Waimalu
Hawaii, USA
Long-term weather forecast
Long-term weather forecast

October weather forecast and climate
Waimalu, HI

October, like September, in Waimalu, Hawaii, is another warm autumn month, with temperature in the range of an average low of 74.7°F (23.7°C) and an average high of 81.1°F (27.3°C).

Temperature

In October, the average high-temperature is essentially the same as in September - a still warm 81.1°F (27.3°C). In October, the average low-temperature is 74.7°F (23.7°C).

Heat index

In October, the average heat index is appraised at 85.8°F (29.9°C). Constant exposure and activity lead to possible fatigue. Prolonged exercise may result in heat cramps.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'feels like', 'real feel', or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (pregnancy, wind, metabolic differences), and activity. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In Waimalu, Hawaii, the average relative humidity is 75%.

Rainfall

October is the month with the most rainfall in Waimalu. Rain falls for 18.4 days and accumulates 2.09" (53mm) of precipitation.

Ocean temperature

August through October, with an average ocean temperature of 80.6°F (27°C), are months with the warmest seawater in Waimalu.
Note: Water temperature between 77°F (25°C) and 84.2°F (29°C) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

Daylight

In Waimalu, the average length of the day is 11.6h.

Sunshine

In Waimalu, the average sunshine is 7.8h.

UV index

January through August, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Waimalu. A UV Index value of 6 to 7 symbolizes a high health vulnerability from the exposure to the Sun's UV radiation for average individuals.
Note: In October, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the temperature in October in Waimalu?

In October, in Waimalu, the average high-temperature is 81.1°F (27.3°C), and the average low-temperature is 74.7°F (23.7°C). In October, the average heat index (a.k.a. 'feels like', 'apparent temperature'), that combines relative humidity and air temperature, is appraised at 85.8°F (29.9°C).

What is the average humidity in October in Waimalu?

The average relative humidity in October in Waimalu is 75%.

How much does it rain in Waimalu in October?

In Waimalu, during October, the rain falls for 18.4 days and regularly aggregates up to 2.09" (53mm) of precipitation.

What is the wettest month in Waimalu?

The month with the most rainfall in Waimalu, Hawaii, is October when the rain falls for 18.4 days and typically aggregates up to 2.09" (53mm) of precipitation.

What months are the ocean warmest in Waimalu?

Months with the warmest seawater in Waimalu are August through October, with an average ocean temperature of 80.6°F (27°C).

What is the water temperature in October in Waimalu?

In Waimalu, Hawaii, in October, the average water temperature is 80.6°F (27°C). For swimming, diving, and other water activities, temperatures between 77°F (25°C) and 84.2°F (29°C) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the average length of the day in October in Waimalu?

In October, the average length of the day in Waimalu, Hawaii, is 11.6h.

How long on average sun shines in October in Waimalu?

In October, the average sunshine in Waimalu, Hawaii, is 7.8h.

What is the month with the lowest UV index in Waimalu?

January through August, October through December, with an average maximum UV index of 6, are months with the lowest UV index in Waimalu, Hawaii.

What is the UV index reading in October in Waimalu?

In Waimalu, the average daily maximum UV index in October is 6. A UV Index of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV radiation.
Average temperature in October - Waimalu, HI
  • Average high temperature in October: 81.1°F

The warmest months (with the highest average high temperature) are August and September (82°F).
Months with the lowest average high temperature are February and March (75.4°F).

  • Average low temperature in October: 74.7°F

The month with the highest average low temperature is September (75°F).
The coldest month (with the lowest average low temperature) is February (68°F).

Average humidity in October - Waimalu, HI
  • Average humidity in October: 75%

Months with the highest relative humidity are February and December (76%).
Months with the lowest relative humidity are April, May, June and September (74%).

Average rainfall in October - Waimalu, HI
  • Average rainfall in October: 2.09"

The wettest month (with the highest rainfall) is October (2.09").
The driest month (with the least rainfall) is July (0.71").

Average rainfall days in October - Waimalu, HI
  • Average rainfall days in October: 18.4 days

The month with the highest number of rainy days is March (20 days).
The month with the least rainy days is January (13.5 days).

Average sea temperature in October - Waimalu, HI
  • Average sea temperature in October: 81°F

The best months for swimming (with the highest average sea temperature) are August, September and October (81°F).
The coldest months (with the lowest average sea temperature) are January, February, March and April (75°F).

Average daylight in October / Average sunshine in October - Waimalu, HI
  • Average daylight in October: 11.6h

The month with the longest days is June (Average daylight: 13.4h).
The month with the shortest days is December (Average daylight: 10.8h).

  • Average sunshine in October: 7.8h

The month with the most sunshine is June (Average sunshine: 9.9h).
Months with the least sunshine are November and December (Average sunshine: 6.3).

Average UV index in October - Waimalu, HI
  • Average UV index in October: 6

The month with the highest UV index is September (UV index 7).
Months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 6).