Mentor weather in December

In December, Mentor sees average daytime highs of 38°F and overnight lows near 31°F, with 4.3 in of precipitation across 16.1 wet days and about 9 hours of daylight. It is the 10th-warmest and 4th-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 8% 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 Mentor's 11th-clearest and 1st-windiest month. For the whole year in context, see Mentor's year-round climate.

Daytime high
38°
10th warmest
Overnight low
31°
4th coldest
Precipitation
4.3 in
16.1 wet days
Daylight
9 hours
7:52 AM – 4:51 PM
Cloud cover
83%
11th clearest
Wind
14 mph
1st windiest
Solar energy
1.29 kWh/m²
Travel score
0.0
out of 10

Mentor is city in Lake County, Ohio, United States.

Density
647/km²
people per km²
Founded
1797

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 Mentor reaches about 38°F in the afternoon and slips back to 31°F overnight — a 7°F spread between the day's warmth and the night's chill. On most days the high lands between 28°F and 49°F. Set against its neighbours, December runs about 9°F cooler than November and about 5°F warmer than January.

20°30°40°50°60°151015202531
Avg high (°F)Avg low (°F)
14235
24235
34135
44134
54134
64034
74033
84033
93933
103932
113932
123832
133831
143831
153831
163831
173731
183730
193730
203730
213730
223729
233629
243629
253629
263629
273628
283528
293528
303528
313528

How December really feels in Mentor

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
wind chill below the day's low

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

Mentor weather by month

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

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan33° / 24°3.915.412.19.30.0
Feb33° / 23°2.911.47.910.30.0
Mar39° / 29°3.612.35.611.70.1
Apr50° / 40°4.313.51.613.12.0
May63° / 54°4.013.1014.35.0
Jun73° / 65°4.913.20156.4
Jul78° / 69°4.412.8014.76.6
Aug76° / 68°4.112.6013.76.8
Sep70° / 61°4.010.4012.36.6
Oct59° / 50°4.313.2010.94.2
Nov47° / 40°4.514.43.69.71.4
Dec38° / 31°4.316.19.990.0

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 8% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 6% of December, with mostly cloudy or overcast conditions the remaining 85%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
11981
21882
31783
41783
51783
61783
71684
81684
91684
101486
111486
121486
131486
141486
151486
161486
171486
181486
191387
201387
211387
221387
231387
241387
251387
261387
271387
281387
291387
301387
311387

Chance of precipitation in December

Any precipitationSnow

Mentor gets around 4.3 in of rain and snow over 16.1 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 52% and peaks near 53% on the wettest days, and about 10 days bring snow.

0%20%40%60%151015202531
Rain chance (%)Snow chance (%)
15322
25323
35324
45325
55326
65227
75228
85229
95230
105231
115232
125232
135232
145233
155233
165233
175233
185233
195233
205233
215234
225234
235234
245234
255234
265234
275235
285235
295235
305336
315336

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 (%)
1100
2100
3100
4100
5100
6100
7100
8100
9100
10100
11100
12100
13100
14100
15100
16100
17100
18100
19100
20100
21100
22100
23100
24100
25100
26100
27100
28100
29100
30100
31100

Wind in December

Winds average 14 mph in December, the windiest month of the year.

Across December, daily wind ranges from about 14 mph on the calmest days to 14 mph at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (mph)Feels
114breezy
214breezy
314breezy
414breezy
514breezy
614breezy
714breezy
814breezy
914breezy
1014breezy
1114breezy
1214breezy
1314breezy
1414breezy
1514breezy
1614breezy
1714breezy
1814breezy
1914breezy
2014breezy
2114breezy
2214breezy
2314breezy
2414breezy
2514breezy
2614breezy
2714breezy
2814breezy
2914breezy
3014breezy
3114breezy

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 7:39 AM to 7:58 AM, and sunset from 4:51 PM to 4:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.27:394:51
29.27:404:51
39.27:414:51
49.17:424:51
59.17:434:50
69.17:444:50
79.17:454:50
89.17:464:50
99.17:464:50
109.07:474:50
119.07:484:50
129.07:494:50
139.07:504:51
149.07:504:51
159.07:514:51
169.07:524:51
179.07:524:52
189.07:534:52
199.07:544:52
209.07:544:53
219.07:554:53
229.07:554:54
239.07:564:54
249.07:564:55
259.07:564:55
269.07:574:56
279.07:574:56
289.07:574:57
299.07:584:58
309.07:584:58
319.07:584:59

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.29 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.29 kWh/m² to a high of 6.45 kWh/m² in June across the year — December's 1.29 kWh/m² sits near the bottom.

00.511.52151015202531
Solar energy (kWh/m²)Level
11.4Dim
21.4Dim
31.4Dim
41.4Dim
51.4Dim
61.3Dim
71.3Dim
81.3Dim
91.3Dim
101.3Dim
111.3Dim
121.3Dim
131.3Dim
141.3Dim
151.3Dim
161.3Dim
171.3Dim
181.3Dim
191.3Dim
201.3Dim
211.3Dim
221.3Dim
231.3Dim
241.3Dim
251.3Dim
261.3Dim
271.3Dim
281.3Dim
291.3Dim
301.3Dim
311.3Dim
Planning a trip in December

Is December a good time to visit Mentor?

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
8th-best month of the year

December is a weaker month for outdoor sightseeing in Mentor.

What to pack for Mentor in December

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

In December, Mentor sees daytime highs around 38°F and nights near 31°F. Pack a warm layer and rain gear. Worth having: a heavy coat and a windbreaker. About 16 days see rain.

a warm layerrain geara heavy coata windbreaker

Sea temperature near Mentor in December

The nearest coast averages about 42°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 14 mi away) is warmest in August at about 74°F and coldest in February near 33°F.

It's comfortable for a long swim from Jul 2 to Sep 23 — about 2.8 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan36Bracing
Feb33Bracing
Mar34Bracing
Apr40Bracing
May50Bracing
Jun63Cool
Jul73Refreshing
Aug74Refreshing
Sep70Refreshing
Oct61Cool
Nov51Bracing
Dec42Bracing

UV index in Mentor in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 2. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Mentor peaks around June 19 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 19UV 9Jan 1UV 2
UV index (midday)Level
Jan2Low
Feb2Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug7High
Sep6High
Oct3Moderate
Nov2Moderate
Dec2Low
Location & terrain

Where is Mentor?

Mentor sits at 41.7°N, 81.3°W, 692 ft above sea level, in United States. The nearest listed city is Willoughby, 3.7 mi away.

Topography around Mentor

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

Within 2 miles, the terrain around Mentor has only modest variations in elevation — a maximum elevation change of 253 ft around an average of 705 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 856 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 879 ft.

The land around Mentor is covered by trees (53%), artificial surfaces (24%) and grassland (22%) within 2 miles, trees (47%) and water (30%) within 10 miles, and water (47%) and trees (34%) within 50 miles.

2 miles
253 ft
10 miles
856 ft
50 miles
879 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Willoughby 3.7 mi · Eastlake 5.6 mi · Painesville 6.2 mi · Euclid 11 mi · Mayfield Heights 12 mi · South Euclid 14 mi · Collinwood 14 mi · Cleveland Heights 15 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 Mentor (41.6662°, -81.3396°, elevation 692 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).