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The INFORMATION YOU NEED in
A Complete Weather Page
The Weather  at SANTARÉM - Portugal
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PORTUGAL

Marés
Portos Principais com acesso a Portos Secundários


                                                                  

                                                                            



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Key to symbols and Terms
Clear sky (night)
Low-level cloud
Sleet shower (night)
Light snow
Sunny
Light rain shower (night)
Sleet shower (day)
Heavy snow shower (night)
Partly cloudy (night)
Light rain shower (day)
Sleet
Heavy snow shower (day)
Sunny Intervals
Drizzle
Hail shower (night)
Heavy snow
Dust
Light rain
Hail shower (day)
Thundery shower (night)
Mist
Heavy rain shower (night)
Hail
Thundery shower (day)
Fog
Heavy rain shower (day)
Light snow shower (night)
Thunder storm
Medium-level cloud
Heavy rain
Light snow shower (day)
Tropical storm
Not available

Key to terms and Terms
Meteorological Term Description
Unsettled A spell of weather that is more wet than dry with rainfall above average and sunshine below average.
Changeable A spell of weather which is constantly changing between wet and dry, usually with a cloudy, wet day, followed by a dry, sunny one.
Breezy A noticeable wind, usually between 10 and 20mph.
Windy Winds of between 20 and 35mph.
Very windy or stormy Winds over 35 mph, usually associated with stronger gusts, with some structural damage to buildings and some trees may be blown down.
Sunny Sunshine for most of the day, usually more than 80% of possible daytime sun.
Sunny periods More sunshine than cloud, the sun shining for periods of an hour or more at a time.
Sunny Intervals/Spells Intermittent sunshine during the day, usually less than 50% of possible daytime sun.
Bright Generally cloudy, but the cloud thin enough for weak shadows. There may be a few glimpses of the sun, but usually adding up to less than 1 hour.
Cloudy/Overcast Cloud nearly or completely covering the sky, with no shadows.
Dull/Misty Similar to cloudy/overcast but with poorer visibility, usually between 1500 and 5000 metres.
Hazy Used when horizontal visibility is reduced by smoke particles or other pollutants with visibility between 2000 metres and 10km. It can be either sunny or cloudy when hazy.
Foggy Used when horizontal visibility is below 1000 metres.
Wet Rain is expected all or most of the day, probably quite heavy at times.
Shower A short period of rain, usually less than an hour and more often between 5 and 30 minutes. The rain often quite heavy.
Rain/Snow A period of rain or snow lasting for over 2 hours and often between 3 and 6 hours in duration.
Dry No rain, snow or showers expected during the period.
Mostly dry Used when any rain, snow or shower activity is expected to be light and infrequent, with 90% of the area likely to stay completely dry.
Scattered Showers 2 or 3 showers likely at most places in a particular area during the day.
Frequent showers Showers occurring at a frequency of about one every hour.
Isolated showers 1 shower possible during the day, probably not everywhere, with quite a few areas staying dry.
High Wind Chill Usually used in winter when the wind is likely to have a significant cooling effect on the apparent temperature, often reducing it by between 5 and 20 C.
Temperature Terms used to describe the temperature relative to that expected for the time of year.
(Summer: April to September, Winter: October to March)
Warm Temperatures 2 to 3 C above seasonal average in Summer.
Very Warm Temperatures 4 to 5 C above seasonal average in Summer.
Hot Temperatures 6 C or more above seasonal average in Summer.
Rather Cool Temperatures 2 to 3 C below seasonal average in Summer.
Cool Temperatures 4 to 5 C below seasonal average in Summer.
Very Cool/Cold Temperatures 6 C or more below seasonal average in Summer.
Exceptionally Mild Temperatures 6 C or more above seasonal average in Winter.
Very Mild Temperatures 4 to 5 C or more above seasonal average in Winter.
Mild Temperatures 2 to 3 C above seasonal average in Winter.
Rather Cold Temperatures 2 to 3 C below seasonal average in Winter.
Cold Temperatures 4 to 5 C below seasonal average in Winter.
Very Cold Temperatures 6 C or more below seasonal average in Winter.


Key to terms
Meteorological Term Description
Unsettled A spell of weather that is more wet than dry with rainfall above average and sunshine below average.
Changeable A spell of weather which is constantly changing between wet and dry, usually with a cloudy, wet day, followed by a dry, sunny one.
Breezy  A noticeable wind, usually between 10 and 20mph.
Windy Winds of between 20 and 35mph.
Very windy or stormy Winds over 35 mph, usually associated with stronger gusts, with some structural damage to buildings and some trees may be blown down.
Sunny Sunshine for most of the day, usually more than 80% of possible daytime sun.
Sunny periods More sunshine than cloud, the sun shining for periods of an hour or more at a time.
Sunny Intervals/Spells Intermittent sunshine during the day, usually less than 50% of possible daytime sun.
Bright Generally cloudy, but the cloud thin enough for weak shadows. There may be a few glimpses of the sun, but usually adding up to less than 1 hour.
Cloudy/Overcast Cloud nearly or completely covering the sky, with no shadows.
Dull/Misty Similar to cloudy/overcast but with poorer visibility, usually between 1500 and 5000 metres.
Hazy Used when horizontal visibility is reduced by smoke particles or other pollutants with visibility between 2000 metres and 10km. It can be either sunny or cloudy when hazy.  
Foggy Used when horizontal visibility is below 1000 metres.
Wet Rain is expected all or most of the day, probably quite heavy at times.
Shower A short period of rain, usually less than an hour and more often between 5 and 30 minutes. The rain often quite heavy.
Rain/Snow A period of rain or snow lasting for over 2 hours and often between 3 and 6 hours in duration.
Dry No rain, snow or showers expected during the period.
Mostly dry  Used when any rain, snow or shower activity is expected to be light and infrequent, with 90% of the area likely to stay completely dry.
Scattered Showers 2 or 3 showers likely at most places in a particular area during the day.
Frequent showers Showers occurring at a frequency of about one every hour.
Isolated showers 1 shower possible during the day, probably not everywhere, with quite a few areas staying dry.
High Wind Chill Usually used in winter when the wind is likely to have a significant cooling effect on the apparent temperature, often reducing it by between 5 and 20 C.
Temperature Terms used to describe the temperature relative to  that expected for the time of year.
(Summer: April to September, Winter: October to March)

Warm Temperatures 2 to 3 C above seasonal average in Summer.
Very Warm Temperatures 4 to 5 C above seasonal average in Summer.
Hot Temperatures 6 C or more above seasonal average in Summer.
Rather Cool Temperatures 2 to 3 C below seasonal average in Summer.  
Cool Temperatures 4 to 5 C below seasonal average in Summer.
Very Cool/Cold Temperatures 6 C or more below seasonal average in Summer.
Exceptionally Mild Temperatures 6 C or more above seasonal average in Winter.
Very Mild Temperatures 4 to 5 C or more above seasonal average in Winter.
Mild Temperatures 2 to 3 C above seasonal average in Winter.
Rather Cold Temperatures 2 to 3 C below seasonal average in Winter.
Cold Temperatures 4 to 5 C below seasonal average in Winter.
Very Cold Temperatures 6 C or more below seasonal average in Winter.