Herndon Weather in April

The climate in Herndon during April can be summarized as mild and reasonably dry.

April is in the spring in Herndon and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a cool 19°C (66°F), whilst at night 5°C (41°F) is normal.

On average April is the 3rd driest month of the year in Herndon with around 79mm 3.1 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 10 days, although this may vary considerably.

On the flip side this corresponds to an average of 8.1 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 Herndon in April 2024.