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
The shift into September records an average high-temperature of a still warm 25.7°C (78.3°F), subtly varied from August's 27.6°C (81.7°F). Caldelas experiences a dramatic descent in temperature during September, with the average nighttime reading settling at a refreshing 13.4°C (56.1°F).Humidity
In September, the average relative humidity is 66%.Rainfall
In Caldelas, during September, the rain falls for 7.5 days and regularly aggregates up to 31mm (1.22") of precipitation. Throughout the year, there are 150 rainfall days, and 997mm (39.25") of precipitation is accumulated.Daylight
In September, the average length of the day in Caldelas is 12h and 28min.On the first day of September in Caldelas, sunrise is at 07:00 and sunset at 20:06. On the last day of the month, sunrise is at 07:29 and sunset at 19:16 WEST.
Sunshine
The average sunshine in September is 9.1h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: A maximum high daily UV index of 5 during September translates into the following directions:
Heed the precautions - Suggestions to avoid sunburn are made. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Caldelas?
What is the average humidity in September in Caldelas?
How many days does it rain in September in Caldelas?
What is the average length of the day in September in Caldelas?
When is the sunrise / sunset in September in Caldelas?
How long on average sun shines in September in Caldelas?
What is the UV index intensity in September in Caldelas?
Average temperature in September
Caldelas, Portugal
- Average high temperature in September: 25.7°C
The warmest month (with the highest average high temperature) is August (27.6°C).
The month with the lowest average high temperature is January (11.8°C).
- Average low temperature in September: 13.4°C
The month with the highest average low temperature is August (14.4°C).
The coldest month (with the lowest average low temperature) is February (4.7°C).
Average pressure in September
Caldelas, Portugal
- Average pressure in September: 1017.6mbar
The month with the highest atmospheric pressure is December (1022.4mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).
Average wind speed in September
Caldelas, Portugal
- Average wind speed in September: 6.6km/h
The windiest months (with the highest average wind speed) are February and March (8.2km/h).
The calmest month (with the lowest average wind speed) is September (6.6km/h).
Average humidity in September
Caldelas, Portugal
- Average humidity in September: 66%
The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (65%).
Average rainfall in September
Caldelas, Portugal
- Average rainfall in September: 31mm
The wettest month (with the highest rainfall) is November (146mm).
The driest month (with the least rainfall) is July (12mm).
Average rainfall days in September
Caldelas, Portugal
- Average rainfall days in September: 7.5 days
The month with the highest number of rainy days is January (17.3 days).
The month with the least rainy days is August (5.4 days).
Average daylight in September /
Average sunshine in September
Caldelas, Portugal
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in September
Caldelas, Portugal
- Average sunshine days in September: 20.8 days
The month with the most sunshine days is August (23.8 days).
The month with the least sunshine days is April (10.5 days).
Average UV index in September
Caldelas, 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, March, April, November and December (UV index 3).
Average cloud cover in September
Caldelas, Portugal
- Average cloud cover in September: 25
The month with the most cloud cover is January (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 23).
Average visibility in September
Caldelas, Portugal
- Average visibility in September: 9km
The month with the highest visibility is September (9km).
The month with the lowest visibility is January (7km).
