The highest day temperature in July 2026 was 84°F. The lowest night temperature was 71°F. The average values for day and night temperatures during July were 80.3°F и 74.3°F respectivly.

The average sea surface temperature in July 2026 for Hilo was 83.5°F. The maximum and minimum values were 83.0°F and 84.0°F respectively.

You can expect various weather conditions during July. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in July for Hilo is 1.8 in. It makes july one of the least rainy months of the year.

The average wind speed in July is 7.8 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Hilo in July is 7.7 hours.