The highest day temperature in June 2025 was 74°F. The lowest night temperature was 39°F. The average values for day and night temperatures during June were 59.0°F и 49.9°F respectivly.

The average sea surface temperature in June 2025 for St. John's was 43.7°F. The maximum and minimum values were 36.8°F and 47.2°F respectively.

Most of the days in June are gloomy but you can also expect sunny days.

Precipitation total in June for St. John's is 1.7 in.

The average wind speed in June is 10.7 mph. It makes June one of the most windless months of the year for St. John's.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for St. John's in June is 6.1 hours.