Click on a day for an hourly weather forecast
The temperatures in Manassas in May are comfortable with low of 13°C and and high up to 24°C.
You can expect rain for roughly half of the month of May in Manassas. 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 Manassas in May 2025.
If you’re planning to visit Manassas in the near future, we highly recommend that you review the 14 day weather forecast for Manassas before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 5° / -3° | 6 | 19 | 7 | 101 mm | Awful | Manassas in January |
| February | 7° / -2° | 7 | 15 | 6 | 112 mm | Awful | Manassas in February |
| March | 12° / 3° | 8 | 20 | 4 | 126 mm | Awful | Manassas in March |
| April | 19° / 8° | 7 | 23 | 0 | 127 mm | Ok | Manassas in April |
| May | 24° / 13° | 9 | 22 | 0 | 160 mm | Good | Manassas in May |
| June | 29° / 17° | 6 | 24 | 0 | 129 mm | Good | Manassas in June |
| July | 32° / 20° | 6 | 25 | 0 | 132 mm | Good | Manassas in July |
| August | 31° / 19° | 6 | 25 | 0 | 129 mm | Good | Manassas in August |
| September | 27° / 16° | 5 | 25 | 0 | 113 mm | Perfect | Manassas in September |
| October | 20° / 10° | 5 | 26 | 0 | 130 mm | Good | Manassas in October |
| November | 13° / 4° | 5 | 25 | 0 | 95 mm | Ok | Manassas in November |
| December | 8° / 1° | 6 | 21 | 3 | 130 mm | Bad | Manassas in December |