Long Beach weather in September

In September, Long Beach sees average daytime highs of 73°F and overnight lows near 64°F, with 3.8 in of rain across 9.1 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 76°F in the first days to 69°F by the end. The sky is clear or mostly clear about 40% 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 Long Beach's 2nd-clearest and 8th-windiest month. For the whole year in context, see Long Beach's year-round climate.

Daytime high
73°
4th warmest
Overnight low
64°
9th coldest
Rainfall
3.8 in
9.1 wet days
Daylight
12 h 18 min
5:41 AM – 5:57 PM
Cloud cover
54%
2nd clearest
Wind
10 mph
8th windiest
Solar energy
4.31 kWh/m²
Travel score
7.0
out of 10

Long Beach is city in Nassau County, New York, United States, suburb of NYC.

Density
3,326/km²
people per km²
Founded
1623

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 76°F in the first days to 69°F by the end.

A typical September day in Long Beach reaches about 73°F in the afternoon and slips back to 64°F overnight — a 9°F spread between the day's warmth and the night's chill. On most days the high lands between 67°F and 79°F. Set against its neighbours, September runs about 5°F cooler than August and about 10°F warmer than October.

50°60°70°80°151015202530
Avg high (°F)Avg low (°F)
17768
27668
37668
47667
57667
67667
77567
87566
97566
107566
117465
127465
137465
147465
157364
167364
177364
187263
197263
207263
217162
227162
237162
247162
257061
267061
277060
286960
296960
306959

How September really feels in Long Beach

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.

Long Beach weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan40° / 30°3.810.13.79.40.0
Feb41° / 30°3.69.33.610.40.1
Mar46° / 36°4.610.52.711.71.3
Apr55° / 45°3.810.90.3133.4
May64° / 54°3.510.8014.25.5
Jun73° / 64°3.710.2014.86.7
Jul79° / 71°3.49.7014.66.7
Aug78° / 70°3.89.6013.66.8
Sep73° / 64°3.89.1012.37.0
Oct63° / 54°4.38.8010.95.8
Nov53° / 43°3.58.80.29.73.2
Dec45° / 35°4.610.31.99.21.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 46%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25842
35644
45644
55644
65644
75644
85644
95644
105644
115644
125644
135545
145644
155545
165446
175446
185347
195347
205248
215347
225248
235248
245248
255248
265248
275248
285347
295347
305347

Chance of precipitation in September

Any precipitation

Long Beach gets around 3.8 in of rain over 9.1 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 32% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
126
226
327
427
527
627
727
828
928
1028
1128
1229
1329
1429
1529
1629
1730
1830
1930
2031
2131
2231
2332
2432
2532
2632
2732
2831
2931
3031

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 30% of days. Sticky, muggy-or-worse air turns up on roughly 27% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
11219262816
21319262715
31419262615
41519262615
51619262514
61719262513
71819262413
81919262412
92119252311
102219252310
11241925239
12251925228
13261925228
14281925227
15291925216
16311925215
17321925204
18331925203
19341924203
20351924192
21371924192
22381923182
23392022171
24412022171
25422021161
26432020151
27442120151
28462119141
29472118131
30482117131

Wind in September

Winds average 10 mph in September.

Across September, daily wind ranges from about 9 mph on the calmest days to 11 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
19light breeze
29light breeze
39light breeze
49light breeze
510light breeze
610light breeze
710light breeze
810light breeze
910light breeze
1010light breeze
1110light breeze
1210light breeze
1310light breeze
1410light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2911light breeze
3011light breeze

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 5:26 AM to 5:55 AM, and sunset from 6:23 PM to 5:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:266:23
212.95:276:21
312.95:286:19
412.85:296:18
512.85:306:16
612.75:316:14
712.75:326:13
812.65:336:11
912.65:346:09
1012.55:356:07
1112.55:366:06
1212.45:376:04
1312.45:386:02
1412.45:396:00
1512.35:405:59
1612.35:415:57
1712.25:425:55
1812.25:435:53
1912.15:445:52
2012.15:455:50
2112.05:465:48
2212.05:475:46
2311.95:485:45
2411.95:495:43
2511.95:505:41
2611.85:515:39
2711.85:525:38
2811.75:535:36
2911.75:545:34
3011.65:555:33

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.31 kWh/m².

For context, solar energy here swings from a low near 1.77 kWh/m² to a high of 6.19 kWh/m² in June across the year — September's 4.31 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.8Bright
54.8Bright
64.7Bright
74.7Bright
84.7Bright
94.6Bright
104.6Bright
114.5Bright
124.5Bright
134.4Bright
144.4Bright
154.4Bright
164.3Bright
174.3Bright
184.2Bright
194.2Bright
204.1Bright
214.1Bright
224.0Bright
234.0Bright
244.0Moderate
253.9Moderate
263.9Moderate
273.8Moderate
283.8Moderate
293.8Moderate
303.7Moderate
Planning a trip in September

Hazard calendar for Long Beach

In seasonPeak

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

Long Beach 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 Long Beach?

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

7.0
Sightseeing
1st-best month of the year
5.3
Beach & pool
3rd-best month of the year

September is one of the better times to visit Long Beach for general sightseeing.

What to pack for Long Beach in September

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

In September, Long Beach sees daytime highs around 73°F and nights near 64°F. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

Sea temperature near Long Beach in September

The nearest coast averages about 70°F in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 73°F and coldest in February near 40°F.

It's comfortable for a long swim from Jun 30 to Sep 25 — about 2.9 months when the water holds above 68°F.

40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan43Bracing
Feb40Bracing
Mar40Bracing
Apr46Bracing
May55Bracing
Jun65Cool
Jul72Refreshing
Aug73Refreshing
Sep70Refreshing
Oct63Cool
Nov55Bracing
Dec48Bracing

UV index in Long Beach 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 Long Beach peaks around July 12 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 1 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJul 12UV 8Dec 21UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May7Very high
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov3Moderate
Dec1Low

Air quality in Long Beach 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 Long Beach is worst in July — around 19 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (November, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1018 µg/m³Nov 169 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar15Moderate
Apr16Moderate
May18Moderate
Jun18Moderate
Jul19Moderate
Aug16Moderate
Sep13Moderate
Oct10Good
Nov9Good
Dec10Good
Location & terrain

Where is Long Beach?

Long Beach sits at 40.6°N, 73.7°W, 0 ft above sea level, in United States. The nearest listed city is Oceanside, 3.7 mi away.

Topography around Long Beach

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

Within 2 miles, the terrain around Long Beach has only modest variations in elevation — a maximum elevation change of 46 ft around an average of 3 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 157 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,535 ft.

The land around Long Beach is covered by water (58%) and artificial surfaces (24%) within 2 miles, water (59%) and artificial surfaces (23%) within 10 miles, and water (43%) and trees (39%) within 50 miles.

2 miles
46 ft
10 miles
157 ft
50 miles
1,535 ft
treesgrasslandartificial surfacesbare terrainwaterwetland
September weather nearby: Oceanside 3.7 mi · Woodmere 4.3 mi · Lynbrook 4.3 mi · Rockville Centre 5.0 mi · Far Rockaway 5.0 mi · Baldwin 5.6 mi · Valley Stream 5.6 mi · Freeport 6.2 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 Long Beach (40.5884°, -73.6579°, elevation 0 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).