Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
During September and October, São Francisco do Maranhão experiences its peak temperatures, averaging a high-temperature of 36.5°C (97.7°F).Humidity
September is the least humid month in São Francisco do Maranhão, Brazil, with an average relative humidity of 39%.Rainfall
January through July, September through December are months with rainfall in São Francisco do Maranhão. September is the first month it rains in São Francisco do Maranhão. Throughout September, in the average 2.5 rainfall days, it receives 3mm (0.12") of precipitation. Throughout the year, there are 157.4 rainfall days, and 636mm (25.04") of precipitation is accumulated.Daylight
The average length of the day in September is 12h and 5min.On the first day of September, sunrise is at 05:51 and sunset at 17:51. On the last day of the month, sunrise is at 05:36 and sunset at 17:46 -03.
Sunshine
The month with the most sunshine is September, with an average of 9.9h of sunshine.UV index
September is the month with the highest UV index in São Francisco do Maranhão, Brazil, with an average maximum UV index of 8. A UV Index value of 8 to 10 symbolizes a very high health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 8 during September translates into these guidelines:
Take the necessary steps to protect yourself; unprotected skin and eyes are vulnerable to damage. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Frequently asked questions
What is the warmest month in São Francisco do Maranhão?
How hot is it in São Francisco do Maranhão in September?
What is the least humid month in São Francisco do Maranhão?
What is the average humidity in September in São Francisco do Maranhão?
When does it start raining in São Francisco do Maranhão?
What is the average length of the day in September in São Francisco do Maranhão?
What time are sunrise and sunset in September in São Francisco do Maranhão?
What month has the most sunshine in São Francisco do Maranhão?
How long on average sun shines in September in São Francisco do Maranhão?
What is the month with the highest UV index in São Francisco do Maranhão?
What is the UV index intensity in September in São Francisco do Maranhão?
Average temperature in September
São Francisco do Maranhão, Brazil
- Average high temperature in September: 36.5°C
The warmest months (with the highest average high temperature) are September and October (36.5°C).
The months with the lowest average high temperature are March and April (31.4°C).
- Average low temperature in September: 23.5°C
The month with the highest average low temperature is October (25°C).
The coldest month (with the lowest average low temperature) is July (21.8°C).
Average pressure in September
São Francisco do Maranhão, Brazil
- Average pressure in September: 1011.8mbar
The month with the highest atmospheric pressure is July (1013.9mbar).
The month with the lowest atmospheric pressure is November (1008.9mbar).
Average wind speed in September
São Francisco do Maranhão, Brazil
- Average wind speed in September: 14.2km/h
The windiest month (with the highest average wind speed) is July (15.9km/h).
The calmest month (with the lowest average wind speed) is March (7.3km/h).
Average humidity in September
São Francisco do Maranhão, Brazil
- Average humidity in September: 39%
The month with the highest relative humidity is March (78%).
The month with the lowest relative humidity is September (39%).
Average rainfall in September
São Francisco do Maranhão, Brazil
- Average rainfall in September: 3mm
The wettest month (with the highest rainfall) is March (137mm).
The driest month (with the least rainfall) is August (0mm).
Average rainfall days in September
São Francisco do Maranhão, Brazil
- Average rainfall days in September: 2.5 days
The month with the highest number of rainy days is March (26.8 days).
The month with the least rainy days is August (0.5 days).
Average daylight in September /
Average sunshine in September
São Francisco do Maranhão, Brazil
- Average daylight in September: 12h and 1min
The month with the longest days is December (Average daylight: 12h and 30min).
The month with the shortest days is June (Average daylight: 11h and 48min).
- Average sunshine in September: 9h and 5min
The month with the most sunshine is September (Average sunshine: 9h and 54min).
The month with the least sunshine is April (Average sunshine: 7h and 24min).
Average sunshine days in September
São Francisco do Maranhão, Brazil
- Average sunshine days in September: 27.2 days
The month with the most sunshine days is August (30.2 days).
The month with the least sunshine days is March (3.1 days).
Average UV index in September
São Francisco do Maranhão, Brazil
- Average UV index in September: 8
The month with the highest UV index is September (UV index 8).
The months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 7).
Average cloud cover in September
São Francisco do Maranhão, Brazil
- Average cloud cover in September: 17
The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 13).
Average visibility in September
São Francisco do Maranhão, Brazil
- Average visibility in September: 10km
The months with the highest visibility are May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March and April (9km).
São Francisco do Maranhão, Brazil
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