September is the start of the official peak (best) trekking season in Nepal.
However, it's important to realize that it's also the end of monsoon season which can continue on into mid September. Heavy monsoon rains along with thunderstorms can linger on as the weather cools down to pleasant temperatures for trekking.
For those that take the chance at trekking early September there is a chance that your could get open trails with few other trekkers and beautiful views. It's a 70/30 chance in my estimation of rain in early September.
For the most part at 2,000m expect day time temperatures of 24+ degrees and temperatures at night around 11 degrees.
September trekking tips
- Try to plan your trek from mid-september onwards
- Bring light rain gear just in case
In early September it's best to avoid remote treks in far west or east Nepal. There's still flooding in these areas and the roads are not considered safe. From mid-September the monsoons should have passed and the trekking season begins in earnest. All treks are now possible from the all-time popular treks like Everest Base Camp and Annapurna Circuit to the remoter treks.
Heavy monsoon rains hang on for the first week or two in September followed by bright pleasant dry weather which announces the arrival of peak trekking season. Expect 24+ degree* weather in the mountains during the day. During the night temperatures are often around the 11 degree range*.
* weather temperatures and conditions change as you go up in altitude or descend. Likewise there are variations depending on the trek. Always expect passes and base camps to have more extreme conditions. The temperatures listed here are only used as rough indications.
Since publishing my guidebooks we've been keeping an accurate record of both GPS data for trails and the weather to try and help trekkers make decisions.
The following information is correlated based on real trekking guides and trekkers who were in the following areas. The weather data is broken down into the year of the trek, weeks in the month and a note on what a guide or person experienced in terms of weather. We've used EBC, ABC and the APC for weather examples as they cover the widest range of areas.
EBC = Everest Base Camp. ABC = Annapurna Base Camp. APC = Annapurna Circuit. WK = Week.
* Blank years or weeks just means the guide or data is/was not available. It may also mean we've not had the time to update the data here (we have a lot of data on all treks). We are trying to keep this information as accurate as possible. If you are looking for specific data you may contact us, however you can best support this site by purchasing a guidebook first.
Trek / DateEBC
WK 2: 3rd & 6th day of trek cloudy but views from Kalla Patthar great.
WK 3: cloudy and light rain.
WK3: Clear views
WK3 Cloud at Lukla
Trek / DateABC
WK 1: Cloudy.
WK 2: raining on way back.
WK 1: light rain but still okay.
WK 2 Cloud below 3,000 meters.
Trek / DateAPC
WK 1: light rain, but still good views.
WK 3: Nice view of mountains but from Jagat to Chame light rain during day and evening.
WK 4: Light snow falling at Throng La but still able to cross.
Light cloud, mountain is visible.
Cloud below 3,000 meters
This historical climate/weather data may be useful to some but do remember that that the weather can change on an hourly basis in Nepal.
A light breathable rain jacket is advisable throughout September just in case there is the odd shower or heavier rain at the start of the month. It can be warm so heavy jackets are often too much unless you are expecting to stay a long time at a base camp. Many trekkers wear shorts during the day then switch over to longer trekking trousers later in the evening. A sleeping bag liner can help with the heat in the evening but a light sleeping bag is best if tea-houses run out of blankets.
Accommodation along the trekking routes will be open in September. Rooms are rarely fully booked out at this time of year.
Just like accommodation all restaurants will be open in September.
Do read my guidebook trekking in Nepal to understand about restaurants when trekking you may not be allowed to stay in your accommodation if you eat elsewhere when trekking!
Yes, trekking permits are available year round in Nepal including September. Permits are available in both Kathmandu and Pokhara.
Trekking in Nepal during September means you'll need travel insurance. It's peaks season and the weather should be good. This is when trekkers often enjoy going that bit further, beautiful views distract and altitude sickness is ever-present
Do read about getting proper travel insurance for trekking in Nepal.
Do read my full article on when is the best time of year to go trekking in Nepal for a full overview which it makes it easy to pick the best season to go trekking. Meanwhile here's a monthly breakdown.
Again, if you are trying to make plans it'll be easier to read when is the best time of year to go trekking in Nepal first, then the monthly breakdown.
The above information should give you a brief outline and understanding about trekking in Nepal in September.
I've compiled more detailed articles on the specifics of trekking in Nepal below.
You will find them to be a great place to thoroughly research your trip to Nepal, be sure to bookmark them so you don't forget!
|You might find my following free guides helpful:|
My guide on trekking in Nepal
|Check out my guide on equipment & gear needed for trekking in Nepal|
|Check out my list of treks to do in Nepal complete with maps||Check out my guide on how to travel overland into Tibet for a lot more!|
|How to choose a trekking guide in Nepal||My Day by day account of trekking to Everest Base Camp in the off season (winter)|
|Check out my How to travel overland into Nepal guide||Check out my country Guide to Nepal|
Liked this page? You'll love my trekking book! It's a hands on trekking guidebook that's better than the rest. Yes, really!
In the book I cover all the popular treks in Nepal with step-by-step accuracy using scalable maps, photographs and travel tested up-to-date trekking information.
Just like my other guidebooks to Nepal it's an interactive & printable guidebook like no other.
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