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
With the transition into September, Santiago do Cacém notes an average high-temperature of a still moderately hot 23.5°C (74.3°F), closely resembling August. In Santiago do Cacém, the month of September brings a consistent average low-temperature of 18.8°C (65.8°F), slightly cooler than its daytime highs.Humidity
In Santiago do Cacém, the average relative humidity in September is 73%.Rainfall
In Santiago do Cacém, in September, it is raining for 4.1 days, with typically 13mm (0.51") of accumulated precipitation. In Santiago do Cacém, during the entire year, the rain falls for 94.6 days and collects up to 327mm (12.87") of precipitation.Daylight
The average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 07:05 and sunset at 20:04. On the last day of the month, sunrise is at 07:30 and sunset at 19:19 WEST.
Sunshine
In Santiago do Cacém, the average sunshine in September is 9.5h.UV index
June through September, with an average maximum UV index of 6, are months with the highest UV index. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for average individuals.Note: The average daily UV index of 6 in September transforms into the following instructions:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Santiago do Cacém?
What is the average humidity in September in Santiago do Cacém?
How many days does it rain in September in Santiago do Cacém?
How many hours of daylight does Santiago do Cacém have in September?
What time are sunrise and sunset in September in Santiago do Cacém?
How many hours of sunshine does Santiago do Cacém have in September?
When is the highest UV index in Santiago do Cacém?
How high is the UV index in September in Santiago do Cacém?
Average temperature in September
Santiago do Cacém, Portugal
- Average high temperature in September: 23.5°C
The warmest month (with the highest average high temperature) is August (24.2°C).
The month with the lowest average high temperature is February (14.8°C).
- Average low temperature in September: 18.8°C
The months with the highest average low temperature are August and September (18.8°C).
The coldest month (with the lowest average low temperature) is February (10.8°C).
Average pressure in September
Santiago do Cacém, 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
Santiago do Cacém, Portugal
- Average wind speed in September: 15.1km/h
The windiest month (with the highest average wind speed) is February (19.4km/h).
The calmest month (with the lowest average wind speed) is September (15.1km/h).
Average humidity in September
Santiago do Cacém, Portugal
- Average humidity in September: 73%
The month with the highest relative humidity is April (76%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Santiago do Cacém, Portugal
- Average rainfall in September: 13mm
The wettest month (with the highest rainfall) is November (56mm).
The driest month (with the least rainfall) is July (1mm).
Average rainfall days in September
Santiago do Cacém, Portugal
- Average rainfall days in September: 4.1 days
The month with the highest number of rainy days is November (13.4 days).
The month with the least rainy days is August (1.1 days).
Average daylight in September /
Average sunshine in September
Santiago do Cacém, 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 36min).
- Average sunshine in September: 9h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).
Average sunshine days in September
Santiago do Cacém, Portugal
- Average sunshine days in September: 25.1 days
The month with the most sunshine days is August (29.4 days).
The month with the least sunshine days is April (15.3 days).
Average UV index in September
Santiago do Cacém, Portugal
- Average UV index in September: 6
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, April, November and December (UV index 4).
Average cloud cover in September
Santiago do Cacém, Portugal
- Average cloud cover in September: 16
The month with the most cloud cover is January (Cloud cover 37).
The month with the least cloud cover is August (Cloud cover 10).
Average visibility in September
Santiago do Cacém, 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).
