LAGOA DE SANTO ANDRÉ
38° 05′ 59″ N, 8° 47′ 40″ W
Climate
The climate is Mediterranean subtropical. The region has mild, rainy winters and relatively hot and very dry summers. There is a strong maritime influence that moderates temperatures and regulates atmospheric humidity. Temperatures remain generally mild throughout the year, except during periods of rising winds, when these can rise (summer) or fall (winter) precipitously for a few days.
The wind regime is an important factor in the region's climate. The dominant winds are from the north and northwest quadrant. In winter, it is normal to have periods with winds from the west quadrant, associated with the polar front, while in summer, almost every day, easterly winds occur during the night that run northwest and west during the afternoon (north), associated with high pressures. subtropical areas that occur near the Azores and the thermal low of Iberia. On summer afternoons (especially in June and July) moderate to strong sea breezes from NW and W are common, with the transport of moist and fresh air with a temperature around 20ºC and humidity up to 90%. In the second half of summer (August and September) the winds tend to be less intense.
In winter, storms sometimes arise with strong winds from the southwest or south that then rotate to the northwest, associated with the passage of disturbances from the polar front.
As for temperatures, annual averages are around 16-17ºC. In the warmer months (June to September) monthly averages are around 18-23°C, with nighttime minimums typically around 15-18°C and daytime maximums between 22 and 32°C. In the coldest months (December to March) the monthly averages are around 10ºC/13ºC, with night minimum values between 6ºC and 12ºC and daytime maximum values between 12ºC and 20ºC. During the year there are sporadic peaks that can vary between -3/0ºCº of absolute minimum (January/February) and 38ºC/41ºC of absolute maximum (June to September). The transition months (April/May and October/November) are pleasant, with temperatures ranging from 18ºC to 28ºC during the day and 10ºC to 15ºC at night.
The average annual precipitation is around 500 to 600 mm, the rainy season is fixed between October and April, when almost all the precipitation is accounted for, since in the summer, namely between June and September, the rains are rare and uncertain, usually occurring in the form of thunderstorms or scattered and infrequent showers. Precipitation has a torrential character typical of the south of the country and other Mediterranean areas, occurring in a concentrated manner, in a few days, when the Atlantic storms arrive in the rainy season. It is also normal for the occurrence of strong variation in precipitation between years, with rainier years followed by dry years.
The average annual insolation is very high, one of the highest in the country and in Europe, around 2600-3000h.
The sea water temperature varies between 13/16ºC in January/February and 18/22ºC in August/September.
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