Umalas Weather in September
September in Umalas averages 27°C (81°F) during the day and 24°C (75°F) at night. The perfect conditions and moderate rainfall make it a solid month to visit.
Rainfall in Umalas in September
On average, there are about a single day with rain during this month, averaging 58 mm (2.3 in). On the rare occasion it does rain, the shower can be quite heavy given the low total spread across a single day.
Temperature in Umalas in September
September tends to be one of the perfect months in Umalas, with 27°C (81°F) in the afternoon and 24°C (75°F) overnight. Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights stay warm at around 24°C (75°F), so light bedding and good ventilation are worth thinking about.
Sunshine in Umalas in September
Expect a lot of sunshine this month, with about 251 hours of sun. These sunny conditions add to the overall experience.
Average water temperature in September
The water is 27°C (81°F) this month — warm enough that getting in requires no effort at all. Good conditions for swimming, snorkeling, or just floating around.If your ideal day consists of dry skies and pleasant temperatures, May, June, July, August, September and October typically offer the best circumstances for Umalas.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Indonesia, check out our Umalas's climate page.
Umalas Temperature in September
Min Temperature
24°C (75°F)
Max Temperature
27°C (81°F)
Water Temperature
27°C (81°F) *
Chance of Rain
3%
Precipitation
58 mm (2.3 in)
Rainy days
a single day
Humidity
80% *
Sunshine
251 hours *
Percentage Sunshine
56% *
Daily Historical Temperatures
48-year average (1976-2025)
Based on our historical records, temperatures in Umalas typically stay consistent throughout September, with daily highs averaging around 27°C (81°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in September
Daily Historical Precipitation
48-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 Umalas in September
Browse day-by-day weather records for Umalas spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Umalas historical weather extremes in September
According to our 34 years of weather records for Umalas, the following extremes were recorded between 1991 and 2025.
- Umalas recorded its highest September temperature of 33°C (91°F) on September 26, 2008.
- The coldest September day was on September 15, 1991, with a maximum of 24°C (75°F).
- Nighttime temperatures dropped to 18°C (64°F) on September 4, 2006, marking the coldest September night on record.
Best Places in Indonesia in September
Find out more about the weather in Indonesia and which places have the best travel conditions in this month. See all of Indonesia in September →
perfect weather
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tolerable
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What to Wear in Umalas 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. Rain gear is recommended, you can expect wet weather on multiple days. Expect water temperatures of around 27°C (81°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Umalas 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 Indonesia, check out our Umalas's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Umalas climate overview or explore weather in Indonesia.
