Brighton weather in September

In September, Brighton sees average daytime highs of 71°F and overnight lows near 58°F, with 3.4 in of rain across 10.7 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 74°F in the first days to 66°F by the end. The sky is clear or mostly clear about 34% 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 Brighton's 3rd-clearest and 8th-windiest month. For the whole year in context, see Brighton's year-round climate.

Daytime high
71°
3rd warmest
Overnight low
58°
9th coldest
Rainfall
3.4 in
10.7 wet days
Daylight
12 h 18 min
5:56 AM – 6:13 PM
Cloud cover
55%
3rd clearest
Wind
9 mph
8th windiest
Solar energy
4.09 kWh/m²
Travel score
6.5
out of 10

Brighton is town in Monroe County, New York, USA.

Founded
1814

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 74°F in the first days to 66°F by the end.

A typical September day in Brighton reaches about 71°F in the afternoon and slips back to 58°F overnight — a 12°F spread between the day's warmth and the night's chill. On most days the high lands between 61°F and 80°F. Set against its neighbours, September runs about 6°F cooler than August and about 12°F warmer than October.

40°50°60°70°80°151015202530
Avg high (°F)Avg low (°F)
17563
27463
37462
47462
57462
67462
77361
87361
97361
107360
117260
127260
137259
147159
157159
167158
177058
187058
197057
206957
216956
226956
236856
246855
256755
266755
276754
286654
296654
306553

How September really feels in Brighton

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.

Brighton weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan33° / 22°3.415.5149.20.0
Feb33° / 21°2.610.99.310.20.0
Mar39° / 28°3.111.75.911.60.1
Apr50° / 38°3.911.82.213.12.1
May60° / 48°3.211.4014.44.5
Jun70° / 58°3.511.5015.16.3
Jul77° / 65°3.511.1014.96.8
Aug76° / 65°3.211.7013.86.8
Sep71° / 58°3.410.7012.36.5
Oct59° / 48°4.313.30.110.84.1
Nov47° / 37°3.7143.99.51.4
Dec38° / 29°3.715.810.68.90.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 46%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16040
26040
35941
45941
55941
65842
75842
85644
95644
105545
115545
125545
135446
145446
155347
165248
175248
185248
195248
205248
215248
225149
235149
245050
254951
264951
274852
284852
294852
304753

Chance of precipitation in September

Any precipitation

Brighton gets around 3.4 in of rain over 10.7 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 36% and peaks near 41% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
133
233
334
434
534
635
735
836
936
1036
1136
1236
1336
1436
1535
1635
1735
1835
1935
2035
2135
2236
2336
2437
2538
2638
2739
2840
2941
3041

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 46% of days. Sticky, muggy-or-worse air turns up on roughly 10% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1252727193
2262726183
3272726173
4292725163
5302724162
6322724152
7332823142
8352723132
9362722122
10382722121
11392722111
12412721101
1342272191
1444262091
1545261981
1647261981
1748261870
1849261870
1952251760
2052251760
2155241650
2256241550
2358231450
2459231440
2561221340
2663221230
2765211130
2865211130
2967201030
306920920

Wind in September

Winds average 9 mph in September.

Across September, daily wind ranges from about 8 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
18light breeze
28light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light breeze

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 5:39 AM to 6:12 AM, and sunset from 6:41 PM to 5:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:396:41
213.05:406:39
312.95:416:37
412.95:426:36
512.85:436:34
612.85:456:32
712.75:466:30
812.75:476:28
912.65:486:26
1012.65:496:24
1112.55:506:23
1212.55:516:21
1312.45:526:19
1412.45:546:17
1512.35:556:15
1612.35:566:13
1712.25:576:11
1812.25:586:09
1912.15:596:08
2012.16:006:06
2112.06:026:04
2212.06:036:02
2311.96:046:00
2411.96:055:58
2511.86:065:56
2611.86:075:54
2711.76:085:53
2811.76:105:51
2911.66:115:49
3011.66:125:47

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.09 kWh/m².

For context, solar energy here swings from a low near 1.23 kWh/m² to a high of 6.26 kWh/m² in June across the year — September's 4.09 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.7Bright
34.7Bright
44.6Bright
54.5Bright
64.5Bright
74.5Bright
84.4Bright
94.4Bright
104.3Bright
114.3Bright
124.2Bright
134.2Bright
144.2Bright
154.1Bright
164.1Bright
174.0Bright
184.0Bright
194.0Moderate
203.9Moderate
213.9Moderate
223.8Moderate
233.8Moderate
243.7Moderate
253.7Moderate
263.6Moderate
273.6Moderate
283.5Moderate
293.5Moderate
303.4Moderate
Planning a trip in September

Is September a good time to visit Brighton?

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

6.5
Sightseeing
3rd-best month of the year
4.2
Beach & pool
3rd-best month of the year

September is a reasonable time to visit Brighton for sightseeing.

What to pack for Brighton in September

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

In September, Brighton sees daytime highs around 71°F and nights near 58°F. Worth packing: rain gear. About 11 days see rain.

rain gear

Sea temperature near Brighton in September

The nearest coast averages about 67°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 16 mi away) is warmest in August at about 72°F and coldest in March near 37°F.

It's comfortable for a long swim from Jul 16 to Sep 11 — about 1.9 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan39Bracing
Feb37Bracing
Mar37Bracing
Apr38Bracing
May42Bracing
Jun56Bracing
Jul69Refreshing
Aug72Refreshing
Sep67Cool
Oct58Bracing
Nov49Bracing
Dec43Bracing

UV index in Brighton 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 Brighton peaks around June 23 at about 8 (very high) — sunscreen, a hat and midday shade are essential. 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 highHighModerateLowJun 23UV 8Dec 22UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May7High
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Brighton?

Brighton sits at 43.1°N, 77.6°W, 446 ft above sea level, in United States. The nearest listed city is Rochester, 3.1 mi away.

Topography around Brighton

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

Within 2 miles, the terrain around Brighton has only modest variations in elevation — a maximum elevation change of 515 ft around an average of 453 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 699 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,067 ft.

The land around Brighton is covered by trees (67%) and artificial surfaces (24%) within 2 miles, trees (54%) within 10 miles, and water (37%) and trees (36%) within 50 miles.

2 miles
515 ft
10 miles
699 ft
50 miles
2,067 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Rochester 3.1 mi · Irondequoit 5.0 mi · Henrietta 6.8 mi · Gates-North Gates 7.5 mi · Batavia 34 mi · Auburn 52 mi · Oswego 57 mi · Lockport 57 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 Brighton (43.1476°, -77.5506°, elevation 446 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. 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).