Pottstown weather in December: Pottstown, Pennsylvania: normal highs, lows, rain and records for December
Pottstown in December has a normal high of 42°F and a normal low of 27°F, a daily mean of 34°F, falling from 47°F on the 1st to 39°F by the 31st. Measurable precipitation falls on 11 days in a normal December, 3.76 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 6°C and low of −3°C, 96 mm of precipitation in December.
- NOAA stationPottstown Limerick Airport
- Station IDUSW00054782
- Location40.24°N 75.56°W
- Elevation291 ft (89 m)
- From the center5 miles
- Population23,553
- Jan 37° 22°
- Feb 40° 23°
- Mar 49° 30°
- Apr 61° 40°
- May 71° 50°
- Jun 79° 59°
- Jul 84° 64°
- Aug 82° 62°
- Sep 75° 55°
- Oct 63° 43°
- Nov 52° 34°
- Dec 42° 27°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Pottstown in December?
The normal high is 42°F and the normal low 27°F, for a daily mean of 34.4°F. December is 8.6°F cooler than November and 4.7°F warmer than January. December is the 10th warmest month of the year in Pottstown and the 7th wettest. Across the month the normal high falls 8°F, from 47°F on December 1 to 39°F on December 31. From one year to the next December's mean temperature typically moves about 4.0°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 30°F and 38°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 36%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 47°F | 30°F | 35% | 21% |
| December 8 | 44°F | 28°F | 36% | 22% |
| December 15 | 42°F | 27°F | 36% | 22% |
| December 22 | 40°F | 25°F | 36% | 22% |
| December 31 | 39°F | 24°F | 35% | 21% |
Every day of December: normal high, low and chance of precipitation (warmest afternoon December 1, coldest night December 31)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| December 1 | 47°F | 30°F | 35% | 21% | 9 h 30 min |
| December 2 | 46°F | 30°F | 35% | 21% | 9 h 30 min |
| December 3 | 46°F | 29°F | 35% | 21% | 9 h 30 min |
| December 4 | 46°F | 29°F | 35% | 22% | 9 h 30 min |
| December 5 | 45°F | 29°F | 35% | 22% | 9 h 30 min |
| December 6 | 45°F | 29°F | 36% | 22% | 9 h 30 min |
| December 7 | 45°F | 29°F | 36% | 22% | 9 h 30 min |
| December 8 | 44°F | 28°F | 36% | 22% | 9 h 20 min |
| December 9 | 44°F | 28°F | 36% | 22% | 9 h 20 min |
| December 10 | 44°F | 28°F | 36% | 22% | 9 h 20 min |
| December 11 | 43°F | 28°F | 36% | 22% | 9 h 20 min |
| December 12 | 43°F | 28°F | 36% | 22% | 9 h 20 min |
| December 13 | 43°F | 27°F | 36% | 22% | 9 h 20 min |
| December 14 | 42°F | 27°F | 36% | 22% | 9 h 20 min |
| December 15 | 42°F | 27°F | 36% | 22% | 9 h 20 min |
| December 16 | 42°F | 27°F | 36% | 22% | 9 h 20 min |
| December 17 | 42°F | 26°F | 36% | 22% | 9 h 20 min |
| December 18 | 41°F | 26°F | 36% | 22% | 9 h 20 min |
| December 19 | 41°F | 26°F | 36% | 22% | 9 h 20 min |
| December 20 | 41°F | 26°F | 36% | 22% | 9 h 20 min |
| December 21 | 41°F | 26°F | 36% | 22% | 9 h 20 min |
| December 22 | 40°F | 25°F | 36% | 22% | 9 h 20 min |
| December 23 | 40°F | 25°F | 36% | 22% | 9 h 20 min |
| December 24 | 40°F | 25°F | 36% | 22% | 9 h 20 min |
| December 25 | 40°F | 25°F | 36% | 22% | 9 h 20 min |
| December 26 | 40°F | 25°F | 36% | 21% | 9 h 20 min |
| December 27 | 39°F | 25°F | 36% | 21% | 9 h 20 min |
| December 28 | 39°F | 24°F | 36% | 21% | 9 h 20 min |
| December 29 | 39°F | 24°F | 36% | 21% | 9 h 20 min |
| December 30 | 39°F | 24°F | 36% | 21% | 9 h 20 min |
| December 31 | 39°F | 24°F | 35% | 21% | 9 h 20 min |
- Normal high
- 42°FDecember average
- Normal low
- 27°FDecember average
- Precipitation
- 3.76 inmonth total
- Days with precipitation
- 110.01 inch or more
- Nights at 32°F or colder
- 23
- Daylight
- 9 h 30 min to 9 h 20 minDecember 1 to December 31
- Sunshine
- 63%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00054782; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Pottstown in December?
On a given December day the chance of 0.01 inch or more is 36% on average, highest around December 12 (36%). In all, 3.76 in falls on 11 days of a normal December, 1 of them with an inch or more.
In a normal December in Pottstown, 23 nights fall to freezing and 4 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00054782.
What are the records for December in Pottstown?
The warmest December temperature on this station's record (since 1999) is 73°F, on December 5, 2001; the coldest is 0°F, on December 14, 2005. The wettest December brought 7.92 in (2023).
The December mean against the 1991-2020 normal of 34.4°F: 2021 38.6°F (+4.2), 2022 32.7°F (−1.7), 2023 39.2°F (+4.8), 2024 35.2°F (+0.8). 3 of 4 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 38.6°F | +4.2°F | 1.35 in |
| 2022 | 32.7°F | −1.7°F | 4.20 in |
| 2023 | 39.2°F | +4.8°F | 7.92 in |
| 2024 | 35.2°F | +0.8°F | – |
Source: records: ACIS, station USW00054782; recent months: ACIS, station USW00054782. Records and recent months use complete months only.
How does December in Pottstown compare across Pennsylvania?
Across the 108 places PlainClimate covers in Pennsylvania, December normal highs run from 34°F in Laporte to 48°F in Marcus Hook; Pottstown's is 42°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Pottstown in November52°F by day, 34°F at night
- Pottstown in January37°F by day, 22°F at night
- Pottstown through the yearEvery month, frost dates, records and recent years
- Pennsylvania in DecemberThe statewide normal and the warmest and coolest places
- Marcus Hook: Pennsylvania's warmest Decembernormal high 48°F