December weather forecast
Honiara, Solomon Islands

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A tropical white sand beach in Honiara, in the glorious Solomon Islands, with palm trees and shrubs along the edge
A tropical white sand beach in Honiara, in the glorious Solomon Islands, with palm trees and shrubs along the edge

Weather in December

Honiara, in December, presents consistent high temperatures and increased rainfall. The month registers the second-highest rainfall of 299mm (11.77"), akin to early wet season months. Honiara experiences its longest daylight hours, maximizing the time for outdoor enjoyment amidst higher rainfall. The sea temperature peaks in December, marking it as a great time for underwater expeditions. In spite of high humidity and rainfall, the year ends on a warm and festive note.

Temperature

December stands out as Honiara's warmest month, with temperatures ranging between an average high of 29.3°C (84.7°F) and a low of 24°C (75.2°F).

Heat index

The heat index value for December is computed to be a sweltering 37°C (98.6°F). Implement more safety precautions, heat cramps and heat exhaustion may happen. Persistent activity could induce heatstroke.
Heat index readings emphasize conditions of light breezes and shaded spots. The heat index has the potential to rise by 15 Fahrenheit (8 Celsius) degrees with direct sunshine exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', determines the feeling of heat when you account for the relative humidity. A person's impression of weather can be shaped by several aspects, among them metabolic variations, pregnancy, and levels of physical activity. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. During high air temperature and humidity (high heat index), the process of perspiration is hindered, intensifying the sensation of heat. Heat-related disorders may develop if heat gain in the body overshadows its cooling capacity, leading to elevated temperatures.

Humidity

The average relative humidity in December is 84%.

Rainfall

The wettest months in Honiara are March and December, with an average 299mm (11.77") of rainfall.

Sea temperature

In December, the average sea temperature is 30.2°C (86.4°F).
Note: Water temperatures exceeding 30°C (86°F) can be viewed as uncomfortable, especially when the primary intention is to cool down from intense heat.

Daylight

With an average of 12h and 42min of daylight, December has the longest days of the year.
On the first day of December, sunrise is at 05:50 and sunset at 18:28. On the last day of the month, sunrise is at 06:03 and sunset at 18:43 +11.

Sunshine

In Honiara, the average sunshine in December is 8.9h.

UV index

The months with the lowest UV index are January through March, June, August, October through December, with an average maximum UV index of 6. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: In December, the UV index of 6 transforms into the following advice:
Conform to measures and uphold sun safety traditions. Warding off skin and eye harm is necessary. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Boost your sun resistance with garments that are densely woven yet spacious. Beware! Reflecting off water and sand, UV rays are much stronger.

Frequently asked questions

What are the warmest months?

Honiara witnesses the warmest weather in December, with temperatures averaging a high of 29.3°C (84.7°F) and a low of 24°C (75.2°F).

How hot does it get in Honiara in December?

December temperatures vary between a high-temperature of 29.3°C (84.7°F) and a low-temperature of 24°C (75.2°F). The average heat index (a.k.a. 'felt air temperature', 'real feel'), which combines relative humidity and air temperature, in December is computed to be 37°C (98.6°F).

What is the average humidity in December?

In December, the average relative humidity is 84%.

What is the rainiest month?

The months with the most rainfall are March and December, with an average 299mm (11.77") of precipitation.

How many days does it rain in December?

In December, the rain falls for 29.3 days. Throughout December, 299mm (11.77") of precipitation is accumulated.

What is the sea water temperature in December?

In Honiara, the average seawater temperature in December is 30.2°C (86.4°F). The surface water temperatures above 30°C (86°F) are arguably considered as unpleasant for swimming, and any intense water activity, as the refreshing effect of water is missing.

When are the longest days?

December has the longest days of the year, with an average of 12h and 42min of daylight.

How many hours of daylight does Honiara have in December?

In December, the average day length is 12h and 40min.

What time are sunrise and sunset in December?

In December, on the first day of the month, sunrise is at 05:50 and sunset at 18:28. On the last day of the month, sunrise is at 06:03 and sunset at 18:43 +11.

How many hours of sunshine does Honiara have in December?

In December, the average sunshine duration is 8.9h.

What is the month with the lowest UV index?

The months with the lowest UV index are January through March, June, August, October through December, with an average maximum UV index of 6.

What is the UV index reading in December?

In December, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unsafe exposure to Sun's UV rays.

Average temperature in December
Honiara, Solomon Islands

Average temperature in December - Honiara, Solomon Islands
  • Average high temperature in December: 29.3°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 December: 24°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 December
Honiara, Solomon Islands

Average pressure in December - Honiara, Solomon Islands
  • Average pressure in December: 1007.2mbar

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 December
Honiara, Solomon Islands

Average wind speed in December - Honiara, Solomon Islands
  • Average wind speed in December: 6km/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 December
Honiara, Solomon Islands

Average humidity in December - Honiara, Solomon Islands
  • Average humidity in December: 84%

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 December
Honiara, Solomon Islands

Average rainfall in December - Honiara, Solomon Islands
  • Average rainfall in December: 299mm

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 December
Honiara, Solomon Islands

Average rainfall days in December - Honiara, Solomon Islands
  • Average rainfall days in December: 29.3 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 December
Honiara, Solomon Islands

Average sea temperature in December - Honiara, Solomon Islands
  • Average sea temperature in December: 30.2°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 December /
Average sunshine in December
Honiara, Solomon Islands

Average daylight in December / Average sunshine in December - Honiara, Solomon Islands
  • Average daylight in December: 12h and 4min

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 December: 8h and 5min

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 December
Honiara, Solomon Islands

Average sunshine days in December - Honiara, Solomon Islands
  • Average sunshine days in December: 1.2 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 December
Honiara, Solomon Islands

Average UV index in December - Honiara, Solomon Islands
  • Average UV index in December: 6

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 December
Honiara, Solomon Islands

Average cloud cover in December - Honiara, Solomon Islands
  • Average cloud cover in December: 46

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 December
Honiara, Solomon Islands

Average visibility in December - Honiara, Solomon Islands
  • Average visibility in December: 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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