Vancouver and Seattle have a warm and temperate climate with Vancouver having an average temperature of 9.9 °C and annual rainfall of 1283 mm, and Seattle having a temperature of 10.9 °C and rainfall of 969 mm, while Kamloops has a steppe climate with average temperature of 8.6 °C and annual rainfall of 305 mm.
Banff, Vernon and Salmon Arm have a cold and temperate climate with Banff having an average temperature of 1.8 °C and annual rainfall of 511 mm, while Vernon have a temperature of 6.1 °C and rainfall of 882 mm, and Salmon Arm’s temperature is 7.4 °C and rainfall 569 mm.
The seasons in Banff, Vernon and Salmon Arm are as follow:
- Spring –April to May are months when there is an abundance of wildflowers at Vernon and Salmon Arm. Banff’s weather is unpredictable and everything from blizzards to warm weather can be experienced during this season.
- Summer –June to August is the period when the mountain lakes at Banff look their most brilliant.July is the hottest month of the year at Banff, Vernon and Salmon Arm.
- Autumn –September to October is when temperatures cool and beautiful fall colours arrive. Do pack warm layers to protect you from the cooling weather. Blizzards are common in Banff in October as it can quickly turn bitterly cold within the month.
- Winter –November to March are months when the temperatures become freezing. Do pack more layers and a winter jacket. January is the coldest month of the year.
The seasons in Kamloops and Vancouver are as follow:
- Spring – March to May are months when temperatures are mild with a mix of sunshine and rain.
- Summer – June to August is the peak tourist season, with July being the hottest month of the year. Kamloops may experience the occasional rainstorm with relatively low humidity.
- Autumn –September to November is a period of mild to cool temperatures. Early autumn may still be warm, but it can get rather cold by the end of autumn. It is recommended to pack more layers.
- Winter –December to February may be cold and snowy months, but Kamloops, Vancouver and Seattle differ in that Kamloops enjoy mainly sunny yet windy days, while Vancouver and Seattle have frequent rain showers which may hinder sightseeing plans. Do pack more layers and a winter jacket. January is the coldest month of the year.