Monday, February 11, 2013. Viewing the canyon from Mather Point on the South Rim as a storm breaks. To follow current Grand Canyon weather forecasts and road conditions visit: go.nps.gov/grca_wr Winter conditions on the South Rim can be extreme. Be prepared for snow, icy roads and trails, and possible road closures at any time. Winter weather typically begins by November and becomes well entrenched by December and January, with frequent light to moderate snows and increasingly colder weather. Low temperatures are generally in the teens along the Rim; however afternoon high temperatures still average in the 40s (4-9°C), due to the amount of sunshine the area receives. Along the river, cold air typically becomes trapped in the canyon leading to high temperatures only in the 40s and 50s (4-15°C) and low temperatures in the 30s and 40s (-1C-+9°C). NPS Photo by Michael Quinn.
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