Sylvania weather in September

In September, Sylvania sees average daytime highs of 74°F and overnight lows near 56°F, with 2.4 in of rain across 8.2 wet days and about 12.3 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 78°F in the first days to 70°F by the end. The sky is clear or mostly clear about 38% 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 Sylvania's 1st-clearest and 10th-windiest month. For the whole year in context, see Sylvania's year-round climate.

Daytime high
74°
4th warmest
Overnight low
56°
9th coldest
Rainfall
2.4 in
8.2 wet days
Daylight
12 h 18 min
6:21 AM – 6:37 PM
Cloud cover
53%
1st clearest
Wind
8 mph
10th windiest
Solar energy
4.36 kWh/m²
Travel score
7.1
out of 10

Sylvania is city in Lucas County, Ohio, United States.

Density
1,123/km²
people per km²
Founded
1833

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 78°F in the first days to 70°F by the end.

A typical September day in Sylvania reaches about 74°F in the afternoon and slips back to 56°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 64°F and 85°F. Set against its neighbours, September runs about 6°F cooler than August and about 12°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
17961
27961
37860
47860
57860
67859
77759
87759
97758
107658
117657
127657
137557
147556
157556
167455
177455
187455
197354
207354
217353
227253
237253
247152
257152
267151
277051
287051
296950
306950

How September really feels in Sylvania

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.

Sylvania weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan33° / 20°2.59.85.79.30.0
Feb35° / 21°2.18.65.410.30.0
Mar46° / 29°2.89.93.711.71.2
Apr58° / 40°3.611.90.913.14.1
May69° / 51°3.812.7014.36.0
Jun79° / 61°3.511.40156.4
Jul83° / 65°3.311014.75.9
Aug81° / 63°3.29.9013.76.6
Sep74° / 56°2.48.2012.37.1
Oct62° / 44°2.69.10.110.95.3
Nov49° / 34°2.78.61.59.61.9
Dec37° / 26°2.48.84.290.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 38% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 46%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15644
25743
35743
45743
55743
65743
75743
85743
95743
105644
115644
125644
135545
145545
155446
165446
175446
185347
195347
205347
215347
225248
235248
245248
255149
265149
275149
285050
295050
305050

Chance of precipitation in September

Any precipitation

Sylvania gets around 2.4 in of rain over 8.2 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 28% and peaks near 30% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
128
228
328
428
527
627
727
826
926
1026
1126
1225
1326
1426
1526
1626
1726
1826
1927
2027
2128
2228
2329
2429
2530
2630
2730
2830
2930
3030

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 49% of days. Sticky, muggy-or-worse air turns up on roughly 12% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1232525234
2242525224
3262624214
4282624193
5302623183
6322623173
7332622162
8352622152
9372521142
10392521131
11412520131
12432420121
13452319111
14472319111
15492218101
16512217100
1753211790
1854211690
1956211580
2058201480
2160201370
2261201270
2364191160
2465191060
2566191050
266818950
276818950
287018840
297117840
307217740

Wind in September

Winds average 8 mph in September.

Across September, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127light breeze
137light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light 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 6:05 AM to 6:36 AM, and sunset from 7:04 PM to 6:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
113.06:057:04
212.96:067:02
312.96:077:01
412.86:086:59
512.86:096:57
612.86:106:55
712.76:116:54
812.76:126:52
912.66:136:50
1012.66:156:48
1112.56:166:46
1212.56:176:45
1312.46:186:43
1412.46:196:41
1512.36:206:39
1612.36:216:37
1712.26:226:36
1812.26:236:34
1912.16:246:32
2012.16:256:30
2112.06:266:28
2212.06:276:27
2311.96:286:25
2411.96:296:23
2511.86:316:21
2611.86:326:19
2711.76:336:18
2811.76:346:16
2911.76:356:14
3011.66:366:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.36 kWh/m².

For context, solar energy here swings from a low near 1.53 kWh/m² to a high of 6.32 kWh/m² in June across the year — September's 4.36 kWh/m² falls in the middle.

024151015202530
Solar energy (kWh/m²)Level
14.9Bright
24.8Bright
34.8Bright
44.8Bright
54.7Bright
64.7Bright
74.7Bright
84.6Bright
94.6Bright
104.5Bright
114.5Bright
124.5Bright
134.4Bright
144.4Bright
154.4Bright
164.3Bright
174.3Bright
184.3Bright
194.2Bright
204.2Bright
214.1Bright
224.1Bright
234.0Bright
244.0Bright
254.0Moderate
263.9Moderate
273.9Moderate
283.8Moderate
293.8Moderate
303.8Moderate
Planning a trip in September

Is September a good time to visit Sylvania?

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

7.1
Sightseeing
1st-best month of the year
5.6
Beach & pool
4th-best month of the year

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

What to pack for Sylvania in September

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

In September, Sylvania sees daytime highs around 74°F and nights near 56°F. Worth packing: light clothes and rain gear. About 8 days see rain.

light clothesrain gear

Sea temperature near Sylvania 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 at the nearest coast (about 21 mi away) is warmest in August at about 75°F and coldest in February near 33°F.

It's comfortable for a long swim from Jun 20 to Sep 20 — about 3.1 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan34Bracing
Feb33Bracing
Mar36Bracing
Apr44Bracing
May56Bracing
Jun67Cool
Jul75Refreshing
Aug75Warm
Sep70Refreshing
Oct58Bracing
Nov46Bracing
Dec38Bracing

UV index in Sylvania 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 Sylvania peaks around June 18 at about 9 (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 highHighModerateLowJun 18UV 9Dec 21UV 1
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr6High
May7Very high
Jun9Very high
Jul8Very high
Aug7Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec1Low

Air quality in Sylvania 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 Sylvania is worst in July — around 16 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1116 µg/m³Oct 238 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar14Moderate
Apr13Moderate
May15Moderate
Jun16Moderate
Jul16Moderate
Aug15Moderate
Sep12Good
Oct8Good
Nov9Good
Dec9Good
Location & terrain

Where is Sylvania?

Sylvania sits at 41.7°N, 83.7°W, 663 ft above sea level, in United States. The nearest listed city is Toledo, 8.7 mi away.

Topography around Sylvania

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

Within 2 miles, the terrain around Sylvania has only modest variations in elevation — a maximum elevation change of 135 ft around an average of 673 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 256 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 945 ft.

The land around Sylvania is covered by trees (43%) and grassland (23%) within 2 miles, cropland (39%) and trees (34%) within 10 miles, and cropland (51%) and trees (22%) within 50 miles.

2 miles
135 ft
10 miles
256 ft
50 miles
945 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Toledo 8.7 mi · Perrysburg 12 mi · Oregon 13 mi · Adrian 21 mi · Monroe 21 mi · Bowling Green 24 mi · Ypsilanti 37 mi · Romulus 39 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 Sylvania (41.7189°, -83.713°, elevation 663 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. 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).