The Icefields Parkway is one large section of the main highway that runs north/south up thru Jasper NP. The day we drove north on it we had rain all day except for two periods when we drove in snow. Our rental car read the outside temperature in Celsius and we had no idea what the ratio was to Fahrenheit, but the lowest it got down to (twice) was "-.05 C". We later discovered that equaled 31 degrees F.