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Contents
- The climate of Kahului
- The best time to visit Kahului
- The worst time to visit Kahului
- Spring weather in Kahului
- Summer weather in Kahului
- Autumn weather in Kahului
- Winter weather in Kahului
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average sea temperature
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
The climate of Kahului
Kahului, Hawaii, characterized under the Köppen climate classification as Af, displays a prominent Tropical Rainforest climate. Located in the Pacific ocean, the region sees relatively consistent patterns of temperature, humidity, and rainfall throughout the year, making it an evergreen destination.
The usual range for average high temperatures lies from 73.9°F (23.3°C) to 79.9°F (26.6°C), reflecting the warm and lush nature of the area. The lowest average temperatures tend to linger from 70.7°F (21.5°C) to 76.5°F (24.7°C) - a modest difference, pointing towards the region's stable thermal conditions. Kahului is no stranger to humidity - a consistent humidity trend of 74% to 76% prevails throughout the year, reinforcing the damp, tropical climate.
Precipitation in Kahului ranges from a low of 0.2" (5mm) to a high of 0.87" (22mm) monthly. This variation in rainfall is frequent throughout the year, with minimal months showing an absence of rain. The area experiences 6.6 to 11.9 days of rainfall on average, substantiating a healthy volume of rainfall spread through the year rather than concentrated in certain months. An important factor to highlight is the visibility in Kahului - stable at 6 miles throughout the year, indicating clear and unobstructed sightlines for most of the year.
The usual range for average high temperatures lies from 73.9°F (23.3°C) to 79.9°F (26.6°C), reflecting the warm and lush nature of the area. The lowest average temperatures tend to linger from 70.7°F (21.5°C) to 76.5°F (24.7°C) - a modest difference, pointing towards the region's stable thermal conditions. Kahului is no stranger to humidity - a consistent humidity trend of 74% to 76% prevails throughout the year, reinforcing the damp, tropical climate.
Precipitation in Kahului ranges from a low of 0.2" (5mm) to a high of 0.87" (22mm) monthly. This variation in rainfall is frequent throughout the year, with minimal months showing an absence of rain. The area experiences 6.6 to 11.9 days of rainfall on average, substantiating a healthy volume of rainfall spread through the year rather than concentrated in certain months. An important factor to highlight is the visibility in Kahului - stable at 6 miles throughout the year, indicating clear and unobstructed sightlines for most of the year.
The best time to visit Kahului
Based on the availability of optimal weather conditions, May through July offer the best times to visit Kahului. During these months, the island city experiences an average high temperature of 77°F (25°C) to 78.5°F (25.8°C), an average rainfall of 0.2" (5mm) to 0.39" (10mm), and an average of 6.6 to 8.5 days of rainfall. With over 11 hours of daylight, around 11.5 hours of sunshine, and a consistent visibility of 6 miles, these combine to provide the ideal conditions for outdoor activities and exploration.
The worst time to visit Kahului
While Kahului's weather presents relatively mild fluctuations, the months requiring a bit more caution, are March and December. In these months, rainfall reaches its peak with up to 0.87" (22mm) of rainfall spread across 9.2 to 11.9 days. Despite these rainy periods, the temperatures stay relatively mild between 73.9°F (23.3°C) to 74.7°F (23.7°C). However, potential visitors may want to consider these weather conditions before planning their trip.
Spring weather in Kahului
Spring descends upon Kahului between March and May, presenting temperatures varying from 70.7°F (21.5°C) to 73.4°F (23°C). Rainfall during this season averages between 0.63" (16mm) to 0.87" (22mm), with the number of rainy days being 8.1 to 11.9. As Spring advances, weather conditions gradually improve with increasing hours of sunlight, making it a pleasant period to experience Kahului's natural beauty.
