September weather - Autumn 2024

Weather in September
Frequently asked questions
Average temperature in September
Average pressure in September
Average wind speed in September
Average humidity in September
Average rainfall in September
Average rainfall days in September
Average snowfall in September
Average snowfall days in September
Average daylight in September
Average sunshine in September
Average sunshine days in September
Average UV index in September
Average cloud cover in September
Average visibility in September

The valley village of Lukla, Nepal, overlooking the beautiful Himalayas, viewed from Khumbu Valley

Weather in September

Cruising into autumn, Lukla in September embraces a palpable shift in atmosphere as subtle hints of chill replace summer warmth. While rainfall decreases, the town now sees an escalation in snowfall, which impressively amounts to 465mm (18.31") at this time. Prepping for winter’s return, October will bring slightly cooler days, reduced rainfall and increased snowfall. The trend towards cooler temperatures begins in earnest but not at the expense of sunshine hours, allowing residents to have a fair share of daylight. Heightened humidity levels offer a slight reprieve from the incoming dry weather.

Temperature

The onset of September in Lukla brings an average high-temperature of a still chilly 6.7°C (44.1°F), nearly matching the August temperature. Lukla observes an average low-temperature of 1.5°C (34.7°F) during September.

Humidity

The average relative humidity in September is 87%.

Rainfall

In Lukla, in September, it is raining for 23.2 days, with typically 159mm (6.26") of accumulated precipitation. Throughout the year, in Lukla, there are 142.5 rainfall days, and 1206mm (47.48") of precipitation is accumulated.

Snowfall

January through December are months with snowfall in Lukla. In September, in Lukla, Nepal, it is snowing for 17.3 days. Throughout September, 465mm (18.31") of snow is accumulated. Throughout the year, in Lukla, there are 164.6 snowfall days, and 3156mm (124.25") of snow is accumulated.

Daylight

In September, the average length of the day is 12h and 19min.
On the first day of the month, sunrise is at 5:37 am and sunset at 6:18 pm. On the last day of September, sunrise is at 5:50 am and sunset at 5:45 pm +0545.

Sunshine

In September, the average sunshine in Lukla is 7.4h.

UV index

January through April, June through December, with an average maximum UV index of 2, are months with the highest UV index. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the average person.
Note: The maximum daily UV index, 2 in September, converts into the following recommendations:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Stay sun-safe with clothing that is both closely woven and worn loosely. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.

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Frequently asked questions

Is it cold in Lukla during September?

In September, in Lukla, the average high-temperature is 6.7°C (44.1°F), and the average low-temperature is 1.5°C (34.7°F).

What is the average humidity in September in Lukla?

The average relative humidity in September in Lukla is 87%.

How much does it rain in Lukla in September?

In Lukla, in September, it is raining for 23.2 days, with typically 159mm (6.26") of accumulated precipitation.

How many days does it snow in September in Lukla?

In September, it is snowing for 17.3 days. Throughout September, 465mm (18.31") of snow is accumulated.

What is the average length of the day in September in Lukla?

In Lukla, the average day length in September is 12h and 19min.

What time are sunrise and sunset in September in Lukla?

On the first day of September, sunrise is at 5:37 am and sunset at 6:18 pm. On the last day of the month, sunrise is at 5:50 am and sunset at 5:45 pm +0545.

How long on average sun shines in September in Lukla?

In Lukla, Nepal, the average sunshine duration in September is 7.4h.

What is the month with the highest UV index in Lukla?

The months with the highest UV index in Lukla are January through April, June through December, with an average maximum UV index of 2.

What is the UV index reading in September in Lukla?

In Lukla, Nepal, the average daily maximum UV index in September is 2. A UV Index value of 2, and less, symbolizes a low health threat from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

8°C 46.4°F

6.7°C 44.1°F

3.4°C 38.1°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

7.5km/h 4.7mph

8km/h 5mph

9km/h 5.6mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

0.2

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Lukla, Nepal

Average high temperature in September: 6.7°C

The warmest month (with the highest average high temperature) is July (8.3°C).
The month with the lowest average high temperature is January (-3.9°C).

Average low temperature in September: 1.5°C

The month with the highest average low temperature is July (5°C).
The coldest month (with the lowest average low temperature) is January (-14.7°C).

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Average pressure in September
Lukla, Nepal

Average pressure in September: 1011.3mbar

The month with the highest atmospheric pressure is January (1017.6mbar).
The month with the lowest atmospheric pressure is July (1006.3mbar).

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Average wind speed in September
Lukla, Nepal

Average wind speed in September: 6.9km/h

The windiest month (with the highest average wind speed) is February (11km/h).
The calmest month (with the lowest average wind speed) is August (6.6km/h).

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Average humidity in September
Lukla, Nepal

Average humidity in September: 87%

The month with the highest relative humidity is July (92%).
The month with the lowest relative humidity is December (41%).

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Average rainfall in September
Lukla, Nepal

Average rainfall in September: 159mm

The wettest month (with the highest rainfall) is July (312mm).
The driest month (with the least rainfall) is November (8mm).

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Average rainfall days in September
Lukla, Nepal

Average rainfall days in September: 23.2 days

The month with the highest number of rainy days is August (31 days).
The month with the least rainy days is December (1.3 days).

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Average snowfall in September
Lukla, Nepal

Average snowfall in September: 465mm

The month with the highest snowfall is May (614mm).
The month with the least snowfall is November (51mm).

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Average snowfall days in September
Lukla, Nepal

Average snowfall days in September: 17.3 days

The month with the highest number of snowfall days is May (24.4 days).
The month with the least snowfall days is December (3.7 days).

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Average daylight in September /
Average sunshine in September
Lukla, Nepal

Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 13h and 54min).
The month with the shortest days is December (Average daylight: 10h and 24min).

Average sunshine in September: 7h and 2min

The month with the most sunshine is April (Average sunshine: 10h and 54min).
The month with the least sunshine is July (Average sunshine: 5h and 12min).

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Average sunshine days in September
Lukla, Nepal

Average sunshine days in September: 0.2 days

The month with the most sunshine days is December (26.4 days).
The months with the least sunshine days are July and August (0 days).

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Average UV index in September
Lukla, Nepal

Average UV index in September: 2

The months with the highest UV index are January, February, March, April, June, July, August, September, October, November and December (UV index 2).
The month with the lowest UV index is May (UV index 1).

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Average cloud cover in September
Lukla, Nepal

Average cloud cover in September: 49

The month with the most cloud cover is July (Cloud cover 71).
The month with the least cloud cover is December (Cloud cover 7).

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Average visibility in September
Lukla, Nepal

Average visibility in September: 8km

The months with the highest visibility are January, February and December (10km).
The months with the lowest visibility are July and August (7km).

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September weather forecast
Lukla, Nepal

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