Partly Sunny. It is 26 degrees fahrenheit, or -3 degrees celsius and feels like 21 degrees fahrenheit. Oregon State Weather. 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. Calendar overview of Months Weather Forecast. 2443 Mount Shasta. Calendar overview of Months Weather Forecast. Toggle navigation. Mostly Sunny. The barometric pressure is 30.19 - measured by inch of mercury units - and is rising since its last observation. 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. Free Long Range Weather Forecast for Siskiyou Mountain Park, Oregon January 2021. Enter any city, zip or place. Updated Oregon State weather maps. Slight chance of rain in the late morning and early Afternoon, then chance of rain and snow late this afternoon. Be prepared with the most accurate 10-day forecast for Mount Shasta, CA with highs, lows, chance of precipitation from The Weather Channel and Toggle navigation. United States; CA; Siskiyou County; 2242 Yreka. See the forecast as a table or graph. Partly Sunny. Highs in the mid 40s to lower 50s. Weather forecasts for all towns and cities in Oregon State Free Long Range Weather Forecast for Siskiyou Mountain Park, Oregon. 2343 Weed. 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. 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. . Todays weather forecast, by the hour and long term. 2545 Happy Camp. Snow level 6000 feet this afternoon. Weather Bureau: (530) 221-5613; Cal Trans: (800) 427-7623; Oregon Roads: (503) 588-2941; Snow Chain Requirements. Nov December 2020 . Siskiyou County Weather Forecast. Chains must be carried by vehicles using snow tires. Today 21 Dec Western Siskiyou County. WeatherTAB Siskiyou Mountain Park, Oregon Help °C °F. 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.