Summer weather in Kahului
Kahului's summer spans June through August, characterized by average temperatures from 74.7°F (23.7°C) to 76.3°F (24.6°C), and some of the least amounts of rainfall - ranging from 0.2" (5mm) to 0.43" (11mm). The city experiences longer sunlight hours, reaching 13.4 hours in June and slowly decreasing towards August. Along with increased daylight comes an increased UV index, ensuring ample opportunity for those looking to soak up the tropical sun.
Autumn weather in Kahului
Autumn in Kahului lasts from September through November. The temperature, on average, lies from 74.8°F (23.8°C) to 76.5°F (24.7°C), while the rainfall varies from 0.39" (10mm) to 0.55" (14mm). This season experiences fewer hours of daylight and sunshine, but maintains a similar level of humidity compared to other seasons. Despite the rains, the climate remains relatively warm and pleasant.
Winter weather in Kahului
Winter arrives in Kahului in December, with temperatures dipping slightly from 72.9°F (22.7°C) to 75.7°F (24.3°C). Rainfall during this season shows a noticeable increase reaching up to 0.87" (22mm), spread over 7.7 to 9.2 days. Daylight hours experience a minor reduction, but this does not significantly affect the overall pleasant winter climate of Kahului. Along with these, the sea temperature dips to 76.8°F (24.9°C), making it a season prioritized more towards relaxation than water-based activities.
Weather in January
Being the first month of the year, January in Kahului, Hawaii, is characterized by a mild and pleasant weather pattern. Temperatures oscillate between 71.6°F (22°C) and 74.7°F (23.7°C). This makes January ideal for beachside relaxation, as the gentle breeze complements the warm air rather perfectly. Weather in January »
Weather in February
Proceeding into February, there is a slight decline in temperatures which are now moving from 70.7°F (21.5°C) to 73.9°F (23.3°C). Notably, this month perceive an escalation in rainfall frequency as well. Nevertheless, the weather remains fairly congenial for explorations across the city. Weather in February »
Weather in March
When it comes to March, the weather undergoes another mild change, but maintains its charming disposition. Though the frequency of rainy days experiences a surge, it still remains within manageable boundaries. With temperatures oscillating from 70.7°F (21.5°C) to 74.3°F (23.5°C), the days continue being agreeably warm. Weather in March »
Weather in April
Investigating the weather conditions in April, it becomes evident that the rise in temperatures is discernible as they now range between 72.1°F (22.3°C) to 75.6°F (24.2°C). Meanwhile, the city witnesses a drop in rain showers which certainly broadens the prospects for outdoor recreations. Weather in April »
Weather in May
By the time May arrives, Kahului has already begun to display the signs of the approaching tropical summer. The increased daylight hours coupled with longer sunshine duration facilitate longer days packed with outdoor activities. In this month, temperatures swing from 73.4°F (23°C) to a warming 77°F (25°C). Weather in May »
Weather in June
June can be regarded as the onset of the true tropical summer in Kahului, with temperatures sailing from 74.7°F (23.7°C) to 77.9°F (25.5°C). Abundant sunshine, lenient winds, and controlled humidity accentuate the allure of the beachside city. Weather in June »
Weather in July
July in Kahului is the epitome of tropical summer, with the mercury hovering between 75.6°F (24.2°C) and 78.8°F (26°C). Brilliant sunshine embellishes the city, and the sea surface temperature rises slightly, making water-related activities all the more enticing. Weather in July »
Weather in August
With temperatures soaring from 76.3°F (24.6°C) to 79.5°F (26.4°C) in August, the tropical vibe intensifies. But Kahului doesn't let the heat become overbearing thanks to its regularly flowing breeze. Humidity escalates, albeit marginally, but it hardly leads to discomfort. Weather in August »
Weather in September
September displays a splendid balance between cool winds and warmth with temperature scales swaying between 76.1°F (24.5°C) and 79.9°F (26.6°C). Although this month sees a mild amplification in rainfall, it's hardly a reason for concern. Weather in September »
Weather in October
Moving on to October, there is a minor dip in the temperatures, now spanning from 76.5°F (24.7°C) to 79.3°F (26.3°C). The trend of gentle winds caressing the city persists, and the overall humidity remains, well, unchanging. Weather in October »
Weather in November
November in Kahului displays an evident transition from the tropical conditions to cooler winds. The weather adorns a refreshing hue with temperatures varying between 74.8°F (23.8°C) and 77.7°F (25.4°C). Though rain showers become more frequent, the city's overall aura stays heartening, courtesy of the benevolent sunshine. Weather in November »
Weather in December
December brings the year to a close with a cool demeanor, as temperatures fluctuate from 72.9°F (22.7°C) to 75.7°F (24.3°C). While the rainfall frequency escalates, it's quite well-balanced by the city's prolonged sunshine hours. Weather in December »
Updated: Jul 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the least humid months?
