Climate Chart of Trondheim, Norway

Climate overview

Temperature

The coolest monthly mean is -2.4 °C in January, while the warmest is 15.3 °C in July. These are averages for whole months, not daytime highs, so they should not be read as a forecast or as the range visitors will experience on an individual day. Across the calendar-month means, the unweighted mean temperature is 5.9 °C. This provides a broad annual reference, rather than a day-weighted average or a description of how temperatures change from one day to the next.

Rain

Mean daily rainfall is lowest in February at 1.19 mm/day, and highest in September at 4.23 mm/day. These figures describe average daily amounts within each month, not monthly totals; the lower monthly mean does not guarantee rain-free days or indicate how often rain occurs. The unweighted mean of the monthly daily-rainfall means is 2.61 mm/day. It gives a compact reference across the calendar months, but does not show the timing or intensity of individual showers.

Sunshine

Average daily sunshine reaches its highest monthly mean in June at 11.03 hours/day, and its lowest in December at 0.85 hours/day. These are sunshine-duration averages, not measures of day length or a promise of uninterrupted sunshine. The unweighted mean across the monthly sunshine means is 6.49 hours/day per day. It is a broad summary, while actual sunshine can vary from day to day.

Snow

Mean daily snowfall reaches its highest monthly mean in February at 11.02 mm/day. The unweighted mean across the monthly snowfall means is 4.54 mm/day per day. These averages do not establish how many days have snow, its depth or duration of cover, or whether conditions suit skiing.