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

October weather forecast and climate
Hilo, HI

October, the same as September, is a moderately hot autumn month in Hilo, Hawaii, with temperature in the range of an average low of 69.1°F (20.6°C) and an average high of 82.6°F (28.1°C).

Temperature

In Hilo, Hawaii, the average high-temperature is relatively the same as in September - a still warm 82.6°F (28.1°C). In October, the average low-temperature is 69.1°F (20.6°C).

Humidity

The average relative humidity in October is 80%.

Rainfall

In Hilo, it is raining for 23.6 days, with typically 5.5" (139mm) of accumulated precipitation. In Hilo, during the entire year, the rain falls for 272.1 days and collects up to 84.4" (2144mm) of precipitation.

Ocean temperature

In Hilo, the average water temperature is 79.2°F (26.2°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.

Daylight

In Hilo, Hawaii, the average length of the day is 11.7h.

Sunshine

In Hilo, the average sunshine is 4.4h.

UV index

The average daily maximum UV index in Hilo, Hawaii, is 10. A UV Index value of 8 to 10 symbolizes a very high health risk from unsafe exposure to the UV radiation for ordinary individuals.
The daily maximum UV index of 10 in October interpret into the following advice:
Take extra precautions. Protection against sun damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. 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. A broad-spectrum sunscreen of SPF 30+ should be liberally applied and re-applied every two hours, and immediately after an outdoor workout or a swim. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What is the temperature in October in Hilo?

The average high-temperature, in October, in Hilo, Hawaii, is 82.6°F (28.1°C), while the average low-temperature is 69.1°F (20.6°C).

What is the average humidity in October in Hilo?

The average relative humidity in October is 80%.

How many days does it rain in October in Hilo?

In Hilo, during October, the rain falls for 23.6 days and regularly aggregates up to 5.5" (139mm) of precipitation.

What is the water temperature in October in Hilo?

In October, the average ocean temperature is 79.2°F (26.2°C). For any water activity, surface water temperatures between 77°F (25°C) and 84.2°F (29°C) are considered as excellent and extremely pleasant for lengthened periods.

How many hours of daylight does Hilo have in October?

The average length of the day in October in Hilo is 11.7h.

How long on average sun shines in October in Hilo?

In October, the average sunshine is 4.4h.

How high is the UV index in October in Hilo?

The average daily maximum UV index in October is 10. A UV Index value of 8 to 10 symbolizes a very high health vulnerability from the exposure to the Sun's UV rays.
Average temperature in October - Hilo, HI
  • Average high temperature in October: 82.6°F

The warmest month (with the highest average high temperature) is September (83.3°F).
The month with the lowest average high temperature is February (78.8°F).

  • Average low temperature in October: 69.1°F

The month with the highest average low temperature is September (69.7°F).
The coldest month (with the lowest average low temperature) is February (63.5°F).

Average humidity in October - Hilo, HI
  • Average humidity in October: 80%

The month with the highest relative humidity is November (80.3%).
The month with the lowest relative humidity is February (76%).

Average rainfall in October - Hilo, HI
  • Average rainfall in October: 5.5"

The wettest month (with the highest rainfall) is March (10.6").
The driest month (with the lowest rainfall) is June (4.3").

Average rainfall days in October - Hilo, HI
  • Average rainfall days in October: 23.6 days

Months with the highest number of rainy days are July and August (26.8 days).
The month with the lowest number of rainy days is February (15.8 days).

Average sea temperature in October - Hilo, HI
  • Average sea temperature in October: 79.1°F

The best month for swimming (with the highest average sea temperature) is September (79.3°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).

Average daylight in October / Average sunshine in October - Hilo, HI
  • Average daylight in October: 11.7h

The month with the longest days is June (Average daylight: 13.3h).
The month with shortest days is December (Average daylight: 11h).

  • Average sunshine in October: 4.4h

The month with most sunshine is June (Average sunshine: 5.9h).
The month with least sunshine is November (Average sunshine: 3.8h).

Average UV index in October - Hilo, HI
  • Average UV index in October: 10

Months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 7).