New Castle weather in December: New Castle, Pennsylvania: normal highs, lows, rain and records for December
New Castle in December has a normal high of 42°F and a normal low of 25°F, a daily mean of 33°F, falling from 46°F on the 1st to 38°F by the 31st. Measurable precipitation falls on 14 days in a normal December, 3.13 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 5°C and low of −4°C, 80 mm of precipitation and 12 cm of snow in December.
- NOAA stationNew Castle (1 mi N)
- Station IDUSC00366233
- Location41.02°N 80.36°W
- Elevation825 ft (252 m)
- Population21,332
- Jan 37° 19°
- Feb 40° 20°
- Mar 49° 27°
- Apr 63° 36°
- May 73° 47°
- Jun 82° 56°
- Jul 86° 60°
- Aug 85° 59°
- Sep 79° 52°
- Oct 66° 41°
- Nov 53° 32°
- Dec 42° 25°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is New Castle in December?
The normal high is 42°F and the normal low 25°F, for a daily mean of 33.3°F. December is 9.1°F cooler than November and 5.4°F warmer than January. December is the 10th warmest month of the year in New Castle and the 8th wettest. Across the month the normal high falls 8°F, from 46°F on December 1 to 38°F on December 31. From one year to the next December's mean temperature typically moves about 4.3°F either way (NOAA's standard deviation), so roughly two Decembers in three average between 29°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 49%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 46°F | 28°F | 45% | 23% |
| December 8 | 44°F | 27°F | 46% | 23% |
| December 15 | 42°F | 25°F | 46% | 24% |
| December 22 | 40°F | 24°F | 48% | 24% |
| December 31 | 38°F | 22°F | 49% | 24% |
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 | 46°F | 28°F | 45% | 23% | 9 h 30 min |
| December 2 | 46°F | 28°F | 45% | 23% | 9 h 30 min |
| December 3 | 46°F | 28°F | 45% | 23% | 9 h 30 min |
| December 4 | 45°F | 27°F | 45% | 23% | 9 h 20 min |
| December 5 | 45°F | 27°F | 45% | 23% | 9 h 20 min |
| December 6 | 45°F | 27°F | 45% | 23% | 9 h 20 min |
| December 7 | 44°F | 27°F | 45% | 23% | 9 h 20 min |
| December 8 | 44°F | 27°F | 46% | 23% | 9 h 20 min |
| December 9 | 44°F | 26°F | 46% | 23% | 9 h 20 min |
| December 10 | 43°F | 26°F | 46% | 23% | 9 h 20 min |
| December 11 | 43°F | 26°F | 46% | 23% | 9 h 20 min |
| December 12 | 43°F | 26°F | 46% | 23% | 9 h 20 min |
| December 13 | 42°F | 26°F | 46% | 24% | 9 h 20 min |
| December 14 | 42°F | 25°F | 46% | 24% | 9 h 20 min |
| December 15 | 42°F | 25°F | 46% | 24% | 9 h 20 min |
| December 16 | 42°F | 25°F | 47% | 24% | 9 h 10 min |
| December 17 | 41°F | 25°F | 47% | 24% | 9 h 10 min |
| December 18 | 41°F | 25°F | 47% | 24% | 9 h 10 min |
| December 19 | 41°F | 24°F | 47% | 24% | 9 h 10 min |
| December 20 | 41°F | 24°F | 47% | 24% | 9 h 10 min |
| December 21 | 40°F | 24°F | 47% | 24% | 9 h 10 min |
| December 22 | 40°F | 24°F | 48% | 24% | 9 h 10 min |
| December 23 | 40°F | 24°F | 48% | 24% | 9 h 10 min |
| December 24 | 40°F | 23°F | 48% | 24% | 9 h 10 min |
| December 25 | 39°F | 23°F | 48% | 24% | 9 h 10 min |
| December 26 | 39°F | 23°F | 48% | 24% | 9 h 10 min |
| December 27 | 39°F | 23°F | 48% | 24% | 9 h 10 min |
| December 28 | 39°F | 23°F | 48% | 24% | 9 h 10 min |
| December 29 | 39°F | 22°F | 49% | 24% | 9 h 10 min |
| December 30 | 38°F | 22°F | 49% | 24% | 9 h 20 min |
| December 31 | 38°F | 22°F | 49% | 24% | 9 h 20 min |
- Normal high
- 42°FDecember average
- Normal low
- 25°FDecember average
- Precipitation
- 3.13 inmonth total
- Days with precipitation
- 140.01 inch or more
- Snowfall
- 4.9 inmonth total
- Nights at 32°F or colder
- 24
- Daylight
- 9 h 30 min to 9 h 20 minDecember 1 to December 31
- Sunshine
- 47%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00366233; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in New Castle in December?
On a given December day the chance of 0.01 inch or more is 47% on average, highest around December 31 (49%). In all, 3.13 in falls on 14 days of a normal December, 1 of them with an inch or more.
In a normal December in New Castle, 24 nights fall to freezing, 6 days stay below freezing all day and snowfall averages 4.9 inches.
Snow falls on 4 days in a normal December, and an inch or more covers the ground on 7 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00366233.
What are the records for December in New Castle?
The warmest December temperature on this station's record (since 1894) is 76°F, on December 3, 1982; the coldest is −17°F, on December 17, 1951. The wettest December brought 5.75 in (2012); the snowiest, 28.8 inches (1954).
Source: records: ACIS, station USC00366233. Records and recent months use complete months only.
How does December in New Castle 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; New Castle's is 42°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- New Castle in November53°F by day, 32°F at night
- New Castle in January37°F by day, 19°F at night
- New Castle 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