Historical weather data, all-time temperature records, and monthly climate averages for Nānākuli, HI. Explore typical weather conditions by week for trip planning, and see how today compares to the historical record.
April 5th is a wet one in Nānākuli — historically, there's a 79% chance of rain on this date, the highest of any weather variable to watch. Temperatures tend to stay mild, with an average high of 76° and low of 63°, though the warmest April 5th on record only reached 79° back in 1940.
Nānākuli's all-time temperature range is remarkably narrow for a populated place — just 39° separates the record high of 91° (October 1946) and the record low of 52° (January 1947). The real drama here is rain: a single January day in 1949 dropped 7.71 inches.
Nānākuli is warm year-round, with monthly highs barely dipping below 76° even in the coolest months of January through March. Peak heat arrives mid-September, when average highs hit 84°. If you're trying to dodge rain, skip late December — the week of the 17th averages 1.72 inches of precipitation, the wettest stretch of the year.