Weather in Saint John in August

General weather information about Saint John

Average annual temperature is 14.4 °C

Absolute maximum temperature: 40.9 °C

Absolute minimum temperature: -14.5 °C

Number of sunny days: 238 days

Number of rainy days: 120 days

Number of snow days: 7 days

* Weather data for Saint John United States is based on climate observations for 2026 year

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Absolute maximum temperature (°C)	15.2	19.1	24.9	28.6	31.5	36.3	37.3	40.9	38.8	30.2	22.5	19.0
Average daytime temperature (°C)	7.1	10.5	13.7	21.3	24.9	29.1	32.3	33.6	29.8	21.7	14.5	9.1
Average temperature (°C)	1.3	2.9	6.5	13.6	18.9	23.2	26.3	27.4	23.5	15.5	8.4	4.4
Average night temperature (°C)	-2.6	-2.5	1.1	7.7	13.9	18.1	21.3	21.5	18.3	10.5	3.7	0.7
Absolute minimum temperature (°C)	-14.5	-13.9	-7.9	-2.3	4.1	14.3	15.9	14.5	12.3	-5.5	-5.5	-4.7

The best time to visit Saint John during the most sunny months:

The largest precipitation sum in Saint John is at

May — 116(mm)

June — 143(mm)

July — 171(mm)

When is the best time to visit Saint John?

The historical weather data above shows the warmest, sunniest and driest months to help you choose the best time to visit Saint John.

What is the weather like in Saint John?

See average temperature, rainfall and daylight hours for Saint John by month in the table above.

How many sunny days does Saint John have?

The monthly weather statistics above show sunshine and rainfall patterns for Saint John throughout the year.