Climate and monthly weather forecastHaiku, HI
Climate and monthly weather forecast
Weather in January
January, like December, in Haiku, Hawaii, is a moderately hot winter month, with temperature in the range of an average low of 71.1°F (21.7°C) and an average high of 73.8°F (23.2°C). Stepping into January, Haiku records an average high-temperature of a still moderately hot 73.8°F (23.2°C), almost consistent with December. Weather in January »Weather in February
February, the last month of the winter in Haiku, is also an agreeable month, with temperature in the range of an average low of 70°F (21.1°C) and an average high of 73°F (22.8°C). The advent of February observes an average high-temperature of an agreeable 73°F (22.8°C), nearly identical to January's 73.8°F (23.2°C). Weather in February »Weather in March
March, the first month of the spring in Haiku, is still a pleasant month, with temperature in the range of an average low of 69.8°F (21°C) and an average high of 72.9°F (22.7°C). March stands out as Haiku's coldest month, with an average high-temperature of 72.9°F (22.7°C) and a low-temperature of 69.8°F (21°C). Weather in March »Weather in April
April in Haiku, Hawaii, is a moderately hot spring month, with temperature in the range of an average low of 70.9°F (21.6°C) and an average high of 74.3°F (23.5°C). Haiku marks the onset of April with an average high-temperature of a warm 74.3°F (23.5°C), a subtle shift from March's 72.9°F (22.7°C). Weather in April »Weather in May
The last month of the spring, May, is another warm month in Haiku, Hawaii, with an average temperature fluctuating between 72.7°F (22.6°C) and 75.4°F (24.1°C). Transitioning into May, Haiku experiences an average high-temperature of a still moderately hot 75.4°F (24.1°C), marking a minor shift from the preceding month. Weather in May »Weather in June
The first month of the summer, June, is also a moderately hot month in Haiku, Hawaii, with an average temperature varying between 76.8°F (24.9°C) and 74.1°F (23.4°C). As June takes hold, the average high-temperature is a still moderately hot 76.8°F (24.9°C), nearly mirroring that of the previous month. Weather in June »Weather in July
July, like June, in Haiku, Hawaii, is a moderately hot summer month, with an average temperature fluctuating between 75°F (23.9°C) and 77.5°F (25.3°C). Haiku, Hawaii, notes an average high-temperature of a still warm 77.5°F (25.3°C) in July, displaying minor variation from June. Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Haiku, Hawaii, with an average temperature ranging between min 75.7°F (24.3°C) and max 78.6°F (25.9°C). The advent of August reveals an average high-temperature of a still moderately hot 78.6°F (25.9°C), showing minimal difference from the prior month. Weather in August »Weather in September
September, the first month of the autumn in Haiku, is also a moderately hot month, with an average temperature fluctuating between 79°F (26.1°C) and 76.1°F (24.5°C). September is the warmest month, exhibiting average temperatures of 79°F (26.1°C) at the peak and 76.1°F (24.5°C) at the base. Weather in September »Weather in October
October, like September, in Haiku, Hawaii, is another warm autumn month, with temperature in the range of an average low of 75.6°F (24.2°C) and an average high of 77.9°F (25.5°C). October's onset records an average high-temperature of a still moderately hot 77.9°F (25.5°C), a near match to September's 79°F (26.1°C). Weather in October »Weather in November
November, the last month of the autumn in Haiku, is another warm month, with an average temperature fluctuating between 76.1°F (24.5°C) and 73.9°F (23.3°C). November reports an average high-temperature of a still warm 76.1°F (24.5°C), slightly varied from October's 77.9°F (25.5°C). Weather in November »Weather in December
December, the first month of the winter in Haiku, is still a warm month, with an average temperature ranging between min 72°F (22.2°C) and max 74.5°F (23.6°C). The onset of December brings with it an average high-temperature of a still warm 74.5°F (23.6°C), showing a negligible variation from the month before. Weather in December »Updated: Jul 22, 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
The months with the lowest humidity are January and February, with an average relative humidity of 76%.
In Haiku, during the entire year, the rain falls for 136.7 days and collects up to 13.94" (354mm) of precipitation.
In Haiku, snow does not fall in January through August, October through December.
Throughout the year, there are 0.1 snowfall days.
January through August, October through December, with an average maximum UV index of 6, are months with the lowest UV index.
The coldest temperatures in Haiku occur during March, when averages reach a peak of 72.9°F (22.7°C) and a low of 69.8°F (21°C).
With an average of 13h and 24min of daylight, June has the longest days of the year in Haiku.
June and July, with an average of 11.3h of sunshine, are months with the most sunshine.
July and August, with an average relative humidity of 78%, are most humid months.
September tends to be the warmest month, with temperatures averaging a daily high of 79°F (26.1°C) and a low of 76.1°F (24.5°C).
September is the month with the least rainfall. Rain falls for 8.1 days and accumulates 0.43" (11mm) of precipitation.
