Herndon Weather in October

October in Herndon brings pleasant temperatures around 20°C (68°F) during the day, dropping to 8°C (46°F) at night, with the most rainfall of the year.

Rainfall in Herndon in October

Given that this is the rainiest month, it's wise to carry an umbrella to stay dry during unexpected showers. You can expect rain on around 11 days based on historical patterns, with 134 mm (5.3 in) average for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Herndon in October

If you're visiting Herndon in October, expect highs of 20°C (68°F) and overnight lows around 8°C (46°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. Nights fall to 8°C (46°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.

Sunshine in Herndon in October

The month enjoys around 205 hours of sunshine, creating mostly sunny days with good weather conditions.

So this is a great month to visit if you prefer dry days with pleasant temperatures.