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General
Nepal experience 4 seasons - spring (Mar-May), summer (Jun.-Aug.), autumn (Sept.-Nov.) and winter (Dec.-Feb.).
The climate is varied ranging from the sub-tropical Terai to the cool dry temperate and alpine climates in
the northern Himalayan ranges. The Terai is the hottest part of the country, summer temperature may rise as high as
40ºc and is hot and humid. In the mid mountain regions, the summer is mild with temperature around
25º-27ºc. The winter temperature range from 7ºc to 23ºc in the Terai and sub-zero to 12ºc in the
mountain regions and valleys. The northern Himalayan region has a frigid climate. The valley of Kathmandu has a pleasant
climate with an average summer temperature of 19º-27ºc and winter temperature of 2º-12ºc respectively.
The average temperature and rainfall recorded in Kathmandu are listed below:
| Month |
Min(C) |
Max(C) |
Rainfall (mm) |
| January |
2.7 |
17.5 |
47 |
| February |
2.2 |
21.6 |
11 |
| March |
6.9 |
25.5 |
15 |
| April |
8.6 |
30.0 |
5 |
| May |
15.6 |
29.7 |
146 |
| June |
18.9 |
29.4 |
135 |
| July |
19.5 |
28.1 |
327 |
| August |
6.9 |
29.5 |
206 |
| September |
18.6 |
28.6 |
199 |
| October |
13.3 |
28.6 |
42 |
| November |
6.0 |
23.7 |
0 |
| December |
1.9 |
20.7 |
1 |
Rainfall is extensive during the south-west monsoon period from June to August with the eastern part
receiving the maximum rainfall. In the winter season, the western part receives a larger portion of rainfall. The period
from October to May is generally dry in most parts of the country. Annual rainfall varies from around 300 mm. in the
northern and western areas to over 2500 mm. in the eastern region. Kathmandu Valley receives around 1300 mm. of rainfall
annually with a heavy congestion from June to August.
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