June weather forecast
Trondheim, Norway

June signals the start of summer in Trondheim, with temperatures on a steady rise from 8°C (46.4°F) to 16°C (60.8°F). Oddly enough, June ushers in almost as much rainfall as the wetter winter months, resulting in a fairly humid summer atmosphere. Despite the heavier rainfall, the longest days of the year also occur in June, with daylight hours surpassing the 20-hour mark. Evenings are spent lounging by the shores of the Trondheim Fjord, enjoying the longer daylight hours. The weather does not waver significantly during the course of the month, maintaining a steady, almost predictable, pattern.

Temperature

June sees a marginal temperature increase, moving from a cool 12°C (53.6°F) in May to a comfortable 16°C (60.8°F). An average low-temperature of 8°C (46.4°F) is noted during the nights in June in Trondheim.

Rainfall

In Trondheim, in June, during 17 rainfall days, 70mm (2.76") of precipitation is typically accumulated. In Trondheim, Norway, during the entire year, the rain falls for 239 days and collects up to 1096mm (43.15") of precipitation.

Sea temperature

In Trondheim, in June, the average water temperature is 12.3°C (54.1°F).
Note: It is life-risking to swim in 12.3°C (54.1°F). Briefly staying in 13°C (55.4°F) waters feels unsettling, and temperatures below 10°C (50°F) might result in cold shock and loss of breath control, hinging on personal endurance.

Daylight

June has the longest days of the year, with an average of 20h and 24min of daylight.
On the first day of the month, sunrise is at 03:23 and sunset at 23:09. On the last day of June, sunrise is at 03:10 and sunset at 23:33 CEST.

Sunshine

May and June, with an average of 7h of sunshine, are months with the most sunshine in Trondheim.

UV index

The months with the highest UV index are June and July, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: An average maximum UV index of 4 in June leads to these recommendations:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.