Plymouth, Sunday, 9 August, 16:04
Heavy rain. Feels like 89°. High 84°, low 62°.
In December, Plymouth, IN averages a high of 36.5° and a low of 24.2°. About 2.8 inches of precipitation fall over the month (11 wet days). The record high is 69.4° (1982) and the record low -21.1° (1983). Normals are computed over the last 60 years.
| Day | High | Low | Chance of precip. | Record high | Record low |
|---|---|---|---|---|---|
| 1 | 39.9° | 28.4° | 38% | 66° (1970) | 12.6° (1964) |
| 2 | 40.6° | 28.2° | 30% | 69.4° (1982) | 2.3° (1976) |
| 3 | 40.8° | 28.8° | 43% | 66.2° (1982) | 0.9° (1976) |
| 4 | 39.7° | 27.9° | 30% | 63.9° (1998) | 3.2° (1991) |
| 5 | 39.2° | 26.8° | 38% | 66.6° (2001) | 2.8° (1991) |
| 6 | 37.8° | 26.2° | 30% | 63° (1998) | 3.2° (1964) |
| 7 | 36.9° | 25.9° | 32% | 58.5° (1966) | -6.5° (1972) |
| 8 | 37.4° | 26.1° | 30% | 61.9° (1991) | -2.9° (2005) |
| 9 | 38.3° | 25.5° | 43% | 56.7° (2023) | -3.1° (1977) |
| 10 | 36.9° | 25° | 28% | 62.1° (1971) | -2.9° (1977) |
| 11 | 36.1° | 24.8° | 27% | 60.8° (2021) | -6.7° (1972) |
| 12 | 38.1° | 24.8° | 35% | 66.6° (2015) | -4.4° (2000) |
| 13 | 37.8° | 24.8° | 28% | 63° (2015) | -9.4° (2000) |
| 14 | 38.3° | 25.7° | 32% | 63.7° (1975) | -3.5° (1985) |
| 15 | 38.7° | 25.7° | 38% | 61.9° (1971) | -0.8° (2025) |
| 16 | 36.3° | 24.8° | 35% | 62.2° (1984) | -2.9° (1989) |
| 17 | 33.6° | 23.4° | 22% | 55.8° (2006) | -7.6° (1989) |
| 18 | 33.8° | 21.9° | 30% | 54.1° (2002) | -5.6° (2000) |
| 19 | 34.5° | 22.6° | 35% | 53.6° (2002) | -17° (2016) |
| 20 | 34.9° | 22.3° | 33% | 58.5° (1988) | -5.6° (1989) |
| 21 | 34.7° | 22.6° | 35% | 60.6° (1967) | -12.1° (1989) |
| 22 | 35.2° | 22.6° | 32% | 56.7° (1990) | -11.9° (1989) |
| 23 | 36° | 23° | 42% | 60.4° (2015) | -15.7° (1983) |
| 24 | 33.6° | 20.7° | 38% | 59° (2015) | -21.1° (1983) |
| 25 | 32° | 19.9° | 28% | 61.5° (1982) | -16.8° (1983) |
| 26 | 33.1° | 19.8° | 40% | 61° (2019) | -13.7° (1983) |
| 27 | 35.2° | 21.9° | 35% | 61.9° (2008) | -4.4° (1990) |
| 28 | 36.3° | 22.6° | 33% | 62.8° (1984) | -8.9° (2017) |
| 29 | 35.2° | 23° | 40% | 62.1° (1984) | -6.5° (1961) |
| 30 | 34.7° | 21.9° | 38% | 57.9° (1992) | -14.8° (1983) |
| 31 | 34.5° | 22.5° | 52% | 59.2° (2004) | -18.4° (1963) |