Best year time to visit Herndon Junction

General weather information about Herndon Junction

Average annual temperature is 14.4 °C

Absolute maximum temperature: 38.2 °C

Absolute minimum temperature: -9.2 °C

Number of sunny days: 182 days

Number of rainy days: 182 days

Number of snow days: 1 day

* Weather data for Herndon Junction United States is based on climate observations for 2026 year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	17.8	23.2	25.6	31.7	31.2	33.8	38.2	34.5	37.0	27.9	24.1	16.7
Average daytime temperature (°C)	9.8	12.2	13.1	22.3	23.6	27.8	32.3	30.9	27.0	21.2	13.6	10.4
Average temperature (°C)	5.5	6.5	7.1	15.2	16.8	21.4	25.8	24.7	21.1	15.2	7.7	5.7
Average night temperature (°C)	2.1	1.9	2.2	9.2	10.6	15.6	20.8	19.6	16.3	10.3	3.1	2.0
Absolute minimum temperature (°C)	-2.8	-9.2	-4.9	0.6	4.9	10.9	17.9	15.2	10.6	4.3	-5.2	-3.8

The best time to visit Herndon Junction during the most sunny months:

The largest precipitation sum in Herndon Junction is at

April — 117(mm)

June — 135(mm)

September — 149(mm)

December — 141(mm)

When is the best time to visit Herndon Junction?

The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Herndon Junction.

What is the weather like in Herndon Junction?

See average temperature, rainfall and daylight hours for Herndon Junction by month in the table above.

How many sunny days does Herndon Junction have?

The monthly weather statistics above show sunshine and rainfall patterns for Herndon Junction throughout the year.