Climate and monthly weather forecastHaleiwa, HI
Climate and monthly weather forecast
Weather in January
January, the same as December, is a moderately hot winter month in Haleiwa, Hawaii, with an average temperature ranging between min 70°F (21.1°C) and max 75.9°F (24.4°C). With the onset of January, the average high-temperature stands at a still moderately hot 75.9°F (24.4°C), closely aligned with December's 76.6°F (24.8°C). Weather in January »Weather in February
The last month of the winter, February, is another warm month in Haleiwa, Hawaii, with an average temperature varying between 75°F (23.9°C) and 68.5°F (20.3°C). February, noted for its average high-temperature of 75°F (23.9°C) and an average low-temperature of 68.5°F (20.3°C), is considered the coldest month. Weather in February »Weather in March
The first month of the spring, March, is also a moderately hot month in Haleiwa, Hawaii, with an average temperature fluctuating between 69.3°F (20.7°C) and 75.2°F (24°C). Haleiwa measures an average high-temperature of a still moderately hot 75.2°F (24°C) in March, nearly consistent with the preceding month. Weather in March »Weather in April
April, the same as March, is another warm spring month in Haleiwa, Hawaii, with an average temperature ranging between max 76.8°F (24.9°C) and min 71.2°F (21.8°C). Stepping into April, Haleiwa records an average high-temperature of a still warm 76.8°F (24.9°C), almost consistent with March. Weather in April »Weather in May
May, the last month of the spring in Haleiwa, is also a moderately hot month, with an average temperature varying between 72.9°F (22.7°C) and 78.6°F (25.9°C). The transition into May is marked with an average high-temperature of a still moderately hot 78.6°F (25.9°C), showing an insignificant shift from April's 76.8°F (24.9°C). Weather in May »Weather in June
The first month of the summer, June, is also a moderately hot month in Haleiwa, Hawaii, with an average temperature varying between 79.9°F (26.6°C) and 74.1°F (23.4°C). The advent of June denotes an average high-temperature of a still moderately hot 79.9°F (26.6°C), subtly different from May's 78.6°F (25.9°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in Haleiwa, Hawaii, with an average temperature varying between 75.2°F (24°C) and 80.8°F (27.1°C). Haleiwa's transition from June to July introduces an average high-temperature of a still moderately hot 80.8°F (27.1°C), marking an insignificant variation from the 79.9°F (26.6°C). Weather in July »Weather in August
August, the last month of the summer in Haleiwa, is also a moderately hot month, with an average temperature fluctuating between 81.5°F (27.5°C) and 75.7°F (24.3°C). The arrival of August marks a slight shift to an average high-temperature of a still moderately hot 81.5°F (27.5°C) from July's 80.8°F (27.1°C). Weather in August »Weather in September
September, the first month of the autumn in Haleiwa, is also a moderately hot month, with temperature in the range of an average low of 75.7°F (24.3°C) and an average high of 81.7°F (27.6°C). September is the month when Haleiwa experiences its warmest temperatures, averaging a high of 81.7°F (27.6°C) and a low of 75.7°F (24.3°C). September's heat index is evaluated at a hot 86°F (30°C). Weather in September »Weather in October
October, the same as September, is a moderately hot autumn month in Haleiwa, Hawaii, with temperature in the range of an average low of 75.4°F (24.1°C) and an average high of 81.1°F (27.3°C). As Haleiwa transitions into October, the average high-temperature stands at a still moderately hot 81.1°F (27.3°C), offering little variation from the preceding month. Weather in October »Weather in November
The last month of the autumn, November, is also a moderately hot month in Haleiwa, Hawaii, with temperature in the range of an average high of 78.8°F (26°C) and an average low of 73.6°F (23.1°C). October's transformation into November witnesses an average high-temperature of a still warm 78.8°F (26°C), noting a minor change from the preceding month. Weather in November »Weather in December
The first month of the winter, December, is still a warm month in Haleiwa, Hawaii, with an average temperature varying between 71.2°F (21.8°C) and 76.6°F (24.8°C). December commences with an average high-temperature of a still warm 76.6°F (24.8°C), showing little deviation from November's 78.8°F (26°C). Weather in December »Updated: Feb 10, 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
Throughout the year, there are 190.2 rainfall days, and 11.65" (296mm) of precipitation is accumulated.
The months with the lowest UV index in Haleiwa, Hawaii, are January through June, August, October through December, with an average maximum UV index of 6.
February brings the lowest temperatures, with an average high of 75°F (23.9°C) and an average low of 68.5°F (20.3°C).
The months with the highest humidity in Haleiwa are February and December, with an average relative humidity of 76%.
The wettest months are February and October, with an average 1.34" (34mm) of rainfall.
With an average ocean temperature of 75.2°F (24°C), March is the month with the coldest seawater in Haleiwa.
The months with the lowest humidity in Haleiwa are May and September, with an average relative humidity of 74%.
The month with the longest days is June, with an average of 13h and 24min of daylight.
With an average of 9.9h of sunshine, June has the most sunshine of the year in Haleiwa.
The month with the least rainfall in Haleiwa, Hawaii, is July, when the rain falls for 16.6 days and typically collects 0.63" (16mm) of precipitation.
July and September, with an average maximum UV index of 7, are months with the highest UV index.
