Sylvania weather in December

In December, Sylvania sees average daytime highs of 37°F and overnight lows near 26°F, with 2.4 in of precipitation across 8.8 wet days and about 9 hours of daylight. It is the 10th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 41°F in the first days to 35°F by the end. The sky is clear or mostly clear about 14% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 12 min at the start of December to 9 hours by month's end. Set against the rest of the year, December is Sylvania's 11th-clearest and 5th-windiest month. For the whole year in context, see Sylvania's year-round climate.

Daytime high
37°
10th warmest
Overnight low
26°
3rd coldest
Precipitation
2.4 in
8.8 wet days
Daylight
9 hours
8:01 AM – 5:01 PM
Cloud cover
76%
11th clearest
Wind
9 mph
5th windiest
Solar energy
1.53 kWh/m²
Travel score
0.0
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 December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 41°F in the first days to 35°F by the end.

A typical December day in Sylvania reaches about 37°F in the afternoon and slips back to 26°F overnight — a 12°F spread between the day's warmth and the night's chill. On most days the high lands between 24°F and 52°F. Set against its neighbours, December runs about 11°F cooler than November and about 5°F warmer than January.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
14230
24229
34129
44129
54028
64028
74028
83927
93927
103827
113826
123826
133726
143726
153725
163725
173725
183625
193624
203624
213624
223624
233624
243524
253524
263523
273523
283523
293523
303523
313523

How December really feels in Sylvania

Once humidity and wind are folded in, December averages 0 days that feel above 90°F and 31 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
31
10 feel bitter (≤ 14°F)

The story in December is cold — wind chill drags the overnight "feels like" below the raw low.

Sylvania weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 11th-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 14% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 9% of December, with mostly cloudy or overcast conditions the remaining 77%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
12575
22575
32476
42476
52377
62377
72377
82377
92377
102377
112278
122278
132278
142278
152377
162377
172377
182377
192476
202476
212476
222377
232476
242476
252476
262476
272377
282377
292476
302476
312476

Chance of precipitation in December

Any precipitationSnow

Sylvania gets around 2.4 in of rain and snow over 8.8 wet days in December. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 29% and peaks near 31% on the wettest days, and about 4 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
13110
23111
33111
43011
53011
63012
72912
82913
92913
102914
112914
122914
132914
142915
152915
162915
172915
182915
192915
202915
212915
222915
232814
242814
252814
262814
272914
282914
292914
302914
313014

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

Most of December feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, December lands in the dry band about 100% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)
1991
2991
3991
4991
5991
6991
7991
81000
91000
101000
111000
121000
131000
141000
151000
161000
171000
181000
191000
201000
211000
221000
231000
241000
251000
261000
271000
281000
291000
301000
311000

Wind in December

Winds average 9 mph in December.

Across December, daily wind ranges from about 9 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
110light breeze
210light breeze
310light breeze
410light breeze
510light breeze
610light breeze
710light 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
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light breeze
3110light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 12 min at the start of December to 9 hours by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 7:49 AM to 8:08 AM, and sunset from 5:00 PM to 5:08 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.27:495:00
29.27:505:00
39.27:515:00
49.17:525:00
59.17:535:00
69.17:545:00
79.17:545:00
89.17:555:00
99.17:565:00
109.07:575:00
119.07:585:00
129.07:595:00
139.07:595:00
149.08:005:00
159.08:015:00
169.08:015:01
179.08:025:01
189.08:035:01
199.08:035:02
209.08:045:02
219.08:045:02
229.08:055:03
239.08:055:03
249.08:065:04
259.08:065:04
269.08:065:05
279.08:075:06
289.08:075:06
299.08:075:07
309.08:075:08
319.08:085:08

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.53 kWh/m² — the year's lowest.

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 — December's 1.53 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.6Dim
21.6Dim
31.6Dim
41.6Dim
51.6Dim
61.6Dim
71.6Dim
81.5Dim
91.5Dim
101.5Dim
111.5Dim
121.5Dim
131.5Dim
141.5Dim
151.5Dim
161.5Dim
171.5Dim
181.5Dim
191.5Dim
201.5Dim
211.5Dim
221.5Dim
231.5Dim
241.5Dim
251.6Dim
261.6Dim
271.6Dim
281.6Dim
291.6Dim
301.6Dim
311.6Dim
Planning a trip in December

Is December a good time to visit Sylvania?

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

0.0
Sightseeing
10th-best month of the year
0.0
Beach & pool
9th-best month of the year

December is a weaker month for outdoor sightseeing in Sylvania.

What to pack for Sylvania in December

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

In December, Sylvania sees daytime highs around 37°F and nights near 26°F. Pack a warm layer and a heavy coat. Worth having: rain gear. About 9 days see rain.

a warm layera heavy coatrain gear

Sea temperature near Sylvania in December

The nearest coast averages about 38°F in December — 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 December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 1. 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 December

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where December 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
December 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).