The months with the lowest humidity are January and February, with an average relative humidity of 74%.
How much does it rain?
In Kahului, during the entire year, the rain falls for 103.4 days and collects up to 6.57" (167mm) of precipitation.
What are the months with the lowest UV index?
January through June, November and December, with an average maximum UV index of 6, are months with the lowest UV index.
What are the coldest months?
With average temperatures fluctuating between a high of 73.9°F (23.3°C) and a low of 70.7°F (21.5°C), February stands out as the coldest month.
What is the rainiest month?
The months with the most rainfall are March and December, with an average 0.87" (22mm) of precipitation.
What is the month with the coldest ocean?
March is the month with the coldest seawater, with an average ocean temperature of 75.7°F (24.3°C).
What is the driest month?
June is the month with the least rainfall. Rain falls for 6.6 days and accumulates 0.2" (5mm) of precipitation.
When are the longest days in Kahului?
June has the longest days of the year, with an average of 13h and 24min of daylight.
What month has the most sunshine?
The month with the most sunshine is June, with an average of 11.5h of sunshine.
What are the most humid months?
The months with the highest humidity are July and August, with an average relative humidity of 76%.
When is the highest UV index?
The months with the highest UV index are July through October, with an average maximum UV index of 7.
What time of the year is the hottest?
In Kahului, the peak average temperatures are observed in September, with a high of 79.9°F (26.6°C) and a low of 76.1°F (24.5°C).
What is the month with the warmest ocean?
With an average ocean temperature of 80.1°F (26.7°C), September is the month with the warmest seawater.
What is the month with the shortest days?
December has the shortest days of the year, with an average of 10h and 54min of daylight.
Is there Daylight Saving Time (DST)?
Kahului does not utilize Daylight Saving Time (DST). HST timezone is used throughout the entire year.
What is the month with the least sunshine?
With an average of 7h of sunshine, December has the least sunshine of the year.
Average temperature
Kahului, HI
The warmest month (with the highest average high temperature) is September (79.9°F).
The month with the lowest average high temperature is February (73.9°F).
The month with the highest average low temperature is October (76.5°F).
The coldest months (with the lowest average low temperature) are February and March (70.7°F).
Average pressure
Kahului, HI
- Average pressure in January:
30"Hg - Average pressure in February:
30.01"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
30.05"Hg - Average pressure in May:
30.04"Hg - Average pressure in June:
30.03"Hg
- Average pressure in July:
30"Hg - Average pressure in August:
29.98"Hg - Average pressure in September:
29.97"Hg - Average pressure in October:
29.97"Hg - Average pressure in November:
30"Hg - Average pressure in December:
29.99"Hg
The month with the highest atmospheric pressure is April (30.05"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).
Average wind speed
Kahului, HI
- Average wind speed in January:
10.4mph - Average wind speed in February:
11.4mph - Average wind speed in March:
12.4mph - Average wind speed in April:
12.6mph - Average wind speed in May:
11.7mph - Average wind speed in June:
13.6mph
- Average wind speed in July:
13.5mph - Average wind speed in August:
13.4mph - Average wind speed in September:
11.9mph - Average wind speed in October:
11.4mph - Average wind speed in November:
12.9mph - Average wind speed in December:
11.7mph
The windiest month (with the highest average wind speed) is June (13.6mph).
