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
With the arrival of September, Arronches experiences a modest decline in average high-temperatures, transitioning from a tropical 33.3°C (91.9°F) in August to a warm 29.4°C (84.9°F). Contrasting the daytime warmth, Arronches's September nights cool down to an average of 16.3°C (61.3°F).Heat index
September's average heat index is estimated at a tropical 30°C (86°F). Continued exposure and engagement in activity might trigger tiredness and subsequently heat cramps.Heat index data is primarily for areas with shade and subjected to light winds. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is an indicator that blends the effects of temperature and humidity to depict perceived warmth. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Humidity
In September, the average relative humidity is 48%.Rainfall
In Arronches, Portugal, in September, during 4.8 rainfall days, 8mm (0.31") of precipitation is typically accumulated. In Arronches, Portugal, during the entire year, the rain falls for 78.7 days and collects up to 219mm (8.62") of precipitation.Snowfall
April through December are months without snowfall in Arronches.Daylight
In September, the average length of the day is 12h and 26min.On the first day of September, sunrise is at 06:58 and sunset at 19:59. On the last day of the month, sunrise is at 07:24 and sunset at 19:13 WEST.
Sunshine
In Arronches, the average sunshine in September is 9.5h.UV index
In September, the average daily maximum UV index in Arronches is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 6 during September leads to these instructions:
Apply measures and align with sun safety principles. Safeguarding against skin and eye injury is pivotal. Avoid direct sunlight between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Keep in mind that shade structures may not provide complete protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Arronches during September?
What is the average humidity in September in Arronches?
How much does it rain in Arronches in September?
When it does not snow in Arronches?
How many hours of daylight does Arronches have in September?
What time are sunrise and sunset in September in Arronches?
How many hours of sunshine does Arronches have in September?
What is the UV index intensity in September in Arronches?
Average temperature in September
Arronches, Portugal
- Average high temperature in September: 29.4°C
The warmest month (with the highest average high temperature) is August (33.3°C).
The month with the lowest average high temperature is January (11.9°C).
- Average low temperature in September: 16.3°C
The month with the highest average low temperature is August (17.7°C).
The coldest month (with the lowest average low temperature) is January (4.2°C).
Average pressure in September
Arronches, Portugal
- Average pressure in September: 1016.3mbar
The month with the highest atmospheric pressure is December (1023mbar).
The month with the lowest atmospheric pressure is April (1015.2mbar).
Average wind speed in September
Arronches, Portugal
- Average wind speed in September: 8.4km/h
The windiest month (with the highest average wind speed) is February (12.1km/h).
The calmest month (with the lowest average wind speed) is September (8.4km/h).
Average humidity in September
Arronches, Portugal
- Average humidity in September: 48%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is August (43%).
Average rainfall in September
Arronches, Portugal
- Average rainfall in September: 8mm
The wettest month (with the highest rainfall) is November (39mm).
The driest month (with the least rainfall) is July (3mm).
Average rainfall days in September
Arronches, Portugal
- Average rainfall days in September: 4.8 days
The month with the highest number of rainy days is April (11.7 days).
The month with the least rainy days is July (1.7 days).
Average snowfall in September
Arronches, Portugal
- Average snowfall in September: 0mm
The month with the highest snowfall is February (5mm).
The months with the least snowfall are April, May, June, July, August, September, October, November and December (0mm).
Average snowfall days in September
Arronches, Portugal
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.4 days).
The months with the least snowfall days are April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Arronches, 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 3min
The months with the most sunshine are July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).
Average sunshine days in September
Arronches, Portugal
- Average sunshine days in September: 24 days
The month with the most sunshine days is July (28.7 days).
The month with the least sunshine days is April (16.6 days).
Average UV index in September
Arronches, Portugal
- Average UV index in September: 6
The month with the highest UV index is August (UV index 7).
The months with the lowest UV index are January, February, March, November and December (UV index 3).
Average cloud cover in September
Arronches, Portugal
- Average cloud cover in September: 16
The month with the most cloud cover is January (Cloud cover 42).
The months with the least cloud cover are July and August (Cloud cover 8).
Average visibility in September
Arronches, Portugal
- Average visibility in September: 10km
The months with the highest visibility are June, July, August and September (10km).
The month with the lowest visibility is January (8km).
