Weather in Bali 🇮🇩
Monthly weather averages & travel planning
September
Avg Temp
27°C
Rain Days
11 days
Sun Hours
12 hrs
Humidity
82%
Asia › 🇮🇩 Indonesia › Bali
Updated: March 2026
Is September a Good Time to Visit Bali?
6/10
Good
September is a good time to visit Bali (6/10). With 12 daily sunshine hours and only 11 rain days, this month delivers genuinely reliable outdoor conditions, ranking it the sunniest month of the year in Bali. Culture-focused travellers and those who prefer lighter crowds will find September a practical choice, with prices running lower than peak September without sacrificing all the good weather. October offers a similar profile at lower hotel rates if dates are flexible. The main practical note: Bali's popular sites are busiest between 10am and 3pm regardless of season. Arriving at opening time or after 4pm makes a significant difference to the experience. Planning tips: accommodation is generally available without long lead times, and flight prices are typically lower than peak season. Flexible travellers will find the best deals by booking 2-4 weeks ahead. Mid-week arrivals consistently unlock lower hotel rates than weekend check-ins.
vs August:26°C avg high
September sits at a particular moment in Bali's seasonal arc. Temperatures average 27°C during the day, placing this month in the warmer half of the year, when the city operates at full summer intensity. Against the seasonal backdrop, 11 rainy days and 12 sunshine hours per day help calibrate expectations for what actually awaits on the ground.
27°C
81°F
Avg High
23°C
73°F
Avg Low
11 days
53 mm total
Rain Days
12h
per day avg
Sunshine
82%
Humid
Humidity
Temperature in Bali in September
The narrow 4°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 27°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 16 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 81°F average high, 73°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Temperature Trends
High
Low
Rainfall (mm)
0-20 mm21-50 mm51-100 mm100+ mm
What to Wear in Bali in September
Morning23°CBefore the day warms up
Afternoon27°CPeak daytime temperature
Evening26°CAfter sunset cools down
Packing for Bali in September means dressing for 27°C days and 23°C evenings. A light cotton tee with a casual overshirt works well at 27°C, the overshirt doubles as a layer for air-conditioned venues. Evening temperatures settle at 23°C, a modest 4°C drop that a light cardigan or denim jacket covers. Comfortable walking trainers are the versatile choice for both outdoor sightseeing and indoor venues. A compact foldable umbrella weighs almost nothing and earns its keep across 11 potential rainy days. For temple and religious site visits, carry a lightweight scarf or sarong to cover shoulders and knees, required at most major sites across the region. At 82% average humidity, quick-dry synthetic or bamboo fabrics dry overnight and stay comfortable longer than cotton.
Local tip: Temple and religious site visits require covered shoulders and knees in most of Bali's heritage areas. A lightweight scarf or sarong weighs almost nothing and solves the problem instantly.
Events in Bali in September
September has no major festivals or public holidays in Bali, 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.
What to Pack for Bali in September
Based on 27°C average highs and 11 rainy days
- Light layers for morning and evening
- Breathable T-shirts and comfortable trousers
- UV-protective sunglasses
- Quick-dry travel towel
- Anti-chafe balm for long walking days
- Moisture-wicking synthetic fabrics for active days
- Compact folding umbrella
- Waterproof outer layer or packable rain jacket
- Quick-dry clothing that recovers fast after a shower
- SPF 30+ sunscreen
- Comfortable walking shoes (a second pair lets the first air out overnight)
- Universal travel adapter
- Small day pack for city exploration
- Reusable water bottle
Best Activities in Bali in September
- Explore outdoor markets and street food stallsMid-morning (10am-12pm)At 27°C, the temperature is ideal for extended walking without overheating
- Guided walking tour of the historic centreMorning or late afternoonComfortable temperatures allow several hours on foot without fatigue
- Visit rooftop viewpoints and observation decksGolden hour (1 hour before sunset)Warm clear evenings provide exceptional visibility for panoramic photography
- Day trip to the surrounding countryside or coastFull day (depart by 8am)September is reliably dry enough for rural day trips without weather risk
- Afternoon in a world-class museum or galleryAfternoon (2-5pm)Pairs well with outdoor morning activities and provides a mid-day rest from sightseeing
- Coffee-house or traditional cafe culture experienceMid-morning or post-lunchA cultural ritual in this region that rewards slow appreciation regardless of weather
- Evening live music, theatre, or opera performanceEvening shows typically at 7-9pmConsistent evening temperatures make getting to and from evening venues comfortable
- Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningSeptember brings distinct seasonal changes to public green spaces worth exploring
- Seek out chilled local specialities: cold-brew tea, ice desserts, or chilled seafood at street-level stallsAny time; most atmospheric in evening marketsHot-weather street food culture peaks in September, with vendors setting up specifically for warm evenings
Why is Bali warm in September?