The calmest month (with the lowest average wind speed) is January (10.4mph).
Average humidity
Kahului, HI
The months with the highest relative humidity are July and August (76%).
The months with the lowest relative humidity are January and February (74%).
Average rainfall
Kahului, HI
- Average rainfall in January:
0.55" - Average rainfall in February:
0.75" - Average rainfall in March:
0.87" - Average rainfall in April:
0.63" - Average rainfall in May:
0.43" - Average rainfall in June:
0.2"
- Average rainfall in July:
0.39" - Average rainfall in August:
0.43" - Average rainfall in September:
0.39" - Average rainfall in October:
0.55" - Average rainfall in November:
0.51" - Average rainfall in December:
0.87"
The wettest months (with the highest rainfall) are March and December (0.87").
The driest month (with the least rainfall) is June (0.2").
Average rainfall days
Kahului, HI
- Average rainfall days in January:
8.8 days - Average rainfall days in February:
8.5 days - Average rainfall days in March:
11.9 days - Average rainfall days in April:
8.1 days - Average rainfall days in May:
8.3 days - Average rainfall days in June:
6.6 days
- Average rainfall days in July:
8.5 days - Average rainfall days in August:
8.7 days - Average rainfall days in September:
8.1 days - Average rainfall days in October:
9 days - Average rainfall days in November:
7.7 days - Average rainfall days in December:
9.2 days
The month with the highest number of rainy days is March (11.9 days).
The month with the least rainy days is June (6.6 days).
Average sea temperature
Kahului, HI
The best month for swimming (with the highest average sea temperature) is September (80°F).
The coldest month (with the lowest average sea temperature) is March (75.6°F).
Average daylight / Average sunshine
Kahului, HI
- Average daylight in January:
11h and 0min - Average daylight in February:
11h and 3min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 4min - Average daylight in May:
13h and 1min - Average daylight in June:
13h and 2min
- Average daylight in July:
13h and 2min - Average daylight in August:
12h and 5min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 4min - Average daylight in November:
11h and 1min - Average daylight in December:
10h and 5min
The month with the longest days is June (Average daylight: 13h and 24min).
The month with the shortest days is December (Average daylight: 10h and 54min).
- Average sunshine in January:
8h and 4min - Average sunshine in February:
8h and 5min - Average sunshine in March:
8h and 4min - Average sunshine in April:
9h and 1min - Average sunshine in May:
11h and 0min - Average sunshine in June:
11h and 3min
- Average sunshine in July:
11h and 1min - Average sunshine in August:
9h and 1min - Average sunshine in September:
9h and 4min - Average sunshine in October:
8h and 1min - Average sunshine in November:
7h and 1min - Average sunshine in December:
7h and 0min
The month with the most sunshine is June (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 7h and 0min).
Average sunshine days
Kahului, HI
- Average sunshine days in January:
19.3 days - Average sunshine days in February:
16.6 days - Average sunshine days in March:
15.2 days - Average sunshine days in April:
17.5 days - Average sunshine days in May:
18.5 days - Average sunshine days in June:
19.9 days
- Average sunshine days in July:
16 days - Average sunshine days in August:
15.8 days - Average sunshine days in September:
17.3 days - Average sunshine days in October:
17.1 days - Average sunshine days in November:
17.4 days - Average sunshine days in December:
17.7 days
The month with the most sunshine days is June (19.9 days).
The month with the least sunshine days is March (15.2 days).
Average UV index
Kahului, HI
The months with the highest UV index are July, August, September and October (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, November and December (UV index 6).
Average cloud cover
Kahului, HI
The month with the most cloud cover is March (Cloud cover 30).
The months with the least cloud cover are June and September (Cloud cover 21).
Average visibility
Kahului, HI
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).
Kahului, Hawaii, USA
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