San Isidro Weather in September
What's the weather like in San Isidro (Lima) in September 2025?
The climate in San Isidro during September can be summarized as mild and very dry.
September is in the spring in San Isidro and is typically the 2nd coldest month of the year. Daytime maximum temperatures average around 19°C (66°F), whilst at night 13°C (55°F) is normal.
| Daytime temperature | 18.8°C 65.8°F |
|---|---|
| Nightly temperature | 12.9°C 55.1°F |
| Average temperature | 15.8°C 60.4°F |
| Daily sunshine | 1.8 hrs |
| Avg rainfall | 2 mm 0.1 ins |
| Rainy days | 1 days |
| Sea temperature | 16.8°C 62.3°F |
| Humidity | 88% |
| Windspeed | 11.9kph 7 mph |
On average September is the 4th wettest month of the year in San Isidro with around 2mm 0.1 inches of rain making it a very dry time to visit.
On the flip side this corresponds to an average of 1.8 hours of sunshine per day.
September temperatures in San Isidro
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 Isidro in September 2025.
Other monthly averages
Best places to visit in September
San Isidro weather stats
| Hottest month: | February | 26.6°C 79.9°F |
|---|---|---|
| Driest month: | February | 1mm 0ins |
| Sunniest month: | April | 7.4hrs |
| Coldest month: | August | 18.4°C 65.1°F |
| Wettest month: | August | 3mm 0.1ins |
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