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The table shows the combined weather forecast in Lewistown 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 Lewistown

Date Time Weather type Air temperature, °C Atmospheric pressure Wind Precipitation, mm Tef, °C Tefs, °C Weather comfort
04.04
Fri
day
15 h
Clear -6 659 SW
2 m/s
0.0 -9 -6
04.04
Fri
even
18 h
Clear -1 661 W
2 m/s
0.0 -3 +8
04.04
Fri
even
21 h
Partly cloudy +2 661 NW
4 m/s
0.0 -1 +2
05.04
Sat
night
00 h
Light cloudy +2 661 NW
4 m/s
0.0 -2 -1
05.04
Sat
night
03 h
Clear -2 660 NW
1 m/s
0.0 -2 -2
05.04
Sat
morn
06 h
Clear -4 660 S
3 m/s
0.0 -7 -7
05.04
Sat
morn
09 h
Clear -4 659 S
3 m/s
0.0 -7 -7
05.04
Sat
day
12 h
Clear -4 658 S
3 m/s
0.0 -8 -8
05.04
Sat
day
15 h
Clear -2 659 S
2 m/s
0.0 -4 -1
05.04
Sat
even
18 h
Clear +5 660 SW
2 m/s
0.0 +4 +16
05.04
Sat
even
21 h
Clear +7 659 W
2 m/s
0.0 +7 +18
06.04
Sun
night
00 h
Clear +10 659 W
2 m/s
0.0 +9 +11
06.04
Sun
night
03 h
Clear +4 656 SW
1 m/s
0.0 +4 +4
06.04
Sun
morn
06 h
Light cloudy +2 655 S
3 m/s
0.0 -1 -1
06.04
Sun
morn
09 h
Light cloudy +1 655 SW
3 m/s
0.0 -2 -2
06.04
Sun
day
12 h
Clear +1 654 SW
3 m/s
0.0 -2 -2
06.04
Sun
day
15 h
Clear +3 655 SW
2 m/s
0.0 +1 +4
06.04
Sun
even
18 h
Clear +9 657 W
2 m/s
0.0 +8 +20
06.04
Sun
even
21 h
Clear +12 657 NW
3 m/s
0.0 +11 +20
07.04
Mon
night
00 h
Clear +13 657 NW
3 m/s
0.0 +13 +15
07.04
Mon
night
03 h
Clear +8 655 E
1 m/s
0.0 +8 +8
07.04
Mon
morn
06 h
Clear +2 653 SE
2 m/s
0.0 +1 +1
07.04
Mon
morn
09 h
Clear +1 651 SE
3 m/s
0.0 -2 -2
Fri, 04.04
Fri
Fri
Fri
Sat
Sat
Sat
Sat
Sat
15 h
18 h
21 h
00 h
03 h
06 h
09 h
12 h
Air temperature,°С
-6
-1
+2
+2
-2
-4
-4
-4
Atmospheric pressure
659
661
661
661
660
660
659
658
Wind
SW
2 m/s
W
2 m/s
NW
4 m/s
NW
4 m/s
NW
1 m/s
S
3 m/s
S
3 m/s
S
3 m/s
Precipitation, mm
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Tef,°C
-9
-3
-1
-2
-2
-7
-7
-8
Tefs,°C
-6
+8
+2
-1
-2
-7
-7
-8
Weather comfort
 
 
 
 
 
 
 
 
Sat
Sat
Sat
Sun
Sun
Sun
Sun
Sun
15 h
18 h
21 h
00 h
03 h
06 h
09 h
12 h
Air temperature,°С
-2
+5
+7
+10
+4
+2
+1
+1
Atmospheric pressure
659
660
659
659
656
655
655
654
Wind
S
2 m/s
SW
2 m/s
W
2 m/s
W
2 m/s
SW
1 m/s
S
3 m/s
SW
3 m/s
SW
3 m/s
Precipitation, mm
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Tef,°C
-4
+4
+7
+9
+4
-1
-2
-2
Tefs,°C
-1
+16
+18
+11
+4
-1
-2
-2
Weather comfort
 
 
 
 
 
 
 
 
Sun
Sun
Sun
Mon
Mon
Mon
Mon
15 h
18 h
21 h
00 h
03 h
06 h
09 h
Air temperature,°С
+3
+9
+12
+13
+8
+2
+1
Atmospheric pressure
655
657
657
657
655
653
651
Wind
SW
2 m/s
W
2 m/s
NW
3 m/s
NW
3 m/s
E
1 m/s
SE
2 m/s
SE
3 m/s
Precipitation, mm
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Tef,°C
+1
+8
+11
+13
+8
+1
-2
Tefs,°C
+4
+20
+20
+15
+8
+1
-2
Weather comfort
 
 
 
 
 
 
 
 
  • Fri, 04.04
  • Sat, 05.04
  • Sun, 06.04
Location of a geographical point Lewistown (Montana, USA): latitude 47.0492 longitude -109.4578 height above sea level 1263 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.