Millville weather in September

In September, Millville sees average daytime highs of 78°F and overnight lows near 62°F, with 4.0 in of rain across 9.2 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Highs ease over the month, from about 81°F in the first days to 73°F by the end. The sky is clear or mostly clear about 38% 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 Millville's 2nd-clearest and 10th-windiest month. For the whole year in context, see Millville's year-round climate.

Daytime high
78°
4th warmest
Overnight low
62°
9th coldest
Rainfall
4.0 in
9.2 wet days
Daylight
12 h 18 min
5:47 AM – 6:02 PM
Cloud cover
55%
2nd clearest
Wind
6 mph
10th windiest
Solar energy
4.41 kWh/m²
Travel score
6.9
out of 10

Millville is city in Cumberland County, New Jersey, United States.

Density
245/km²
people per km²
Founded
1720

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 81°F in the first days to 73°F by the end.

A typical September day in Millville reaches about 78°F in the afternoon and slips back to 62°F overnight — a 16°F spread between the day's warmth and the night's chill. On most days the high lands between 69°F and 85°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)
18266
28266
38266
48165
58165
68165
78065
88064
98064
108064
117963
127963
137963
147862
157862
167862
177761
187761
197760
207660
217660
227659
237559
247559
257458
267458
277458
287357
297357
307357

How September really feels in Millville

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.

Millville weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan42° / 29°3.19.13.19.50.3
Feb45° / 30°3.08.7310.51.0
Mar53° / 37°4.010.41.711.73.0
Apr64° / 46°3.410.30.3135.6
May73° / 55°3.410.8014.16.5
Jun82° / 65°3.811014.75.9
Jul86° / 70°3.811.7014.54.8
Aug84° / 69°4.611013.55.5
Sep78° / 62°4.09.2012.36.9
Oct67° / 51°3.78.30116.4
Nov56° / 40°2.97.60.29.84.0
Dec47° / 33°3.79.31.59.31.5

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 14% of September, with mostly cloudy or overcast conditions the remaining 48%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15347
25347
35446
45446
55347
65347
75446
85446
95446
105446
115347
125446
135446
145347
155347
165248
175248
185149
195050
205050
215050
225050
235050
245149
255149
265149
275149
285248
295248
305347

Chance of precipitation in September

Any precipitation

Millville gets around 4.0 in of rain over 9.2 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 30% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
130
230
330
430
530
630
730
830
930
1029
1129
1229
1329
1429
1529
1629
1729
1829
1929
2030
2130
2230
2331
2431
2531
2630
2730
2830
2930
3030

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 31% of days. Sticky, muggy-or-worse air turns up on roughly 29% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
114182424191
214182424191
315192423181
416192422181
517192422171
619202421171
720202321160
821202320150
922202320140
1023212320140
1124212220130
1226202220120
1327202220110
1429202220100
153020212090
163120212080
173320212070
183419212060
193519201960
203619201950
213819201950
223919201940
234019191840
244218191730
254318191730
264518191630
274618181530
284717181520
294917181420
305117171320

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
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 5:33 AM to 6:00 AM, and sunset from 6:27 PM to 5:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:336:27
212.95:346:25
312.85:356:24
412.85:366:22
512.75:366:21
612.75:376:19
712.65:386:17
812.65:396:16
912.65:406:14
1012.55:416:12
1112.55:426:11
1212.45:436:09
1312.45:446:07
1412.35:456:05
1512.35:466:04
1612.35:476:02
1712.25:486:00
1812.25:495:59
1912.15:505:57
2012.15:515:55
2112.05:525:54
2212.05:535:52
2311.95:545:50
2411.95:555:49
2511.95:555:47
2611.85:565:45
2711.85:575:44
2811.75:585:42
2911.75:595:40
3011.66:005:39

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.41 kWh/m².

For context, solar energy here swings from a low near 1.91 kWh/m² to a high of 6.3 kWh/m² in June across the year — September's 4.41 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
34.9Bright
44.9Bright
54.8Bright
64.8Bright
74.8Bright
84.7Bright
94.7Bright
104.7Bright
114.6Bright
124.6Bright
134.5Bright
144.5Bright
154.5Bright
164.4Bright
174.4Bright
184.3Bright
194.3Bright
204.3Bright
214.2Bright
224.2Bright
234.1Bright
244.1Bright
254.0Bright
264.0Bright
274.0Moderate
283.9Moderate
293.9Moderate
303.9Moderate
Planning a trip in September

Hazard calendar for Millville

In seasonPeak

In September, Millville sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Millville sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Millville?

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

6.9
Sightseeing
1st-best month of the year
6.3
Beach & pool
4th-best month of the year

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

What to pack for Millville in September

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

In September, Millville sees daytime highs around 78°F and nights near 62°F. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

Sea temperature near Millville in September

The nearest coast averages about 73°F in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 20 mi away) is warmest in August at about 76°F and coldest in February near 37°F.

It's comfortable for a long swim from Jun 20 to Oct 3 — about 3.5 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan39Bracing
Feb37Bracing
Mar41Bracing
Apr48Bracing
May57Bracing
Jun67Cool
Jul74Refreshing
Aug76Warm
Sep73Refreshing
Oct65Cool
Nov54Bracing
Dec45Bracing

UV index in Millville 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 Millville peaks around July 11 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 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 highHighModerateLowJul 11UV 8Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Millville 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 Millville is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.0× the cleanest month (November, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1317 µg/m³Nov 129 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar15Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul18Moderate
Aug15Moderate
Sep12Good
Oct9Good
Nov9Good
Dec10Good
Location & terrain

Where is Millville?

Millville sits at 39.4°N, 75.0°W, 39 ft above sea level, in United States. The nearest listed city is South Vineland, 3.1 mi away.

Topography around Millville

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

Within 2 miles, the terrain around Millville has only modest variations in elevation — a maximum elevation change of 128 ft around an average of 52 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 174 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 748 ft.

The land around Millville is covered by trees (50%) and artificial surfaces (22%) within 2 miles, trees (68%) within 10 miles, and trees (43%) and water (30%) within 50 miles.

2 miles
128 ft
10 miles
174 ft
50 miles
748 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: South Vineland 3.1 mi · Vineland 5.6 mi · Bridgeton 11 mi · Williamstown 20 mi · Glassboro 21 mi · Sicklerville 22 mi · Sewell 26 mi · Pleasantville 27 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 Millville (39.4021°, -75.0393°, elevation 39 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).