Temperature
Warm by day, warm at night.
83°Ftypical September high
September climate
September in Batam
Indonesia · Southeast Asia
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
8.5 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. About 21 wet days, fewer than in most months.
70%wet-day frequency
AmountWet-day chance
Sunshine
Cloudier spells limit sunshine.
8.5 hSeptember sunshine
Heat & humidity by month
Very humid air is a major factor this month.
74%September Heat feel
Humid airVery humid air
Hourly temperature pattern
In September, days and nights feel about the same, around 86°.
WarmHotNight hours
Clear sky
Mostly cloudy skies this month.
21%September Clear sky
Clear skyCloud
Wind pattern
Calm winds are typical in September.
9 mphSeptember Light breeze
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
Morning81°F
Feels 85°F
Rain49%
Cloud81%
Humid airVery high
Sun intensityModerate
Midday81°F
Feels 86°F
Rain34%
Cloud78%
Humid airVery high
Sun intensityStrong
Late afternoon82°F
Feels 87°F
Rain17%
Cloud73%
Humid airVery high
Sun intensityModerate
Early evening82°F
Feels 87°F
Rain20%
Cloud73%
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 | 81 | 78 | 9.1 | 19 | 8.4 | 83 | 82 |
| Feb | 81 | 78 | 4.3 | 14 | 9.3 | 82 | 82 |
| Mar | 82 | 79 | 6.8 | 21 | 9.3 | 82 | 83 |
| Apr | 83 | 79 | 8.3 | 26 | 9.3 | 81 | 85 |
| May | 84 | 80 | 8.8 | 27 | 9.1 | 81 | 86 |
| Jun | 84 | 80 | 8.0 | 23 | 8.8 | 80 | 86 |
| Jul | 83 | 80 | 7.1 | 22 | 8.8 | 80 | 85 |
| Aug | 83 | 79 | 7.2 | 23 | 8.7 | 80 | 85 |
| Sep | 83 | 80 | 6.3 | 21 | 8.5 | 80 | 85 |
| Oct | 83 | 79 | 8.7 | 25 | 8.5 | 81 | 85 |
| Nov | 82 | 79 | 12.9 | 28 | 7.8 | 82 | 85 |
| Dec | 81 | 78 | 12.5 | 26 | 7.7 | 83 | 83 |
Similar climates
Similar
Similar travel styleCebu CityPhilippinesSimilar travel stylePenangMalaysiaSimilar travel styleColomboSri LankaSimilar travel styleAccraGhana
Want a side-by-side climate view? Compare Batam with Cebu City.
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: Jul 27, 2026
Data & methodology