Morgantown weather in September

In September, Morgantown sees average daytime highs of 74°F and overnight lows near 56°F, with 4.0 in of rain across 10.3 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 70°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 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Morgantown's 1st-clearest and 10th-windiest month. For the whole year in context, see Morgantown's year-round climate.

Daytime high
74°
4th warmest
Overnight low
56°
9th coldest
Rainfall
4.0 in
10.3 wet days
Daylight
12 h 18 min
6:06 AM – 6:22 PM
Cloud cover
55%
1st clearest
Wind
5 mph
10th windiest
Solar energy
4.27 kWh/m²
Travel score
6.8
out of 10

Morgantown is city in and county seat of Monongalia County, West Virginia, United States.

Density
1,117/km²
people per km²
Founded
1772

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 70°F by the end.

A typical September day in Morgantown reaches about 74°F in the afternoon and slips back to 56°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 65°F and 84°F. Set against its neighbours, September runs about 6°F cooler than August and about 11°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
17961
27861
37860
47860
57860
67859
77759
87759
97758
107658
117658
127657
137557
147557
157556
167456
177456
187455
197355
207355
217354
227254
237254
247253
257153
267153
277152
287052
297051
306951

How September really feels in Morgantown

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.

Morgantown 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
Jan38° / 24°3.913.179.50.0
Feb42° / 26°3.611.66.210.40.3
Mar51° / 33°4.613.8411.72.2
Apr63° / 44°4.614.50.9134.7
May70° / 52°5.215.5014.25.7
Jun78° / 61°5.314.6014.76.0
Jul81° / 64°5.115.1014.55.7
Aug80° / 63°3.912.1013.66.2
Sep74° / 56°4.010.3012.36.8
Oct63° / 45°3.6110.310.95.4
Nov52° / 36°3.610.51.79.82.6
Dec42° / 29°3.912.45.29.30.3

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 20% of September, with mostly cloudy or overcast conditions the remaining 47%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15743
25743
35743
45743
55644
65644
75644
85545
95545
105545
115347
125347
135347
145347
155248
165248
175149
185149
195149
205149
215149
225248
235248
245248
255347
265347
275248
285248
295347
305347

Chance of precipitation in September

Any precipitation

Morgantown gets around 4.0 in of rain over 10.3 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 36% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
134
234
333
433
533
633
733
832
932
1032
1132
1232
1332
1432
1532
1632
1733
1833
1934
2034
2135
2235
2335
2436
2536
2636
2736
2836
2935
3035

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 41% of days. Sticky, muggy-or-worse air turns up on roughly 14% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1202226275
2212326265
3222325254
4242325244
5252424234
6272424223
7282423213
8302523202
9312523192
10332523182
11342523171
12362523151
13372522141
14392522131
15402522120
16422522110
17432522100
1845252190
1946242180
2048242180
2150232070
2252231960
2352231960
2455221850
2556221750
2659211640
2759211640
2861201540
2963201430
3064201330

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
175calm
185calm
195calm
205calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min 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 78 minutes over September. Sunrise moves from 5:52 AM to 6:20 AM, and sunset from 6:47 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:526:47
212.95:536:45
312.85:546:44
412.85:556:42
512.75:566:40
612.75:576:39
712.75:586:37
812.65:596:35
912.66:006:34
1012.56:016:32
1112.56:026:30
1212.46:036:29
1312.46:046:27
1412.36:056:25
1512.36:066:24
1612.36:066:22
1712.26:076:20
1812.26:086:18
1912.16:096:17
2012.16:106:15
2112.06:116:13
2212.06:126:12
2311.96:136:10
2411.96:146:08
2511.96:156:07
2611.86:166:05
2711.86:176:03
2811.76:186:01
2911.76:196:00
3011.66:205:58

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.27 kWh/m².

For context, solar energy here swings from a low near 1.57 kWh/m² to a high of 5.97 kWh/m² in June across the year — September's 4.27 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.8Bright
34.8Bright
44.8Bright
54.7Bright
64.7Bright
74.7Bright
84.6Bright
94.6Bright
104.5Bright
114.5Bright
124.5Bright
134.4Bright
144.4Bright
154.3Bright
164.3Bright
174.2Bright
184.2Bright
194.1Bright
204.1Bright
214.0Bright
224.0Moderate
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 Morgantown?

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
5.4
Beach & pool
4th-best month of the year

September is a reasonable time to visit Morgantown for sightseeing.

What to pack for Morgantown in September

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

In September, Morgantown sees daytime highs around 74°F and nights near 56°F. Worth packing: light clothes and rain gear. About 10 days see rain.

light clothesrain gear

UV index in Morgantown 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 Morgantown peaks around June 19 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJun 19UV 9Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Morgantown 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 Morgantown is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (November, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1217 µg/m³Nov 187 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar10Good
Apr11Good
May14Moderate
Jun17Moderate
Jul17Moderate
Aug15Moderate
Sep12Good
Oct8Good
Nov7Good
Dec7Good
Location & terrain

Where is Morgantown?

Morgantown sits at 39.6°N, 80.0°W, 889 ft above sea level, in United States. The nearest listed city is Fairmont, 14 mi away.

Topography around Morgantown

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

Within 2 miles, the terrain around Morgantown has only modest variations in elevation — a maximum elevation change of 551 ft around an average of 1,030 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,631 ft; within 50 miles, large variations in elevation — a maximum elevation change of 3,570 ft.

The land around Morgantown is covered by trees (56%) and artificial surfaces (26%) within 2 miles, trees (77%) within 10 miles, and trees (83%) within 50 miles.

2 miles
551 ft
10 miles
1,631 ft
50 miles
3,570 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Fairmont 14 mi · Clarksburg 32 mi · Bethel Park 48 mi · Baldwin 49 mi · Upper Saint Clair 49 mi · McKeesport 50 mi · Mount Lebanon 50 mi · Wheeling 50 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 Morgantown (39.6295°, -79.9559°, elevation 889 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).