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The table shows the combined weather forecast in Williston 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 Williston

Date Time Weather type Air temperature, °C Atmospheric pressure Wind Precipitation, mm Tef, °C Tefs, °C Weather comfort
21.12
Sat
day
12 h
Light cloudy -13 710 S
1 m/s
0.0 -15 -15
21.12
Sat
day
15 h
Mostly cloudy -13 709 SE
1 m/s
0.0 -15 -15
21.12
Sat
even
18 h
Clear -6 709 S
2 m/s
0.0 -9 -7
21.12
Sat
even
21 h
Clear -3 707 S
1 m/s
0.0 -3 -2
22.12
Sun
night
00 h
Clear -7 706 SW
1 m/s
0.0 -8 -8
22.12
Sun
night
03 h
Clear -9 705 S
1 m/s
0.0 -10 -10
22.12
Sun
morn
06 h
Light cloudy -9 705 NW
1 m/s
0.0 -11 -11
22.12
Sun
morn
09 h
Mostly cloudy -10 705 NE
1 m/s
0.0 -12 -12
22.12
Sun
day
12 h
Cloudy -10 705 E
1 m/s
0.0 -12 -12
22.12
Sun
day
15 h
Cloudy -7 706 SE
1 m/s
0.0 -9 -9
22.12
Sun
even
18 h
Snow -3 707 SW
2 m/s
2.1 -6 -6
22.12
Sun
even
21 h
Snow with rain -0 706 SW
2 m/s
1.3 -2 -2
23.12
Mon
night
00 h
Light rain 0 707 W
1 m/s
0.3 0 0
23.12
Mon
night
03 h
Mostly cloudy -1 708 NW
2 m/s
0.1 -3 -3
23.12
Mon
morn
06 h
Cloudy -2 709 NW
1 m/s
0.0 -2 -2
23.12
Mon
morn
09 h
Cloudy -3 709 W
1 m/s
0.0 -3 -3
23.12
Mon
day
12 h
Cloudy -3 709 SE
1 m/s
0.0 -3 -3
23.12
Mon
day
15 h
Cloudy -2 710 S
3 m/s
0.0 -5 -5
23.12
Mon
even
18 h
Clear -2 710 S
3 m/s
0.0 -5 -4
23.12
Mon
even
21 h
Clear -1 709 S
2 m/s
0.0 -2 -1
24.12
Tue
night
00 h
Clear -3 709 S
2 m/s
0.0 -6 -6
24.12
Tue
night
03 h
Partly cloudy -3 709 SW
2 m/s
0.0 -6 -6
24.12
Tue
morn
06 h
Light cloudy -3 709 SW
3 m/s
0.0 -6 -6
Sat, 21.12
Sat
Sat
Sat
Sat
Sun
Sun
Sun
Sun
12 h
15 h
18 h
21 h
00 h
03 h
06 h
09 h
Air temperature,°С
-13
-13
-6
-3
-7
-9
-9
-10
Atmospheric pressure
710
709
709
707
706
705
705
705
Wind
S
1 m/s
SE
1 m/s
S
2 m/s
S
1 m/s
SW
1 m/s
S
1 m/s
NW
1 m/s
NE
1 m/s
Precipitation, mm
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Tef,°C
-15
-15
-9
-3
-8
-10
-11
-12
Tefs,°C
-15
-15
-7
-2
-8
-10
-11
-12
Weather comfort
 
 
 
 
 
 
 
 
Sun
Sun
Sun
Sun
Mon
Mon
Mon
Mon
12 h
15 h
18 h
21 h
00 h
03 h
06 h
09 h
Air temperature,°С
-10
-7
-3
-0
0
-1
-2
-3
Atmospheric pressure
705
706
707
706
707
708
709
709
Wind
E
1 m/s
SE
1 m/s
SW
2 m/s
SW
2 m/s
W
1 m/s
NW
2 m/s
NW
1 m/s
W
1 m/s
Precipitation, mm
0.0
0.0
2.1
1.3
0.3
0.1
0.0
0.0
Tef,°C
-12
-9
-6
-2
0
-3
-2
-3
Tefs,°C
-12
-9
-6
-2
0
-3
-2
-3
Weather comfort
 
 
 
 
 
 
 
 
Mon
Mon
Mon
Mon
Tue
Tue
Tue
12 h
15 h
18 h
21 h
00 h
03 h
06 h
Air temperature,°С
-3
-2
-2
-1
-3
-3
-3
Atmospheric pressure
709
710
710
709
709
709
709
Wind
SE
1 m/s
S
3 m/s
S
3 m/s
S
2 m/s
S
2 m/s
SW
2 m/s
SW
3 m/s
Precipitation, mm
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Tef,°C
-3
-5
-5
-2
-6
-6
-6
Tefs,°C
-3
-5
-4
-1
-6
-6
-6
Weather comfort
 
 
 
 
 
 
 
 
  • Sat, 21.12
  • Sun, 22.12
  • Mon, 23.12
Location of a geographical point Williston (North Dakota, USA): latitude 48.1739 longitude -103.6367 height above sea level 580 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.