Climate in Harrisburg: average temperature by month
In Harrisburg the warmest month is July, with 30.5 °C on average in the afternoon; the coolest is January, with 3.5 °C.
Measured at the weather station Carlisle Wtp, 26 km away.
| Month | Average high | Coolest to warmest day |
|---|---|---|
| January | 3.5 °C | 2.8 °C – 4.8 °C |
| February | 5.1 °C | 3.4 °C – 7.7 °C |
| March | 10.4 °C | 7.9 °C – 13.4 °C |
| April | 16.8 °C | 13.7 °C – 19.1 °C |
| May | 22.5 °C | 19.3 °C – 26.1 °C |
| June | 28.2 °C | 26.3 °C – 30.3 °C |
| July | 30.5 °C | 29.6 °C – 31.0 °C |
| August | 28.8 °C | 27.8 °C – 29.6 °C |
| September | 25.1 °C | 22.1 °C – 27.7 °C |
| October | 19.0 °C | 15.9 °C – 22.0 °C |
| November | 11.4 °C | 7.8 °C – 15.6 °C |
| December | 5.8 °C | 4.8 °C – 7.6 °C |