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Contents
- The climate of Waipahu
- The best time to visit Waipahu
- The worst time to visit Waipahu
- Spring weather in Waipahu
- Summer weather in Waipahu
- Autumn weather in Waipahu
- Winter weather in Waipahu
- 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 Waipahu
Waipahu, located in Hawaii, USA, boasts a tropical savanna climate, also classified as 'As' according to the Köppen climate system. This classification denotes a climate characterized primarily by a 'summer' dry season. Geographically, Waipahu is located in a tropical environment, which significantly influences its weather patterns throughout the year.
On a yearly observation, it is seen that the temperatures in this city range from a mild 68°F (20°C) to a warmer 82°F (27.8°C). Indoor activities can be organized comfortably across all seasons. Humidity levels hover around 74% to 76% annually, reflecting a relatively consistent yero-round moist atmosphere. The city experiences rainfall in every month, with the least amount recorded at 0.71" (18mm) and the highest reaching up to 2.09" (53mm). This means that the rainfall frequency is generally moderate, enabling the city to flourish with lush greenery and diverse fauna.
Additionally, sea temperatures stay relatively warm throughout the year, ranging from 75.7°F (24.3°C) to 80.6°F (27°C) - a lovely range for water activities. The daylight hours range from 10.8 hours to 13.4 hours, indicating the city enjoys a longer day span during certain periods of the year. Sunshine duration fluctuates during the year, between 6.3 hours to 9.9 hours a day, offering sufficient daylight for outdoor activities.
On a yearly observation, it is seen that the temperatures in this city range from a mild 68°F (20°C) to a warmer 82°F (27.8°C). Indoor activities can be organized comfortably across all seasons. Humidity levels hover around 74% to 76% annually, reflecting a relatively consistent yero-round moist atmosphere. The city experiences rainfall in every month, with the least amount recorded at 0.71" (18mm) and the highest reaching up to 2.09" (53mm). This means that the rainfall frequency is generally moderate, enabling the city to flourish with lush greenery and diverse fauna.
Additionally, sea temperatures stay relatively warm throughout the year, ranging from 75.7°F (24.3°C) to 80.6°F (27°C) - a lovely range for water activities. The daylight hours range from 10.8 hours to 13.4 hours, indicating the city enjoys a longer day span during certain periods of the year. Sunshine duration fluctuates during the year, between 6.3 hours to 9.9 hours a day, offering sufficient daylight for outdoor activities.
The best time to visit Waipahu
The ideal time to visit Waipahu would fall between May and October when temperatures range from 78.6°F (25.9°C) to 82°F (27.8°C) offering warm weather conducive to all outdoor activities. Sea temperatures also float between 79.2°F (26.2°C) to 80.6°F (27°C) during this period lending an ideal time for ocean swimming, snorkeling, or scuba diving. Moreover, the duration of daylight is quite extensive, reaching up to 13.4 hours in June. Sunshine hours are also at peak during this period, reaching 9.9 hours in June.
The worst time to visit Waipahu
The least favorable time to visit Waipahu would be from January to April, with February recording the lowest temperatures of 68°F (20°C). Despite being a tropical city, the winter months may not offer as much warmth as some might expect. The sea temperature also drops to 75.7°F (24.3°C) in March, which might be slightly cold for some people. Additionally, the number of sunshine hours drops to 7.6 hours in February, and the daylight hours shorten to 11 hours in January.
Spring weather in Waipahu
Spring in Waipahu, from March to May, showcases a moist climate with an average relative humidity of 74-75%. The monthly temperature ranges from 70.7°F (21.5°C) to 78.6°F (25.9°C). The sea temperature gradually warms up, from 75.7°F (24.3°C) in March to 78.2°F (25.7°C) in May, beckoning for water activities. Daylight hours also tend to lengthen, reaching up to 13.2 hours in May, enabling residents and tourists alike to enjoy longer outdoor activity durations.
Summer weather in Waipahu
Summer in Waipahu spans from June to August, presenting a cosy temperate climate, the average temperature hovering between 79.7°F (26.5°C) to 82°F (27.8°C). Notably, August registers the highest temperature of 82°F (27.8°C). These months showcase optimal sea temperatures from 79.2°F (26.2°C) to 79.6°F (26.4°C), encouraging anyone to plunge into the ocean with delight. The daylight hours remain consistently long throughout the season, reaching up to 13.4 hours in June.
Autumn weather in Waipahu
Autumn graces Waipahu with pleasant weather from September to November. The temperatures slightly drop compared to the summer months, but comfortably linger from 74.7°F (23.7°C) to 81.1°F (27.3°C). In these months, rainfall is relatively moderate, making it a fantastic period for exploring the outdoors. Sea temperatures remain inviting, varying from 78.7°F (25.9°C) in November to 80.6°F (27°C) in September.
