Clay weather in September

In September, Clay sees average daytime highs of 71°F and overnight lows near 56°F, with 4.0 in of rain across 10.9 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 35% 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 Clay's 3rd-clearest and 9th-windiest month. For the whole year in context, see Clay's year-round climate.

Daytime high
71°
4th warmest
Overnight low
56°
9th coldest
Rainfall
4.0 in
10.9 wet days
Daylight
12 h 18 min
5:50 AM – 6:08 PM
Cloud cover
56%
3rd clearest
Wind
6 mph
9th windiest
Solar energy
4.04 kWh/m²
Travel score
6.4
out of 10

Clay is town in Onondaga County, New York, United States.

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 Clay reaches about 71°F in the afternoon and slips back to 56°F overnight — a 15°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)
17560
27560
37560
47460
57459
67459
77459
87358
97358
107358
117358
127257
137257
147156
157156
167156
177155
187055
197055
206954
216954
226954
236853
246853
256753
266752
276752
286652
296651
306551

How September really feels in Clay

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.

Clay 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
Jan32° / 20°3.515.814.49.20.0
Feb33° / 20°2.912.610.510.20.0
Mar41° / 27°3.613.16.811.60.3
Apr53° / 39°4.213.12.113.12.9
May64° / 49°3.812.2014.45.5
Jun73° / 58°4.512.6015.16.4
Jul78° / 64°4.312.8014.96.4
Aug77° / 63°4.012.6013.86.6
Sep71° / 56°4.010.9012.36.4
Oct59° / 46°4.7140.110.84.1
Nov47° / 35°3.915.24.29.51.3
Dec37° / 27°4.116.811.68.90.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 49%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15743
25743
35644
45743
55644
65545
75545
85446
95347
105347
115248
125248
135248
145149
155050
165050
175050
185050
195050
205050
215050
225050
235050
244852
254852
264852
274852
284753
294753
304654

Chance of precipitation in September

Any precipitation

Clay gets around 4.0 in of rain over 10.9 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 37% and peaks near 45% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
133
233
333
434
534
634
734
834
935
1035
1135
1236
1336
1436
1536
1636
1736
1837
1937
2037
2138
2238
2339
2440
2541
2642
2743
2844
2944
3045

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 43% of days. Sticky, muggy-or-worse air turns up on roughly 11% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1202830193
2212829193
3222828183
4242828173
5252827173
6272827162
7282826152
8302826142
9322825142
10332824132
11352724121
12372723121
13392722111
14402721111
15422620101
16442619101
1746261991
1847261891
1949251781
2051251680
2153241670
2256231560
2357231460
2459221450
2560221350
2662221240
2764211140
2866211030
2966211030
306820930

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
187calm
197calm
207calm
217calm
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 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.05:336:35
213.05:346:34
312.95:366:32
412.95:376:30
512.85:386:28
612.85:396:26
712.75:406:25
812.75:416:23
912.65:426:21
1012.65:446:19
1112.55:456:17
1212.55:466:15
1312.45:476:13
1412.45:486:11
1512.35:496:10
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
2311.95:585:55
2411.95:595:53
2511.86:015:51
2611.86:025:49
2711.76:035:47
2811.76:045:45
2911.66:055:43
3011.66:065:42

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.04 kWh/m².

For context, solar energy here swings from a low near 1.22 kWh/m² to a high of 6.11 kWh/m² in June across the year — September's 4.04 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.6Bright
34.6Bright
44.5Bright
54.5Bright
64.5Bright
74.4Bright
84.4Bright
94.3Bright
104.3Bright
114.2Bright
124.2Bright
134.2Bright
144.1Bright
154.1Bright
164.0Bright
174.0Moderate
184.0Moderate
193.9Moderate
203.9Moderate
213.8Moderate
223.8Moderate
233.7Moderate
243.7Moderate
253.6Moderate
263.6Moderate
273.5Moderate
283.5Moderate
293.4Moderate
303.4Moderate
Planning a trip in September

Is September a good time to visit Clay?

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 Clay for sightseeing.

What to pack for Clay in September

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

In September, Clay sees daytime highs around 71°F and nights near 56°F. Worth packing: rain gear. About 11 days see rain.

rain gear

Sea temperature near Clay 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 17 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 Clay 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 Clay 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 Clay?

Clay sits at 43.2°N, 76.2°W, 394 ft above sea level, in United States. The nearest listed city is Cicero, 2.5 mi away.

Topography around Clay

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

Within 2 miles, the terrain around Clay has only modest variations in elevation — a maximum elevation change of 105 ft around an average of 400 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 413 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,909 ft.

The land around Clay is covered by trees (59%) and grassland (27%) within 2 miles, trees (56%) within 10 miles, and trees (57%) within 50 miles.

2 miles
105 ft
10 miles
413 ft
50 miles
1,909 ft
treesgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Cicero 2.5 mi · Syracuse 9.3 mi · Oswego 25 mi · Auburn 27 mi · Rome 36 mi · Cortland 40 mi · Utica 48 mi · Ithaca 54 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 Clay (43.1859°, -76.1724°, elevation 394 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).