Herndon

What is the climate like in Herndon?

The best time to visit Herndon is typically October, the year's most comfortable month (6.8/10). Herndon is warmest in July, when daily highs average 90°F (32°C), and coolest in January, when lows fall to about 30°F (-1°C). The wettest month is typically July and the driest is November; the year sees roughly 45 in of precipitation.

• Best time to visitOctober — the year's comfort peak (6.8/10)
• Warmest monthJuly — average high 90°F (32°C)
• Coolest monthJanuary — average low 30°F (-1°C)
• Wettest monthJuly (5.2 in)
• Driest monthNovember (2.9 in)
• Annual precipitation45 in