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 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
September
Weather in September
Temperature
The arrival of September corresponds with a light shift in temperature, down from 29.2°C (84.6°F) in August to a still moderately hot 25.3°C (77.5°F). During September, Forninhos detects a significant contrast from its daytime temperatures, with nights averaging at a fresh 12.4°C (54.3°F).Humidity
In Forninhos, the average relative humidity in September is 55%.Rainfall
In Forninhos, in September, it is raining for 5.9 days, with typically 19mm (0.75") of accumulated precipitation. Throughout the year, there are 113.4 rainfall days, and 421mm (16.57") of precipitation is accumulated.Snowfall
In Forninhos, Portugal, snow does not fall in May through October.Daylight
In September, the average length of the day is 12h and 28min.On the first day of the month, sunrise is at 06:57 and sunset at 20:02. On the last day of September, sunrise is at 07:26 and sunset at 19:13 WEST.
Sunshine
In September, the average sunshine is 9.5h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: In September, the average maximum UV index of 5 translates into the following recommendations:
Take precautions - Protection against sun damage is advised. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September in Forninhos?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Forninhos have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Forninhos, Portugal
- Average high temperature in September: 25.3°C
The warmest month (with the highest average high temperature) is August (29.2°C).
The month with the lowest average high temperature is January (8.7°C).
- Average low temperature in September: 12.4°C
The month with the highest average low temperature is July (14.2°C).
The coldest month (with the lowest average low temperature) is February (1.8°C).
Average pressure in September
Forninhos, Portugal
- Average pressure in September: 1016.8mbar
The month with the highest atmospheric pressure is December (1023.1mbar).
The month with the lowest atmospheric pressure is April (1015.2mbar).
Average wind speed in September
Forninhos, Portugal
- Average wind speed in September: 9.1km/h
The windiest month (with the highest average wind speed) is February (12.7km/h).
The calmest month (with the lowest average wind speed) is September (9.1km/h).
Average humidity in September
Forninhos, Portugal
- Average humidity in September: 55%
The month with the highest relative humidity is January (85%).
The month with the lowest relative humidity is August (50%).
Average rainfall in September
Forninhos, Portugal
- Average rainfall in September: 19mm
The wettest month (with the highest rainfall) is December (65mm).
The driest month (with the least rainfall) is August (6mm).
Average rainfall days in September
Forninhos, Portugal
- Average rainfall days in September: 5.9 days
The month with the highest number of rainy days is April (16.2 days).
The month with the least rainy days is August (2.7 days).
Average snowfall in September
Forninhos, Portugal
- Average snowfall in September: 0mm
The months with the highest snowfall are January and February (44mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Forninhos, Portugal
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.9 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Forninhos, Portugal
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 3min
The months with the most sunshine are July and August (Average sunshine: 11h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Forninhos, Portugal
- Average sunshine days in September: 22.7 days
The month with the most sunshine days is August (27.1 days).
The month with the least sunshine days is April (12.5 days).
Average UV index in September
Forninhos, Portugal
- Average UV index in September: 5
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Forninhos, Portugal
- Average cloud cover in September: 20
The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 12).
Average visibility in September
Forninhos, Portugal
- Average visibility in September: 10km
The months with the highest visibility are July, August and September (10km).
The months with the lowest visibility are January, February, April, November and December (8km).
