Climate Chart of St. John's, Canada

Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023

Climate overview

Temperature

The monthly mean temperature is lowest in February, at -3.0 °C, and reaches its high in August at 17.1 °C. The unweighted mean of the monthly means is 6.1 °C. These figures describe average temperatures for each month, not daytime highs; conditions on individual days can differ from the monthly pattern.

Rain

Mean daily rainfall is lowest in March, at 1.66 mm/day, and highest in September, at 3.95 mm/day. The unweighted mean across monthly daily means is 2.77 mm/day. These are daily averages, not monthly rainfall totals, and they do not show how often rain falls or guarantee dry weather in the lower-mean month.

Sunshine

Mean daily sunshine reaches its highest level in July, at 9.07 hours/day, and its lowest in December, at 3.02 hours/day. The unweighted mean of the monthly sunshine means is 6.21 hours/day. Sunshine duration can help with broad outdoor planning, but it is not the same as day length and does not promise clear skies on a particular day.

Snow

The highest monthly mean daily snowfall is recorded in January, at 19.32 mm/day; the unweighted mean of monthly daily snowfall means is 6.38 mm/day. These amounts do not establish the number of snowy days, snow depth or snow cover, so they should not be used alone to judge conditions for winter activities.

Best Travel Time Guide for St. John's, Canada: Ideal Seasons and Weather Insights

For visitors prioritising lower average rainfall, March is a conditional option: mean daily rainfall is 1.66 mm/day. This is not a guarantee of dry days or a measure of rain frequency, so keep plans flexible and bring suitable rain protection. The highest mean daily rainfall is in September, at 3.95 mm/day, a useful consideration when preparing for outdoor time. Those seeking cooler monthly averages can use February as a reference, when the monthly mean temperature is -3.0 °C; it is not a prediction of daytime highs or the weather on a specific date. For daylight outdoor planning, mean daily sunshine is highest in July at 9.07 hours/day, and lowest in December at 3.02 hours/day. Sunshine hours are not day length, and neither statistic guarantees the conditions for an individual outing.

The recorded snowfall’s highest monthly mean daily amount occurs in January, at 19.32 mm/day. It describes an average amount, not how many days have snow or whether snow cover will be present, so it cannot establish skiing conditions. Consider checking a short-range forecast close to travel and packing for variable weather.

Climate Data Overview for St. John's, Canada

Explore the comprehensive climate data for St. John's, Canada. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.

• See also climate change in St. John's
• Explore the climate in Canada