San Martín Weather in September
What's the weather like in San Martín (Meta) in September 2025?
The climate in San Martín during September can be summarized as hot, humid and very wet.
September is in the fall / autumn in San Martín and is typically the 5th coldest month of the year. Daytime maximum temperatures average around a steamy 30°C (86°F), whilst at night 20°C (68°F) is normal.
| Daytime temperature | 30.2°C 86.4°F |
|---|---|
| Nightly temperature | 20°C 68°F |
| Average temperature | 25.1°C 77.2°F |
| Daily sunshine | 5 hrs |
| Avg rainfall | 362 mm 14.2 ins |
| Rainy days | 20 days |
| Sea temperature | 26.5°C 79.7°F |
| Humidity | 77% |
| Windspeed | 8.6kph 5 mph |
On average September is the 5th driest month of the year in San Martín with around 362mm 14.2 inches of rain making it a very wet time to visit. This rainfall is typically spread over 20 days, although this may vary considerably.
On the flip side this corresponds to an average of 5 hours of sunshine per day.
September temperatures in San Martín
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 San Martín in September 2025.
Other monthly averages
Best places to visit in September
San Martín weather stats
| Hottest month: | March | 31.2°C 88.2°F |
|---|---|---|
| Driest month: | January | 70mm 2.8ins |
| Sunniest month: | January | 5.9hrs |
| Coldest month: | June | 28.8°C 83.8°F |
| Wettest month: | May | 512mm 20.2ins |
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