The highest day temperature in July 2026 was 92°F. The lowest night temperature was 51°F. The average values for day and night temperatures during July were 73.8°F и 57.6°F respectivly.

The average sea surface temperature in July 2026 for Saint John was 55.0°F. The maximum and minimum values were 50.8°F and 62.0°F respectively.

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

Precipitation total in July for Saint John is 1.4 in. It makes july one of the most rainy months of the year.

The average wind speed in July is 6.3 mph. It makes July one of the most windless months of the year for Saint John.

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 Saint John in July is 6.5 hours.