Climate Chart of Sapporo, Japan

Climate overview

Temperature

Monthly mean temperatures are lowest at -6.0 °C in January and highest at 21.5 °C in August. These are averages for each month, not daytime highs, so they describe the broad temperature pattern rather than the warmth visitors can expect at a specific time of day. The unweighted mean of the monthly temperature means is 7.9 °C. It provides a compact summary across the calendar months, but should not be read as a day-weighted annual average or as a typical temperature for every month.

Snow

Mean daily snowfall is highest at 18.12 mm/day in January. The unweighted mean of the monthly daily-snowfall means is 5.67 mm/day. These amounts do not establish the number of snowy days, snow depth or snow cover, and are not enough to assess skiing conditions.

Rain

Mean daily rainfall reaches its monthly high of 5.94 mm/day in August, while the lowest monthly mean is 0.17 mm/day in January. The figures describe average daily amounts, not monthly totals; the lower average does not guarantee rain-free days or indicate how frequently rain occurs. Across the calendar months, the unweighted mean of the monthly daily-rainfall means is 2.69 mm/day. This summary gives context for the recorded pattern, but does not describe the amount expected on any individual day.

Sunshine

Mean daily sunshine is highest at 9.99 hours/day in July and lowest at 5.39 hours/day in December. These averages can help with broad outdoor-planning comparisons, but sunshine duration is not the same as day length and does not guarantee clear skies on a particular date. The unweighted mean of the monthly daily-sunshine means is 7.98 hours/day, a year-wide summary rather than a promise of consistent sunshine from day to day.