Hawthorne weather in September

In September, Hawthorne sees average daytime highs of 75°F and overnight lows near 58°F, with 4.3 in of rain across 9.4 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 1st-wettest month of the year here.

Highs ease over the month, from about 79°F in the first days to 70°F by the end. The sky is clear or mostly clear about 36% 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 Hawthorne's 2nd-clearest and 9th-windiest month. For the whole year in context, see Hawthorne's year-round climate.

Daytime high
75°
4th warmest
Overnight low
58°
9th coldest
Rainfall
4.3 in
9.4 wet days
Daylight
12 h 18 min
5:43 AM – 5:59 PM
Cloud cover
56%
2nd clearest
Wind
6 mph
9th windiest
Solar energy
4.17 kWh/m²
Travel score
6.9
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 79°F in the first days to 70°F by the end.

A typical September day in Hawthorne reaches about 75°F in the afternoon and slips back to 58°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 66°F and 84°F. Set against its neighbours, September runs about 7°F cooler than August and about 12°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
17963
27962
37962
47962
57862
67861
77861
87761
97760
107760
117660
127659
137659
147558
157558
167558
177457
187457
197457
207356
217356
227256
237255
247255
257155
267154
277154
287053
297053
306953

How September really feels in Hawthorne

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.

Hawthorne weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 1st-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan37° / 24°3.59.25.29.40.0
Feb40° / 25°3.08.54.310.40.1
Mar48° / 32°4.310.53.811.71.7
Apr60° / 42°3.810.70.713.14.6
May69° / 52°3.812014.36.1
Jun79° / 61°4.111.7014.96.3
Jul84° / 67°4.310.8014.65.5
Aug82° / 65°4.010.6013.66.2
Sep75° / 58°4.39.4012.36.9
Oct63° / 47°4.18.70.210.95.7
Nov51° / 37°3.38.30.89.72.8
Dec42° / 29°4.19.93.69.10.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% 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 49%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15050
25050
35050
44951
55050
65050
75050
85050
95149
105149
115149
125248
135248
145149
155248
165248
175149
185149
195149
205050
215050
225149
235149
245149
255050
265149
275149
285149
295149
305149

Chance of precipitation in September

Any precipitation

Hawthorne gets around 4.3 in of rain over 9.4 wet days in September, the wettest month. 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 32% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
128
228
328
428
529
629
729
830
930
1030
1130
1230
1330
1430
1530
1630
1730
1831
1931
2031
2131
2232
2332
2432
2531
2631
2731
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 45% of days. Sticky, muggy-or-worse air turns up on roughly 15% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1292323196
2302322196
3302422186
4312421186
5322420176
6332420176
7342519166
8342519166
9352518165
10362618155
11372618155
12382517145
13402517144
14412517134
15432417133
16442417123
17462317113
18472217112
19492217102
20502117102
2152201792
2254191791
2356181781
2456181781
2559171671
2659171671
2763161560
2863161560
2965151550
3066151450

Wind in September

Winds average 6 mph in September.

Across September, daily wind ranges from about 6 mph on the calmest days to 6 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
266calm
276calm
286calm
296calm
306calm

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 5:28 AM to 5:57 AM, and sunset from 6:25 PM to 5:34 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:286:25
212.95:296:23
312.95:306:22
412.85:316:20
512.85:326:18
612.75:336:17
712.75:346:15
812.65:356:13
912.65:366:11
1012.55:376:10
1112.55:386:08
1212.55:396:06
1312.45:406:04
1412.45:416:03
1512.35:426:01
1612.35:435:59
1712.25:445:57
1812.25:455:55
1912.15:465:54
2012.15:475:52
2112.05:485:50
2212.05:495:48
2311.95:505:47
2411.95:515:45
2511.85:525:43
2611.85:535:41
2711.85:545:40
2811.75:555:38
2911.75:565:36
3011.65:575:34

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.17 kWh/m².

For context, solar energy here swings from a low near 1.72 kWh/m² to a high of 5.94 kWh/m² in June across the year — September's 4.17 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.8Bright
24.7Bright
34.7Bright
44.6Bright
54.6Bright
64.6Bright
74.5Bright
84.5Bright
94.4Bright
104.4Bright
114.4Bright
124.3Bright
134.3Bright
144.3Bright
154.2Bright
164.2Bright
174.1Bright
184.1Bright
194.0Bright
204.0Bright
214.0Moderate
223.9Moderate
233.9Moderate
243.8Moderate
253.8Moderate
263.8Moderate
273.7Moderate
283.7Moderate
293.6Moderate
303.6Moderate
Planning a trip in September

Hazard calendar for Hawthorne

In seasonPeak

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

Hawthorne 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 Hawthorne?

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
5.6
Beach & pool
4th-best month of the year

September is a reasonable time to visit Hawthorne for sightseeing.

What to pack for Hawthorne in September

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

In September, Hawthorne sees daytime highs around 75°F and nights near 58°F. Worth packing: light clothes and rain gear. About 9 days see rain.

light clothesrain gear

Sea temperature near Hawthorne in September

The nearest coast averages about 71°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 27 mi away) is warmest in August at about 74°F and coldest in February near 40°F.

It's comfortable for a long swim from Jun 30 to Sep 26 — 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
Mar41Bracing
Apr46Bracing
May55Bracing
Jun65Cool
Jul72Refreshing
Aug74Refreshing
Sep71Refreshing
Oct63Cool
Nov55Bracing
Dec48Bracing

UV index in Hawthorne 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 Hawthorne peaks around July 11 at about 8 (very high) — sunscreen and a hat are worth it in the middle of the day. It bottoms out near December 22 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 11UV 8Dec 22UV 1
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May7Very high
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Hawthorne 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 Hawthorne is worst in July — around 17 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (November, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1317 µg/m³Nov 159 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar14Moderate
Apr14Moderate
May16Moderate
Jun16Moderate
Jul17Moderate
Aug15Moderate
Sep13Moderate
Oct10Good
Nov9Good
Dec10Good
Location & terrain

Where is Hawthorne?

Hawthorne sits at 40.9°N, 74.2°W, 82 ft above sea level, in United States. The nearest listed city is Fair Lawn, 1.2 mi away.

Topography around Hawthorne

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

Within 2 miles, the terrain around Hawthorne has only modest variations in elevation — a maximum elevation change of 604 ft around an average of 174 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,109 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,008 ft.

The land around Hawthorne is covered by trees (52%) and artificial surfaces (41%) within 2 miles, trees (67%) and artificial surfaces (25%) within 10 miles, and trees (64%) within 50 miles.

2 miles
604 ft
10 miles
1,109 ft
50 miles
2,008 ft
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Fair Lawn 1.2 mi · Paterson 2.5 mi · Ridgewood 3.1 mi · Elmwood Park 3.7 mi · Paramus 4.3 mi · Wyckoff 4.3 mi · Garfield 5.0 mi · Lodi 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 Hawthorne (40.9493°, -74.1538°, elevation 82 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).