Kathmandu weather in September 2025

Expect 28°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Kathmandu in September. Check more long-term weather averages for Kathmandu in September before you book your next holiday to Nepal in 2025/2026.

  • 28°C maximum daytime temperature in September in Kathmandu28
    28°C max day temperature
  • 4 hours of sunshine per day
  • 10 days with some rainfall in September in Kathmandu10
    10 days with some rainfall
  • 18°C minimum night-time temperature in September in Kathmandu18
    18°C min night temperature
  • 12 hours of daylight per day in September in Kathmandu12
    12 hours of daylight per day
  • Low heat & humidity in September in KathmanduL
    Low heat & humidity
  • 323 mm monthly rainfall in September in Kathmandu323
    323 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in September in Kathmandu11
    11 (Extreme) UV index

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The September weather guide for Nepal (Kathmandu) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Kathmandu in September?

Daytime temperatures usually reach 28°C in Kathmandu in September with low heat and humidity, falling to 18°C at night.

How sunny is it in Kathmandu in September?

There are normally 4 hours of bright sunshine each day in Kathmandu in September - that's 31% of daylight hours.

Does it rain in Kathmandu in September?

There are usually 10 days with some rain in Kathmandu in September and the average monthly rainfall is 323mm.

What is the chance of a cyclone in Kathmandu in September?

On average less than 1 day in September in Kathmandu is likely to be affected by the passage of one or more tropical storms.

Kathmandu September sunrise & sunset times

Browse the sunrise and sunset times for Kathmandu in September 2025. Select a month to view Kathmandu sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:43 18:25
Monday, 15th September 2025 05:49 18:09
Tuesday, 30th September 2025 05:56 17:51

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