Best year time to visit Loudoun County

General weather information about Loudoun County

Average annual temperature is 13.7 °C

Absolute maximum temperature: 37.4 °C

Absolute minimum temperature: -9.9 °C

Number of sunny days: 187 days

Number of rainy days: 176 days

Number of snow days: 2 days

* Weather data for Loudoun County 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)	17.6	22.9	25.7	30.2	28.8	32.7	37.4	33.8	36.4	27.5	23.1	16.9
Average daytime temperature (°C)	9.2	11.7	12.8	21.4	22.5	27.2	31.7	30.4	26.3	20.5	12.8	9.8
Average temperature (°C)	4.9	5.9	6.5	14.3	15.9	20.6	25.0	24.0	20.4	14.6	7.0	5.1
Average night temperature (°C)	1.6	1.3	1.5	8.3	9.8	14.9	19.9	18.9	15.5	9.7	2.5	1.5
Absolute minimum temperature (°C)	-3.5	-9.9	-6.0	0.5	4.7	10.6	16.8	14.5	9.3	4.4	-5.7	-4.1

The best time to visit Loudoun County during the most sunny months:

The largest precipitation sum in Loudoun County is at

April — 123(mm)

June — 112(mm)

September — 150(mm)

December — 120(mm)

When is the best time to visit Loudoun County?

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

What is the weather like in Loudoun County?

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

How many sunny days does Loudoun County have?

The monthly weather statistics above show sunshine and rainfall patterns for Loudoun County throughout the year.