Manassas Weather in May

The climate in Manassas during May can be summarized as mild and a little damp.

May is in the spring in Manassas and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a comfortable 24°C (75°F), whilst at night 11°C (53°F) is normal.

On average May is the 2nd wettest month of the year in Manassas with around 93mm 3.7 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 12 days, although this may vary considerably.

On the flip side this corresponds to an average of 9 hours of sunshine per day.

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Manassas in May 2025.