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 sea temperature 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
The commencement of September records an average high-temperature of a still moderately hot 28.5°C (83.3°F), barely varying from August's 28.4°C (83.1°F). The average temperature in Honiara during September nights dips to a still moderately hot 23.4°C (74.1°F).Heat index
In September, the heat index is computed to be a hot 34°C (93.2°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.Factoring in the heat index, values are geared towards shaded areas with light breezes. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', arises from combining readings of air temperature and relative moisture content. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Young ones are generally at greater risk than adults due to their limited sweating ability. In addition, their large skin surface relative to their small bodies and higher heat production from their activities add to their vulnerability.
Humidity
The months with the lowest humidity in Honiara are August through November, with an average relative humidity of 83%.Rainfall
In Honiara, in September, during 26 rainfall days, 162mm (6.38") of precipitation is typically accumulated. Throughout the year, there are 327.8 rainfall days, and 2474mm (97.4") of precipitation is accumulated.Sea temperature
In Honiara, in September, the average water temperature is 28.8°C (83.8°F).Note: For engaging in any water activities, temperatures from 25°C (77°F) to 29°C (84.2°F) are viewed as outstanding and exceptionally pleasing for prolonged durations.
Daylight
In Honiara, the average length of the day in September is 12h and 3min.On the first day of the month, sunrise is at 06:22 and sunset at 18:18. On the last day of September, sunrise is at 06:04 and sunset at 18:15 +11.
Sunshine
In Honiara, the average sunshine in September is 8h.UV index
The months with the highest UV index are April, May, July and September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.Note: In September, a regular UV index of 7 translates into these guidelines:
Undertake precautions and comply with sun safety standards. Protection from skin and eye injury is vital. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear. Stay cautious! Sand and water reflections increase UV radiation potency.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in Honiara in September?
What is the least humid month?
What is the average humidity in September?
How much does it rain in September?
What is the water temperature in September?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Honiara have in September?
What are the months with the highest UV index?
What is the UV index reading in September in Honiara?
Average temperature in September
Honiara, Solomon Islands
- Average high temperature in September: 28.5°C
The warmest month (with the highest average high temperature) is December (29.3°C).
The month with the lowest average high temperature is July (27.8°C).
- Average low temperature in September: 23.4°C
The month with the highest average low temperature is January (24.2°C).
The coldest months (with the lowest average low temperature) are August and September (23.4°C).
Average pressure in September
Honiara, Solomon Islands
- Average pressure in September: 1010.4mbar
The month with the highest atmospheric pressure is August (1010.5mbar).
The month with the lowest atmospheric pressure is January (1006.9mbar).
Average wind speed in September
Honiara, Solomon Islands
- Average wind speed in September: 9.9km/h
The windiest month (with the highest average wind speed) is July (11.3km/h).
The calmest month (with the lowest average wind speed) is December (6km/h).
Average humidity in September
Honiara, Solomon Islands
- Average humidity in September: 83%
The months with the highest relative humidity are January, March and April (85%).
The months with the lowest relative humidity are August, September, October and November (83%).
Average rainfall in September
Honiara, Solomon Islands
- Average rainfall in September: 162mm
The wettest months (with the highest rainfall) are March and December (299mm).
The driest month (with the least rainfall) is June (125mm).
Average rainfall days in September
Honiara, Solomon Islands
- Average rainfall days in September: 26 days
The months with the highest number of rainy days are January, March and December (29.3 days).
The month with the least rainy days is August (24.3 days).
Average sea temperature in September
Honiara, Solomon Islands
- Average sea temperature in September: 28.8°C
The best month for swimming (with the highest average sea temperature) is April (30.3°C).
The coldest month (with the lowest average sea temperature) is August (28.6°C).
Average daylight in September /
Average sunshine in September
Honiara, Solomon Islands
- Average daylight in September: 12h and 1min
The month with the longest days is December (Average daylight: 12h and 42min).
The month with the shortest days is June (Average daylight: 11h and 36min).
- Average sunshine in September: 8h and 0min
The month with the most sunshine is November (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 6h and 48min).
Average sunshine days in September
Honiara, Solomon Islands
- Average sunshine days in September: 2.4 days
The month with the most sunshine days is August (4 days).
The month with the least sunshine days is January (0.3 days).
Average UV index in September
Honiara, Solomon Islands
- Average UV index in September: 7
The months with the highest UV index are April, May, July and September (UV index 7).
The months with the lowest UV index are January, February, March, June, August, October, November and December (UV index 6).
Average cloud cover in September
Honiara, Solomon Islands
- Average cloud cover in September: 44
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is May (Cloud cover 41).
Average visibility in September
Honiara, Solomon Islands
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Honiara, Solomon Islands
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