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www.weatherandclimate.info
The table shows the combined weather forecast in Helena for 14 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 Helena

Date Time Weather type Air temperature, °C Atmospheric pressure Wind Precipitation, mm Tef, °C Tefs, °C Weather comfort
21.11
Thu
day
12 h
Light cloudy -3 659 S
1 m/s
0.0 -4 -4
21.11
Thu
even
18 h
Mostly cloudy +2 660 E
1 m/s
0.0 +2 +3
22.11
Fri
night
00 h
Partly cloudy +1 659 calm 0.0 +2 +2
22.11
Fri
morn
06 h
Mostly cloudy +1 660 W
1 m/s
0.0 0 0
22.11
Fri
day
12 h
Mostly cloudy -1 660 NW
1 m/s
0.0 -1 -1
22.11
Fri
even
18 h
Snow -1 660 NW
1 m/s
1.2 -2 -2
23.11
Sat
night
00 h
Light snow -2 659 NW
1 m/s
0.3 -2 -2
23.11
Sat
morn
06 h
Mostly cloudy -2 657 W
1 m/s
0.0 -2 -2
23.11
Sat
day
12 h
Light snow -2 653 SW
1 m/s
0.4 -2 -2
23.11
Sat
even
18 h
Snow with rain +2 650 S
2 m/s
0.1 0 0
24.11
Sun
night
00 h
Snow -1 650 N
3 m/s
0.7 -4 -4
24.11
Sun
morn
06 h
Snow -6 654 NW
2 m/s
1.1 -9 -9
24.11
Sun
day
12 h
Light snow -10 658 SW
1 m/s
0.1 -11 -11
24.11
Sun
even
18 h
Mostly cloudy -9 661 N
1 m/s
0.1 -11 -10
25.11
Mon
night
00 h
Partly cloudy -7 661 SW
1 m/s
0.0 -8 -8
25.11
Mon
morn
06 h
Light cloudy -11 661 SW
1 m/s
0.0 -13 -13
25.11
Mon
day
12 h
Clear -12 661 SW
1 m/s
0.0 -14 -14
25.11
Mon
even
18 h
Partly cloudy -6 662 NE
1 m/s
0.0 -7 -6
26.11
Tue
night
00 h
Light cloudy -6 659 SW
1 m/s
0.0 -7 -7
26.11
Tue
morn
06 h
Light cloudy -10 658 SW
2 m/s
0.0 -13 -13
26.11
Tue
day
12 h
Light cloudy -10 658 SW
1 m/s
0.0 -11 -11
26.11
Tue
even
18 h
Light cloudy -4 660 NE
1 m/s
0.0 -5 -3
27.11
Wen
night
00 h
Partly cloudy -2 658 W
2 m/s
0.0 -4 -4
27.11
Wen
morn
06 h
Mostly cloudy -6 657 SW
2 m/s
0.0 -9 -9
27.11
Wen
day
12 h
Light snow -7 658 SW
2 m/s
0.1 -10 -10
27.11
Wen
even
18 h
Light cloudy -2 662 N
1 m/s
0.0 -2 -0
28.11
Thu
night
00 h
Light cloudy -2 662 SW
2 m/s
0.0 -4 -4
28.11
Thu
morn
06 h
