September weather forecast
Coimbra, Portugal

Embracing the arrival of autumn, September brings a subtle decrease in temperature, making the days and nights in Coimbra more comfortable. The rainfall level rises again to 52mm (2.05"), signaling the end of dry summer months. Yet, the presence of considerable amounts of sunshine hints at an ongoing sunny spell in the city. September represents a seasonal transition with both sun and rain adding to the city's appeal.

Temperature

Upon the beginning of September, Coimbra's high-temperatures register at a still moderately hot 27.3°C (81.1°F), closely mirroring the preceding month. Coimbra sees a consistent average low-temperature of 14.1°C (57.4°F) in September, indicating a substantial decrease from the day's temperature.

Rainfall

In Coimbra, during September, the rain falls for 9 days and regularly aggregates up to 52mm (2.05") of precipitation. Throughout the year, in Coimbra, there are 145 rainfall days, and 905mm (35.63") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 27min.
On the first day of September in Coimbra, sunrise is at 07:01 and sunset at 20:05. 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 7.6h.

UV index

In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health hazard from exposure to the Sun's UV rays for the average person.
Note: A daily maximum UV index of 6 in September translates into the following instructions:
Beware of overexposure. Fair-skinned individuals risk burning in less than 20 minutes. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.