Cacoal Weather in September
What's the weather like in Cacoal (Rondônia) in September 2025?
The climate in Cacoal during September can be summarized as hot, humid and a little damp.
September is in the spring in Cacoal and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around a steamy 34°C (92°F), whilst at night 20°C (69°F) is normal.
| Daytime temperature | 33.5°C 92.2°F |
|---|---|
| Nightly temperature | 20.4°C 68.6°F |
| Average temperature | 26.9°C 80.4°F |
| Daily sunshine | 5.9 hrs |
| Avg rainfall | 89 mm 3.5 ins |
| Rainy days | 6 days |
| Sea temperature | 21.3°C 70.4°F |
| Humidity | 76% |
| Windspeed | 9.7kph 6 mph |
On average September is the 5th driest month of the year in Cacoal with around 89mm 3.5 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.9 hours of sunshine per day.
September temperatures in Cacoal
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Cacoal in September 2025.
Other monthly averages
Best places to visit in September
Cacoal weather stats
| Hottest month: | October | 33.3°C 91.9°F |
|---|---|---|
| Driest month: | July | 11mm 0.4ins |
| Sunniest month: | July | 8.2hrs |
| Coldest month: | June | 30.3°C 86.5°F |
| Wettest month: | December | 303mm 11.9ins |
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