Partly cloudy -7 663 SW
1 m/s
0.0 -8 -8
28.11
Thu
day
12 h
Cloudy -8 665 N
1 m/s
0.0 -10 -10
28.11
Thu
even
18 h
Partly cloudy -6 665 SE
1 m/s
0.0 -9 -8
29.11
Fri
night
00 h
Mostly cloudy -8 664 SW
1 m/s
0.0 -11 -11
29.11
Fri
morn
06 h
Cloudy -9 663 SW
1 m/s
0.0 -11 -11
29.11
Fri
day
12 h
Cloudy -8 661 calm 0.0 -9 -9
29.11
Fri
even
18 h
Cloudy -4 661 calm 0.0 -6 -6
30.11
Sat
night
00 h
Cloudy -5 659 N
1 m/s
0.0 -7 -7
30.11
Sat
morn
06 h
Cloudy -10 659 SW
1 m/s
0.0 -12 -12
30.11
Sat
day
12 h
Cloudy -9 663 W
2 m/s
0.0 -14 -14
30.11
Sat
even
18 h
Partly cloudy -4 665 SW
1 m/s
0.0 -7 -6
01.12
Sun
night
00 h
Light cloudy -6 665 W
2 m/s
0.0 -11 -11
01.12
Sun
morn
06 h
Light cloudy -7 665 SW
1 m/s
0.0 -10 -10
01.12
Sun
day
12 h
Partly cloudy -7 665 W
1 m/s
0.0 -10 -10
01.12
Sun
even
18 h
Clear +1 665 calm 0.0 -1 +1
02.12
Mon
night
00 h
Mostly cloudy -2 664 SW
1 m/s
0.0 -5 -5
02.12
Mon
morn
06 h
Cloudy -6 664 SW
1 m/s
0.0 -8 -8
02.12
Mon
day
12 h
Clear -8 665 calm 0.0 -9 -9
02.12
Mon
even
18 h
Cloudy -3 667 calm 0.0 -4 -4
03.12
Tue
night
00 h
Cloudy -4 665 W
1 m/s
0.0 -6 -6
03.12
Tue
morn
06 h
Clear -6 664 W
1 m/s
0.0 -9 -9
03.12
Tue
day
12 h
Clear -7 664 SW
1 m/s
0.0 -9 -9
03.12
Tue
even
18 h
Cloudy 0 665 calm 0.0 -1 -1
04.12
Wen
night
00 h
Cloudy -2 663 W
1 m/s
0.0 -5 -5
04.12
Wen
morn
06 h
Partly cloudy -4 664 SW
1 m/s
0.0 -6 -6
04.12
Wen
day
12 h
Cloudy -5 663 calm 0.0 -6 -6
04.12
Wen
even
18 h
Cloudy -2 667 N
2 m/s
0.0 -6 -6
05.12
Thu
night
00 h
Cloudy -9 669 N
2 m/s
0.2 -14 -14
05.12
Thu
morn
06 h
Light snow -12 671 N
1 m/s
1.0 -14 -14
Thu, 21.11
Thu
Thu
Fri
Fri
Fri
Fri
Sat
Sat
12 h
18 h
00 h
06 h
12 h
18 h
00 h
06 h
Air temperature,°С
-3
+2
+1
+1
-1
-1
-2
-2
Atmospheric pressure
659
660
659
660
660
660
659
657
Wind
S
1 m/s
E
1 m/s
calm
W
1 m/s
NW
1 m/s
NW
1 m/s
NW
1 m/s
W
1 m/s
Precipitation, mm
0.0
0.0
0.0
0.0
0.0
1.2
0.3
0.0
Tef,°C
-4
+2
+2
0
-1
-2
-2
-2
Tefs,°C
-4
+3
+2
0
-1
-2
-2
-2
Weather comfort
 
