Weather Report
West Yellowstone, Montana
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Current Conditions -  °F | °C
As of 5:55 AM on Monday 20 May 2013 (Local Time) from KWYS Reporting Station
Overcast Overcast   Feels Like: 2°
Wind Chill:   Ceiling: 3800
Heat Index:   Visibility: 10mi
Dew Point:   Wind: 3mph
Humidity: 81%   Direction: 180° (S)
Pressure: 30.16"   Gusts: NA
Report Text: KWYS 201155Z AUTO 18003KT 10SM BKN038 OVC050 03/00 A3016 RMK AO2
7 AM
R/S Showers
R/S Showers
8 AM
Few Showers
Few Showers
9 AM
Few Showers
Few Showers
Alerts
Interactive Weather Map
10 Day Forecast -  °F | °C
mon tue wed thu fri sat sun mon tue wed
may
20
Sct T-Storms
Sct T-Storms
13°
-1°
may
21
P Cloudy
P Cloudy
16°
may
22
Iso T-Storms
Iso T-Storms
17°
may
23
Iso T-Storms
Iso T-Storms
17°
may
24
Iso T-Storms
Iso T-Storms
13°
may
25
P Cloudy
P Cloudy
18°
may
26
P Cloudy
P Cloudy
19°
may
27
P Cloudy
P Cloudy
17°
may
28
M Cloudy
M Cloudy
15°
may
29
Cloudy
Cloudy
17°
Details for Monday, May 20
A few showers early, followed by isolated thunderstorms during the afternoon. High around 55F. Winds N at 10 to 15 mph. Chance of rain 40%.
Evening: Partly cloudy skies. Chance of a shower or thunderstorm through the evening. Low around 30F. Winds NE at 5 to 10 mph.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 69%
Relative Humidity
Precipitation: 40%
Probability of Precipitation
Snow: 19%
Snow
Cloud Coverage: 59%
Cloud Coverage
Sunrise: 5:51 AM
Sunset: 8:52 PM
 
Moonrise: 3:52 PM
Moonset: 3:00 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  N
Direction: N (5°)
Speed: 12Mph(20Km, 10Kts)
Details for Tuesday, May 21
Intervals of clouds and sunshine. A stray shower or thunderstorm is possible. High 61F. Winds SSE at 10 to 15 mph.
Evening: Isolated thunderstorms during the evening, then mainly cloudy overnight. Low 34F. Winds ESE at 5 to 10 mph. Chance of rain 30%.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 48%
Relative Humidity
Precipitation: 30%
Probability of Precipitation
Snow: 13%
Snow
Cloud Coverage: 34%
Cloud Coverage
Sunrise: 5:50 AM
Sunset: 8:53 PM
 
Moonrise: 5:02 PM
Moonset: 3:29 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  SSE
Direction: SSE (154°)
Speed: 11Mph(18Km, 9Kts)
Details for Wednesday, May 22
Partly cloudy with a stray thunderstorm. Highs in the low 60s and lows in the mid 30s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 60%
Relative Humidity
Precipitation: 30%
Probability of Precipitation
Snow: 5%
Snow
Cloud Coverage: 59%
Cloud Coverage
Sunrise: 5:49 AM
Sunset: 8:54 PM
 
Moonrise: 6:14 PM
Moonset: 4:02 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  SSE
Direction: SSE (156°)
Speed: 13Mph(21Km, 11Kts)
Details for Thursday, May 23
Slight chance of a thunderstorm. Highs in the low 60s and lows in the low 30s.
UV Index: 7 (High)
Ultraviolet Radiation Index
Relative Humidity: 62%
Relative Humidity
Precipitation: 30%
Probability of Precipitation
Snow: 6%
Snow
Cloud Coverage: 66%
Cloud Coverage
Sunrise: 5:48 AM
Sunset: 8:55 PM
 
Moonrise: 7:28 PM
Moonset: 4:40 AM
Moon Phase:  Waxing Gibbous
Moonphase:
Waxing Gibbous
Wind Direction:  SSW
Direction: SSW (204°)
Speed: 8Mph(13Km, 7Kts)
Details for Friday, May 24
Partly cloudy with a stray thunderstorm. Highs in the mid 50s and lows in the low 30s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 63%
Relative Humidity
Precipitation: 30%
Probability of Precipitation
Snow: 2%
Snow
Cloud Coverage: 36%
Cloud Coverage
Sunrise: 5:47 AM
Sunset: 8:56 PM
 
Moonrise: 8:40 PM
Moonset: 5:24 AM
Moon Phase:  Full
Moonphase:
Full
Wind Direction:  S
Direction: S (188°)
Speed: 14Mph(23Km, 12Kts)
Details for Saturday, May 25
Times of sun and clouds. Highs in the mid 60s and lows in the mid 30s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 55%
Relative Humidity
Precipitation: 10%
Probability of Precipitation
Snow: 1%
Snow
Cloud Coverage: 32%
Cloud Coverage
Sunrise: 5:47 AM
Sunset: 8:57 PM
 
Moonrise: 9:48 PM
Moonset: 6:18 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  S
Direction: S (191°)
Speed: 12Mph(20Km, 10Kts)
Details for Sunday, May 26
Mix of sun and clouds. Highs in the mid 60s and lows in the mid 30s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 59%
Relative Humidity
Precipitation: 10%
Probability of Precipitation
Snow: 3%
Snow
Cloud Coverage: 52%
Cloud Coverage
Sunrise: 5:46 AM
Sunset: 8:58 PM
 
Moonrise: 10:47 PM
Moonset: 7:20 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  S
Direction: S (190°)
Speed: 9Mph(15Km, 8Kts)
Details for Monday, May 27
Times of sun and clouds. Highs in the low 60s and lows in the mid 30s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 60%
Relative Humidity
Precipitation: 10%
Probability of Precipitation
Snow: 1%
Snow
Cloud Coverage: 39%
Cloud Coverage
Sunrise: 5:45 AM
Sunset: 8:59 PM
 
Moonrise: 11:37 PM
Moonset: 8:28 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  SSW
Direction: SSW (200°)
Speed: 9Mph(15Km, 8Kts)
Details for Tuesday, May 28
Considerable cloudiness. Highs in the upper 50s and lows in the upper 30s.
UV Index: 8 (Very High)
Ultraviolet Radiation Index
Relative Humidity: 65%
Relative Humidity
Precipitation: 10%
Probability of Precipitation
Snow: 0%
Snow
Cloud Coverage: 62%
Cloud Coverage
Sunrise: 5:44 AM
Sunset: 9:00 PM
 
Moonrise: 11:59 PM
Moonset: 9:41 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  SSW
Direction: SSW (202°)
Speed: 8Mph(13Km, 7Kts)
Details for Wednesday, May 29
Cloudy. Highs in the low 60s and lows in the upper 30s.
UV Index: 5 (Moderate)
Ultraviolet Radiation Index
Relative Humidity: 61%
Relative Humidity
Precipitation: 20%
Probability of Precipitation
Snow: 3%
Snow
Cloud Coverage: 80%
Cloud Coverage
Sunrise: 5:44 AM
Sunset: 9:00 PM
 
Moonrise: 12:19 AM
Moonset: 10:54 AM
Moon Phase:  Waning Gibbous
Moonphase:
Waning Gibbous
Wind Direction:  SSW
Direction: SSW (204°)
Speed: 8Mph(13Km, 7Kts)
Chart.
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