Climate & yearly weather in Kathmandu


Monsoon season in Kathmandu
Monsoon season in Kathmandu

Kathmandu generally has a humid subtropical climate with warm days followed by the cooler mornings and night time temperatures. Like the rest of Nepal Kathmandu has a monsoon, summer, spring, autumn and winter season which varies the temperature and precipitation.

It's worth taking a note that the Kathmandu Valley protects the region from the extremes of weather other regions may have throughout the year. This includes the harsh heat to the south and the freezing mountain temperatures to the north. Indeed it rarely snows in Kathmandu.

Weather data for Kathmandu
Month Jan Feb Mar Apr May Jun
Average high °C (°F) 18.0
(64.4)
20.2
(68.4)
24.3
(75.7)
27.4
(81.3)
28.2
(82.8)
28.3
(82.9)
Average low °C (°F) 2.1
(35.8)
3.8
(38.8)
7.5
(45.5)
11.3
(52.3)
15.5
(59.9)
19.0
(66.2)
Precipitation mm (inches) 14.2
(0.559)
16.7
(0.657)
31.2
(1.228)
54.4
(2.142)
114.2
(4.496)
256.4
(10.094)
Avg. rainy days 2 3 4 6 12 17
Metrological data from World Meteorological Organization
Weather data for Kathmandu
Month Jul Aug Sept Oct Nov Dec
Average high °C (°F) 27.7
(81.9)
28.0
(82.4)
27.2
(81.0)
25.8
(78.4)
22.7
(72.9)
19.4
(66.9)
Average low °C (°F) 20.0
(68.0)
19.7
(67.5)
18.2
(64.8)
13.0
(55.4) )
7.4
(45.3)
3.0
(37.4)
Precipitation mm (inches) 359.6
(14.157)
314.2
(12.37)
183.1
(7.209)
59.4
(2.339)
7.5
(0.295)
14.2
(0.559)
Avg. rainy days 23 22 15 4 1 1

From the above data you can clearly see the wettest, driest and hottest and coldest months.


When is the best weather for flights to view Everest?


Generally speaking Everest viewing flights occur all year around and leave from Kathmandu airport. However there are no guarantees that you will see Everest due to weather conditions. Due to it's location the weather surrounding Everest is often volatile and changes hourly.

However the local airlines that arrange the flights will cancel a flight is the weather is obviously too cloudy that morning.

On average Everest flights are taken first thing in the morning. The earlier (or first flights) offer the best chance at clear weather.

The best months for Everest flights are the low precipitation months shown above - Nov, Dev, Jan, Feb.

Do read my full guide on how to take an Everest mountain flight from Kathmandu


When is the best weather for trekking in Nepal from Kathmandu?


Treks departing from Kathmandu are no different weather wise than any other part of Nepal aside from localized condition due to weather conditions.

Peak trekking weather months are October-November-December.

Please see my guide on the best times of the year to go trekking in Nepal for more precise information.


When is the best weather to visit Kathmandu?


Kathmandu has no extreme weather seasons so possible to visit Kathmandu at anytime of the year.

However there is a winter season Nov-Mar where it can get cold, especially at night. It rarely snows in Kathmandu.

During monsoon season streets can often get clogged with rain water. Heavy downpours usually only last 1 hour.

Interestingly Pokhara has a slightly different weather climate. So do check out what the weather is like in Pokhara.

For more on Kathmandu and things to do please check my full Kathmandu city guide.


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