In September, Bali sits in the dry season corridor, as the ITCZ shifts away from the region and trade winds bring drier, more stable air. This produces reliably sunny days reaching 27°C, with lower humidity than the wet months. Overnight lows of 23°C offer a pleasant reprieve from the midday heat. 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.
Frequently Asked Questions
Bali in September
In September, Bali experiences average highs of 27°C (81°F) and lows of 23°C (73°F). Expect around 11 rainy days and 12 hours of sunshine per day, with humidity averaging 82%. The 4°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an overshirt or cardigan handles the cooler evenings. UV index averages 6, so sun protection is advisable on clear days.
Bali typically sees 11 rainy days in September, with total precipitation of around 53mm. Rain is moderate and manageable. Showers tend to pass quickly, and a light rain layer or foldable umbrella is sufficient protection for most days. For context, the driest month in Bali typically sees 4-6 fewer rain days than September.
Pack light layers, a light jacket for evenings, comfortable walking shoes, and sunscreen for Bali in September. Daytime temperatures of 27°C are pleasant, but the evening drop to 23°C means a jacket is essential if you plan to be out after dark. With 11 rainy days, bring a compact umbrella or waterproof jacket for unexpected showers. Comfortable walking shoes are a priority given the amount of ground most visitors cover.
Yes, September is an excellent time to visit Bali. With 12 daily sunshine hours and only 11 rainy days, conditions are ideal for sightseeing and outdoor activities. Temperatures averaging 27°C during the day are comfortable for long walks and outdoor dining. This is peak travel season, so booking accommodation in advance and arriving at popular attractions early in the morning helps avoid the busiest periods.
The average high temperature in Bali in September is 27°C (81°F), and the average low is 23°C (73°F). The mean daily temperature is approximately 25°C (77°F). The day-to-night range of 4°C is narrow, typical of coastal or maritime cities. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.
The best month to visit Bali is generally September. September offers the most sunshine at 12 hours per day and only 11 rainy days. Average temperatures reach 27°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around September gives you the best chance of dry, bright weather.
September is shoulder or low season in Bali, meaning fewer tourists and generally lower prices than peak months. With 12 sunshine hours and 11 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.
In September, Bali suits a range of activities thanks to mild temperatures around 27°C. Mix of indoor and outdoor activities works well given the moderate chance of rain. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 12 hours of sunshine, parks and waterfront walks are particularly enjoyable.
September ranks 1st sunniest of the year in Bali, with an average 12 daily sunshine hours. The driest months are August, September, and July. January is the hottest month (28°C avg high); July is the coolest (26°C). From here, temperatures rise 1°C into October. Compared to last month (August: 26°C high, 10 rain days), September is warmer and wetter. September is among the top three sunniest months to visit Bali.
Year-Round Climate
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 28°C | 25°C | 29 | 9h | View |
| February | 28°C | 25°C | 27 | 9h | View |
| March | 28°C | 25°C | 28 | 10h | View |
| April | 28°C | 25°C | 24 | 10h | View |
| May | 28°C | 25°C | 18 | 11h | View |
| June | 27°C | 24°C | 14 | 11h | View |
| July | 26°C | 23°C | 12 | 11h | View |
| August | 26°C | 23°C | 10 | 11h | View |
| September | 27°C | 23°C | 11 | 12h | View |
| October | 28°C | 24°C | 17 | 12h | View |
| November | 28°C | 24°C | 23 | 11h | View |
| December | 28°C | 25°C | 28 | 10h | View |
January
29 rain days, 9h sun
28°25°
February
27 rain days, 9h sun
28°25°
March
28 rain days, 10h sun
28°25°
April
24 rain days, 10h sun
28°25°
May
18 rain days, 11h sun
28°25°
June
14 rain days, 11h sun
27°24°
July
12 rain days, 11h sun
26°23°
August
10 rain days, 11h sun
26°23°
September
11 rain days, 12h sun
27°23°
October
17 rain days, 12h sun
28°24°
November
23 rain days, 11h sun
28°24°
December
28 rain days, 10h sun
28°25°
Other Months in Bali
Plan Your Trip to Bali
Data Sources for Bali
Climate normals represent 30-year averages (1991-2020). Individual years may vary.