Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
Naalehu transitions into January recording an average high-temperature of a still pleasant 69.4°F (20.8°C), closely aligning with the preceding month's temperature. Naalehu's average low temperature, barely cooler than the daytime high, steadies at an enjoyable 65.1°F (18.4°C) during January.Humidity
In January, the average relative humidity is 75%.Rainfall
January is the month with the least rainfall. Rain falls for 10.8 days and accumulates 0.75" (19mm) of precipitation.Daylight
In Naalehu, the average length of the day in January 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 6:14 pm HST.
Sunshine
The average sunshine in January 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 estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 5 during January translates into these guidelines:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Experience reduced UV exposure by about half when donning a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in January?
What is the average humidity in January?
What is the driest month?
How many days does it rain in January?
How many hours of daylight does Naalehu have in January?
When are sunrise and sunset in January?
How many hours of sunshine does Naalehu have in January?
What is the month with the lowest UV index?
What is the UV index reading in January?
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).
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).
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).
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%).
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").
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).
Average daylight in January /
Average sunshine in January
Naalehu, HI
- Average daylight in January: 11h and 1min
The month with the longest days is June (Average daylight: 13h and 18min).
The month with the shortest days is December (Average daylight: 11h and 0min).
- 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).
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).
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).
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).
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).
Naalehu, Hawaii, USA
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