Mount Joy, Pennsylvania's Weather Summary For December Of 2021
| Max | Lowest Max | Minimum | Highest Minimum | |
|---|---|---|---|---|
| Temperature | 66.9 ℉ on | 36 ℉ on | 18.1 ℉ on | 44.6 ℉ on |
| Dew Point | 57.4 ℉ on | 21.3 ℉ ℉ on | 10.8 ℉ on | 44.1 ℉ on |
| Feels Like | 66.9 ℉ on | 36 ℉ on | 12.9 ℉ on | 43 ℉ on |
- It did not stay below freezing this month.
- It dropped below freezing on 18 days this month.
- It did not get above 90 ℉ during December.
- There were 745 heating degree during the month of December.
- The narrowest temperature range was 5.6℉ on and the widest temperature range was on 31.5℉ on .
- The windiest day of the month was on when the wind averaged 23.5 mph
- 5.8 mph was the lowest average wind during this and it occurred on .
- The highest wind gust this month was 38.9 mph on
- The lowest wind gust this month was 7.4 mph on .
- We had lighting on 1 day during the month of December.
- The most lightning strikes in a day this month was 1 on .
- The most lightning strikes in a day this month was 1 on .
- There were 12 days this month when we had rain.
- The daily maximum rainfall this month was 0.3 ″ on .
- The wettest period was 4 days that ended on .
- The Driest period lasted 6 days that ended on .
- December's monthly rainfall was 0.83 inches.
- The heaviest rain rate was 0.8 ″ on .
- The barometric pressure ranged from a low of 29.51 inches of mercury on to a high of 30.64 inches of mercury on .
- The lowest humidiy recorded during December was 21% on .