Geneva
Switzerland
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Geneva, Switzerland

The Leman Lake, flowing through the city of Geneva, Switzerland, in a stunning aerial panorama of the cityscape and the distant mountains
The Leman Lake, flowing through the city of Geneva, Switzerland, in a stunning aerial panorama of the cityscape and the distant mountains
September, the first month of the autumn, in Geneva, is also an agreeable month, with average temperature varying between 10.8°C (51.4°F) and 20.9°C (69.6°F).

Temperature

In September, the average high-temperature slightly decreases, from a warm 25.8°C (78.4°F) in August, to an agreeable 20.9°C (69.6°F). The average low-temperature, in Geneva, is 10.8°C (51.4°F).

Humidity

In September, the average relative humidity in Geneva is 73%.

Rainfall

In Geneva, during September, the rain falls for 8.1 days and regularly aggregates up to 100mm (3.9") of precipitation. In Geneva, during the entire year, the rain falls for 109 days and collects up to 1006mm (39.6") of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

In Geneva, the average length of the day is 12.5h.

Sunshine

The average sunshine in September is 6.2h.

UV index

The average daily maximum UV index in Geneva, Switzerland, is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV rays for average individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Geneva?

In Geneva, in September, the average high-temperature is 20.9°C (69.6°F), and the average low-temperature is 10.8°C (51.4°F).

What is the average humidity in September in Geneva?

In Geneva, the average relative humidity in September is 73%.

How much does it rain in Geneva in September?

In Geneva, in September, it is raining for 8.1 days, with typically 100mm (3.9") of accumulated precipitation.

When it does not snow in Geneva?

May through October are months without snowfall in Geneva, Switzerland.

How many hours of daylight does Geneva have in September?

In Geneva, Switzerland, the average length of the day in September is 12.5h.

How long on average sun shines in September in Geneva?

The average sunshine in September in Geneva, Switzerland, is 6.2h.

What is the UV index reading in September in Geneva?

In Geneva, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV radiation.
Average temperature in September - Geneva, Switzerland
  • Average high temperature in September: 20.9°C

The warmest month (with the highest average high temperature) is July (26.5°C).
The month with the lowest average high temperature is January (4.5°C).

  • Average low temperature in September: 10.8°C

The month with the highest average low temperature is July (14.4°C).
The coldest month (with the lowest average low temperature) is January (-1.3°C).

Average humidity in September - Geneva, Switzerland
  • Average humidity in September: 73%

Months with the highest relative humidity are January, November and December (81%).
The month with the lowest relative humidity is July (64%).

Average rainfall in September - Geneva, Switzerland
  • Average rainfall in September: 100mm

The wettest month (with the highest rainfall) is October (105mm).
The driest month (with the lowest rainfall) is February (68mm).

Average rainfall days in September - Geneva, Switzerland
  • Average rainfall days in September: 8.1 days

The month with the highest number of rainy days is May (10.6 days).
The month with the lowest number of rainy days is July (7.6 days).

Average snowfall in September - Geneva, Switzerland
  • Average snowfall in September: 0mm

The month with the highest snowfall is January (108mm).
Months with the lowest snowfall are May, June, July, August, September and October (0mm).

Average snowfall days in September - Geneva, Switzerland
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (2.5 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September / Average sunshine in September - Geneva, Switzerland
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.7h).
The month with shortest days is December (Average daylight: 8.7h).

  • Average sunshine in September: 6.2h

The month with most sunshine is July (Average sunshine: 8.5h).
The month with least sunshine is December (Average sunshine: 1.6h).

Average UV index in September - Geneva, Switzerland
  • Average UV index in September: 5

Months with the highest UV index are June and July (UV index 8).
Months with the lowest UV index are January, November and December (UV index 1).