September weather forecastSantos, Brazil
September
Weather in September
September brings the freshness of spring to Santos, with subtle temperature increases and a return to slightly higher humidity levels. Emphasize the significant jump in rainfall from 35mm (1.38") in August to 43mm (1.69") in September. Despite this, the weather remains primed for touring the city, warm sunshine with longer days and fair winds contributing to the charm of the month.Temperature
Santos's transition from August to September introduces an average high-temperature of a still pleasant 22.7°C (72.9°F), marking an insignificant variation from the 22.2°C (72°F). The temperature during September nights demonstrates a small drop from the daytime highs, settling to an average of 18.5°C (65.3°F).Humidity
The average relative humidity in September is 80%.Rainfall
In September, the rain falls for 12.6 days. Throughout September, 43mm (1.69") of precipitation is accumulated. Throughout the year, in Santos, there are 191.3 rainfall days, and 819mm (32.24") of precipitation is accumulated.Sea temperature
With an average sea temperature of 20.7°C (69.3°F), September is the month with the coldest seawater in Santos.Note: The majority of people do not enjoy swimming in 20.7°C (69.3°F). The difficulty in controlling breathing escalates as the temperature descends from 21°C (69.8°F) to 15°C (59°F).
Daylight
The average length of the day in September in Santos, Brazil, is 11h and 58min.On the first day of September in Santos, sunrise is at 06:15 and sunset at 17:54. On the last day of the month, sunrise is at 05:45 and sunset at 18:04 -03.
Sunshine
The average sunshine in September in Santos is 7.6h.UV index
The months with the lowest UV index are May, July through September, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 5 suggests this advice:
Undertake protective steps - Recommendations to avoid sunburn are issued. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Santos, Brazil
- Average high temperature in September: 22.7°C
The warmest month (with the highest average high temperature) is February (27.8°C).
The month with the lowest average high temperature is July (22°C).
- Average low temperature in September: 18.5°C
The month with the highest average low temperature is February (23.7°C).
The coldest month (with the lowest average low temperature) is August (17.5°C).
Average pressure in September
Santos, Brazil
- Average pressure in September: 1017.3mbar
The month with the highest atmospheric pressure is July (1020.1mbar).
The month with the lowest atmospheric pressure is December (1011.7mbar).
Average wind speed in September
Santos, Brazil
- Average wind speed in September: 11.5km/h
The windiest month (with the highest average wind speed) is November (11.6km/h).
The calmest month (with the lowest average wind speed) is February (9.8km/h).
Average humidity in September
Santos, Brazil
- Average humidity in September: 80%
The month with the highest relative humidity is November (84%).
The month with the lowest relative humidity is August (78%).
Average rainfall in September
Santos, Brazil
- Average rainfall in September: 43mm
The wettest month (with the highest rainfall) is February (125mm).
The driest month (with the least rainfall) is August (35mm).
Average rainfall days in September
Santos, Brazil
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is January (23.3 days).
The month with the least rainy days is August (9.1 days).
Average sea temperature in September
Santos, Brazil
- Average sea temperature in September: 20.7°C
The best month for swimming (with the highest average sea temperature) is February (27°C).
The coldest month (with the lowest average sea temperature) is September (20.7°C).
Average daylight in September /
Average sunshine in September
Santos, Brazil
- Average daylight in September: 12h and 0min
The month with the longest days is December (Average daylight: 13h and 36min).
The month with the shortest days is June (Average daylight: 10h and 42min).
- Average sunshine in September: 7h and 36min
The month with the most sunshine is May (Average sunshine: 8h and 6min).
The month with the least sunshine is November (Average sunshine: 7h and 0min).
Average sunshine days in September
Santos, Brazil
- Average sunshine days in September: 13.2 days
The month with the most sunshine days is August (19.5 days).
The month with the least sunshine days is February (3.5 days).
Average UV index in September
Santos, Brazil
- Average UV index in September: 5
The month with the highest UV index is January (UV index 7).
The months with the lowest UV index are May, July, August and September (UV index 5).
Average cloud cover in September
Santos, Brazil
- Average cloud cover in September: 38
The month with the most cloud cover is November (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in September
Santos, Brazil
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September and December (10km).
The months with the lowest visibility are October and November (9km).
