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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
25.04
Fri
day
15 h
Light cloudy +4 657 E
3 m/s
0.0 +2 +5
25.04
Fri
even
18 h
Light cloudy +9 657 SE
4 m/s
0.0 +7 +14
25.04
Fri
even
21 h
Mostly cloudy +11 656 SE
5 m/s
0.0 +9 +11
26.04
Sat
night
00 h
Partly cloudy +11 655 SE
5 m/s
0.0 +10 +11
26.04
Sat
night
03 h
Clear +8 653 SE
4 m/s
0.0 +6 +6
26.04
Sat
morn
06 h
Clear +5 652 E
4 m/s
0.0 +3 +3
26.04
Sat
morn
09 h
Clear +4 649 E
2 m/s
0.0 +2 +2
26.04
Sat
day
12 h
Clear +1 647 SE
2 m/s
0.0 0 0
26.04
Sat
day
15 h
Clear +4 648 E
1 m/s
0.0 +5 +10
26.04
Sat
even
18 h
Clear +12 649 N
1 m/s
0.0 +13 +27
26.04
Sat
even
21 h
Light cloudy +18 649 NW
2 m/s
0.0 +18 +27
27.04
Sun
night
00 h
Light rain +18 649 W
2 m/s
0.4 +18 +21
27.04
Sun
night
03 h
Clear +13 647 S
2 m/s
0.0 +13 +13
27.04
Sun
morn
06 h
Clear +9 646 S
2 m/s
0.0 +8 +8
27.04
Sun
morn
09 h
Clear +7 645 S
2 m/s
0.0 +6 +6
27.04
Sun
day
12 h
Light cloudy +6 645 S
1 m/s
0.0 +6 +6
27.04
Sun
day
15 h
Partly cloudy +10 647 S
1 m/s
0.0 +10 +13
27.04
Sun
even
18 h
Clear +15 649 NW
2 m/s
0.0 +15 +27
27.04
Sun
even
21 h
Rain +15 648 N
3 m/s
1.0 +15 +21
28.04
Mon
night
00 h
Rain +14 648 N
3 m/s
1.0 +14 +15
28.04
Mon
night
03 h
Light rain +11 648 N
2 m/s
0.3 +10 +10
28.04
Mon
morn
06 h
Light rain +9 649 NW
2 m/s
0.5 +9 +9
28.04
Mon
morn
09 h
Rain +8 650 N
5 m/s
1.3 +5 +5
Fri, 25.04
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
+4
+9
+11
+11
+8
+5
+4
+1
Atmospheric pressure
657
657
656
655
653
652
649
647
Wind
E
3 m/s
SE
4 m/s
SE
5 m/s
SE
5 m/s
SE
4 m/s
E
4 m/s
E
2 m/s
SE
2 m/s
Precipitation, mm
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Tef,°C
+2
+7
+9
+10
+6
+3
+2
0
Tefs,°C
+5
+14
+11
+11
+6
+3
+2
0
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
+4
+12
+18
+18
+13
+9
+7
+6
Atmospheric pressure
648
649
649
649
647
646
645
645
Wind
E
1 m/s
N
1 m/s
NW
2 m/s
W
2 m/s
S
2 m/s
S
2 m/s
S
2 m/s
S
1 m/s
Precipitation, mm
0.0
0.0
0.0
0.4
0.0
0.0
0.0
0.0
Tef,°C
+5
+13
+18
+18
+13
+8
+6
+6
Tefs,°C
+10
+27
+27
+21
+13
+8
+6
+6
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
+10
+15
+15
+14
+11
+9
+8
Atmospheric pressure
647
649
648
648
648
649
650
Wind
S
1 m/s
NW
2 m/s
N
3 m/s
N
3 m/s
N
2 m/s
NW
2 m/s
N
5 m/s
Precipitation, mm
0.0
0.0
1.0
1.0
0.3
0.5
1.3
Tef,°C
+10
+15
+15
+14
+10
+9
+5
Tefs,°C
+13
+27
+21
+15
+10
+9
+5
Weather comfort
 
 
 
 
 
 
 
 
  • Fri, 25.04
  • Sat, 26.04
  • Sun, 27.04
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.