What to pack for Kathmandu in September
- t-shirts and light layers
- a light jacket for evenings
- a compact umbrella or rain shell — rain is frequent
- expect humid, sticky conditions
Humidity averages 90%; max daily wind around 7 km/h.
How September compares
Best months in Kathmandu: November–March. See the full best time to visit Kathmandu guide.
Kathmandu in September: the details
In September, Kathmandu sees average daytime highs of 26°C (79°F) and overnight lows of 19°C (66°F). Rainfall totals roughly 476 mm across 29 rainy days, and the sun shines about 8.4 hours per day with 12.2 hours of daylight mid-month. Relative humidity averages 90%.
In context: September is the 4th-warmest month and the third-wettest in Kathmandu. The sunniest month is April (11.1 h/day).
| Metric | September average |
|---|---|
| Daytime high | 26°C / 79°F |
| Overnight low | 19°C / 66°F |
| Rainfall | 476 mm over 29 rainy days |
| Sunshine | 8.4 h/day (12.2 h daylight) |
| Humidity | 90% |
| Travel score | 7.3 / 10 |
These figures are climate normals computed from the ERA5 weather reanalysis (2019–2024) for Kathmandu, Nepal (27.7, 85.32) — see our methodology. Actual conditions vary year to year.
Not set on Kathmandu? Browse the best places to visit in September ranked by travel score.
Frequently asked questions
How hot is Kathmandu in September?
Daytime highs in Kathmandu in September average 26°C (79°F); nights drop to about 19°C.
Does it rain in Kathmandu in September?
Expect around 29 rainy days and 476 mm of rainfall in September.
Is September a good time to visit Kathmandu?
September is a good month to visit Kathmandu. Overall travel score: 7.3/10. The best months are November–March.
Where should you go next month?
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