Winter weather in Waipahu
Winter begins in December, rounding off in February in Waipahu. The average temperatures exhibit a subtle dip to lower values, fluctuating between 68°F (20°C) and 76.5°F (24.7°C). However, even in the chillier months, the city maintains comfortably warm temperatures for its residents and visitors. The sea temperature gently cools to 76.1°F (24.5°C) at its lowest point in February, yet remains suitable enough for engaging in water activities.
Weather in January
January in Waipahu, Hawaii, sees the lowest temperatures of the year, with the highest reaching up to 75.7°F (24.3°C) and the lowest approximately 69.1°F (20.6°C). This month is characterized by warm days and slightly cooler nights, offering comfortable weather for residents and tourists alike. Weather in January »
Weather in February
The following month, February, is characterized by a slight decrease in the day's highest temperatures to 75.4°F (24.1°C), while the lowest temperatures hover around 68°F (20°C). Weather patterns remain consistently tropical throughout the month, with high humidity and ample sunshine. Weather in February »
Weather in March
In March, Waipahu, Hawaii experiences gradual warming, with the highest temperatures being 75.4°F (24.1°C) and the lowest temperatures at an average of 68.5°F (20.3°C). The weather continues to stay warm and humid, providing the perfect tropical climate. Weather in March »
Weather in April
As Waipahu, Hawaii moves into April, the weather transitions gradually towards summer, with the highest temperatures marking an increase to 76.8°F (24.9°C). The nights continue to grow warmer, maintaining the tropical climate the area is known for. Weather in April »
Weather in May
Weather in Waipahu, Hawaii during May witnesses a continued warming trend, with the highest recorded temperatures reaching 78.6°F (25.9°C) and the lowest averaging at 72.1°F (22.3°C). This month signals the onset of dryer weather, with a decrease in both the humidity and the amount of rainfall. Weather in May »
Weather in June
June in Waipahu, Hawaii brings with it an increase in temperatures, peaking at an average high of 79.7°F (26.5°C). This month also marks the year's peak in terms of daylight hours, offering a generous 13.4 hours of light to the city's residents and visitors. Weather in June »
Weather in July
July in Waipahu, Hawaii is the warmest month on the calendar, with the maximum temperature scaling up to a comfortable 81.1°F (27.3°C). The transition to summer is now complete, with the prevalence of warm and sunny days, and the sea temperature touching 79.2°F (26.2°C). Weather in July »
Weather in August
In August, Waipahu, Hawaii weather sustains the warm pattern, experiencing the peak of the summer season. There is a negligible increase in the maximum temperature from the previous month, hitting 82°F (27.8°C). While the days continue to be warm and sunny, there is a slight increase in rainfall, bringing with it occasional cloudy weather. Weather in August »
Weather in September
The month of September in Waipahu, Hawaii witnesses a slight decrease in temperature from the highs of summer, with the maximum temperature recorded as 82°F (27.8°C). Nonetheless, the tropical climate continues to prevail, making it an excellent time to visit the city. Weather in September »
Weather in October
October brings a further slight decrease in temperatures in Waipahu, Hawaii, with the highest reading being 81.1°F (27.3°C). This month marks a departure from summer towards more autumnal weather, which affects the amount of rainfall measured. Weather in October »
Weather in November
In November, the weather in Waipahu, Hawaii, witnesses a further drop in daylight hours, with just 11.1 hours of light marking the advent of winter. The maximum temperature drops to 79°F (26.1°C), ensuring balmy days. The shift in weather also sees a slight increase in relative humidity. Weather in November »
Weather in December
Wrapping up the year, December brings with it a further decrease in temperatures, with the highest reading being 76.5°F (24.7°C) in Waipahu, Hawaii. As the city steps into the cooler months of the year, an increase in rainfall occurs. Weather in December »
Updated: Jun 18, 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
How much does it rain?
In Waipahu, during the entire year, the rain falls for 208.4 days and collects up to 16.5" (419mm) of precipitation.
What is the month with the lowest UV index in Waipahu?
January through August, October through December, with an average maximum UV index of 6, are months with the lowest UV index.
What month is the coldest?
February and March, with an average high-temperature of 75.4°F (24.1°C), are the coldest months.
What are the most humid months?
February and December, with an average relative humidity of 76%, are most humid months.
What month is the ocean coldest in Waipahu?
With an average ocean temperature of 75.7°F (24.3°C), March is the month with the coldest seawater.
What is the least humid month?
The months with the lowest humidity are April through June and September, with an average relative humidity of 74%.
When are the longest days?
June has the longest days of the year in Waipahu, Hawaii, with an average of 13h and 24min of daylight.
What month has the most sunshine?
With an average of 9.9h of sunshine, June has the most sunshine of the year.
What is the driest month?
July is the month with the least rainfall. Rain falls for 16.4 days and accumulates 0.71" (18mm) of precipitation.
What is the hottest time of year?
In Waipahu, the months of August and September register the average highest temperatures, peaking at 82°F (27.8°C).
When is the ocean warmest?
September is the month with the warmest seawater, with an average ocean temperature of 80.6°F (27°C).
What is the month with the highest UV index?
