Rennell Island
Solomon Islands
Long-term weather forecast
Long-term weather forecast

September weather forecast and Climate
Rennell Island, Solomon Islands

  • The average high temperature in September: 30°C

Warmest months (with the highest average high temperature) are January, February, October and November (31°C).
The month with the lowest average high temperature is July (29°C).

  • The average low temperature in September: 22°C

Months with the highest average low temperature are January, February, March, April, May, October, November and December (23°C).
Coldest months (with the lowest average low temperature) are June, July, August and September (22°C).

  • The average rainfall in September: 176mm

The wettest month (with the highest rainfall) is March (330mm).
The driest month (with the lowest rainfall) is June (166mm).

  • The average rainfall days in September: 14 days

The month with the highest number of rainy days is March (20 days).
Months with the lowest number of rainy days are August, September and November (14 days).

  • The average sea temperature in September: 28°C

Best months for swimming (with the highest average sea temperature) are January and February (30°C).
Coldest months (with the lowest average sea temperature) are June, July, August, September and October (28°C).

  • The average daylight in September: 12h

Months with the longest days are January, November and December (Average daylight: 13h).
The month with shortest days is June (Average daylight: 11h).

  • The average sunshine in September: 6h

Months with most sunshine are August, October and November (Average sunshine: 7h).
Months with least sunshine are January, February, March, April, May, June, July, September and December (Average sunshine: 6).

  • The average UV index in September: 12

Months with the highest UV index are January, February, March, April, September, October, November and December (UV index 12).
Months with the lowest UV index are June and July (UV index 9).