September weather forecast
Harper, Liberia

September in Harper signals the slow transition towards the end of the rainy season, with rainfall volumes expectedly seeing another spike. The weather continues to be predominantly warm during the day and the night alike. September experiences a rainfall increase, rising to 267mm (10.51"), making it significantly wetter than the preceding August. The sea temperature also begins to rise slightly, enhancing the overall appeal for sea-based activities. September, therefore, maintains the existing trend of ample rainfall and warm temperatures, reinforcing Harper's enduring tropical atmosphere.

Temperature

The beginning of September in Harper reveals an average high-temperature of a still moderately hot 27°C (80.6°F), showing minimal deviation from the previous month. Harper registers an average low-temperature of 22°C (71.6°F) throughout September, a modest decrease from its daytime highs.

Rainfall

In Harper, in September, it is raining for 22 days, with typically 267mm (10.51") of accumulated precipitation. Throughout the year, there are 174 rainfall days, and 2304mm (90.71") of precipitation is accumulated.

Sea temperature

In September, the average sea temperature is 26.3°C (79.3°F).
Note: In water activities such as swimming and diving, temperatures from 25°C (77°F) to 29°C (84.2°F) are deemed highly pleasurable for extended periods without any unease.

Daylight

The average length of the day in September is 12h and 8min.
On the first day of September, sunrise is at 06:24 and sunset at 18:36. On the last day of the month, sunrise is at 06:18 and sunset at 18:23 GMT.

Sunshine

June through September, with an average of 3h of sunshine, are months with the least sunshine.

UV index

January through May, August through November, with an average maximum UV index of 12, are months with the highest UV index in Harper. A UV Index estimate of 11, and higher, represents an excessive health risk from unsafe exposure to UV radiation for average individuals.
Note: The daily high UV index of 12 during September translates into the following recommendations:
Take all required precautions, as unprotected skin and eyes can burn in minutes. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. After a swim or an outdoor workout, generously apply and reapply a broad-spectrum SPF 30+ sunscreen. Notice! Sand and water reflections contribute to a stronger UV exposure.