September is the month with the highest UV index, with an average maximum UV index of 7.
What is the wettest month?
October is the month with the most rainfall. Rain falls for 18.4 days and accumulates 2.09" (53mm) of precipitation.
What are the months with the least sunshine?
November and December, with an average of 6.3h of sunshine, are months with the least sunshine.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 10h and 54min of daylight.
Is there Daylight Saving Time (DST)?
Waipahu does not observe Daylight Saving Time (DST). HST timezone is used throughout the entire year.
Average temperature
Waipahu, HI
The warmest months (with the highest average high temperature) are August and September (82°F).
The months with the lowest average high temperature are February and March (75.4°F).
The month with the highest average low temperature is September (75°F).
The coldest month (with the lowest average low temperature) is February (68°F).
Average pressure
Waipahu, HI
- Average pressure in January:
30"Hg - Average pressure in February:
30.01"Hg - Average pressure in March:
30.05"Hg - Average pressure in April:
30.06"Hg - Average pressure in May:
30.04"Hg - Average pressure in June:
30.03"Hg
- Average pressure in July:
30.01"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:
30"Hg
The month with the highest atmospheric pressure is April (30.06"Hg).
The months with the lowest atmospheric pressure are September and October (29.97"Hg).
Average wind speed
Waipahu, HI
- Average wind speed in January:
8.4mph - Average wind speed in February:
9.4mph - Average wind speed in March:
10.5mph - Average wind speed in April:
10.4mph - Average wind speed in May:
9.1mph - Average wind speed in June:
11.1mph
- Average wind speed in July:
11.3mph - Average wind speed in August:
10.6mph - Average wind speed in September:
9.3mph - Average wind speed in October:
8.5mph - Average wind speed in November:
10.2mph - Average wind speed in December:
9.1mph
The windiest month (with the highest average wind speed) is July (11.3mph).
The calmest month (with the lowest average wind speed) is January (8.4mph).
Average humidity
Waipahu, HI
The months with the highest relative humidity are February and December (76%).
The months with the lowest relative humidity are April, May, June and September (74%).
Average rainfall
Waipahu, HI
- Average rainfall in January:
1.1" - Average rainfall in February:
1.61" - Average rainfall in March:
1.93" - Average rainfall in April:
1.22" - Average rainfall in May:
1.46" - Average rainfall in June:
1.06"
- Average rainfall in July:
0.71" - Average rainfall in August:
1.02" - Average rainfall in September:
1.46" - Average rainfall in October:
2.09" - Average rainfall in November:
1.18" - Average rainfall in December:
1.65"
The wettest month (with the highest rainfall) is October (2.09").
The driest month (with the least rainfall) is July (0.71").
Average rainfall days
Waipahu, HI
- Average rainfall days in January:
13.5 days - Average rainfall days in February:
15.8 days - Average rainfall days in March:
20 days - Average rainfall days in April:
18.6 days - Average rainfall days in May:
18.4 days - Average rainfall days in June:
16.3 days
- Average rainfall days in July:
16.4 days - Average rainfall days in August:
16.8 days - Average rainfall days in September:
19.5 days - Average rainfall days in October:
18.4 days - Average rainfall days in November:
17.7 days - Average rainfall days in December:
17 days
The month with the highest number of rainy days is March (20 days).
The month with the least rainy days is January (13.5 days).
Average sea temperature
Waipahu, HI
The best month for swimming (with the highest average sea temperature) is September (80.6°F).
The coldest month (with the lowest average sea temperature) is March (75.7°F).
Average daylight / Average sunshine
Waipahu, 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 1min - Average sunshine in February:
7h and 4min - Average sunshine in March:
7h and 3min - Average sunshine in April:
7h and 5min - Average sunshine in May:
9h and 3min - Average sunshine in June:
9h and 5min
- Average sunshine in July:
9h and 2min - Average sunshine in August:
8h and 2min - Average sunshine in September:
8h and 2min - Average sunshine in October:
7h and 5min - Average sunshine in November:
6h and 2min - Average sunshine in December:
6h and 2min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The months with the least sunshine are November and December (Average sunshine: 6h and 18min).
Average sunshine days
Waipahu, HI
- Average sunshine days in January:
12.3 days - Average sunshine days in February:
8.3 days - Average sunshine days in March:
7.1 days - Average sunshine days in April:
7.7 days - Average sunshine days in May:
8.7 days - Average sunshine days in June:
9.9 days
- Average sunshine days in July:
9.8 days - Average sunshine days in August:
8.7 days - Average sunshine days in September:
6.5 days - Average sunshine days in October:
6.3 days - Average sunshine days in November:
6.2 days - Average sunshine days in December:
9.2 days
The month with the most sunshine days is January (12.3 days).
The month with the least sunshine days is November (6.2 days).
Average UV index
Waipahu, HI
The month with the highest UV index is September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 6).
Average cloud cover
Waipahu, HI
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is January (Cloud cover 36).
Average visibility
Waipahu, 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).
Waipahu, Hawaii, USA
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