January weather forecast
Naalehu, HI

Weather in January

January, the same as December, in Naalehu, Hawaii, is an agreeable winter month, with an average temperature varying between 65.1°F (18.4°C) and 69.4°F (20.8°C).

Temperature

In January, the average high-temperature is practically the same as in December - a still agreeable 69.4°F (20.8°C). The average low-temperature, in January, is 65.1°F (18.4°C).

Humidity

In January, the average relative humidity in Naalehu is 75%.

Rainfall

The month with the least rainfall is January, when the rain falls for 10.8 days and typically collects 0.75" (19mm) of precipitation.

Daylight

In January, the average length of the day is 11h and 8min.
On the first day of January, sunrise is at 6:55 am and sunset at 5:56 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:15 pm HST.

Sunshine

In January, the average sunshine in Naalehu is 9h.

UV index

January through April, November and December, with an average maximum UV index of 5, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: In January, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the average humidity in January in Naalehu?

The average relative humidity in January is 75%.

What is the driest month in Naalehu?

January is the month with the least rainfall. Rain falls for 10.8 days and accumulates 0.75" (19mm) of precipitation.

How many days does it rain in January in Naalehu?

In Naalehu, during January, the rain falls for 10.8 days and regularly aggregates up to 0.75" (19mm) of precipitation.

How many hours of daylight does Naalehu have in January?

The average day length in January is 11h and 8min.

When are sunrise and sunset in January in Naalehu?

On the first day of January in Naalehu, sunrise is at 6:55 am and sunset at 5:56 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:15 pm HST.

How many hours of sunshine does Naalehu have in January?

In Naalehu, Hawaii, the average sunshine duration in January is 9h.

When is the lowest UV index in Naalehu?

January through April, November and December, with an average maximum UV index of 5, are months with the lowest UV index.

How high is the UV index in January in Naalehu?

The average daily maximum UV index in January in Naalehu is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Naalehu, HI

Average temperature in January - Naalehu, HI
  • Average high temperature in January: 69.4°F

The warmest months (with the highest average high temperature) are August and October (73.2°F).
The month with the lowest average high temperature is February (68.9°F).

  • Average low temperature in January: 65.1°F

The month with the highest average low temperature is October (70°F).
The coldest month (with the lowest average low temperature) is March (64.8°F).

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Average pressure in January
Naalehu, HI

Average pressure in January - Naalehu, HI
  • Average pressure in January: 29.99"Hg

The month with the highest atmospheric pressure is April (30.04"Hg).
The months with the lowest atmospheric pressure are September and October (29.96"Hg).

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Average wind speed in January
Naalehu, HI

Average wind speed in January - Naalehu, HI
  • Average wind speed in January: 5.5mph

The windiest month (with the highest average wind speed) is May (6.3mph).
The calmest month (with the lowest average wind speed) is December (5.3mph).

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Average humidity in January
Naalehu, HI

Average humidity in January - Naalehu, HI
  • Average humidity in January: 75%

The months with the highest relative humidity are June, July, August and September (81%).
The month with the lowest relative humidity is February (73%).

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Average rainfall in January
Naalehu, HI

Average rainfall in January - Naalehu, HI
  • Average rainfall in January: 0.75"

The wettest month (with the highest rainfall) is September (1.81").
The driest month (with the least rainfall) is January (0.75").

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Average rainfall days in January
Naalehu, HI

Average rainfall days in January - Naalehu, HI
  • Average rainfall days in January: 10.8 days

The month with the highest number of rainy days is August (21.8 days).
The month with the least rainy days is January (10.8 days).

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Average daylight in January /
Average sunshine in January
Naalehu, HI

Average daylight in January / Average sunshine in January - Naalehu, HI
  • Average daylight in January: 11h and 8min

The month with the longest days is June (Average daylight: 13h and 16min).
The month with the shortest days is December (Average daylight: 11h and 1min).

  • Average sunshine in January: 9h and 0min

The month with the most sunshine is May (Average sunshine: 10h and 42min).
The months with the least sunshine are November and December (Average sunshine: 7h and 18min).

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Average sunshine days in January
Naalehu, HI

Average sunshine days in January - Naalehu, HI
  • Average sunshine days in January: 12.7 days

The month with the most sunshine days is January (12.7 days).
The month with the least sunshine days is May (3.2 days).

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Average UV index in January
Naalehu, HI

Average UV index in January - Naalehu, HI
  • Average UV index in January: 5

The months with the highest UV index are May, June, July, August, September and October (UV index 6).
The months with the lowest UV index are January, February, March, April, November and December (UV index 5).

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Average cloud cover in January
Naalehu, HI

Average cloud cover in January - Naalehu, HI
  • Average cloud cover in January: 15

The month with the most cloud cover is June (Cloud cover 31).
The month with the least cloud cover is January (Cloud cover 15).

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Average visibility in January
Naalehu, HI

Average visibility in January - Naalehu, HI
  • Average visibility in January: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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