July falls within the dry season in Hawaii, which is characterized by little rain and a lot of sunshine.
Temperatures during this time of year range from a high of 29°C (84°F) on the island of Oahu to a low of 16°C (60°F) on Maui and Kauai.
In terms of rainfall, the amount of precipitation can vary significantly from island to island, with totals ranging from just 2.8 mm (0.1 in) on Molokai to 232.5 mm (9.2 in) on Kauai.
Seawater temperatures in July tend to be warm, with average temperatures ranging from 25.8°C (78.4°F) on Maui to 26.2°C (79.2°F) on Oahu and Niihau.
Continue reading to learn more about the weather on each of the main Hawaiian islands in July in the guide below.
Average temperature
July tends to be a warm and sunny month in Hawaii, with temperatures remaining fairly consistent across the islands.
The average high and low temperatures in July for each of the main Hawaiian islands can be found in the table below.
In July, the average high temperatures across the Hawaiian islands range from 24°C (75°F) to 29°C (84°F), with the lowest average low temperatures being 16°C (61°F) on Kauai and Maui Islands.
| Island | Average High | Average Low |
| Hawaii | 27°C / 81°F | 25°C / 77°F |
| Maui | 25°C / 77°F | 16°C / 60°F |
| Oahu (Honolulu) | 29°C / 84°F | 21°C / 70°F |
| Kauai | 24°C / 75°F | 16°C / 61°F |
| Molokai | 26°C / 78°F | 21°C / 69°F |
| Lanai | 26°C / 78°F | 19°C / 66°F |
| Niihau | 27°C / 81°F | 26°C / 78°F |
| Kahoolawe | 26°C / 79°F | 21°C / 70°F |
For additional context, the following graph displays the average maximum temperatures in the capital city of Hawaii, Honolulu, for the whole year.
Average seawater temperature
In the table below, you can find the average seawater temperature on each of the main Hawaiian islands in July.
In July, the seawater temperature in Hawaii is generally quite warm, ranging from 25.8°C (78.4°F) to 26.2°C.
| Island | Average Temperature |
| Hawaii | 25.9°C / 78.6°F |
| Maui | 25.8°C / 78.4°F |
| Oahu (Honolulu) | 26.2°C / 79.2°F |
| Kauai | 26.1°C / 79°F |
| Molokai | 25.9°C / 78.6°F |
| Lanai | 25.9°C / 78.6°F |
| Niihau | 26.2°C / 79.2°F |
| Kahoolawe | 26°C / 78.8°F |
For better context, the chart below shows the average seawater temperature across the whole year in the Honolulu region.
Average rainfall
July falls into the dry season in Hawaii and it is a relatively dry month on the islands.
The table below presents the data on the average rainfall and the number of rainy days in July on each of the main Hawaiian islands.
In July, the average rainfall across the Hawaiian islands ranges from 2.8 mm (0.1 in) on Molokai to 232.5 mm (9.2 in) on Kauai.
| Island | Total Rainfall | Number of Rainy Days |
| Hawaii | 50 mm / 2 in | 2 |
| Maui | 23.9 mm / 0.9 in | 3 |
| Oahu (Honolulu) | 12.6 mm / 0.5 in | 4 |
| Kauai | 232.5 mm / 9.2 in | 24 |
| Molokai | 2.8 mm / 0.1 in | 0 |
| Lanai | 26.7 mm / 1.1 in | 3 |
| Niihau | 42 mm / 1.7 in | 2 |
| Kahoolawe | 24.4 mm / 1 in | 4 |
For additional context, the below chart displays the average rainfall by month in Honolulu (Oahu island).
Hawaii weather in July – FAQ
Does it rain a lot in Hawaii in July?
July falls into the dry season in Hawaii, so it rains much less in July compared to the wet season (November-March).
Rainfall in Hawaii in July varies from island to island. On Molokai Island, the average rainfall is 2.8 mm (0.1 in) with 0 rainy days. On Kauai Island, the average rainfall is 232.5 mm (9.2 in) with 24 rainy days.
The average rainfall for the other islands in July ranges from 12.6 mm (0.5 in) to 50 mm (2 in) with 2 to 4 rainy days.
Is the water warm in Hawaii in July?
The average seawater temperature in Hawaii in July ranges from 25.8°C (78.4°F) to 26.2°C (79.2°F) across the main Hawaiian islands.
These temperatures are warm and comfortable for swimming and other aquatic sports.
See more guides about Hawaii
