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The table shows the combined weather forecast in Porto for three days ahead, automatically compiled according to several independent sources. The time is local. The atmospheric pressure in mm of mercury - at the level of the city (station).
The indicators of Tef (effective temperature), Tefs (effective sun temperature) and verbal characteristics of weather comfort are given (see explanations below).

Weather in Porto

Date Time Weather type Air temperature, °C Atmospheric pressure Wind Precipitation, mm Tef, °C Tefs, °C Weather comfort
26.12
Thu
night
00 h
Clear +8 763 E
2 m/s
0.0 +8 +8
26.12
Thu
night
03 h
Clear +7 763 E
2 m/s
0.0 +7 +7
26.12
Thu
morn
06 h
Clear +7 763 E
3 m/s
0.0 +5 +5
26.12
Thu
morn
09 h
Clear +7 764 E
3 m/s
0.0 +6 +6
26.12
Thu
day
12 h
Clear +14 764 E
2 m/s
0.0 +14 +18
26.12
Thu
day
15 h
Clear +16 763 NE
1 m/s
0.0 +17 +19
26.12
Thu
even
18 h
Clear +12 763 N
1 m/s
0.0 +12 +12
26.12
Thu
even
21 h
Clear +9 764 E
2 m/s
0.0 +9 +9
27.12
Fri
night
00 h
Clear +8 763 E
2 m/s
0.0 +7 +7
27.12
Fri
night
03 h
Clear +7 763 E
2 m/s
0.0 +6 +6
27.12
Fri
morn
06 h
Clear +6 763 E
3 m/s
0.0 +4 +4
27.12
Fri
morn
09 h
Clear +7 764 E
3 m/s
0.0 +5 +5
27.12
Fri
day
12 h
Clear +13 764 E
2 m/s
0.0 +13 +17
27.12
Fri
day
15 h
Clear +15 763 E
1 m/s
0.0 +16 +18
27.12
Fri
even
18 h
Clear +11 764 NE
1 m/s
0.0 +12 +12
27.12
Fri
even
21 h
Clear +9 764 E
3 m/s
0.0 +7 +7
28.12
Sat
night
00 h
Clear +7 764 E
3 m/s
0.0 +6 +6
28.12
Sat
night
03 h
Clear +7 765 E
3 m/s
0.0 +5 +5
28.12
Sat
morn
06 h
Clear +6 764 E
3 m/s
0.0 +4 +4
28.12
Sat
morn
09 h
Clear +6 765 E
3 m/s
0.0 +4 +4
28.12
Sat
day
12 h
Clear +13 765 E
2 m/s
0.0 +12 +16
28.12
Sat
day
15 h
Clear +14 764 E
2 m/s
0.0 +14 +16
28.12
Sat
even
18 h
Clear +10 765 N
1 m/s
0.0 +11 +11
Thu, 26.12
Thu
Thu
Thu
Thu
Thu
Thu
Thu
Thu
00 h
03 h
06 h
09 h
12 h
15 h
18 h
21 h
Air temperature,°С
+8
+7
+7
+7
+14
+16
+12
+9
Atmospheric pressure
763
763
763
764
764
763
763
764
Wind
E
2 m/s
E
2 m/s
E
3 m/s
E
3 m/s
E
2 m/s
NE
1 m/s
N
1 m/s
E
2 m/s
Precipitation, mm
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Tef,°C
+8
+7
+5
+6
+14
+17
+12
+9
Tefs,°C
+8
+7
+5
+6
+18
+19
+12
+9
Weather comfort
 
 
 
 
 
 
 
 
Fri
Fri
Fri
Fri
Fri
Fri
Fri
Fri
00 h
03 h
06 h
09 h
12 h
15 h
18 h
21 h
Air temperature,°С
+8
+7
+6
+7
+13
+15
+11
+9
Atmospheric pressure
763
763
763
764
764
763
764
764
Wind
E
2 m/s
E
2 m/s
E
3 m/s
E
3 m/s
E
2 m/s
E
1 m/s
NE
1 m/s
E
3 m/s
Precipitation, mm
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Tef,°C
+7
+6
+4
+5
+13
+16
+12
+7
Tefs,°C
+7
+6
+4
+5
+17
+18
+12
+7
Weather comfort
 
 
 
 
 
 
 
 
Sat
Sat
Sat
Sat
Sat
Sat
Sat
00 h
03 h
06 h
09 h
12 h
15 h
18 h
Air temperature,°С
+7
+7
+6
+6
+13
+14
+10
Atmospheric pressure
764
765
764
765
765
764
765
Wind
E
3 m/s
E
3 m/s
E
3 m/s
E
3 m/s
E
2 m/s
E
2 m/s
N
1 m/s
Precipitation, mm
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Tef,°C
+6
+5
+4
+4
+12
+14
+11
Tefs,°C
+6
+5
+4
+4
+16
+16
+11
Weather comfort
 
 
 
 
 
 
 
 
  • Thu, 26.12
  • Fri, 27.12
  • Sat, 28.12
Location of a geographical point Porto (Portugal): latitude 41.23 longitude -8.68 height above sea level 77 m.
Navigation:
Notes:
Tef - Effective temperature - the temperature felt by a seasonally dressed person in the shade. The calculation takes into account the influence of humidity, wind speed and atmospheric pressure on the human heat perception.
Tefs - Effective sun temperature - the temperature that a person feels, adjusted for solar radiation. Depends on the amount of cloud cover and the height of the sun above the horizon. At night and in cloudy weather the correction is zero.
Weather comfort - a verbal characteristic that characterizes the favorability or unfavorability of forecast meteorological conditions for a seasonally dressed person. Both relative characteristics are used: warm, cool, cold, very cold, showing how much the expected Tef will be higher or lower than the norm, and absolute ones: the risk of sunstroke, the risk of overheating, hot, very hot, stuffy, very stuffy, comfort, the risk of colds, the risk of frostbite that occur when the Tef, Tefs, air temperature or a combination of certain criteria are reached.