Reading weather in December: Reading, Pennsylvania: normal highs, lows, rain and records for December
Reading in December has a normal high of 43°F and a normal low of 28°F, a daily mean of 36°F, falling from 48°F on the 1st to 40°F by the 31st. Measurable precipitation falls on 11 days in a normal December, 3.51 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 6°C and low of −2°C, 89 mm of precipitation in December.
- NOAA stationReading Regional Airport
- Station IDUSW00014712
- Location40.37°N 75.97°W
- Elevation341 ft (104 m)
- From the center3 miles
- Population96,000
- Jan 39° 23°
- Feb 42° 24°
- Mar 51° 32°
- Apr 63° 42°
- May 74° 52°
- Jun 82° 61°
- Jul 87° 66°
- Aug 84° 64°
- Sep 77° 57°
- Oct 65° 45°
- Nov 54° 35°
- Dec 43° 28°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Reading in December?
The normal high is 43°F and the normal low 28°F, for a daily mean of 35.7°F. December is 8.9°F cooler than November and 4.9°F warmer than January. December is the 10th warmest month of the year in Reading and the 7th wettest. Across the month the normal high falls 8°F, from 48°F on December 1 to 40°F on December 31. From one year to the next December's mean temperature typically moves about 3.9°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 32°F and 40°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 35%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 48°F | 31°F | 34% | 22% |
| December 8 | 46°F | 30°F | 35% | 22% |
| December 15 | 43°F | 28°F | 35% | 23% |
| December 22 | 42°F | 27°F | 35% | 22% |
| December 31 | 40°F | 25°F | 35% | 22% |
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 | 48°F | 31°F | 34% | 22% | 9 h 30 min |
| December 2 | 48°F | 31°F | 34% | 22% | 9 h 30 min |
| December 3 | 47°F | 31°F | 34% | 22% | 9 h 30 min |
| December 4 | 47°F | 31°F | 34% | 22% | 9 h 30 min |
| December 5 | 47°F | 30°F | 34% | 22% | 9 h 30 min |
| December 6 | 46°F | 30°F | 34% | 22% | 9 h 30 min |
| December 7 | 46°F | 30°F | 35% | 22% | 9 h 20 min |
| December 8 | 46°F | 30°F | 35% | 22% | 9 h 20 min |
| December 9 | 45°F | 30°F | 35% | 23% | 9 h 20 min |
| December 10 | 45°F | 29°F | 35% | 23% | 9 h 20 min |
| December 11 | 45°F | 29°F | 35% | 23% | 9 h 20 min |
| December 12 | 44°F | 29°F | 35% | 23% | 9 h 20 min |
| December 13 | 44°F | 29°F | 35% | 23% | 9 h 20 min |
| December 14 | 44°F | 28°F | 35% | 23% | 9 h 20 min |
| December 15 | 43°F | 28°F | 35% | 23% | 9 h 20 min |
| December 16 | 43°F | 28°F | 35% | 23% | 9 h 20 min |
| December 17 | 43°F | 28°F | 35% | 23% | 9 h 20 min |
| December 18 | 43°F | 28°F | 35% | 23% | 9 h 20 min |
| December 19 | 42°F | 27°F | 35% | 23% | 9 h 20 min |
| December 20 | 42°F | 27°F | 35% | 23% | 9 h 20 min |
| December 21 | 42°F | 27°F | 35% | 23% | 9 h 20 min |
| December 22 | 42°F | 27°F | 35% | 22% | 9 h 20 min |
| December 23 | 41°F | 26°F | 35% | 22% | 9 h 20 min |
| December 24 | 41°F | 26°F | 35% | 22% | 9 h 20 min |
| December 25 | 41°F | 26°F | 35% | 22% | 9 h 20 min |
| December 26 | 41°F | 26°F | 35% | 22% | 9 h 20 min |
| December 27 | 41°F | 26°F | 35% | 22% | 9 h 20 min |
| December 28 | 40°F | 25°F | 35% | 22% | 9 h 20 min |
| December 29 | 40°F | 25°F | 35% | 22% | 9 h 20 min |
| December 30 | 40°F | 25°F | 35% | 22% | 9 h 20 min |
| December 31 | 40°F | 25°F | 35% | 22% | 9 h 20 min |
- Normal high
- 43°FDecember average
- Normal low
- 28°FDecember average
- Precipitation
- 3.51 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 USW00014712; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Reading in December?
On a given December day the chance of 0.01 inch or more is 35% on average, highest around December 16 (35%). In all, 3.51 in falls on 11 days of a normal December, 1 of them with an inch or more.
In a normal December in Reading, 23 nights fall to freezing and 4 days stay below freezing all day.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00014712.
What are the records for December in Reading?
The warmest December temperature on Reading's official record (since 1888) is 77°F, on December 30, 1984; the coldest is −6°F, on December 30, 1917. The wettest December brought 8.89 in (1983); the snowiest, 27.1 inches (1966).
The December mean against the 1991-2020 normal of 35.7°F: 2021 41.6°F (+5.9), 2022 35.3°F (−0.4), 2023 41.5°F (+5.8), 2024 35.3°F (−0.4), 2025 31.7°F (−4.0). 2 of 5 ran warmer than normal.
| December | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 41.6°F | +5.9°F | 0.68 in |
| 2022 | 35.3°F | −0.4°F | 4.24 in |
| 2023 | 41.5°F | +5.8°F | 7.72 in |
| 2024 | 35.3°F | −0.4°F | 3.50 in |
| 2025 | 31.7°F | −4.0°F | 2.21 in |
Source: records: ACIS, NWS threaded record RDGthr; recent months: ACIS, station USW00014712. Records and recent months use complete months only.
How does December in Reading 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; Reading's is 43°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- Reading in November54°F by day, 35°F at night
- Reading in January39°F by day, 23°F at night
- Reading 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