Kathmandu in September
In September, Kathmandu averages 28°C (82°F) during the day and 18°C (64°F) at night, with frequent rain — about 15 days of the month see precipitation (200 mm total).
ShoulderConditions are warm and beach-friendly. Plan for unsettled weather and bring rain gear.
September offers comfortable temperatures in Kathmandu, with some rain to plan around.
How September compares to the rest of the year in Kathmandu
September is in the middle of the year for warmth in Kathmandu (6th of 12) and moderately rainy compared to the rest of the year (4th of 12). Daytime temperature runs 3°C above the annual average (25°C). September runs roughly the same as August (28°C) and cools 2°C in October (26°C).
September sunrise & sunset in Kathmandu
Times shown for Kathmandu local time (Asia/Kathmandu), calculated for the 15th of September. They shift by a few minutes day to day across the month.
Photography light in Kathmandu — September
Golden-hour and blue-hour windows for the 15th of September, in Kathmandu's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — Kathmandu in September
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on September's tier (Shoulder) and Kathmandu's popularity.
Crowds & pricing — September in Kathmandu
Kathmandu is in a shoulder season month — fewer crowds, slightly lower prices, and a calmer atmosphere than peak weeks. Most major sights stay open with normal hours, though a handful of seasonal restaurants or boat trips may run reduced schedules. Many regulars consider these months the best time to visit because you trade a small amount of weather reliability for a much more pleasant on-the-ground experience.
Why this tier: comfortable tourism weather
Sun & mosquito risk — September in Kathmandu
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
Kathmandu in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 18°C / 64°F | 2°C / 36°F | 15 mm | 2 | 0 |
| February | 20°C / 68°F | 5°C / 41°F | 30 mm | 3 | 0 |
| March | 25°C / 77°F | 8°C / 46°F | 40 mm | 5 | 0 |
| April | 28°C / 82°F | 12°C / 54°F | 55 mm | 7 | 0 |
| May | 29°C / 84°F | 16°C / 61°F | 120 mm | 11 | 0 |
| June | 29°C / 84°F | 19°C / 66°F | 235 mm | 15 | 0 |
| July | 28°C / 82°F | 20°C / 68°F | 365 mm | 21 | 0 |
| August | 28°C / 82°F | 19°C / 66°F | 330 mm | 20 | 0 |
| September | 28°C / 82°F | 18°C / 64°F | 200 mm | 15 | 0 |
| October | 26°C / 79°F | 13°C / 55°F | 55 mm | 5 | 0 |
| November | 23°C / 73°F | 7°C / 45°F | 5 mm | 1 | 0 |
| December | 19°C / 66°F | 3°C / 37°F | 5 mm | 1 | 0 |
Other cities with similar September weather
🌍 See the full ranked list of climate twins for Kathmandu in September →
Frequently asked questions
How hot is Kathmandu in September?
In September, Kathmandu averages a high of 28°C (82°F) and a low of 18°C (64°F) — generally warm.
Does it rain a lot in Kathmandu in September?
September is quite rainy in Kathmandu, with about 15 rainy days on average.
Is September a good time to visit Kathmandu?
September is warm but on the rainy side. It suits travelers who are comfortable with warm weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for Kathmandu in September?
Pack lightweight, breathable clothing, sunglasses and sunscreen, plus a compact umbrella or rain jacket. See the full September packing list for Kathmandu for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.