San Julian Weather in September
What's the weather like in San Julian (Santa Cruz) in September 2025?
The climate in San Julian during September can be summarized as hot and reasonably dry.
September is in the spring in San Julian and is typically the 6th coldest month of the year. Daytime maximum temperatures average around 30°C (86°F), whilst at night 18°C (64°F) is normal.
| Daytime temperature | 30.2°C 86.4°F |
|---|---|
| Nightly temperature | 18°C 64.4°F |
| Average temperature | 24.1°C 75.4°F |
| Daily sunshine | 8.7 hrs |
| Avg rainfall | 51 mm 2 ins |
| Rainy days | 5 days |
| Sea temperature | 19.2°C 66.6°F |
| Humidity | 60% |
| Windspeed | 18.4kph 11 mph |
On average September is the 3rd driest month of the year in San Julian with around 51mm 2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 5 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.7 hours of sunshine per day.
September temperatures in San Julian
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 Julian in September 2025.
Other monthly averages
Best places to visit in September
San Julian weather stats
| Hottest month: | January | 30.9°C 87.6°F |
|---|---|---|
| Driest month: | August | 34mm 1.3ins |
| Sunniest month: | August | 9hrs |
| Coldest month: | June | 24.7°C 76.5°F |
| Wettest month: | January | 154mm 6.1ins |
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