Syracuse weather in September

In September, Syracuse sees average daytime highs of 71°F and overnight lows near 54°F, with 3.9 in of rain across 10.7 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 75°F in the first days to 66°F by the end. The sky is clear or mostly clear about 32% 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 Syracuse's 3rd-clearest and 9th-windiest month. For the whole year in context, see Syracuse's year-round climate.

Daytime high
71°
4th warmest
Overnight low
54°
9th coldest
Rainfall
3.9 in
10.7 wet days
Daylight
12 h 18 min
5:50 AM – 6:08 PM
Cloud cover
57%
3rd clearest
Wind
6 mph
9th windiest
Solar energy
3.99 kWh/m²
Travel score
6.4
out of 10

Syracuse is city in and county seat of Onondaga County, New York, United States.

Density
2,173/km²
people per km²
Founded
1848

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 75°F in the first days to 66°F by the end.

A typical September day in Syracuse reaches about 71°F in the afternoon and slips back to 54°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 61°F and 81°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)
17559
27559
37558
47558
57458
67458
77457
87457
97356
107356
117356
127256
137255
147255
157155
167154
177154
187053
197053
206953
216952
226952
236852
246851
256751
266751
276750
286650
296650
306549

How September really feels in Syracuse

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.

Syracuse weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan31° / 19°3.314.113.59.20.0
Feb33° / 19°2.91210.710.20.0
Mar41° / 26°3.713.37.711.60.4
Apr55° / 38°4.213.82.713.13.2
May67° / 49°3.913.30.114.45.6
Jun75° / 58°4.513.3015.16.3
Jul79° / 63°4.413.2014.86.2
Aug78° / 62°4.012.6013.86.5
Sep71° / 54°3.910.7012.36.4
Oct58° / 44°4.513.30.310.84.1
Nov46° / 34°3.713.94.69.51.2
Dec36° / 25°3.814.810.98.90.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% of September, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25446
35446
45347
55347
65248
75248
85149
95149
105050
114951
124852
134852
144951
154951
164852
174852
184852
194852
204852
214951
224951
234951
244951
254852
264852
274852
284852
294753
304753

Chance of precipitation in September

Any precipitation

Syracuse gets around 3.9 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 42% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
133
233
333
433
534
634
734
834
935
1035
1135
1236
1336
1436
1536
1636
1736
1836
1936
2036
2136
2237
2337
2438
2539
2640
2740
2841
2942
3042

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 50% of days. Sticky, muggy-or-worse air turns up on roughly 9% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1283026151
2293025151
3303024141
4323023141
5333022131
6353021131
7363021121
8383020111
9393019111
10413018101
11423017101
1244291790
1346291690
1447291580
1549281480
1650281480
1753271370
1854261370
1956251270
2058241260
2159231260
2260231250
2362221150
2464211140
2566201040
2667201030
2768191030
286919930
297118920
307317820

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
206calm
216calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 5:33 AM to 6:06 AM, and sunset from 6:35 PM to 5:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:336:35
213.05:346:33
312.95:366:32
412.95:376:30
512.85:386:28
612.85:396:26
712.75:406:24
812.75:416:22
912.65:426:21
1012.65:436:19
1112.55:456:17
1212.55:466:15
1312.45:476:13
1412.45:486:11
1512.35:496:09
1612.35:506:08
1712.25:516:06
1812.25:536:04
1912.15:546:02
2012.15:556:00
2112.05:565:58
2212.05:575:56
2311.95:585:54
2411.95:595:53
2511.86:015:51
2611.86:025:49
2711.76:035:47
2811.76:045:45
2911.66:055:43
3011.66:065:41

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.99 kWh/m².

For context, solar energy here swings from a low near 1.24 kWh/m² to a high of 6 kWh/m² in June across the year — September's 3.99 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.6Bright
24.5Bright
34.5Bright
44.5Bright
54.4Bright
64.4Bright
74.3Bright
84.3Bright
94.2Bright
104.2Bright
114.2Bright
124.1Bright
134.1Bright
144.0Bright
154.0Bright
164.0Moderate
173.9Moderate
183.9Moderate
193.9Moderate
203.8Moderate
213.8Moderate
223.7Moderate
233.7Moderate
243.6Moderate
253.6Moderate
263.5Moderate
273.5Moderate
283.4Moderate
293.4Moderate
303.3Moderate
Planning a trip in September

Is September a good time to visit Syracuse?

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

6.4
Sightseeing
2nd-best month of the year
4.2
Beach & pool
4th-best month of the year

September is a reasonable time to visit Syracuse for sightseeing.

What to pack for Syracuse in September

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

In September, Syracuse sees daytime highs around 71°F and nights near 54°F. Worth packing: rain gear. About 11 days see rain.

rain gear

Sea temperature near Syracuse in September

The nearest coast averages about 68°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 25 mi away) is warmest in August at about 73°F and coldest in March near 37°F.

It's comfortable for a long swim from Jul 14 to Sep 13 — about 2 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan40Bracing
Feb37Bracing
Mar37Bracing
Apr38Bracing
May44Bracing
Jun57Bracing
Jul69Refreshing
Aug73Refreshing
Sep68Cool
Oct59Bracing
Nov50Bracing
Dec44Bracing

UV index in Syracuse 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 Syracuse peaks around July 12 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 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 8Jan 1UV 1
UV index (midday)Level
Jan1Low
Feb2Moderate
Mar4Moderate
Apr5High
May8Very high
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov2Low
Dec1Low
Location & terrain

Where is Syracuse?

Syracuse sits at 43.0°N, 76.1°W, 397 ft above sea level, in United States. The nearest listed city is Cicero, 8.7 mi away.

Topography around Syracuse

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

Within 2 miles, the terrain around Syracuse has only modest variations in elevation — a maximum elevation change of 348 ft around an average of 466 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,283 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,909 ft.

The land around Syracuse is covered by artificial surfaces (53%) and trees (37%) within 2 miles, trees (61%) within 10 miles, and trees (60%) within 50 miles.

2 miles
348 ft
10 miles
1,283 ft
50 miles
1,909 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Cicero 8.7 mi · Clay 9.3 mi · Auburn 22 mi · Cortland 31 mi · Oswego 34 mi · Rome 37 mi · Ithaca 45 mi · Utica 47 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 Syracuse (43.0481°, -76.1474°, elevation 397 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).