September weather forecastVale, Portugal

September

Weather in September

September, the first month of the autumn in Vale, is still a warm month, with temperature in the range of an average low of 13.7°C (56.7°F) and an average high of 26.4°C (79.5°F).

Temperature

Vale transitions into September recording an average high-temperature of a still moderately hot 26.4°C (79.5°F), closely aligning with the preceding month's temperature. A noteworthy thermal contrast characterizes Vale's September nights, with temperatures averaging at a moderate 13.7°C (56.7°F).

Humidity

In Vale, the average relative humidity in September is 63%.

Rainfall

In Vale, in September, it is raining for 6.5 days, with typically 26mm (1.02") of accumulated precipitation. Throughout the year, there are 127.7 rainfall days, and 618mm (24.33") of precipitation is accumulated.

Snowfall

May through October and December are months without snowfall.

Daylight

In September, the average length of the day is 12h and 28min.
On the first day of September, sunrise is at 07:01 and sunset at 20:06. On the last day of the month, sunrise is at 07:29 and sunset at 19:17 WEST.

Sunshine

The average sunshine in September is 9.2h.

UV index

In Vale, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, an average UV index of 5 transforms into the following instructions:
Put precautions into practice - Protective measures against sun-induced damage are advised. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.

Updated: Aug 21, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature during September is 26.4°C (79.5°F) and the low-temperature is 13.7°C (56.7°F). The average heat index (a.k.a. 'real feel', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in August is computed to be 31°C (87.8°F).

In September, the average relative humidity is 63%.

In Vale, in September, during 6.5 rainfall days, 26mm (1.02") of precipitation is typically accumulated.

May through October and December are months without snowfall.

The average day length in September is 12h and 28min.

On the first day of September in Vale, sunrise is at 07:01 and sunset at 20:06. On the last day of the month, sunrise is at 07:29 and sunset at 19:17 WEST.

In September, the average sunshine duration is 9.2h.

In Vale, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

28.8°C

26.4°C

21.6°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

8.7km/h

8.2km/h

8.5km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

21.7

18.2

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Vale, Portugal

Average high temperature in September: 26.4°C

The warmest month (with the highest average high temperature) is August (28.8°C).
The month with the lowest average high temperature is January (12°C).

Average low temperature in September: 13.7°C

The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is January (4.3°C).

Average pressure in September
Vale, Portugal

Average pressure in September: 1017mbar

The month with the highest atmospheric pressure is December (1022.7mbar).
The month with the lowest atmospheric pressure is April (1015.3mbar).

Average wind speed in September
Vale, Portugal

Average wind speed in September: 7km/h

The windiest month (with the highest average wind speed) is March (8.8km/h).
The calmest month (with the lowest average wind speed) is September (7km/h).

Average humidity in September
Vale, Portugal

Average humidity in September: 63%

The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is August (62%).

Average rainfall in September
Vale, Portugal

Average rainfall in September: 26mm

The wettest month (with the highest rainfall) is November (96mm).
The driest month (with the least rainfall) is July (6mm).

Average rainfall days in September
Vale, Portugal

Average rainfall days in September: 6.5 days

The months with the highest number of rainy days are January and April (14.7 days).
The month with the least rainy days is August (3.9 days).

Average snowfall in September
Vale, Portugal

Average snowfall in September: 0mm

The months with the highest snowfall are January and March (2mm).
The months with the least snowfall are May, June, July, August, September, October and December (0mm).

Average snowfall days in September
Vale, Portugal

Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January, February and March (0.3 days).
The months with the least snowfall days are May, June, July, August, September, October and December (0 days).

Average daylight in September /
Average sunshine in September
Vale, Portugal

Average daylight in September: 12h and 30min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

Average sunshine in September: 9h and 12min

The month with the most sunshine is July (Average sunshine: 11h and 24min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).