Haleiwa's warmest temperatures are experienced in September, with average high temperatures of 81.7°F (27.6°C) and lows of 75.7°F (24.3°C).
With an average ocean temperature of 80.2°F (26.8°C), September is the month with the warmest seawater.
With an average of 6.2h of sunshine, November has the least sunshine of the year.
With an average of 10h and 48min of daylight, December has the shortest days of the year in Haleiwa, Hawaii.
Haleiwa, Hawaii, does not observe Daylight Saving Time (DST). HST timezone is used over the entire year.
Average temperature
Haleiwa, HI
The warmest month (with the highest average high temperature) is September (81.7°F).
The month with the lowest average high temperature is February (75°F).
The months with the highest average low temperature are August and September (75.7°F).
The coldest month (with the lowest average low temperature) is February (68.5°F).
Average pressure
Haleiwa, 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:
29.99"Hg - Average pressure in September:
29.98"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 month with the lowest atmospheric pressure is October (29.97"Hg).
Average wind speed
Haleiwa, HI
- Average wind speed in January:
9mph - Average wind speed in February:
10.1mph - Average wind speed in March:
11.2mph - Average wind speed in April:
10.9mph - Average wind speed in May:
9.7mph - Average wind speed in June:
11.5mph
- Average wind speed in July:
11.6mph - Average wind speed in August:
10.9mph - Average wind speed in September:
9.8mph - Average wind speed in October:
9.1mph - Average wind speed in November:
10.9mph - Average wind speed in December:
9.7mph
The windiest month (with the highest average wind speed) is July (11.6mph).
The calmest month (with the lowest average wind speed) is January (9mph).
Average humidity
Haleiwa, HI
The months with the highest relative humidity are February and December (76%).
The months with the lowest relative humidity are May and September (74%).
Average rainfall
Haleiwa, HI
- Average rainfall in January:
0.79" - Average rainfall in February:
1.34" - Average rainfall in March:
1.22" - Average rainfall in April:
0.87" - Average rainfall in May:
1.02" - Average rainfall in June:
0.79"
- Average rainfall in July:
0.63" - Average rainfall in August:
0.79" - Average rainfall in September:
0.98" - Average rainfall in October:
1.34" - Average rainfall in November:
0.83" - Average rainfall in December:
1.06"
The wettest months (with the highest rainfall) are February and October (1.34").
The driest month (with the least rainfall) is July (0.63").
Average rainfall days
Haleiwa, HI
- Average rainfall days in January:
12.5 days - Average rainfall days in February:
14.3 days - Average rainfall days in March:
17.7 days - Average rainfall days in April:
16.8 days - Average rainfall days in May:
17.2 days - Average rainfall days in June:
15.9 days
- Average rainfall days in July:
16.6 days - Average rainfall days in August:
16.3 days - Average rainfall days in September:
17.4 days - Average rainfall days in October:
16.4 days - Average rainfall days in November:
14.6 days - Average rainfall days in December:
14.5 days
The month with the highest number of rainy days is March (17.7 days).
The month with the least rainy days is January (12.5 days).
Average sea temperature
Haleiwa, HI
The best month for swimming (with the highest average sea temperature) is September (80.2°F).
The coldest month (with the lowest average sea temperature) is March (75.2°F).
Average daylight / Average sunshine
Haleiwa, HI
- Average daylight in January:
11h and 0min - Average daylight in February:
11h and 30min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 42min - Average daylight in May:
13h and 12min - Average daylight in June:
13h and 24min
- Average daylight in July:
13h and 18min - Average daylight in August:
12h and 48min - Average daylight in September:
12h and 18min - Average daylight in October:
11h and 36min - Average daylight in November:
11h and 6min - Average daylight in December:
10h and 48min
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 48min).
- Average sunshine in January:
8h and 12min - Average sunshine in February:
7h and 48min - Average sunshine in March:
7h and 36min - Average sunshine in April:
7h and 48min - Average sunshine in May:
9h and 42min - Average sunshine in June:
9h and 54min
- Average sunshine in July:
9h and 12min - Average sunshine in August:
8h and 12min - Average sunshine in September:
8h and 36min - Average sunshine in October:
7h and 48min - Average sunshine in November:
6h and 12min - Average sunshine in December:
6h and 18min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is November (Average sunshine: 6h and 12min).
Average sunshine days
Haleiwa, HI
- Average sunshine days in January:
12.9 days - Average sunshine days in February:
10.3 days - Average sunshine days in March:
7.9 days - Average sunshine days in April:
6.8 days - Average sunshine days in May:
8.5 days - Average sunshine days in June:
8.5 days
- Average sunshine days in July:
6.8 days - Average sunshine days in August:
7.2 days - Average sunshine days in September:
6.5 days - Average sunshine days in October:
8.3 days - Average sunshine days in November:
9.7 days - Average sunshine days in December:
10.4 days
The month with the most sunshine days is January (12.9 days).
The month with the least sunshine days is September (6.5 days).
Average UV index
Haleiwa, HI
The months with the highest UV index are July and September (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, August, October, November and December (UV index 6).
Average cloud cover
Haleiwa, HI
The month with the most cloud cover is March (Cloud cover 44).
The months with the least cloud cover are January and September (Cloud cover 37).
Average visibility
Haleiwa, 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).
