Partly Sunny. Todays weather forecast, by the hour and long term. Weather Bureau: (530) 221-5613; Cal Trans: (800) 427-7623; Oregon Roads: (503) 588-2941; Snow Chain Requirements. The barometric pressure is 30.19 - measured by inch of mercury units - and is rising since its last observation. Siskiyou County Weather Forecast. Slight chance of rain in the late morning and early Afternoon, then chance of rain and snow late this afternoon. The current weather report for Siskiyou Pass CA, as of 2:56 AM PST TUE DEC 29 2020, has a sky condition of Fair with the visibility of 10.00 miles. Highs in the mid 40s to lower 50s. Oregon State Weather. 2443 Mount Shasta. 2343 Weed. See the forecast as a table or graph. Free Long Range Weather Forecast for Siskiyou Mountain Park, Oregon. Partly cloudy in the late morning and early afternoon then becoming mostly cloudy. Hourly weather forecast in Siskiyou for the next 15 days: temperature, precipitation, cloud cover, rain, snow, wind, humidity, pressure, fog, sun, thunder, uv index. Today 21 Dec Western Siskiyou County. Be prepared with the most accurate 10-day forecast for Mount Shasta, CA with highs, lows, chance of precipitation from The Weather Channel and Weather.com Partly Sunny. The 7 day weather forecast summary for Siskiyou Summit: Over the next 7 days the Siskiyou Summit forecast suggests the average daytime maximum temperature will be around 2°C, with a high for the week of 4°C expected on the afternoon of Sunday 3rd. Partly Sunny. Chains must be carried by vehicles using snow tires. WeatherTAB Siskiyou Mountain Park, Oregon Help °C °F. . It is 26 degrees fahrenheit, or -3 degrees celsius and feels like 21 degrees fahrenheit. Free Long Range Weather Forecast for Siskiyou Mountain Park, Oregon January 2021. Snow level 6000 feet this afternoon. Toggle navigation. Calendar overview of Months Weather Forecast. Mostly Sunny. Weather forecasts for all towns and cities in Oregon State R1 - Chains are required on all vehicles except passenger vehicles and light-duty trucks under 6,000 pounds gross weight and equipped with snow tires on at least two drive wheels. Updated Oregon State weather maps. 2545 Happy Camp. Calendar overview of Months Weather Forecast. United States; CA; Siskiyou County; 2242 Yreka. Nov December 2020 . The Siskiyou Mountains are a coastal subrange of the Klamath Mountains, and located in northwestern California and southwestern Oregon in the United States.They extend in an arc for approximately 100 miles (160 km) from east of Crescent City, California, northeast along the north side of the Klamath River into Josephine and Jackson counties in Oregon. Toggle navigation. Enter any city, zip or place.