Herndon, Virginia, United States of America: What to pack, what to wear, and when to go [2021]

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Traveling to Herndon, Virginia, United States of America? If you're planning to go to Herndon, below is some important information about when to go, what to wear, and what to pack.

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When to go to Herndon, Virginia, United States of America

Based on the climate and weather in Herndon, the best time to go is September. See below for details.

Important esssentials for Herndon, Virginia, United States of America

Here are some general tips on what to wear in Herndon, as well as several items to remember to pack when traveling there.

What to wear/what to pack for Herndon, Virginia, United States of America by month

January

In January, Herndon is brisk, snowy and somewhat rainy. Temperatures routinely are in the low 40s F (single digits C) and about a third of the time jump into the low 50s F (single digits C) range. At night, lows are in the low 20s F (single digits below 0 C).

During your visit, you can expect several inches of snow. This is also a rainy time for Herndon, with several of the days of the month having rain. In January, humidity reaches as high as 60%.

What to wear/what to pack:

February

February in Herndon can be brisk and snowy. The average overnight temperatures in the area are in the 20s F (single digits below 0 C).

It tends to rain regularly. With the colder weather comes lower humidity, which is in the 50% to 50% range on average.

What to wear/what to pack:

March

If you go to Herndon in March, you will notice that it can be brisk and somewhat rainy. Expect it to rain 5-10 days this month. Daytime temperatures are in the 50s F (low 10s C).

What to wear/what to pack:

April

If you vacation in Herndon during April, you might find that it is crisp and somewhat rainy. Temperatures tend to hover around the 60s F (high 10s C) during the day, while at night they can dip into the high 30s F (single digits C).

Humidity is generally between 40 and 50% during the day. In terms of precipitation, you can expect it to rain 5-10 days this month.

What to wear/what to pack:

May

May in Herndon is warm and somewhat rainy. The average overnight temperatures in the area are in the low 50s F (single digits C).

It tends to rain regularly. With the colder weather comes lower humidity, which is in the 50% to 60% range on average.

What to wear/what to pack:

June

June in Herndon is pretty consistently hot. Temperatures average in the low 80s F (high 20s C) during the day. It rains regularly.

What to wear/what to pack:

July

In July, Herndon is consistently hot and somewhat rainy. Temperatures routinely are in the 80s F (low 30s C) and about half of the time jump into the low 90s F (low 30s C) range. At night, lows are in the 60s F (high 10s C).

This is also a rainy time for Herndon, with several of the days of the month having rain. In July, humidity reaches as high as 60%.

What to wear/what to pack:

August

August here is extremely warm. Temperatures average in the 80s F (high 20s C) during the day. It rains 5-10 days this month.

What to wear/what to pack:

September

September in Herndon is a perfect temperature. The rain can amount to several inches/centimeters.

During this time, temperatures average in the high 70s F (mid 20s C), although night temperatures can dip into the low 50s F (single digits C).

What to wear/what to pack:

October

If you vacation in Herndon during October, you are likely to see that it is mild. Temperatures tend to hover around the 60s F (high 10s C) during the day, while at night they can dip into the low 40s F (single digits C).

Humidity is generally between 50 and 60% during the day. In terms of precipitation, you can expect it to rain about a third of the time.

What to wear/what to pack:

November

If you vacation in Herndon during November, you might find that it is crisp. Temperatures tend to hover around the 50s F (low 10s C) during the day, while at night they can dip into the 30s F (single digits C).

Humidity is generally between 50 and 60% during the day. In terms of precipitation, you can expect it to rain regularly.

What to wear/what to pack:

December

December in Herndon is brisk. The average overnight temperatures in the area are in the high 20s F (single digits below 0 C).

It tends to rain 5-10 days this month. But the colder weather doesn't bring low humidity, which is in the 50% to 60% range on average.

What to wear/what to pack:

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