Contents
- 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 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
September
Weather in September
Temperature
September observes an average high-temperature of a still moderately hot 25.7°C (78.3°F), marking an insignificant difference from August's 27.4°C (81.3°F). September's nights in Lumiar observe an average temperature of 17.1°C (62.8°F).Humidity
The average relative humidity in September is 69%.Rainfall
In Lumiar, in September, during 5.6 rainfall days, 18mm (0.71") of precipitation is typically accumulated. Throughout the year, there are 111.8 rainfall days, and 359mm (14.13") of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 07:06 and sunset at 20:06. On the last day of September, in Lumiar, sunrise is at 07:32 and sunset at 19:20 WEST.
Sunshine
In September, the average sunshine is 9.4h.UV index
The months with the highest UV index in Lumiar are June through September, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high UV index of 6 in September translates into the following recommendations:
Ward off overexposure. Defence against solar harm is crucial. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is particularly strong, noting that parasols or canopies may not offer total sun protection. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Lumiar in September?
What is the average humidity in September in Lumiar?
How much does it rain in Lumiar in September?
What is the average length of the day in September in Lumiar?
When are sunrise and sunset in September in Lumiar?
How many hours of sunshine does Lumiar have in September?
When is the highest UV index in Lumiar?
How high is the UV index in September in Lumiar?
Average temperature in September
Lumiar, Portugal
- Average high temperature in September: 25.7°C
The warmest month (with the highest average high temperature) is August (27.4°C).
The month with the lowest average high temperature is January (14.8°C).
- Average low temperature in September: 17.1°C
The month with the highest average low temperature is August (17.6°C).
The coldest month (with the lowest average low temperature) is February (9.4°C).
Average pressure in September
Lumiar, Portugal
- Average pressure in September: 1016.9mbar
The month with the highest atmospheric pressure is December (1022.6mbar).
The month with the lowest atmospheric pressure is April (1015.7mbar).
Average wind speed in September
Lumiar, Portugal
- Average wind speed in September: 12.9km/h
The windiest months (with the highest average wind speed) are February and July (15.9km/h).
The calmest months (with the lowest average wind speed) are September and October (12.9km/h).
Average humidity in September
Lumiar, Portugal
- Average humidity in September: 69%
The month with the highest relative humidity is January (77%).
The month with the lowest relative humidity is August (68%).
Average rainfall in September
Lumiar, Portugal
- Average rainfall in September: 18mm
The wettest month (with the highest rainfall) is November (61mm).
The driest month (with the least rainfall) is July (3mm).
Average rainfall days in September
Lumiar, Portugal
- Average rainfall days in September: 5.6 days
The month with the highest number of rainy days is November (14.1 days).
The month with the least rainy days is August (2.3 days).
Average daylight in September /
Average sunshine in September
Lumiar, Portugal
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 18min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in September
Lumiar, Portugal
- Average sunshine days in September: 23 days
The month with the most sunshine days is August (26.4 days).
The months with the least sunshine days are April and November (14.5 days).
Average UV index in September
Lumiar, Portugal
- Average UV index in September: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The month with the lowest UV index is December (UV index 3).
Average cloud cover in September
Lumiar, Portugal
- Average cloud cover in September: 17
The month with the most cloud cover is January (Cloud cover 40).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in September
Lumiar, Portugal
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
