Temperature
Warm by day, warm at night.
83°Ftypical September high
Typical range
September climate
September in St. Johns
Antigua · Caribbean
Warm days and some sun. Humid air is the main drawback.
Some tradeoffs
Daytime high
83°F
Lows around 80°F
Rain
Rain most days
Sun
11 h/day
Air feel
Very humid
Sea temp
85°F
Great for swimming
When to visit
Month-by-month fit
Best
Precipitation
It rains on most days, with a mix of brief and longer spells. About 18 wet days, more than in most months.
60%wet-day frequency
AmountWet-day chance
Sunshine
Cloudier spells limit sunshine.
11.2 hSeptember sunshine
Heat & humidity by month
Very humid air is a major factor this month.
52%September Heat feel
Easy airWarm airHumid airVery humid air
Hourly temperature pattern
In September, afternoons feel about 85° and nights feel near 83°.
ComfortableWarmHotNight hours
Clear sky
Partly cloudy skies this month.
42%September Clear sky
Clear skyCloud
Wind pattern
September's typical breeze keeps the air from feeling as stagnant.
13 mphSeptember Breezy
Sea temperature
85°FSeptember sea temp
More detailIncludes daypart comfort
Typical September day
September stays around 82°F through the day and night, with little temperature relief.
Avg temp Typical range
Morning82°F
Feels 84°F
Rain27%
Cloud55%
Humid airVery high
Sun intensityModerate
Midday82°F
Feels 85°F
Rain26%
Cloud56%
Humid airVery high
Sun intensityStrong
Late afternoon82°F
Feels 85°F
Rain26%
Cloud59%
Humid airVery high
Sun intensityModerate
Early evening82°F
Feels 85°F
Rain30%
Cloud60%
Humid airVery high
Sun intensityMinimal
Best windowData tableView month-by-month numbers
View month-by-month numbers
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% | Sea°F |
|---|---|---|---|---|---|---|---|
| Jan | 78 | 76 | 1.1 | 10 | 10.8 | 77 | 80 |
| Feb | 78 | 76 | 1.0 | 7 | 11.0 | 76 | 79 |
| Mar | 78 | 76 | 0.8 | 7 | 11.5 | 76 | 79 |
| Apr | 79 | 77 | 1.3 | 9 | 11.8 | 78 | 80 |
| May | 80 | 78 | 2.2 | 12 | 11.5 | 80 | 81 |
| Jun | 82 | 79 | 1.9 | 11 | 11.9 | 80 | 83 |
| Jul | 82 | 80 | 3.0 | 16 | 12.0 | 81 | 83 |
| Aug | 83 | 80 | 3.8 | 17 | 11.6 | 81 | 84 |
| Sep | 83 | 80 | 4.4 | 18 | 11.2 | 81 | 85 |
| Oct | 82 | 80 | 5.6 | 19 | 10.6 | 81 | 84 |
| Nov | 81 | 79 | 4.0 | 14 | 10.3 | 79 | 83 |
| Dec | 80 | 77 | 2.0 | 11 | 10.3 | 77 | 82 |
Similar climates
Similar
Similar travel styleWhitsundaysAustraliaSimilar travel styleAbaco IslandsBahamasSimilar travel styleExumaBahamasSimilar travel styleSt. ThomasUS Virgin Islands
Want a side-by-side climate view? Compare St. Johns with Whitsundays.
Climate data notePlanning guidance, not a forecast
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 1, 2026
Data & methodology