The Skull Valley South Cooperative Wildlife Management Unit (CWMU) is located in Tooele County in Skull Valley west of the Stansbury Mountains. The CWMU is about 22.5 km southwest of Timpie, Utah. Elevations in the east are around 5600 feet and 4300 feet in the west.The Skull Valley South Cooperative Wildlife Management Unit land cover is dominated by Invasive Annual Grassland (121), about 35%. This invasive is evident throughout the unit. In the northwest of the CWMU is mostly Inter-Mountain Basins Geasewood Flat (82), 15%. Down the middle of the CWMU are six patches of Agriculture (114) land, 12%. Finally, towards the southwest are patches of Inter-Mountain Basins Mixed Salt Desert Scrub (58), 11%.One of the Skull Valley South Cooperative Wildlife Mangement Unit (CWMU) nearest weather stations, IOSEPA SOUTH RANCH (424233), is near the middle of the CWMU. IOSEPA SOUTH RANCH has thirty-five (35) years of records, 1910 - 1958. During the FALL (September, October and November) the average precipitation is 1.61 inches, but it can be as high as 2.76 inches or as low as 0.35 inches. During the 91-day FALL period, 7 days will experience greater than or equal to 0.01 inch of precipitation, 5 days of greater than or equal to 0.10 inch, or 1 day of the greater than or equal to 0.50 inch of precipitation. Snowfall during the FALL averages 1.0 inch but can be as high as 5.5 inches. FALL temperature at IOSEPA SOUTH RANCH averages 50.5 degrees F. but can be as high as 109.0 degrees F. or as low as -9.0 degrees F. During the FALL, 43 days will be below freezing (32 degrees F.) and 10 days above 90 degrees F.