Saint Johnʼs Weather in September
September in Saint Johnʼs averages 30°C (86°F) during the day and 27°C (81°F) at night. Quite a bit of rainfall is typical this month, with around 138 mm (5.4 in) on average. An umbrella is a good idea.
Rainfall in Saint Johnʼs in September
Rain is expected on roughly 17 days, totalling around 138 mm (5.4 in) for the month. This is a wet month with frequent and often heavy showers. Both the number of rain days and the total rainfall are high.
Temperature in Saint Johnʼs in September
September in Saint Johnʼs brings typical temperatures with highs around 30°C (86°F) and lows of 27°C (81°F). Overall, the month follows a fairly predictable daily temperature pattern. At 27°C (81°F) overnight, the heat doesn't let up much after dark. If you're staying somewhere without air conditioning, a cold shower before bed and keeping the air moving can help.September in Saint Johnʼs can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Antigua & Barbuda, check out our Saint Johnʼs's climate page.
Saint Johnʼs Temperature in September
Min Temperature
27°C (81°F)
Max Temperature
30°C (86°F)
Chance of Rain
55%
Precipitation
138 mm (5.4 in)
Rainy days
17 days
Daily Historical Temperatures
47-year average (1976-2025)
Based on our historical records, temperatures in Saint Johnʼs typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 26°C (79°F).
Average temperatures in September
Daily Historical Precipitation
47-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather for Saint Johnʼs in September
Browse day-by-day weather records for Saint Johnʼs spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Saint Johnʼs historical weather extremes in September
The extremes listed below come from historical weather data collected in Saint Johnʼs from 1996 through 2025.
- The hottest September day on record in Saint Johnʼs reached 36°C (97°F) (September 22, 2020).
- The lowest daytime temperature in September was 26°C (79°F), recorded on September 3, 2009.
- Saint Johnʼs registered its coldest September night on September 22, 2019, with temperatures dropping to 21°C (70°F).
Best Places in Antigua & Barbuda in September
Find out more about the weather in Antigua & Barbuda and which places have the best travel conditions in this month. See all of Antigua & Barbuda in September →
perfect weather
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tolerable
unpleasant
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What to Wear in Saint Johnʼs in September
Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes.What To Do in Saint Johnʼs in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Antigua & Barbuda, check out our Saint Johnʼs's climate page.
See the full Saint Johnʼs climate overview or explore weather in Antigua & Barbuda.
