The weather and climate in Nepal play a large part in affecting when visitors come to Nepal and it is useful to understand the seasonal variations so that visitors can choose to visit at the optimum time for the activites they wish to do.  

The Nepali Seasons 

The weather in Nepal is reasonably stable and the climate naturally forms 4 main seasons.

Winter (December, January, Febuary) 

The Nepali Winter sees predominately high pressure bringing clear skies and dry weather. The temperatures are warm in the day but as the sun sets the temperature falls quickly and nights are often very cold. 

Pre-Monsoon (March, April, May, Mid-June)

During the Pre monsoon you can expect more variable weather but with predomininantly clear mornings and overcast afternoons. Both the days and nights will be warm and the temperature will gradually increase as the season progresses. Thunderstorms are quite common at this time of year and are sometimes combined with short bursts of heavy rain or hailstones.

Monsoon (Mid-June, July, August, Mid-September) 

The Monsoon season dominates Nepali climate and is a period of low pressure which brings frequent rain showers and storms. The majority of the rain falls in the afternoon and night-time but there are also occasional days of continuous rain. During this season the temperature and humidity is very high during both the night and day. 

Post-Monsoon (Mid-September, October, November) 

The Post Monsoon Season brings a return to stable high pressure giving mainly clear skies, sunshine, warm days and cool nights.

 

The Best Season to Visit 

Each of Nepal's climatic seasons offer something different and visitors do come to Nepal all the year round. However, the weather that suits most people is during the Pre and Post Monsoon seasons. It is at this time that the majority of vistors come to Nepal.

These two main tourist seasons (Pre-Monsoon, March, April, May, Mid June and the post-Monsoon, Mid-September, October, November). Both tend to be fairly dry, and to provide pleasant conditions for trekking, rafting and sightseeing. During the Pre-monsoon visitors will have the benefit of flowering plants, but visibility is sometimes reduced with hazy conditions. Post-monsoon normally provides good visibility.

Trekking 

For trekking below 4000m, the day time temperatures in these seasons will normally allow visitors to be comfortable in a t-shirt and light sweater. Above 4000m a fleece jacket may also be needed. At altitudes above 3000-3500m, night time temperatures will be low (often down to around freezing), but a down jacket or staying tucked up comfortably in a warm tent or lodge will be enough to stay comfortable.

Trekking is still possible outside the main seasons and during the monsoon months (mid-June, July, August, mid-September) the rain-shadow areas of the upper Marsyandi and Kali Gandaki valleys, and Dolpo receive far less rain than the Khumbu or Annapurna areas. During the winter conditions can also be good although much colder, but be aware that on occasions in January, February and March the higher passes and valleys are sometimes unreachable owing to snow fall.

Rafting

Rafting is possible throughout the year in Nepal. Seasonal variations in temperature and rainfall affect the water levels in the rivers and determine which rivers are best run at any one time. Optimum seasons for running each river will be advertised by good operators on their websites. See the Things to Do section of Tripadvisor for listed companies.

 

Climate Figures for selected locations


Normal (Average) Maximum, Minimum Temperature (°C) and Rainfall (mm) through year

Months

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Annual

Monsoon

Period

JIRI

Max temp (°C)

13

 

15

 

19

 

22

 

23

 

24

 

23

 

23

 

22

 

21

 

17

 

15

 

19.9

 

 

1971-2000

Min Temp (°C)

1

1

 

3

 

7

11

15

17

17

15

10

4

0

8.3

 

Rainfall (mm)

16

19

43

84

179

374

590

560

289

73

17

15

2,232

1,791

 

 

JOMSOM

Max temp (°C)

10

 10

 15

 18

 22

 23

 23

 23

 21

 18

 14

 12

 17.6

 

1981-2000

 

Min Temp (°C)

-2.7

 

-2

 

1

 

4

 

7

 

11

 

13

 

13

 

11

 

6

 

1

 

-2

 

5.3

 

 

 

Rainfall (mm)

 7.9

 10.2

 23.8

 18.1

 16.9

 23.9

 40.0

 34.6

 36.9

 30.2

 8.9

 6.3

 253.1

 133.0

1973-2000

 

KATHMANDU AIRPORT

Max temp (°C)

18

 

20

24

27

28

28

28

28

27

26

22

19

24.8

 

1971-2000

 

Min Temp (°C)

2

 

3

 

7

 

11

 

16

 

19

 

20

 

19

 

18

 

13

 

7

 

3

 

11.7

 

 

 

Rainfall (mm)

13

 

17

 

30

 

56

 

116

 

262

 

356

 

319

 

186

 

56

 

8

 

15

 

1,439

 

1,125

 

 

 

 

NAGARKOT

Max temp (°C)

12

 

14

 

18

 

22

 

23

 

23

 

22

 

22

 

21

 

20

 

17

 

13

 

19.4

 

 

 

1977-2000

 

Min Temp (°C)

2

 

3

 

7

 

10

 

12

 

14

 

15

 

15

 

14

 

11

 

7

 

4

 

9.9

 

 

 

Rainfall (mm)

15

 

17

 

29

 

55

 

139

 

343

 

476

 

475

 

263

 

75

 

10

 

12

 

1,921

 

1,554

 

1971-2000

 

 

NAMCHE BAZAR

Max temp (°C)

7

 

6

 

9

 

12

 

14

 

15

 

16

 

16

 

15

 

12

 

9

 

7

 

11.5

 

 

 

1996-2005

 

Min Temp (°C)

-8

 

-6

 

-3

 

1

 

4

 

6

 

8

 

8

 

6

 

2

 

-3

 

-6

 

 

 

 

 

Rainfall (mm)

26

 

23

 

34

 

26

 

41

 

140

 

243

 

243

 

165

 

78

 

9

 

39

 

1,147

 

791

 

 

 

 

POKHARA AIRPORT

Max temp (°C)

19

 

21

 

26

 

29

 

30

 

30

 

30

 

30

 

29

 

27

 

24

 

20

 

26.2

 

 

 

1971-2000

 

Min Temp (°C)

7

 

9

 

12

 

15

 

18

 

20

 

21

 

21

 

20

 

16

 

11

 

8

 

15.2

 

 

 

Rainfall (mm)

22

 

32

 

59

 

121

 

369

 

699

 

940

 

849

 

637

 

174

 

20

 

24

 

3,951

 

3,126

 

 

 

Bear in mind that these temperature figures are 'Shade Temperatures' - sunny day times will be warmer. Remember also that temperature will decrease with altitude, at a rate of around 1 degree per hundred metres higher.

It can be useful for all travellers to take a look at Meteorological Forecasting Division of Goverment of Nepal here: http://www.mfd.gov.np/  to check the weather before travel.

These two links are very usefull to trekkers. The first one is a live web cam from the top of Kala Patthar, so you can see how is the weather like every minutes:

http://www.evk2cnr.org/WebCams/Pyrami...

The second gives you the temperature, the umidity, the wind, the pressure:

http://share-everest.it/SHAREEverest2...