What is the weather like in Kathmandu in September?

Expect temperatures between 18°C and 25°C with 83% average rain probability and about 8 hours of sunshine daily.

What is the weather like in Kathmandu in September?

Kathmandu in September scores 57/100 based on 30 years of climate data. Decent conditions for most activities.

Who should visit Kathmandu in September?

September in Kathmandu is ideal for: Business travelers.

Kathmandu Weather in September | 30-Year Forecast

Avg High

25°C

Hottest around day 1

Avg Low

18°C

Coolest around day 30

Rainy Days

30days

83% avg rain chance

Sunshine

8hrs/day

Autumn season

Essential Travel Info for Kathmandu

🗓️ Best Time to Visit 📖 Travel Guide 🍴 Food Guide

Currency

NPR

₨ Nepalese rupee

Language

Nepali

Driving

Left side

Connect

Most cafes & restaurants in tourist area...

Safety

High Safety

GPI: 1.947

Travel Intelligence

Exclusive flight analytics & health data for Kathmandu

Smart Flight Estimator

Airport-to-Airport Logistics

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Flight Connectivity Analysis

Airport traffic data & seasonal patterns

Moderate

47/ 100

Traffic Index

Balanced traffic

Peak Daily Arrivals

slots per day

Peak

Sep

Low

Jan

Monthly Traffic Distribution

Jan

Feb

Mar

Apr

May

150

Jun

157

Jul

158

Aug

171

Sep

169

Oct

156

Nov

166

Dec

Traffic Level

Low Season

Key Connections

New Delhi Indira Gandhi (DEL)

Pokhara (PKR)

Dubai (DXB)

Bhairawa Bhairahawa (BWA)

Biratnagar (BIR)

Health & Safety Advisory

CDC travel health recommendations

11 Recommendations

COVID-19

All eligible travelers should be up to date with their COVID-19 vaccines. Please seeYour COVID-19 Vaccinationfor more information.

Chikungunya

All travelers should take steps to prevent mosquito bites. Chikungunya vaccination is generally not recommended. Travelers who wish to consider vaccination can visit “What to consider before traveling” on thechikungunya vaccinespage to learn more.

Cholera

Active cholera transmission iswidespreadin Nepal. Cholera is rare in travelers.Certain factorsmay increase the risk of getting cholera or having severe disease (more information). Avoiding unsafe food and water and washing your hands can also help prevent cholera.Vaccination may be considered for children and adults who are traveling to areas of active cholera transmission.

Hepatitis A

Recommended for unvaccinated travelers one year old or older going to Nepal.Infants 6 to 11 months old should also be vaccinated against Hepatitis A. The dose does not count toward the routine 2-dose series.Travelers allergic to a vaccine component should receive a single dose of immune globulin, which provides effective protection for up to 2 months depending on dosage given.Unvaccinated travelers who are over 40 years old, are immunocompromised, or have chronic medical conditions planning to depart to a risk area in less than 2 weeks should get the initial dose of vaccine and at the same appointment receive immune globulin.

Hepatitis B

Recommended for unvaccinated travelers younger than 60 years old traveling to Nepal. Unvaccinated travelers 60 years and older may get vaccinated before traveling to Nepal.

Japanese Encephalitis

Recommended for travelers whoAre moving to an area with Japanese encephalitis to liveSpend long periods of time, such as a month or more, in areas with Japanese encephalitisFrequently travel to areas with Japanese encephalitisConsider vaccination for travelersSpending less than a month in areas with Japanese encephalitis but will be doing activities that increase risk of infection, such as visiting rural areas, hiking or camping, or staying in places without air conditioning, screens, or bed netsGoing to areas with Japanese encephalitis who are uncertain of their activities or how long they will be thereNot recommended for travelers planning short-term travel to urban areas or travel to areas with no clear Japanese encephalitis season.

+5 more

Source: CDC Travelers' Health

View Complete Health Guide

Is September a Good Time to Visit Kathmandu?

👌Decent conditions for most activities(57/100)

Short Answer

Kathmandu during September means embracing the rain (83%, 9mm typical). Some activities may be affected, but the lush landscapes and fewer tourists can be rewarding.

Decision Factors

High rainfall period

83% rain probability, 9mm average

Vaccinations required

Yellow Fever

Seismically active region

8 earthquakes recorded in this month (30-year data)

Poor air quality: Unhealthy

Unhealthy. Everyone should reduce outdoor activities.

Very high humidity

87% average humidity

Peak tourist season

100% of annual peak - expect crowds and peak prices

Good For

💼
Business travelers
Climate-controlled meetings unaffected by weather

Who Should Avoid

💰
Budget travelers
Peak season means premium prices everywhere
👴
Elderly travelers
87% humidity creates difficult conditions
🥾
Outdoor enthusiasts
83% rain probability disrupts outdoor activities
📸
Photographers
75% cloud cover limits natural light opportunities

"According to 30YearWeather's analysis of 30 years of NASA POWER satellite data,Kathmandu in September averages 25°C with 83% precipitation probability."

📊 Source: 30YearWeather.com🛰️ Data: NASA POWER (1991-2021)View Methodology →

Frequently Asked Questions: Kathmandu in September

What are the temperatures in Kathmandu in September?

Daytime highs average 25°C, nights drop to 18°C. Temperatures remain fairly consistent.

How many rainy days in Kathmandu in September?

Expect around 30 days with measurable rainfall. Definitely pack rain gear.

What to wear in Kathmandu in September?

Comfortable casual wear with a light jacket for evenings.

Is September peak season in Kathmandu?

This is off-peak season. Expect lower prices and fewer crowds.

Kathmandu Weather in September

Kathmandu September Weather Calendar