Climate Insights for Nanaimo

The climate in Nanaimo is temperate. The average annual temperature is 10°C and approximately 1796mm of precipitation falls per year. Nanaimo receives a notable amount of rainfall throughout the year, including during its driest month. Nanaimo is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are February, December, January, when temperatures can drop to 2°C. Snowfall occurs from January to December, with around 141cm accumulating over the season.

Nanaimo sees moderate temperature variation throughout the year, ranging from 2°C to 21°C. August is the warmest month, though highs remain moderate at 21°C with a mean of 18°C. February is the coolest month, with minimum temperatures around 2°C and an average of 4°C. Daily temperature variation is modest, with an average difference of 4°C between highs and lows. The sharpest temperature change occurs between September and October, with a 5°C shift in average temperatures.

Nanaimo is a fairly wet location, receiving approximately 1796mm of precipitation annually, which averages out to around 150mm per month. The wettest month is January, averaging 293mm of rainfall. November and December also tend to see above-average precipitation. The driest month is July, with just 40mm. That's 253mm less than January, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic. Snowfall is a regular feature from January to December, with around 141cm accumulating over the season. February typically sees the most snow at around 38cm.

Nanaimo is relatively calm, with an average annual wind speed of 3km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.

It is currently summer in Nanaimo, which began on June 21, 2026. Nanaimo is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 21°C, while the coldest stretch bottoms out in February near 2°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.

The best time to visit Nanaimo is during July and August, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 41mm per month. By contrast, February can be quite cold with temperatures dropping to 2°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Nanaimo based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.