Monthly weather averages & travel planning

North America › 🇧🇧 Barbados › Bridgetown
Updated: March 2026
September is a fair time to visit Bridgetown (4/10). With 11 daily sunshine hours and only 19 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 9th sunniest of the year in Bridgetown. September suits travellers visiting for indoor culture, food, and architecture rather than outdoor activities. Pack accordingly for 19 potential rain days. October offers a similar profile at lower hotel rates if dates are flexible. Watch out for prolonged rain stretches: with 19 wet days, a fully outdoor itinerary is risky. Build in museum days and covered market visits as contingency. Planning tips: most accommodation categories have availability, and last-minute deals are common. The quieter streets and shorter queues can make this a genuinely enjoyable time to visit for the right type of traveller. Budget-conscious visitors will find the best value of the year in this period.
Based on 30-year climate normals (1991 to 2020), September in Bridgetown averages 29°C by day and 26°C overnight, a range that places it firmly in the warmer tier of the annual calendar. The month records approximately 11 sunshine hours per day and 126mm of total rainfall across 19 wet days, giving it a sunshine-to-rain ratio that is broadly workable for most itineraries.
29°C
84°F
Avg High
26°C
79°F
Avg Low
19 days
126 mm total
Rain Days
11h
per day avg
Sunshine
82%
Humid
Humidity
The narrow 3°C gap between daytime and overnight temperatures, characteristic of coastal cities with maritime moderation, means a single mid-layer works across the whole day. At 82% humidity, the 29°C daytime high feels 2-4°C warmer in practice: quick-dry fabrics and shade-seeking between noon and 3pm are the sensible response. UV index averages 6 this month, classed as moderate. Sunscreen is a sensible precaution for extended outdoor time, particularly at midday. Wind averages 25 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 84°F average high, 79°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Packing for Bridgetown in September means dressing for 29°C days and 26°C evenings. A lightweight linen or cotton shirt with loose-fit trousers or a sundress handles the 29°C daytime heat. Evening temperatures settle at 26°C, a modest 3°C drop that a light cardigan or denim jacket covers. For footwear, breathable walking sandals work for casual exploration, but closed-toe trainers are better for uneven surfaces in the historic centre. With 19 rain days expected, a compact travel umbrella is worth the bag space. A waterproof jacket is better than an umbrella if you plan full-day outdoor routes. At 82% average humidity, quick-dry synthetic or bamboo fabrics dry overnight and stay comfortable longer than cotton.
Local tip: Bridgetown sees heavy rain periods where a compact travel umbrella can feel inadequate. A packable waterproof jacket offers better coverage for prolonged downpours and leaves both hands free for maps and cameras.
September has no major festivals or public holidays in Bridgetown, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.
Based on 29°C average highs and 19 rainy days
Bridgetown's September climate is governed by the Inter-Tropical Convergence Zone (ITCZ), which draws moisture-laden trade winds across the region, producing the characteristic wet season rainfall of steamy tropical cities. Daytime heat peaks around 29°C, moderated slightly by afternoon convective showers. Overnight temperatures remain warm at 26°C because the humid air retains heat effectively. Climate data: Open-Meteo ERA5 (1991–2020).
Sunshine Hours
The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.
UV Index
A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate, wear sunscreen. UV 6-7: High, hat and SPF 30+ essential. UV 8-10: Very High, limit midday exposure. UV 11+: Extreme, seek shade between 10am-4pm.
Rain Days
A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.
Humidity
Relative humidity as a percentage. Below 40%: Dry, skin and throat may feel parched. 40-60%: Comfortable, ideal for most people. 60-80%: Sticky, light breathable fabrics recommended. Above 80%: Muggy, heat feels more intense; quick-dry clothing is essential.
Bridgetown in September
September ranks 9th sunniest of the year in Bridgetown, with an average 11 daily sunshine hours. The driest months are February, March, and April. September is the hottest month (29°C avg high); January is the coolest (27°C). From here, temperatures fall 1°C into October. Compared to last month (August: 28°C high, 21 rain days), September is warmer and drier. September sits in the middle of the annual sunshine ranking for Bridgetown, offering a reasonable balance of good weather and manageable crowds.
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 27°C | 24°C | 11 | 11h | View |
| February | 27°C | 24°C | 8 | 11h | View |
| March | 27°C | 24°C | 8 | 12h | View |
| April | 28°C | 25°C | 8 | 12h | View |
| May | 28°C | 26°C | 10 | 12h | View |
| June | 28°C | 26°C | 15 | 11h | View |
| July | 28°C | 26°C | 20 | 11h | View |
| August | 28°C | 26°C | 21 | 11h | View |
| September | 29°C | 26°C | 19 | 11h | View |
| October | 28°C | 26°C | 21 | 10h | View |
| November | 28°C | 25°C | 20 | 10h | View |
| December | 27°C | 25°C | 13 | 11h | View |
January
11 rain days, 11h sun
February
8 rain days, 11h sun
March
8 rain days, 12h sun
April
8 rain days, 12h sun
May
10 rain days, 12h sun
June
15 rain days, 11h sun
July
20 rain days, 11h sun
August
21 rain days, 11h sun
September
19 rain days, 11h sun
October
21 rain days, 10h sun
November
20 rain days, 10h sun
December
13 rain days, 11h sun
Data Sources for Bridgetown
Climate normals represent 30-year averages (1991-2020). Individual years may vary.