 
 
 
 
 
 
 
Sat
Sat
Sun
Sun
Sun
Sun
Mon
Mon
12 h
18 h
00 h
06 h
12 h
18 h
00 h
06 h
Air temperature,°С
-2
+2
-1
-6
-10
-9
-7
-11
Atmospheric pressure
653
650
650
654
658
661
661
661
Wind
SW
1 m/s
S
2 m/s
N
3 m/s
NW
2 m/s
SW
1 m/s
N
1 m/s
SW
1 m/s
SW
1 m/s
Precipitation, mm
0.4
0.1
0.7
1.1
0.1
0.1
0.0
0.0
Tef,°C
-2
0
-4
-9
-11
-11
-8
-13
Tefs,°C
-2
0
-4
-9
-11
-10
-8
-13
Weather comfort
 
 
 
 
 
 
 
 
Mon
Mon
Tue
Tue
Tue
Tue
Wen
Wen
12 h
18 h
00 h
06 h
12 h
18 h
00 h
06 h
Air temperature,°С
-12
-6
-6
-10
-10
-4
-2
-6
Atmospheric pressure
661
662
659
658
658
660
658
657
Wind
SW
1 m/s
NE
1 m/s
SW
1 m/s
SW
2 m/s
SW
1 m/s
NE
1 m/s
W
2 m/s
SW
2 m/s
Precipitation, mm
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Tef,°C
-14
-7
-7
-13
-11
-5
-4
-9
Tefs,°C
-14
-6
-7
-13
-11
-3
-4
-9
Weather comfort
 
 
 
 
 
 
 
 
Wen
Wen
Thu
Thu
Thu
Thu
Fri
Fri
12 h
18 h
00 h
06 h
12 h
18 h
00 h
06 h
Air temperature,°С
-7
-2
-2
-7
-8
-6
-8
-9
Atmospheric pressure
658
662
662
663
665
665
664
663
Wind
SW
2 m/s
N
1 m/s
SW
2 m/s
SW
1 m/s
N
1 m/s
SE
1 m/s
SW
1 m/s
SW
1 m/s
Precipitation, mm
0.1
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Tef,°C
-10
-2
-4
-8
-10
-9
-11
-11
Tefs,°C
-10
-0
-4
-8
-10
-8
-11
-11
Weather comfort
 
 
 
 
 
 
 
 
Fri
Fri
Sat
Sat
Sat
Sat
Sun
Sun
12 h
18 h
00 h
06 h
12 h
18 h
00 h
06 h
Air temperature,°С
-8
-4
-5
-10
-9
-4
-6
-7
Atmospheric pressure
661
661
659
659
663
665
665
665
Wind
calm
calm
N
1 m/s
SW
1 m/s
W
2 m/s
SW
1 m/s
W
2 m/s
SW
1 m/s
Precipitation, mm
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Tef,°C
-9
-6
-7
-12
-14
-7
-11
-10
Tefs,°C
-9
-6
-7
-12
-14
-6
-11
-10
Weather comfort
 
 
 
 
 
 
 
 
Sun
Sun
Mon
Mon
Mon
Mon
Tue
Tue
12 h
18 h
00 h
06 h
12 h
18 h
00 h
06 h
Air temperature,°С
-7
+1
-2
-6
-8
-3
-4
-6
Atmospheric pressure
665
665
664
664
665
667
665
664
Wind
W
1 m/s
calm
SW
1 m/s
SW
1 m/s
calm
calm
W
1 m/s
W
1 m/s
Precipitation, mm
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Tef,°C
-10
-1
-5
-8
-9
-4
-6
-9
Tefs,°C
-10
+1
-5
-8
-9
-4
-6
-9
Weather comfort
 
 
 
 
 
 
 
 
Tue
Tue
Wen
Wen
Wen
Wen
Thu
Thu
12 h
18 h
00 h
06 h
12 h
18 h
00 h
06 h
Air temperature,°С
-7
0
-2
-4
-5
-2
-9
-12
Atmospheric pressure
664
665
663
664
663
667
669
671
Wind
SW
1 m/s
calm
W
1 m/s
SW
1 m/s
calm
N
2 m/s
N
2 m/s
N
1 m/s
Precipitation, mm
0.0
0.0
0.0
0.0
0.0
0.0
0.2
1.0
Tef,°C
-9
-1
-5
-6
-6
-6
-14
-14
Tefs,°C
-9
-1
-5
-6
-6
-6
-14
-14
Weather comfort
 
 
 
 
 
 
 
 
  • Thu, 21.11
  • Sat, 23.11
  • Mon, 25.11
  • Wen, 27.11
  • Fri, 29.11
  • Sun, 01.12
  • Tue, 03.12
Location of a geographical point Helena (Montana, USA): latitude 46.6056 longitude -111.9636 height above sea level 1167 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.