Haiku (HI) Temperature by Month

Haiku in Maui, Hawaii enjoys a stable climate, with daytime temperatures staying close to 26°C (79°F) throughout the year. Explore the full monthly breakdown below.

Year-round, Haiku experiences a consistently comfortable climate. Maximum daytime temperatures range from a comfortable 28°C (82°F) in September to a comfortable 25°C (77°F) in the coolest month, February. Nighttime temperatures range from 23°C (73°F) in September to 20°C (68°F) in February.

The chart below illustrates the average maximum day and minimum night temperatures in Haiku by month:

From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. September, the warmest month, averages 271 hours of sunshine.

The chart below shows the average temperature throughout the year:

Haiku's average annual maximum temperature is 26°C (79°F). To put that in context, here's how it compares to a few well-known destinations:

Rome, Italy averages 20°C (68°F) annually, with reliably warm summers and comfortable winters.

Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.

Shanghai, China averages 21°C (70°F) a year, with warm summers, mild winters, and a noticeable spring and autumn.

Brisbane, Australia averages 26°C (79°F) a year, with warm winters and hot, humid summers.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In Haiku, February is the coolest month, with average highs of 25°C (77°F) and humidity around 75%, considered high. In September, the warmest month, temperatures average 28°C (82°F) with 70% humidity, conditions that feel high. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Haiku this rarely lasts long on the ground.

For more on Haiku's weather, including monthly rainfall, sunshine hours, and humidity, visit our Haiku climate page.