Environment Canada consistently recognizes Nanaimo as one of the mildest climate regions in the country, for its above-zero temperatures through fall and winter, and comfortably warm weather in spring and summer.
Nanaimo's coldest months, between November and February, typically have daytime high temperatures in the 6 to 9 degrees celsius range, and lows of about 0 to 2 degrees celsius. The summer months between June and September have average daytime highs in the mid-20s celsius, and lows of about 10. With dependable temperatures like that eight months of the year, it's no surprise that Environment Canada has taken notice.
Nanaimo's rainy season reaches its peak in November and December, months where the city averages more than 170 millimetres of rain. Precipitation falls off slowly through late winter and spring, and reaches its low point in July and August, when there is typically less than 30 millimetres of rainfall per month.
Nanaimo's short snow season peaks in late December and January, with an average of five snowfalls totalling 30 centimetres in each month.
