Casper, Wyoming
Current Conditions
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Almanac
Average High: 40°
Average Low: 19°
Record high/year: 61° (1989)
Record low/year: -16° (1947)
Sunrise: 7:05 AM
Sunset: 4:37 PM
Detailed History
Sun and Moon
Sunrise: 07:05 AM (MST)
Moon Rise: 11:14 AM (MST) 11 21
Sunset: 04:37 PM (MST)
Moon Set: 08:53 PM (MST) 11 21
Moon Phase
Next 12 Hours
Partly Cloudy
Partly Cloudy
Clear
Clear
Partly Cloudy
Forecast data from the National Digital Forecast Database
5-Day Forecast
Hi 54°
Lo 20°
Partly Cloudy
Hi 47°
Lo 20°
Partly Cloudy
Hi 36°
Lo 18°
Partly Cloudy
Hi 41°
Lo 25°
Partly Cloudy
Hi 49°
Lo 27°
Partly Cloudy
Forecast for Natrona County Lower Elevations
Tonight
Partly cloudy in the evening then clearing. Lows 19 to 22. Southwest winds around 15 mph.
Sunday
Breezy. Partly cloudy in the morning then becoming mostly cloudy. Highs 42 to 46. Southwest winds 15 to 25 mph with gusts to around 40 mph.
Sunday Night
Breezy. Mostly cloudy with a 20 percent chance of snow. Lows 19 to 22. West winds 15 to 20 mph.
Monday
Breezy. Mostly cloudy in the morning then becoming partly cloudy. A 20 percent chance of snow showers. Highs 33 to 36. West winds 15 to 20 mph.
Monday Night
Partly cloudy. Lows 16 to 19. West winds around 15 mph after midnight.
Tuesday
Breezy. Not as cool. Partly cloudy. Highs in the lower to mid 40s.
Tuesday Night
Partly cloudy. Lows in the lower to mid 20s.
Wednesday
Partly cloudy. Highs in the mid 40s to lower 50s.
Wednesday Night
Mostly clear. Lows in the 20s.
Thanksgiving Day
Mostly sunny. Highs near 50.
Thursday Night
Breezy. Mostly clear. Lows in the mid to upper 20s.
Friday
Breezy. Partly cloudy. Highs in the lower 50s.
Friday Night
Breezy. Partly cloudy. Slight chance of rain and snow in the evening...then slight chance of snow after midnight. Lows near 30. Chance of precipitation 20 percent.
Saturday
Partly cloudy. Slight chance of snow in the morning... then slight chance of rain and snow in the afternoon. Highs near 40. Chance of precipitation 20 percent.
Personal Weather Stations
Personal Weather Stations [Add your weather station!]
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Location: HADS NORTH PLATTE RIVER AT CASPER WY US USBR, Casper, WY Updated: 4:30 PM MST |
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| Temperature: 45 °F | Dew Point: - | Humidity: - | Wind: Calm | Pressure: - | Hourly Precipitation: 0.00 in | Windchill: 45 °F | Historical Graphs |
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Location: CY Ave, Casper, WY Updated: 4:59 PM MST |
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| Temperature: 44.4 °F | Dew Point: 14 °F | Humidity: 29% | Wind: NNW at 8.0 mph | Pressure: 30.71 in | Hourly Precipitation: 0.00 in | Windchill: 40 °F | Historical Graphs |
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Location: Valley Hills / Sunrise area, Casper, WY Updated: 5:20 PM MST |
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| Temperature: 42.1 °F | Dew Point: 18 °F | Humidity: 37% | Wind: NNW at 14.0 mph | Pressure: 29.43 in | Hourly Precipitation: 0.00 in | Windchill: 35 °F | Historical Graphs |
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Location: North of Casper, WY, Bar Nunn, WY Updated: 5:23 PM MST |
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| Temperature: 38.8 °F | Dew Point: 15 °F | Humidity: 37% | Wind: WSW at 11.1 mph | Pressure: 29.55 in | Hourly Precipitation: 0.00 in | Windchill: 32 °F | Historical Graphs |
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Location: MesoWest CASPER MTN. WY US SNOTEL, Casper, WY Updated: 4:00 PM MST |
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| Temperature: 33 °F | Dew Point: - | Humidity: - | Wind: Calm | Pressure: - | Hourly Precipitation: 0.00 in | Windchill: 33 °F | Historical Graphs |
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Location: RAWS CASPER MOUNTAIN WY US, Casper, WY Updated: 4:52 PM MST |
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| Temperature: 32 °F | Dew Point: 10 °F | Humidity: 39% | Wind: WSW at 9 mph | Pressure: - | Hourly Precipitation: 0.00 in | Windchill: 24 °F | Historical Graphs |
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Location: MesoWest RENO HILL WY US SNOTEL, Evansville, WY Updated: 4:00 PM MST |
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| Temperature: 32 °F | Dew Point: - | Humidity: - | Wind: Calm | Pressure: - | Hourly Precipitation: 0.00 in | Windchill: 32 °F | Historical Graphs |
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Location: WYDOT Deer Creek I-25 east of Casper, Glenrock, WY Updated: 5:00 PM MST |
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| Temperature: 43 °F | Dew Point: 11 °F | Humidity: 26% | Wind: WSW at 12 mph | Pressure: - | Hourly Precipitation: 0.00 in | Windchill: 37 °F | Historical Graphs |
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MSN Maps of: |
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| Temperature | Dew Point | Humidity | Wind | Pressure | Hourly Precipitation | - | |
NWS Forecaster Discussion
