Phoenixville weather in December

In December, Phoenixville sees average daytime highs of 43°F and overnight lows near 30°F, with 3.9 in of precipitation across 9.3 wet days and about 9.2 hours of daylight. It is the 10th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 47°F in the first days to 41°F by the end. The sky is clear or mostly clear about 29% 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 12 min by month's end. Set against the rest of the year, December is Phoenixville's 7th-clearest and 5th-windiest month. For the whole year in context, see Phoenixville's year-round climate.

Daytime high
43°
10th warmest
Overnight low
30°
3rd coldest
Precipitation
3.9 in
9.3 wet days
Daylight
9 h 12 min
7:23 AM – 4:33 PM
Cloud cover
62%
7th clearest
Wind
7 mph
5th windiest
Solar energy
1.78 kWh/m²
Travel score
0.6
out of 10

Temperature in December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 47°F in the first days to 41°F by the end.

A typical December day in Phoenixville reaches about 43°F in the afternoon and slips back to 30°F overnight — a 13°F spread between the day's warmth and the night's chill. On most days the high lands between 31°F and 56°F. Set against its neighbours, December runs about 10°F cooler than November and about 5°F warmer than January.

20°40°60°151015202531
Avg high (°F)Avg low (°F)
14834
24734
34733
44633
54633
64632
74532
84532
94432
104431
114431
124431
134331
144331
154330
164330
174330
184230
194230
204229
214229
224229
234229
244229
254229
264129
274128
284128
294128
304128
314028

How December really feels in Phoenixville

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.

Phoenixville weather by month

How December compares with the rest of the year at a glance. December is the 10th-warmest and 6th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan39° / 25°3.39.54.29.50.0
Feb42° / 26°3.093.810.40.3
Mar50° / 33°4.0113.311.72.3
Apr62° / 44°3.8110.4135.1
May71° / 53°3.911.7014.26.3
Jun81° / 63°4.311.7014.86.0
Jul85° / 68°4.411.7014.65.0
Aug83° / 66°4.010.3013.65.8
Sep76° / 59°4.69.4012.36.9
Oct64° / 47°3.88.80.110.95.9
Nov53° / 38°3.07.90.59.83.2
Dec43° / 30°3.99.32.49.20.6

Cloud cover in December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 29% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 15% of December, with mostly cloudy or overcast conditions the remaining 56%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14258
24258
34258
44159
54159
64159
74159
84159
94159
104060
114060
124159
134159
144159
154258
164456
174456
184456
194555
204654
214654
224654
234753
244852
254852
264852
274852
284852
294753
304753
314654

Chance of precipitation in December

Any precipitationSnow

Phoenixville gets around 3.9 in of rain and snow over 9.3 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 30% and peaks near 32% on the wettest days, and about 2 days bring snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1305
2305
3315
4316
5316
6326
7327
8327
9328
10328
11328
12329
13329
14329
15329
16319
17319
18319
19308
20308
21298
22298
23288
24288
25288
26288
27288
28288
29298
30299
313010

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 (%)
1982
2982
3982
4982
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
30991
31991

Wind in December

Winds average 7 mph in December.

Across December, 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.

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227light breeze
237light breeze
247light breeze
257light breeze
267light breeze
277light 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 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over December. Sunrise moves from 7:11 AM to 7:30 AM, and sunset from 4:32 PM to 4:41 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
19.47:114:32
29.37:124:32
39.37:134:32
49.37:144:32
59.37:154:32
69.37:164:32
79.37:174:32
89.27:174:32
99.27:184:32
109.27:194:32
119.27:204:32
129.27:214:32
139.27:214:32
149.27:224:33
159.27:234:33
169.27:234:33
179.27:244:33
189.17:254:34
199.17:254:34
209.17:264:34
219.17:264:35
229.17:274:35
239.17:274:36
249.17:284:36
259.17:284:37
269.17:284:37
279.27:294:38
289.27:294:39
299.27:294:39
309.27:304:40
319.27:304:41

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 1.78 kWh/m² — the year's lowest.

For context, solar energy here swings from a low near 1.78 kWh/m² to a high of 6.04 kWh/m² in June across the year — December's 1.78 kWh/m² sits near the bottom.

00.511.522.5151015202531
Solar energy (kWh/m²)Level
11.9Dim
21.9Dim
31.9Dim
41.9Dim
51.8Dim
61.8Dim
71.8Dim
81.8Dim
91.8Dim
101.8Dim
111.8Dim
121.8Dim
131.8Dim
141.7Dim
151.7Dim
161.7Dim
171.7Dim
181.8Dim
191.8Dim
201.8Dim
211.8Dim
221.8Dim
231.8Dim
241.8Dim
251.8Dim
261.8Dim
271.8Dim
281.8Dim
291.8Dim
301.8Dim
311.8Dim
Planning a trip in December

Is December a good time to visit Phoenixville?

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

0.6
Sightseeing
10th-best month of the year
0.0
Beach & pool
10th-best month of the year

December is a weaker month for outdoor sightseeing in Phoenixville.

What to pack for Phoenixville in December

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

In December, Phoenixville sees daytime highs around 43°F and nights near 30°F. Pack a warm layer. Worth having: a heavy coat and rain gear. About 9 days see rain.

a warm layera heavy coatrain gear

UV index in Phoenixville 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 Phoenixville peaks around June 23 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 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 highHighModerateLowJun 23UV 8Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun8Very high
Jul8Very high
Aug6High
Sep6High
Oct3Moderate
Nov3Moderate
Dec2Low

Air quality in Phoenixville 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 Phoenixville is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (November, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1417 µg/m³Nov 148 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Good
Mar13Moderate
Apr13Moderate
May16Moderate
Jun16Moderate
Jul17Moderate
Aug15Moderate
Sep12Good
Oct9Good
Nov8Good
Dec9Good
Location & terrain

Where is Phoenixville?

Phoenixville sits at 40.1°N, 75.5°W, 138 ft above sea level, in United States. The nearest listed city is King of Prussia, 6.8 mi away.

Topography around Phoenixville

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

Within 2 miles, the terrain around Phoenixville has only modest variations in elevation — a maximum elevation change of 341 ft around an average of 177 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,145 ft; within 50 miles, large variations in elevation — a maximum elevation change of 1,969 ft.

The land around Phoenixville is covered by trees (59%) and grassland (21%) within 2 miles, trees (63%) and grassland (23%) within 10 miles, and trees (57%) within 50 miles.

2 miles
341 ft
10 miles
1,145 ft
50 miles
1,969 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
December weather nearby: King of Prussia 6.8 mi · Limerick 6.8 mi · Wayne 8.7 mi · Norristown 9.3 mi · Radnor 9.9 mi · Pottstown 11 mi · West Chester 12 mi · Lansdale 14 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 Phoenixville (40.1304°, -75.5149°, elevation 138 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).