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 sea temperature 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 advent of September sees the average high-temperature at a still moderately hot 23.8°C (74.8°F), subtly shifted from August's 24.8°C (76.6°F). In September, in Ericeira, the average low-temperature is a refreshing 17.5°C (63.5°F).Humidity
The months with the lowest humidity in Ericeira are May, September and October, with an average relative humidity of 73%.Rainfall
In Ericeira, during September, the rain falls for 6.2 days and regularly aggregates up to 18mm (0.71") of precipitation. In Ericeira, during the entire year, the rain falls for 118 days and collects up to 403mm (15.87") of precipitation.Sea temperature
September is the month with the warmest seawater in Ericeira, with an average sea temperature of 19.9°C (67.8°F).Note: For most individuals, swimming in 19.9°C (67.8°F) is not a pleasurable activity. Breathing becomes progressively more difficult as water temperature declines below 21°C (69.8°F).
Daylight
The average length of the day in September in Ericeira, Portugal, is 12h and 26min.On the first day of September, sunrise is at 07:06 and sunset at 20:07. On the last day of the month, sunrise is at 07:33 and sunset at 19:21 WEST.
Sunshine
The average sunshine in September in Ericeira is 9.4h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: The maximum UV index of 5 during September translates into these guidelines:
Undertake protective steps - Preventing sun damage is advised. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Ericeira?
What are the least humid months in Ericeira?
What is the average humidity in September in Ericeira?
How many days does it rain in September in Ericeira?
When is the sea warmest in Ericeira?
What is the sea temperature in September in Ericeira?
What is the average length of the day in September in Ericeira?
What time are sunrise and sunset in September in Ericeira?
How many hours of sunshine does Ericeira have in September?
What is the UV index intensity in September in Ericeira?
Average temperature in September
Ericeira, Portugal
- Average high temperature in September: 23.8°C
The warmest month (with the highest average high temperature) is August (24.8°C).
The month with the lowest average high temperature is January (14.5°C).
- Average low temperature in September: 17.5°C
The month with the highest average low temperature is July (17.8°C).
The coldest month (with the lowest average low temperature) is February (10°C).
Average pressure in September
Ericeira, Portugal
- Average pressure in September: 1017mbar
The month with the highest atmospheric pressure is December (1022.5mbar).
The month with the lowest atmospheric pressure is April (1015.7mbar).
Average wind speed in September
Ericeira, Portugal
- Average wind speed in September: 15.1km/h
The windiest month (with the highest average wind speed) is February (18.7km/h).
The calmest month (with the lowest average wind speed) is October (15km/h).
Average humidity in September
Ericeira, Portugal
- Average humidity in September: 73%
The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are May, September and October (73%).
Average rainfall in September
Ericeira, Portugal
- Average rainfall in September: 18mm
The wettest month (with the highest rainfall) is November (75mm).
The driest month (with the least rainfall) is July (3mm).
Average rainfall days in September
Ericeira, Portugal
- Average rainfall days in September: 6.2 days
The month with the highest number of rainy days is November (14.6 days).
The month with the least rainy days is August (2.6 days).
Average sea temperature in September
Ericeira, Portugal
- Average sea temperature in September: 19.9°C
The best month for swimming (with the highest average sea temperature) is September (19.9°C).
The coldest month (with the lowest average sea temperature) is March (15.1°C).
Average daylight in September /
Average sunshine in September
Ericeira, Portugal
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
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 12min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in September
Ericeira, Portugal
- Average sunshine days in September: 22.5 days
The month with the most sunshine days is July (26.4 days).
The month with the least sunshine days is November (12.8 days).
Average UV index in September
Ericeira, Portugal
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover in September
Ericeira, Portugal
- Average cloud cover in September: 18
The month with the most cloud cover is January (Cloud cover 42).
The month with the least cloud cover is August (Cloud cover 17).
Average visibility in September
Ericeira, 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).
