Click on a day for an hourly weather forecast
The temperatures in Harrisburg in May are comfortable with low of 11°C and and high up to 21°C.
You can expect rain for roughly half of the month of May in Harrisburg. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Harrisburg in May 2025.
If you’re planning to visit Harrisburg in the near future, we highly recommend that you review the 14 day weather forecast for Harrisburg before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 1° / -6° | 7 | 15 | 10 | 89 mm | Awful | Harrisburg in January |
| February | 4° / -5° | 7 | 13 | 9 | 111 mm | Awful | Harrisburg in February |
| March | 9° / 0° | 7 | 19 | 5 | 111 mm | Awful | Harrisburg in March |
| April | 15° / 5° | 8 | 21 | 1 | 122 mm | Ok | Harrisburg in April |
| May | 21° / 11° | 9 | 22 | 0 | 160 mm | Ok | Harrisburg in May |
| June | 26° / 15° | 9 | 21 | 0 | 155 mm | Good | Harrisburg in June |
| July | 29° / 17° | 9 | 22 | 0 | 180 mm | Ok | Harrisburg in July |
| August | 28° / 16° | 7 | 24 | 0 | 165 mm | Good | Harrisburg in August |
| September | 24° / 13° | 6 | 24 | 0 | 139 mm | Perfect | Harrisburg in September |
| October | 18° / 8° | 6 | 25 | 0 | 129 mm | Good | Harrisburg in October |
| November | 10° / 1° | 5 | 24 | 1 | 93 mm | Ok | Harrisburg in November |
| December | 5° / -2° | 7 | 19 | 6 | 111 mm | Awful | Harrisburg in December |