September weather forecastMonrovia, Liberia
September
Weather in September
September brings a slight turnaround in weather with a mild rise in temperature. The rainfall remains consistent at 265mm (10.43"), however, the humidity reaches its highest level of 86%. An increase in wind speed can be experienced while moving into October. Despite the high moisture content, Monrovia's coastal appeal remains strong due to stable sea temperatures. A significant decrease in rainfall is on the horizon as October arrives.Temperature
September registers an average high-temperature of a still warm 26.8°C (80.2°F), slightly varied from August's 26.2°C (79.2°F). With a barely noticeable fluctuation in temperature, Monrovia reaches an average low of 24.3°C (75.7°F) during the September nights.Humidity
The most humid month is September, with an average relative humidity of 86%.Rainfall
In Monrovia, during September, the rain falls for 29 days and regularly aggregates up to 265mm (10.43") of precipitation. Throughout the year, there are 298.8 rainfall days, and 1903mm (74.92") of precipitation is accumulated.Sea temperature
August and September, with an average sea temperature of 27°C (80.6°F), are months with the coldest seawater in Monrovia.Note: Water temperature ranging from 25°C (77°F) to 29°C (84.2°F) is seen as very warm and delightful by everyone. During these temperatures, water activities become enjoyable, without causing discomfort for extended periods.
Daylight
In September, the average length of the day in Monrovia is 12h and 9min.On the first day of the month, sunrise is at 06:35 and sunset at 18:49. On the last day of September, sunrise is at 06:30 and sunset at 18:34 GMT.
Sunshine
In Monrovia, the average sunshine in September is 5.7h.UV index
The months with the lowest UV index are June through September, with an average maximum UV index of 6. A UV Index reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In September, the average maximum UV index of 6 translates into the following recommendations:
Inhibit overexposure. Warding off sun damage is of utmost importance. Avoid direct Sun exposure and seek shade between 10 a.m. and 4 p.m., when UV radiation is at its peak, but keep in mind that not all shade structures provide complete protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Be attentive! The UV exposure is heightened with reflections from sand and water.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Monrovia, Liberia
- Average high temperature in September: 26.8°C
The warmest month (with the highest average high temperature) is January (29.9°C).
The month with the lowest average high temperature is August (26.2°C).
- Average low temperature in September: 24.3°C
The month with the highest average low temperature is April (26.2°C).
The coldest months (with the lowest average low temperature) are July and August (24.1°C).
Average pressure in September
Monrovia, Liberia
- Average pressure in September: 1013.1mbar
The month with the highest atmospheric pressure is July (1014.2mbar).
The month with the lowest atmospheric pressure is February (1010.6mbar).
Average wind speed in September
Monrovia, Liberia
- Average wind speed in September: 11.3km/h
The windiest month (with the highest average wind speed) is August (14.8km/h).
The calmest month (with the lowest average wind speed) is November (7.9km/h).
Average humidity in September
Monrovia, Liberia
- Average humidity in September: 86%
The month with the highest relative humidity is September (86%).
The month with the lowest relative humidity is January (76%).
Average rainfall in September
Monrovia, Liberia
- Average rainfall in September: 265mm
The wettest month (with the highest rainfall) is June (308mm).
The driest month (with the least rainfall) is January (31mm).
Average rainfall days in September
Monrovia, Liberia
- Average rainfall days in September: 29 days
The month with the highest number of rainy days is October (30.3 days).
The month with the least rainy days is January (14.8 days).
Average sea temperature in September
Monrovia, Liberia
- Average sea temperature in September: 27°C
The best month for swimming (with the highest average sea temperature) is May (28.9°C).
The coldest months (with the lowest average sea temperature) are August and September (27°C).
Average daylight in September /
Average sunshine in September
Monrovia, Liberia
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 12h and 30min).
The month with the shortest days is December (Average daylight: 11h and 48min).
- Average sunshine in September: 5h and 42min
The month with the most sunshine is January (Average sunshine: 9h and 18min).
The month with the least sunshine is August (Average sunshine: 3h and 54min).
Average sunshine days in September
Monrovia, Liberia
- Average sunshine days in September: 0.3 days
The month with the most sunshine days is January (14.3 days).
The month with the least sunshine days is September (0.3 days).
Average UV index in September
Monrovia, Liberia
- Average UV index in September: 6
The months with the highest UV index are January, February, March, April, May, October, November and December (UV index 7).
The months with the lowest UV index are June, July, August and September (UV index 6).
Average cloud cover in September
Monrovia, Liberia
- Average cloud cover in September: 62
The month with the most cloud cover is August (Cloud cover 76).
The month with the least cloud cover is January (Cloud cover 24).
Average visibility in September
Monrovia, Liberia
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, November and December (10km).
The months with the lowest visibility are June, July, August, September and October (9km).
