September weather forecastMeritxell, Andorra
September
Weather in September
September signifies the beginning of autumn in Meritxell, Andorra. The temperatures start to cool down, with September experiencing a maximum temperature of 16.5°C (61.7°F). As the summer weather fades, the city begins to show its first hints of autumn hues. Proceeding into the following month, the downward temperature trend and change of seasons start becoming more apparent.Temperature
The shift from August to September coincides with a small decrease in the average high-temperature, down to a comfortable 16.5°C (61.7°F) from an agreeable 20.6°C (69.1°F). The average low-temperature during September nights is a chilly 6.3°C (43.3°F).Humidity
In Meritxell, Andorra, the average relative humidity in September is 75%.Rainfall
In Meritxell, in September, during 3.5 rainfall days, 6mm (0.24") of precipitation is typically accumulated. Throughout the year, in Meritxell, Andorra, there are 65.4 rainfall days, and 158mm (6.22") of precipitation is accumulated.Snowfall
January through June, August through December are months with snowfall. In Meritxell, Andorra, in September, during 0.2 snowfall days, 11mm (0.43") of snow is typically accumulated. In Meritxell, during the entire year, snow falls for 60.4 days and aggregates up to 490mm (19.29") of snow.Daylight
The average length of the day in September is 12h and 29min.On the first day of September in Meritxell, Andorra, sunrise is at 07:19 and sunset at 20:27. On the last day of the month, sunrise is at 07:50 and sunset at 19:36 CEST.
Sunshine
In Meritxell, Andorra, the average sunshine in September is 9.1h.UV index
The average daily maximum UV index in September in Meritxell, Andorra, is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: In September, a regular UV index of 3 translates into these guidelines:
Take precautions - Protection against sunburn is recommended. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. To cut down UV radiation exposure by about half, sport a wide-brim hat. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Meritxell, Andorra
- Average high temperature in September: 16.5°C
The warmest month (with the highest average high temperature) is July (20.8°C).
The months with the lowest average high temperature are January and February (1.8°C).
- Average low temperature in September: 6.3°C
The month with the highest average low temperature is August (9.8°C).
The coldest month (with the lowest average low temperature) is February (-5.8°C).
Average pressure in September
Meritxell, Andorra
- Average pressure in September: 1017.8mbar
The month with the highest atmospheric pressure is December (1021.3mbar).
The month with the lowest atmospheric pressure is April (1015mbar).
Average wind speed in September
Meritxell, Andorra
- Average wind speed in September: 6.3km/h
The windiest month (with the highest average wind speed) is February (10km/h).
The calmest month (with the lowest average wind speed) is August (6km/h).
Average humidity in September
Meritxell, Andorra
- Average humidity in September: 75%
The months with the highest relative humidity are February and March (83%).
The months with the lowest relative humidity are July and August (71%).
Average rainfall in September
Meritxell, Andorra
- Average rainfall in September: 6mm
The wettest month (with the highest rainfall) is October (25mm).
The driest month (with the least rainfall) is February (5mm).
Average rainfall days in September
Meritxell, Andorra
- Average rainfall days in September: 3.5 days
The month with the highest number of rainy days is April (7.1 days).
The month with the least rainy days is September (3.5 days).
Average snowfall in September
Meritxell, Andorra
- Average snowfall in September: 11mm
The month with the highest snowfall is March (86mm).
The month with the least snowfall is July (0mm).
Average snowfall days in September
Meritxell, Andorra
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is January (10.4 days).
The month with the least snowfall days is July (0 days).
Average daylight in September /
Average sunshine in September
Meritxell, Andorra
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 9h and 6min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is January (Average sunshine: 6h and 6min).
Average sunshine days in September
Meritxell, Andorra
- Average sunshine days in September: 26.1 days
The month with the most sunshine days is September (26.1 days).
The month with the least sunshine days is February (18.9 days).
Average UV index in September
Meritxell, Andorra
- Average UV index in September: 3
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).
Average cloud cover in September
Meritxell, Andorra
- Average cloud cover in September: 30
The month with the most cloud cover is April (Cloud cover 46).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in September
Meritxell, Andorra
- Average visibility in September: 9km
The months with the highest visibility are February, June, July, August, September, October and December (9km).
The months with the lowest visibility are January, March, April, May and November (8km).
