Niles weather in September

In September, Niles sees average daytime highs of 73°F and overnight lows near 55°F, with 3.7 in of rain across 10.4 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 77°F in the first days to 69°F by the end. The sky is clear or mostly clear about 33% 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 Niles's 1st-clearest and 9th-windiest month. For the whole year in context, see Niles's year-round climate.

Daytime high
73°
4th warmest
Overnight low
55°
9th coldest
Rainfall
3.7 in
10.4 wet days
Daylight
12 h 18 min
6:09 AM – 6:25 PM
Cloud cover
55%
1st clearest
Wind
6 mph
9th windiest
Solar energy
4.22 kWh/m²
Travel score
6.7
out of 10

Niles is city in Trumbull County, Ohio, United States.

Density
834/km²
people per km²
Founded
1806

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 77°F in the first days to 69°F by the end.

A typical September day in Niles reaches about 73°F in the afternoon and slips back to 55°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 63°F and 83°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
27859
37759
47759
57759
67658
77658
87658
97657
107557
117557
127456
137456
147456
157455
167355
177355
187354
197254
207253
217153
227153
237152
247052
257052
266951
276951
286951
296850
306850

How September really feels in Niles

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.

Niles 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°3.312.49.19.40.0
Feb37° / 22°2.610.36.910.30.0
Mar47° / 30°3.712.24.911.71.3
Apr59° / 40°4.313.91.613.14.2
May69° / 50°4.113.6014.35.8
Jun78° / 59°4.513.3014.96.2
Jul81° / 64°4.013.2014.76.0
Aug80° / 62°3.611013.66.5
Sep73° / 55°3.710.4012.36.7
Oct61° / 44°3.411.60.210.94.9
Nov49° / 35°3.311.22.79.71.9
Dec39° / 27°3.311.76.49.10.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15743
25743
35644
45545
55545
65545
75446
85347
95347
105347
115149
125149
135149
145050
155050
165050
174951
185050
195050
204951
215050
225050
235050
245149
255050
265050
274951
284951
294951
304951

Chance of precipitation in September

Any precipitation

Niles gets around 3.7 in of rain over 10.4 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 34% and peaks near 37% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
133
233
333
434
534
634
734
834
934
1034
1134
1234
1334
1434
1534
1634
1733
1833
1933
2034
2134
2234
2335
2435
2536
2636
2737
2837
2937
3037

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 47% 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 (%)
1252624224
2262623213
3272723203
4282722193
5302822183
6312821173
7332820163
8342820153
9362820142
10372819142
11392719132
12402719122
13422718121
14442618111
15452517111
16472517101
17492417101
1851231691
1954221680
2055221580
2157211570
2259201470
2362191360
2462191360
2565181250
2666171250
2767171150
2868161150
2970161040
3071151040

Wind in September

Winds average 6 mph in September.

Across September, daily wind ranges from about 5 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
15calm
25calm
35calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
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 5:54 AM to 6:24 AM, and sunset from 6:52 PM to 6:01 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:546:52
212.95:556:50
312.95:566:48
412.85:576:47
512.85:586:45
612.75:596:43
712.76:006:41
812.66:016:40
912.66:026:38
1012.66:036:36
1112.56:046:34
1212.56:056:33
1312.46:066:31
1412.46:076:29
1512.36:086:27
1612.36:096:25
1712.26:106:24
1812.26:116:22
1912.16:126:20
2012.16:136:18
2112.06:146:17
2212.06:166:15
2311.96:176:13
2411.96:186:11
2511.86:196:09
2611.86:206:08
2711.86:216:06
2811.76:226:04
2911.76:236:02
3011.66:246:01

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.22 kWh/m².

For context, solar energy here swings from a low near 1.39 kWh/m² to a high of 6.08 kWh/m² in June across the year — September's 4.22 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.7Bright
34.7Bright
44.7Bright
54.6Bright
64.6Bright
74.5Bright
84.5Bright
94.5Bright
104.4Bright
114.4Bright
124.3Bright
134.3Bright
144.3Bright
154.2Bright
164.2Bright
174.2Bright
184.1Bright
194.1Bright
204.1Bright
214.0Bright
224.0Moderate
233.9Moderate
243.9Moderate
253.8Moderate
263.8Moderate
273.8Moderate
283.7Moderate
293.7Moderate
303.6Moderate
Planning a trip in September

Is September a good time to visit Niles?

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

6.7
Sightseeing
1st-best month of the year
5.1
Beach & pool
4th-best month of the year

September is a reasonable time to visit Niles for sightseeing.

What to pack for Niles in September

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

In September, Niles sees daytime highs around 73°F and nights near 55°F. Worth packing: light clothes and rain gear. About 10 days see rain.

light clothesrain gear

UV index in Niles 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 Niles peaks around June 22 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 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 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug7Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec2Low

Air quality in Niles 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 Niles 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 Niles?

Niles sits at 41.2°N, 80.8°W, 879 ft above sea level, in United States. The nearest listed city is Warren, 5.0 mi away.

Topography around Niles

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

Within 2 miles, the terrain around Niles has only modest variations in elevation — a maximum elevation change of 269 ft around an average of 919 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 463 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,175 ft.

The land around Niles is covered by trees (65%) within 2 miles, trees (61%) and grassland (22%) within 10 miles, and trees (66%) within 50 miles.

2 miles
269 ft
10 miles
463 ft
50 miles
1,175 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Warren 5.0 mi · Austintown 5.6 mi · Youngstown 8.1 mi · Boardman 12 mi · Hermitage 17 mi · New Castle 25 mi · Alliance 25 mi · Streetsboro 30 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 Niles (41.1828°, -80.7654°, elevation 879 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).