September weather forecastBlom, Guinea-Bissau
September
Weather in September
The first month of the autumn, September, is a tropical month in Blom, Guinea-Bissau, with an average temperature varying between 25°C (77°F) and 30.5°C (86.9°F).Temperature
The arrival of September records an average high-temperature of a tropical 30.5°C (86.9°F), closely related to the 29.6°C (85.3°F) observed in August. Blom records an average low-temperature of 25°C (77°F) throughout the month of September.Heat index
The heat index in September is estimated at a blisteringly hot 40°C (104°F). Take greater precautions, heat exhaustion and heat cramps may be expected. Heatstroke could result from lengthy activity.One should consider that heat index numbers are for shaded settings and light wind. The direct sunshine could escalate the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', determines the feeling of heat when you account for the relative humidity. The influence of weather is personal, with a diverse population experiencing it differently due to differences in body mass, stature, and degree of activity. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. Overheating dangers loom when the body's heat release mechanisms are overshadowed by excessive gain.
Humidity
In September, the average relative humidity is 81%.Rainfall
In September, in Blom, Guinea-Bissau, the rain falls for 20.7 days. Throughout September, 132mm (5.2") of precipitation is accumulated. Throughout the year, there are 107.5 rainfall days, and 726mm (28.58") of precipitation is accumulated.Daylight
In Blom, Guinea-Bissau, the average length of the day in September is 12h and 11min.On the first day of the month, sunrise is at 06:52 and sunset at 19:13. On the last day of September, in Blom, sunrise is at 06:52 and sunset at 18:53 GMT.
Sunshine
In September, the average sunshine is 7.5h.UV index
January through December, with an average maximum UV index of 7, are months with the highest UV index. The months with the lowest UV index in Blom are January through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high threat to health from exposure to the Sun's UV radiation for the average person.Note: In September, an average UV index of 7 transforms into the following instructions:
Persist with safeguards and heed sun safety doctrines. Keeping sunburn at bay is of prime importance. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Blom, Guinea-Bissau
- Average high temperature in September: 30.5°C
The warmest month (with the highest average high temperature) is March (35.5°C).
The month with the lowest average high temperature is August (29.6°C).
- Average low temperature in September: 25°C
The month with the highest average low temperature is June (26°C).
The coldest month (with the lowest average low temperature) is January (21.8°C).
Average pressure in September
Blom, Guinea-Bissau
- Average pressure in September: 1012.2mbar
The month with the highest atmospheric pressure is July (1012.9mbar).
The months with the lowest atmospheric pressure are March and April (1010.1mbar).
Average wind speed in September
Blom, Guinea-Bissau
- Average wind speed in September: 9.7km/h
The windiest month (with the highest average wind speed) is June (13.2km/h).
The calmest months (with the lowest average wind speed) are October and November (9km/h).
Average humidity in September
Blom, Guinea-Bissau
- Average humidity in September: 81%
The month with the highest relative humidity is August (82%).
The month with the lowest relative humidity is January (32%).
Average rainfall in September
Blom, Guinea-Bissau
- Average rainfall in September: 132mm
The wettest month (with the highest rainfall) is August (270mm).
The driest months (with the least rainfall) are January and February (0mm).
Average rainfall days in September
Blom, Guinea-Bissau
- Average rainfall days in September: 20.7 days
The month with the highest number of rainy days is August (26.9 days).
The month with the least rainy days is January (0.3 days).
Average daylight in September /
Average sunshine in September
Blom, Guinea-Bissau
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 12h and 48min).
The month with the shortest days is December (Average daylight: 11h and 24min).
- Average sunshine in September: 7h and 30min
The months with the most sunshine are March, April and May (Average sunshine: 9h and 54min).
The month with the least sunshine is August (Average sunshine: 6h and 6min).
Average sunshine days in September
Blom, Guinea-Bissau
- Average sunshine days in September: 8 days
The month with the most sunshine days is January (30.7 days).
The month with the least sunshine days is August (2.9 days).
Average UV index in September
Blom, Guinea-Bissau
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover in September
Blom, Guinea-Bissau
- Average cloud cover in September: 46
The month with the most cloud cover is August (Cloud cover 57).
The months with the least cloud cover are March and April (Cloud cover 7).
Average visibility in September
Blom, Guinea-Bissau
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (10km).
The months with the lowest visibility are July and August (9km).
