Washington DC · Month comparison
September vs October
October ranks #1 overall vs September at #5. Fall foliage on the Mall, Marine Corps Marathon, crisp air — October rivals April for DC's best.
September
#5 of 12 months
Best match
Autumn energy returns — National Book Festival, pleasant temperatures, fewer crowds.
- ↑National Book Festival on the Mall (early September): free, with major authors from across America — one of DC's best events
- ↑Congress returns: the political energy of the city is palpable when it's in session
October
#1 of 12 months
Best match
Fall foliage on the Mall, Marine Corps Marathon, crisp air — October rivals April for DC's best.
- ↑Fall foliage across the National Mall, Rock Creek Park, and Georgetown: red and gold that genuinely rivals New England
- ↑Marine Corps Marathon (late October): 30,000 runners through Washington's most scenic monuments — spectacular spectator event
| Factor | September | October |
|---|---|---|
| Weather score | 8 | 9 |
| Value score | 5 | 5 |
| Crowd score | 5 | 5 |
| Events score | 7 | 7 |
| Atmosphere | 8 | 9 |
| Avg high temp | 26°C | 19°C |
| Monthly rain | 90mm | 80mm |
| Daily sunshine | 7hrs | 6.5hrs |
September trade-offs
- ↓Summer tourism trailing into September; still busy on weekends at the major memorials
- ↓School groups return — weekday mornings at Smithsonians resume student-visit busy periods
- ↓90mm of rainfall means the occasional heavy September storm
October trade-offs
- ↓Moderate tourism continues through October; not the quiet shoulder it once was
- ↓Marine Corps Marathon weekend significantly affects transport and accommodation around the Mall
- ↓Foliage peaks vary year to year — late October to early November is the typical window
Scores compare months within Washington DC. Climate data: Open Meteo ERA5 30-year normals (1991–2020). Methodology →