Hamilton weather in December

In December, Hamilton sees average daytime highs of 42°F and overnight lows near 29°F, with 3.6 in of precipitation across 10.1 wet days and about 9.3 hours of daylight. It is the 10th-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 45°F in the first days to 39°F by the end. The sky is clear or mostly clear about 19% of the time in December, and the air most often feels dry.

Daylight stretches from about 9 h 24 min at the start of December to 9 h 18 min by month's end. Set against the rest of the year, December is Hamilton's 11th-clearest and 5th-windiest month. For the whole year in context, see Hamilton's year-round climate.

Daytime high
42°
10th warmest
Overnight low
29°
3rd coldest
Precipitation
3.6 in
10.1 wet days
Daylight
9 h 12 min
7:57 AM – 5:11 PM
Cloud cover
72%
11th clearest
Wind
8 mph
5th windiest
Solar energy
1.67 kWh/m²
Travel score
0.2
out of 10

Hamilton is city in Butler County, Ohio, United States.

Density
1,092/km²
people per km²
Founded
1794

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 45°F in the first days to 39°F by the end.

A typical December day in Hamilton reaches about 42°F in the afternoon and slips back to 29°F overnight — a 13°F spread between the day's warmth and the night's chill. On most days the high lands between 28°F and 56°F. Set against its neighbours, December runs about 10°F cooler than November and about 4°F warmer than January.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
14632
24532
34532
44431
54431
64431
74330
84330
94330
104229
114229
124229
134229
144129
154128
164128
174128
184128
194028
204028
214027
224027
234027
244027
254027
264027
274027
283926
293926
303926
313926

How December really feels in Hamilton

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.

Hamilton weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan38° / 24°3.310.34.39.50.0
Feb41° / 26°2.99.23.710.50.3
Mar51° / 34°4.111.3211.72.5
Apr64° / 45°4.712.50.5135.2
May73° / 55°4.612.8014.16.2
Jun81° / 64°4.212.3014.75.9
Jul84° / 67°3.611.2014.55.4
Aug83° / 66°3.29.9013.56.0
Sep77° / 58°2.78012.37.2
Oct65° / 46°3.08.40.1116.0
Nov52° / 37°3.39.10.89.82.8
Dec42° / 29°3.610.139.30.2

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% 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 71%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
13169
23169
33169
43070
53070
62971
72971
82971
92872
102872
112872
122872
132773
142674
152773
162773
172872
182872
192872
202872
212971
222971
232971
242971
252971
262971
272971
282971
292971
302971
312971

Chance of precipitation in December

Any precipitationSnow

Hamilton gets around 3.6 in of rain and snow over 10.1 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 33% and peaks near 34% on the wettest days, and about 3 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1336
2336
3337
4337
5337
6348
7348
8349
9349
103410
113410
123410
133311
143411
153411
163411
173311
183311
193311
203311
213211
223211
233211
243211
253211
263211
273211
283211
293311
303311
313312

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 99% 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
8991
9991
10991
11991
12991
13991
14991
15991
16991
17991
18991
19991
20991
21991
22991
23991
24991
25991
26991
27991
28991
29991
30982
31982

Wind in December

Winds average 8 mph in December.

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

051015151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light 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
318light breeze

Sunrise & sunset in December

DaylightNight

Daylight runs from about 9 h 24 min at the start of December to 9 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 6 minutes over December. Sunrise moves from 7:45 AM to 8:04 AM, and sunset from 5:11 PM to 5:19 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.47:455:11
29.47:465:11
39.47:475:10
49.47:485:10
59.47:495:10
69.37:505:10
79.37:515:10
89.37:515:10
99.37:525:10
109.37:535:10
119.37:545:10
129.37:555:11
139.37:555:11
149.27:565:11
159.27:575:11
169.27:575:11
179.27:585:12
189.27:595:12
199.27:595:12
209.28:005:13
219.28:005:13
229.28:015:14
239.28:015:14
249.28:025:15
259.28:025:15
269.28:025:16
279.28:035:16
289.28:035:17
299.28:035:18
309.28:035:18
319.38:045:19

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.67 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.67 kWh/m² to a high of 6.21 kWh/m² in June across the year — December's 1.67 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.8Dim
21.8Dim
31.8Dim
41.7Dim
51.7Dim
61.7Dim
71.7Dim
81.7Dim
91.7Dim
101.7Dim
111.7Dim
121.7Dim
131.6Dim
141.6Dim
151.6Dim
161.6Dim
171.6Dim
181.6Dim
191.6Dim
201.6Dim
211.7Dim
221.7Dim
231.7Dim
241.7Dim
251.7Dim
261.7Dim
271.7Dim
281.7Dim
291.7Dim
301.7Dim
311.7Dim
Planning a trip in December

Is December a good time to visit Hamilton?

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

0.2
Sightseeing
11th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Hamilton.

What to pack for Hamilton in December

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

In December, Hamilton sees daytime highs around 42°F and nights near 29°F. Pack a warm layer and a heavy coat. Worth having: rain gear. About 10 days see rain.

a warm layera heavy coatrain gear

UV index in Hamilton 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 Hamilton peaks around June 21 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 21UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov3Moderate
Dec2Low

Air quality in Hamilton 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 Hamilton is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1217 µg/m³Oct 228 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar12Good
Apr12Good
May14Moderate
Jun16Moderate
Jul17Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Hamilton?

Hamilton sits at 39.4°N, 84.6°W, 594 ft above sea level, in United States. The nearest listed city is Fairfield, 3.7 mi away.

Topography around Hamilton

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

Within 2 miles, the terrain around Hamilton has only modest variations in elevation — a maximum elevation change of 308 ft around an average of 643 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 558 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 876 ft.

The land around Hamilton is covered by trees (34%), artificial surfaces (34%) and grassland (22%) within 2 miles, trees (39%) and grassland (31%) within 10 miles, and trees (41%) and cropland (39%) within 50 miles.

2 miles
308 ft
10 miles
558 ft
50 miles
876 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
December weather nearby: Fairfield 3.7 mi · Forest Park 8.1 mi · Middletown 12 mi · Oxford 12 mi · White Oak 13 mi · Mason 14 mi · Norwood 17 mi · Cincinnati 19 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 Hamilton (39.3995°, -84.5613°, elevation 594 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. 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).