September is the only month when snow falls.
The month with the most snowfall days is September, when snow falls for 0.1 days.
With an average maximum UV index of 7, September is the month with the highest UV index.
October is the month with the most rainfall. Rain falls for 11.9 days and accumulates 2.17" (55mm) of precipitation.
With an average of 10h and 54min of daylight, December has the shortest days of the year.
Haiku does not observe Daylight Saving Time (DST). HST timezone is used over the entire year.
With an average of 6.7h of sunshine, December has the least sunshine of the year.
Average temperature
Haiku, HI
The warmest month (with the highest average high temperature) is September (79°F).
The month with the lowest average high temperature is March (72.9°F).
The month with the highest average low temperature is September (76.1°F).
The coldest month (with the lowest average low temperature) is March (69.8°F).
Average pressure
Haiku, 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:
29.97"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
Haiku, HI
- Average wind speed in January:
10.9mph - Average wind speed in February:
11.9mph - Average wind speed in March:
12.9mph - Average wind speed in April:
13.5mph - Average wind speed in May:
12.6mph - Average wind speed in June:
14.4mph
- Average wind speed in July:
14.2mph - Average wind speed in August:
14.1mph - Average wind speed in September:
12.6mph - Average wind speed in October:
12.1mph - Average wind speed in November:
13.5mph - Average wind speed in December:
12.4mph
The windiest month (with the highest average wind speed) is June (14.4mph).
The calmest month (with the lowest average wind speed) is January (10.9mph).
Average humidity
Haiku, HI
The months with the highest relative humidity are July and August (78%).
The months with the lowest relative humidity are January and February (76%).
Average rainfall
Haiku, HI
- Average rainfall in January:
1.06" - Average rainfall in February:
2.13" - Average rainfall in March:
1.42" - Average rainfall in April:
1.42" - Average rainfall in May:
0.94" - Average rainfall in June:
0.51"
- Average rainfall in July:
0.51" - Average rainfall in August:
0.59" - Average rainfall in September:
0.43" - Average rainfall in October:
2.17" - Average rainfall in November:
1.26" - Average rainfall in December:
1.5"
The wettest month (with the highest rainfall) is October (2.17").
The driest month (with the least rainfall) is September (0.43").
Average rainfall days
Haiku, HI
- Average rainfall days in January:
10.6 days - Average rainfall days in February:
11.4 days - Average rainfall days in March:
14.1 days - Average rainfall days in April:
11.7 days - Average rainfall days in May:
12.3 days - Average rainfall days in June:
8.8 days
- Average rainfall days in July:
10.3 days - Average rainfall days in August:
10.8 days - Average rainfall days in September:
8.1 days - Average rainfall days in October:
11.9 days - Average rainfall days in November:
12.9 days - Average rainfall days in December:
13.8 days
The month with the highest number of rainy days is March (14.1 days).
The month with the least rainy days is September (8.1 days).
Average snowfall days
Haiku, HI
- Average snowfall days in January:
0 days - Average snowfall days in February:
0 days - Average snowfall days in March:
0 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0.1 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0 days
The month with the highest number of snowfall days is September (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, October, November and December (0 days).
Average daylight / Average sunshine
Haiku, 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 36min - Average daylight in May:
13h and 6min - 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 42min - Average daylight in November:
11h and 6min - Average daylight in December:
10h and 54min
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 24min - Average sunshine in February:
8h and 42min - Average sunshine in March:
8h and 30min - Average sunshine in April:
9h and 0min - Average sunshine in May:
10h and 48min - Average sunshine in June:
11h and 18min
- Average sunshine in July:
11h and 18min - Average sunshine in August:
9h and 12min - Average sunshine in September:
9h and 30min - Average sunshine in October:
7h and 54min - Average sunshine in November:
6h and 54min - Average sunshine in December:
6h and 42min
The months with the most sunshine are June and July (Average sunshine: 11h and 18min).
The month with the least sunshine is December (Average sunshine: 6h and 42min).
Average sunshine days
Haiku, HI
- Average sunshine days in January:
16.8 days - Average sunshine days in February:
12 days - Average sunshine days in March:
11.8 days - Average sunshine days in April:
12.4 days - Average sunshine days in May:
13.4 days - Average sunshine days in June:
14.9 days
- Average sunshine days in July:
14.6 days - Average sunshine days in August:
13.2 days - Average sunshine days in September:
15.5 days - Average sunshine days in October:
12.3 days - Average sunshine days in November:
11.2 days - Average sunshine days in December:
13.3 days
The month with the most sunshine days is January (16.8 days).
The month with the least sunshine days is November (11.2 days).
Average UV index
Haiku, 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
Haiku, HI
The month with the most cloud cover is March (Cloud cover 33).
The month with the least cloud cover is September (Cloud cover 23).
Average visibility
Haiku, 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).
