi · Stow 24 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 Alliance (40.9153°, -81.1059°, elevation 1,158 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).