August Weather in Saint John

Last updated: March 2, 2024

The weather in Saint John, United States, during August is characterized by an average temperature of 25°C (76°F). Highs can soar to 34°C (94°F), while lows may dip to 15°C (58°F). Typically, the humidity level in Saint John throughout August hovers around 80%.

15°C (58°F)

Minimum temperature

25°C (76°F)

Average temperature

34°C (94°F)

Maximum temperature

80%

Humidity

Precipitation and Sunshine hours

In August, Saint John averages 130 mm (5.1 inches) of rainfall, typically over the course of 11 rainy days. The month enjoys an average of 13 hours 35 minutes of daylight, with the sun shining for approximately 10 hours 37 minutes each day. Additionally, there is a 47% probability of sunny days during this period.

130 mm (5.1 inches)

Precipitation

11 rainy days

Rainy days

10 hours 37 minutes

Sunshine hours

47%

Chance of sun

UV Index

In August, the UV Index in Saint John reaches a maximum of 10, indicating a level of VeryHigh exposure. The most intense UV radiation typically occurs between 12:00 and 14:00, during which unprotected skin may burn in as little as 15 minutes.

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
  07:00 08:00 09:00 10:00 11:00 12:00 13:00 14:00 15:00 16:00 17:00 18:00 19:00
UVI 1 2 3 5 7 9 9 9 7 5 3 1 1
Exposure Low Moderate High VeryHigh High Moderate Low
Time to burn 45 min 30 min 25 min 15 min 25 min 30 min 45 min

Compare Saint John's Climate with Cities Worldwide