Saint John Parish weather
Our guide to the weather in Saint John Parish during September
We've looked at the most up-to-date weather data for Saint John Parish, 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 Parish weather in September.
How hot is it in Saint John Parish during September?
The temperature reaches around 31℃ during the daytime in September, falling away to 22℃ at night. 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 Parish during September?
On average, there will be 11 rainy days during the month, amounting to 189.7mm 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, September will see just 3 days that produce a storm.
Is it windy in Saint John Parish during September?
You're unlikely to experience any strong winds. Expect a light breeze that picks up slightly at times in September. The high humidity and warm temperature will make the breeze feel warm, so any cooling effect will be limted.
Weather in Saint John Parish
Our month-by-month guide to the weather and climate in Saint John Parish
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