Effingham weather in December: Effingham, Illinois: normal highs, lows, rain and records for December
Effingham in December has a normal high of 42°F and a normal low of 25°F, a daily mean of 34°F, falling from 47°F on the 1st to 38°F by the 31st. Measurable precipitation falls on 10 days in a normal December, 2.77 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 6°C and low of −4°C, 70 mm of precipitation and 6 cm of snow in December.
- NOAA stationEffingham (3 mi SW)
- Station IDUSC00112687
- Location39.12°N 88.62°W
- Elevation625 ft (191 m)
- From the center4 miles
- Population12,434
- Jan 37° 20°
- Feb 43° 23°
- Mar 54° 32°
- Apr 66° 42°
- May 76° 54°
- Jun 85° 63°
- Jul 89° 66°
- Aug 87° 64°
- Sep 81° 56°
- Oct 69° 44°
- Nov 54° 34°
- 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 Effingham in December?
The normal high is 42°F and the normal low 25°F, for a daily mean of 33.8°F. December is 10.1°F cooler than November and 5.0°F warmer than January. December is the 10th warmest month of the year in Effingham and the 11th wettest. Across the month the normal high falls 9°F, from 47°F on December 1 to 38°F on December 31. From one year to the next December's mean temperature typically moves about 4.2°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 33%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| December 1 | 47°F | 29°F | 33% | 21% |
| December 8 | 45°F | 27°F | 33% | 20% |
| December 15 | 42°F | 26°F | 32% | 20% |
| December 22 | 40°F | 24°F | 31% | 19% |
| December 31 | 38°F | 22°F | 30% | 19% |
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 | 29°F | 33% | 21% | 9 h 40 min |
| December 2 | 47°F | 29°F | 33% | 21% | 9 h 40 min |
| December 3 | 46°F | 28°F | 33% | 20% | 9 h 40 min |
| December 4 | 46°F | 28°F | 33% | 20% | 9 h 40 min |
| December 5 | 46°F | 28°F | 33% | 20% | 9 h 30 min |
| December 6 | 45°F | 28°F | 33% | 20% | 9 h 30 min |
| December 7 | 45°F | 27°F | 33% | 20% | 9 h 30 min |
| December 8 | 45°F | 27°F | 33% | 20% | 9 h 30 min |
| December 9 | 44°F | 27°F | 33% | 20% | 9 h 30 min |
| December 10 | 44°F | 27°F | 33% | 20% | 9 h 30 min |
| December 11 | 44°F | 27°F | 33% | 20% | 9 h 30 min |
| December 12 | 43°F | 26°F | 33% | 20% | 9 h 30 min |
| December 13 | 43°F | 26°F | 33% | 20% | 9 h 30 min |
| December 14 | 43°F | 26°F | 32% | 20% | 9 h 30 min |
| December 15 | 42°F | 26°F | 32% | 20% | 9 h 30 min |
| December 16 | 42°F | 25°F | 32% | 20% | 9 h 30 min |
| December 17 | 42°F | 25°F | 32% | 20% | 9 h 30 min |
| December 18 | 41°F | 25°F | 32% | 19% | 9 h 30 min |
| December 19 | 41°F | 25°F | 32% | 19% | 9 h 30 min |
| December 20 | 41°F | 25°F | 32% | 19% | 9 h 30 min |
| December 21 | 41°F | 24°F | 32% | 19% | 9 h 20 min |
| December 22 | 40°F | 24°F | 31% | 19% | 9 h 20 min |
| December 23 | 40°F | 24°F | 31% | 19% | 9 h 20 min |
| December 24 | 40°F | 24°F | 31% | 19% | 9 h 30 min |
| December 25 | 40°F | 23°F | 31% | 19% | 9 h 30 min |
| December 26 | 39°F | 23°F | 31% | 19% | 9 h 30 min |
| December 27 | 39°F | 23°F | 31% | 19% | 9 h 30 min |
| December 28 | 39°F | 23°F | 31% | 19% | 9 h 30 min |
| December 29 | 39°F | 23°F | 30% | 19% | 9 h 30 min |
| December 30 | 39°F | 22°F | 30% | 19% | 9 h 30 min |
| December 31 | 38°F | 22°F | 30% | 19% | 9 h 30 min |
- Normal high
- 42°FDecember average
- Normal low
- 25°FDecember average
- Precipitation
- 2.77 inmonth total
- Days with precipitation
- 100.01 inch or more
- Snowfall
- 2.4 inmonth total
- Nights at 32°F or colder
- 24
- Daylight
- 9 h 40 min to 9 h 30 minDecember 1 to December 31
- Sunshine
- 61%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00112687; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain or snow in Effingham in December?
On a given December day the chance of 0.01 inch or more is 32% on average, highest around December 1 (33%). In all, 2.77 in falls on 10 days of a normal December, 1 of them with an inch or more.
In a normal December in Effingham, 24 nights fall to freezing, 6 days stay below freezing all day and snowfall averages 2.4 inches.
Snow falls on 2 days in a normal December, and an inch or more covers the ground on 4 days.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00112687.
What are the records for December in Effingham?
The warmest December temperature on this station's record (since 1892) is 74°F, on December 15, 1948; the coldest is −17°F, on December 28, 1924. The wettest December brought 9.89 in (1967); the snowiest, 25.5 inches (1973).
Source: records: ACIS, station USC00112687. Records and recent months use complete months only.
How does December in Effingham compare across Illinois?
Across the 144 places PlainClimate covers in Illinois, December normal highs run from 33°F in Galena to 48°F in Anna; Effingham's is 42°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.