Saint John weather

Our guide to the weather in Saint John during July

28

Average high

6

UV Index

112mm

Monthly rainfall

78%

Humidity

We've looked at the most up-to-date weather data for Saint John, covering the last 12 years up to 2024, plus we've asked our team of travel bloggers for their first-hand experiences in order to answer the most frequently asked questions about Saint John weather in July.

How warm is it in Saint John during July?

The temperature is extremely stable in July with average highs of 28℃ and lows just 1℃ lower at 27℃. Of course, the high humidity will make it feel even hotter. The UV index will be high at this time of year, so protection against skin and eye damage is needed. Try to limit exposure between 10am and 4pm. Apply broad spectrum SPF 30+ sunscreen every few hours, even if it's cloudy, or more frequently after sweating or swimming, and wear UV-blocking sunglasses too, and bear in mind that bright surfaces, such as sand and water increase UV exposure.

Does it rain in Saint John during July?

On average, there will be 6 rainy days during the month, amounting to 112.4mm in total. That's a significant amount of rain. For comparison, the wettest months in the UK typically sees between 80mm and 100mm, depending on where you are. Due to the high temperature and humidity, you might expect lots of thunderstorms, however they're actually fairly infrequent at this time of year. On average, July will see just 3 days that produce a storm.

Is it windy in Saint John during July?

Expect moderate breeze becoming stronger at times during July, with occasional gusts up to 22mph. The high humidity and warm temperature will make the breeze feel warm, so any cooling effect will be limted.

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Weather in Saint John

Our month-by-month guide to the weather and climate in Saint John

26.1

Saint John weather in

January
25.9

Saint John weather in

February
25.7

Saint John weather in

March
26.3

Saint John weather in

April
27.1

Saint John weather in

May
27.9

Saint John weather in

June
28.3

Saint John weather in

July
28.6

Saint John weather in

August
28.8

Saint John weather in

September
28.6

Saint John weather in

October
27.8

Saint John weather in

November
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Saint John weather in

December