WEATHER IN Helena
The table shows the combined weather forecast in Helena 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 Helena
| Date | Time | Weather type | Air temperature, °C | Atmospheric pressure | Wind | Precipitation, mm | Tef, °C | Tefs, °C | Weather comfort |
| 21.12 Sat |
day 12 h |
 |
-3 | 660 | SW 1 m/s |
0.0 | -3 | -3 | |
| 21.12 Sat |
day 15 h |
|
-4 | 659 | SW 1 m/s |
0.0 | -5 | -5 | |
| 21.12 Sat |
even 18 h |
 |
+1 | 661 | E 1 m/s |
0.0 | +1 | +1 | |
| 21.12 Sat |
even 21 h |
|
+3 | 659 | SW 1 m/s |
0.0 | +3 | +3 | |
| 22.12 Sun |
night 00 h |
 |
0 | 657 | SW 1 m/s |
0.0 | 0 | 0 | |
| 22.12 Sun |
night 03 h |
|
-0 | 656 | SW 1 m/s |
0.0 | 0 | 0 | |
| 22.12 Sun |
morn 06 h |
 |
-1 | 657 | SW 2 m/s |
0.1 | -3 | -3 | |
| 22.12 Sun |
morn 09 h |
|
+3 | 660 | W 4 m/s |
0.1 | 0 | 0 | |
| 22.12 Sun |
day 12 h |
 |
+1 | 659 | SW 3 m/s |
0.0 | -2 | -2 | |
| 22.12 Sun |
day 15 h |
|
-1 | 660 | SW 2 m/s |
0.0 | -4 | -4 | |
| 22.12 Sun |
even 18 h |
 |
+3 | 661 | SW 3 m/s |
0.0 | 0 | +1 | |
| 22.12 Sun |
even 21 h |
|
+4 | 661 | W 3 m/s |
0.0 | +2 | +4 | |
| 23.12 Mon |
night 00 h |
|
-1 | 659 | S 1 m/s |
0.0 | -1 | -1 | |
| 23.12 Mon |
night 03 h |
|
-3 | 659 | S 1 m/s |
0.0 | -4 | -4 | |
| 23.12 Mon |
morn 06 h |
 |
-3 | 659 | calm | 0.0 | -2 | -2 | |
| 23.12 Mon |
morn 09 h |
|
-2 | 659 | E 1 m/s |
0.0 | -2 | -2 | |
| 23.12 Mon |
day 12 h |
|
-2 | 659 | calm | 0.0 | -2 | -2 | |
| 23.12 Mon |
day 15 h |
|
-2 | 660 | calm | 0.0 | -2 | -2 | |
| 23.12 Mon |
even 18 h |
 |
+2 | 661 | E 1 m/s |
0.0 | +2 | +3 | |
| 23.12 Mon |
even 21 h |
|
+4 | 662 | S 2 m/s |
0.0 | +3 | +4 | |
| 24.12 Tue |
night 00 h |
|
-1 | 661 | SW 1 m/s |
0.0 | -1 | -1 | |
| 24.12 Tue |
night 03 h |
|
-3 | 661 | S 1 m/s |
0.0 | -3 | -3 | |
| 24.12 Tue |
morn 06 h |
|
-4 | 661 | SW 1 m/s |
0.0 | -5 | -5 |
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
-3
-4
+1
+3
0
-0
-1
+3
Atmospheric pressure
660
659
661
659
657
656
657
660
Wind
SW
1 m/s
1 m/s
SW
1 m/s
1 m/s
E
1 m/s
1 m/s
SW
1 m/s
1 m/s
SW
1 m/s
1 m/s
SW
1 m/s
1 m/s
SW
2 m/s
2 m/s
W
4 m/s
4 m/s
Precipitation, mm
0.0
0.0
0.0
0.0
0.0
0.0
0.1
0.1
Tef,°C
-3
-5
+1
+3
0
0
-3
0
Tefs,°C
-3
-5
+1
+3
0
0
-3
0
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
+1
-1
+3
+4
-1
-3
-3
-2
Atmospheric pressure
659
660
661
661
659
659
659
659
Wind
SW
3 m/s
3 m/s
SW
2 m/s
2 m/s
SW
3 m/s
3 m/s
W
3 m/s
3 m/s
S
1 m/s
1 m/s
S
1 m/s
1 m/s
calm
E
1 m/s
1 m/s
Precipitation, mm
0.0
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Tef,°C
-2
-4
0
+2
-1
-4
-2
-2
Tefs,°C
-2
-4
+1
+4
-1
-4
-2
-2
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
-2
-2
+2
+4
-1
-3
-4
Atmospheric pressure
659
660
661
662
661
661
661
Wind
calm
calm
E
1 m/s
1 m/s
S
2 m/s
2 m/s
SW
1 m/s
1 m/s
S
1 m/s
1 m/s
SW
1 m/s
1 m/s
Precipitation, mm
0.0
0.0
0.0
0.0
0.0
0.0
0.0
Tef,°C
-2
-2
+2
+3
-1
-3
-5
Tefs,°C
-2
-2
+3
+4
-1
-3
-5
Weather comfort
- Sat, 21.12
- Sun, 22.12
- Mon, 23.12
Location of a geographical point Helena (Montana, USA):
latitude 46.6056 longitude -111.9636 height above sea level 1167 m.
Navigation:
- Weather forecast Helena for 3 days
- Weather forecast Helena for a week
- Weather forecast Helena for 14 days
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.