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

Monthly weather forecast and climate
Hilo, HI

January, like December, in Hilo, Hawaii, is another warm winter month, with average temperature ranging between min 63.9°F (17.7°C) and max 79°F (26.1°C). In Hilo, the average high-temperature in January is almost the same as in December - a still moderately hot 79°F (26.1°C). Weather in January »
February, the last month of the winter, in Hilo, is also a moderately hot month, with average temperature ranging between min 63.5°F (17.5°C) and max 78.8°F (26°C). The coldest month is February, with an average high-temperature of 78.8°F (26°C) and an average low-temperature of 63.5°F (17.5°C). Weather in February »

March, the first month of the spring, in Hilo, is also a moderately hot month, with average temperature ranging between max 79°F (26.1°C) and min 64.6°F (18.1°C). In Hilo, the average high-temperature in March is essentially the same as in February - a still moderately hot 79°F (26.1°C). Weather in March »

April, the same as March, is another warm spring month in Hilo, Hawaii, with average temperature ranging between max 79°F (26.1°C) and min 65.5°F (18.6°C). In Hilo, Hawaii, the average high-temperature in April remains equal as in March - a still warm 79°F (26.1°C). Weather in April »

May, the last month of the spring, in Hilo, is also a moderately hot month, with average temperature varying between 66.9°F (19.4°C) and 80.6°F (27°C). In Hilo, Hawaii, the average high-temperature is practically the same as in April - a still warm 80.6°F (27°C). Weather in May »

The first month of the summer, June, is still a warm month in Hilo, Hawaii, with average temperature ranging between min 68.2°F (20.1°C) and max 82.2°F (27.9°C). In Hilo, the average high-temperature is relatively the same as in May - a still moderately hot 82.2°F (27.9°C). Weather in June »

July, like June, in Hilo, Hawaii, is a moderately hot summer month, with average temperature varying between 82.8°F (28.2°C) and 69.3°F (20.7°C). In July, the average high-temperature is practically the same as in June - a still moderately hot 82.8°F (28.2°C). Weather in July »

August, the last month of the summer, in Hilo, is also a moderately hot month, with temperature in the range of an average high of 83.1°F (28.4°C) and an average low of 69.3°F (20.7°C). In August, the average high-temperature is almost the same as in July - a still warm 83.1°F (28.4°C). Weather in August »

September, the first month of the autumn, in Hilo, is still a warm month, with average temperature ranging between min 69.6°F (20.9°C) and max 83.3°F (28.5°C). September is the warmest month, with an average high-temperature of 83.3°F (28.5°C) and an average low-temperature of 69.6°F (20.9°C). Weather in September »

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

November, the last month of the autumn, in Hilo, is also a moderately hot month, with average temperature fluctuating between 67.3°F (19.6°C) and 80.8°F (27.1°C). In Hilo, the average high-temperature is almost the same as in October - a still moderately hot 80.8°F (27.1°C). Weather in November »

The first month of the winter, December, is also a moderately hot month in Hilo, Hawaii, with temperature in the range of an average low of 65.1°F (18.4°C) and an average high of 79.3°F (26.3°C). In Hilo, the average high-temperature is almost the same as in November - a still warm 79.3°F (26.3°C). Weather in December »

How many days does it rain in Hilo?

In Hilo, during the entire year, the rain falls for 272.1 days and collects up to 84.4" (2144mm) of precipitation.

What is the coldest month in Hilo?

With an average high-temperature of 78.8°F (26°C) and an average low-temperature of 63.5°F (17.5°C), February is the coldest month.

What is the least humid month in Hilo?

The least humid month in Hilo is February, with an average relative humidity of 76%.

What is the wettest month in Hilo?

March is the month with the most rainfall. Rain falls for 21.4 days and accumulates 10.6" (270mm) of precipitation.

When is the ocean coldest in Hilo?

With an average ocean temperature of 75.7°F (24.3°C), March is the month with the coldest seawater. Depending on a person's sensitivity to cold, with regards to sunshine, wind, and air temperature, a quick swim in 75.7°F (24.3°C) water may be enjoyable.

What is the month with the highest UV index in Hilo?

March through September, with an average maximum UV index of 12, are months with the highest UV index.

What is the driest month in Hilo?

The month with the least rainfall in Hilo, Hawaii, is June when the rain falls for 25.1 days and typically collects 4.3" (108mm) of precipitation.

When are the longest days in Hilo?

The month with the longest days is June, with an average of 13.3h of daylight.

What month has the most sunshine in Hilo?

The month with the most sunshine is June, with an average of 5.9h of sunshine.

What is the warmest month in Hilo?

With an average high-temperature of 83.3°F (28.5°C) and an average low-temperature of 69.6°F (20.9°C), September is the warmest month in Hilo.

What is the month with the warmest ocean in Hilo?

With an average ocean temperature of 79.3°F (26.3°C), September is the month with the warmest seawater in Hilo, Hawaii. 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 most humid month in Hilo?

The most humid month in Hilo is November, with an average relative humidity of 80.3%.

What is the month with the least sunshine in Hilo?

With an average of 3.8h of sunshine, November has the least sunshine of the year in Hilo, Hawaii.

What is the month with the shortest days in Hilo?

With an average of 11h of daylight, December has the shortest days of the year in Hilo.

When is the lowest UV index in Hilo?

With an average maximum UV index of 7, December is the month with the lowest UV index in Hilo, Hawaii.
Average temperature - Hilo, HI
Average humidity - Hilo, HI
Average rainfall - Hilo, HI
Average rainfall days - Hilo, HI

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 - Hilo, HI

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 / Average sunshine - Hilo, HI
Average UV index - Hilo, HI

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).