139 fxus65 kriw 212214 afdriw Area forecast discussion National Weather Service Riverton Wyoming 314 PM MST Sat Nov 21 2009 Short term...tonight through Tuesday First wave of the split trough moved through by middle morning with an inch or two of snowfall over the far West Mountains and valleys. Second shortwave moving across late this morning and middle afternoon with some light snow falling mainly in the western mountains. The snow will be ending here in the early to middle evening hours as the wave moves through and shortwave ridge builds in. Had some borderline high winds around Casper and southeast Fremont County. Winds are still quite windy over Natrona and southeast Fremont. The winds will taper some in the evening and in the overnight hours before picking back up again as the next system approaches. This next system currently moving quickly towards the Pacific northwest. This system will move on shore after midnight and begin to spread moisture into the west shortly before noon. This as the nose of cyclonically curved jet moves across southern Idaho and into western Wyoming. The jet digs southeast into SW Wyoming and into NE Utah and northwest Colorado in the afternoon and evening. Cold front moves through in the late afternoon and early evening...with the snowfall winding down to mainly the mountains. This will bring a 6 to 9 hour period of snowfall of perhaps 0.5 inch per hour snowfall rates in the western mountains. Light snow showers will likely persist in the western mountains...possibly in the valleys. Meanwhile northwest winds will increase in the evening over areas east of The Divide...and even the Upper Green basin. 700 mb wave moves through north central Wyoming Sunday night as well...bringing a decent chance of snow to the north and eastern bighorns and to Johnson County. The northwest flow continues over the County Warning Area Monday...with some lingering snow showers. Things stabilize and dry out in the afternoon. Northwest winds to persist Monday as well then tapering in the evening as the trough departs. Large ridge builds in over the Great Basin Tuesday with a clipper moving southeast from the Alberta/Saskatchewan region of Canada. Some light snow will approach far northern Wyoming. As a strong jet on the base of the clipper digs into central Montana. 700 mb temperatures of -15c moves into the west tonight and -10c or so over the central. With clear patches overnight the far west valleys such as the Upper Green could drop into the single digits and close to zero. Expect these near zero temperatures to be more likely Sunday night with even some sub zero temperatures. Long term...Tuesday night through Saturday Dry conditions with a warming trend are expected Tuesday night through Thanksgiving day. The next Pacific storm system will bring a chance of snow to the west Friday and cooler conditions with chances of snow across central Wyoming Friday night and Saturday. Latest European model (ecmwf) showing a solution similar to last few Gem runs with a clipper diving down front side of intermountain west upper ridge into backside of upper low over upper Mississippi Valley Tuesday and Tuesday night...keeping system well north and east of Wyoming. GFS...showing a stronger clipper diving into the northern plains...is also trending in this direction. Forecast sides with European model (ecmwf) and Gem resulting in a dry forecast Tuesday with high temperatures around 10f warmer than Monday...or upper 30s to near 50 most basins and valleys. Upper ridge expands across area Wednesday and Thanksgiving day with dry and unseasonably mild high temperatures though valley inversions will continue to keep temperatures 10f-15f below full mixing potential as has been the case with the last few days of clear skies/light wind. Nighttime lows will be more near normal with good radiational cooling. Model spread increases Friday and Saturday with GFS continuing to handle split flow of last few weeks poorly...too far north and too progressive with incoming Pacific energy. European model (ecmwf) splits next Pacific system along West Coast Friday morning with most of this energy diving into the Great Basin Friday night. European model (ecmwf) is likely not progressive enough...holding a closed low back over Arizona/nm into Sunday. Forecast brings in chances of precipitation into the west Friday...spreading east of The Divide Friday night and Saturday along with cooler temperatures more near seasonal normals. && Aviation... VFR to MVFR conditions are expected west of The Divide with isolated snow showers continuing through approximately 06z sun. Expect mainly local mountain top obscuration through this same time. East of the Continental Divide...VFR conditions continue through 18z Sunday. Locally strong southwest wind from 20 to 30kts with gusts to 50kts is possible between 09z-14z Sunday vicinity of kcod. && Fire weather... Another trough will approach for Sunday bringing another round of snow in the west in the afternoon and evening. Winds will also be on the increase with areas of strong winds in the typical spots. Northwest winds will increase in the evening east of The Divide and the Upper Green basin Sunday evening and persist through Monday. Light snow showers will dissipate Monday as high pressure builds in. Another system could clip the northeast Tuesday night with some light snow. Otherwise dry and milder conditions expected through the upcoming week. && Riw watches/warnings/advisories... none. && $$ Short term...twb long term...aem aviation...church fire weather...twb