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Draft data. Times, fares and step counts are desk estimates awaiting field checks. Unknown times stay unknown. How we verify

When to go · Herndon

Herndon, month by month

The best months for Herndon: Apr, May, Jun, Sep, Oct. Months to avoid: Jan, Feb, Jul, Aug, Dec.

Month by month

  1. JanuaryAvoidListed as a month to avoid: Jul–Aug (heat and humidity), late Dec–Feb (ice, short days).6 °C / -4 °C, 10 rain daysCrowds: Low
  2. FebruaryAvoidListed as a month to avoid: Jul–Aug (heat and humidity), late Dec–Feb (ice, short days).8 °C / -3 °C, 9 rain daysCrowds: Low · 1 festival or holiday
  3. MarchGoodOutside the best window (Apr–Jun, Sep–Oct). Across United States: Spring break fills Florida beaches and parks; the desert parks come into season.13 °C / 1 °C, 10 rain daysCrowds: Medium · 2 festivals or holidays
  4. AprilGreatInside Herndon's best window: Apr–Jun, Sep–Oct.19 °C / 6 °C, 10 rain daysCrowds: Medium · 1 festival or holiday
  5. MayGreatInside Herndon's best window: Apr–Jun, Sep–Oct.24 °C / 12 °C, 11 rain daysCrowds: Medium · 1 festival or holiday
  6. JuneGreatInside Herndon's best window: Apr–Jun, Sep–Oct.29 °C / 17 °C, 10 rain daysCrowds: High
  7. JulyAvoidListed as a month to avoid: Jul–Aug (heat and humidity), late Dec–Feb (ice, short days).32 °C / 20 °C, 11 rain daysCrowds: High · 1 festival or holiday
  8. AugustAvoidListed as a month to avoid: Jul–Aug (heat and humidity), late Dec–Feb (ice, short days).31 °C / 19 °C, 9 rain daysCrowds: High
  9. SeptemberGreatInside Herndon's best window: Apr–Jun, Sep–Oct.27 °C / 15 °C, 8 rain daysCrowds: Medium · 1 festival or holiday
  10. OctoberGreatInside Herndon's best window: Apr–Jun, Sep–Oct.20 °C / 8 °C, 8 rain daysCrowds: Medium
  11. NovemberMixedOutside the best window (Apr–Jun, Sep–Oct). Across United States: Quiet between holidays; Thanksgiving week is the busiest travel period of the year.14 °C / 3 °C, 9 rain daysCrowds: Medium · 1 festival or holiday
  12. DecemberAvoidListed as a month to avoid: Jul–Aug (heat and humidity), late Dec–Feb (ice, short days).8 °C / -2 °C, 10 rain daysCrowds: High · 1 festival or holiday