Weather in Honolulu, Hawaii
Flowers spill across the islands. Day 59 of spring. Read this microseason across nine climate regions →
- TodayMay 16Drizzle100%81°71°
- SundayMay 17Light Showers91%83°71°
- MondayMay 18Light Drizzle80%80°72°
- TuesdayMay 19Light Drizzle76%82°72°
- WednesdayMay 20Light Drizzle98%81°71°
- ThursdayMay 21Light Drizzle96%80°72°
- FridayMay 22Light Drizzle84%78°70°
- PM 2.5
- 4.1 μg/m³
- PM 10
- 6.7 μg/m³
- NO₂
- 1.9 μg/m³
- Ozone
- 54.0 μg/m³
- UV Index
- 0.0 Low
When the dew is on the grass, rain will never come to pass.
- Moonrise
- 4:27 PM
- Moonset
- 5:30 AM
- In sign
- ♊︎ Gemini
Flowers spill across the islands
Honolulu at a glance
- Today vs. normal: 18°F below the seasonal normal for this latitude
- Last frost: December 25 (climatological average for this latitude)
- Microseason: 28 of 72, May 16–20
- Planting window: Direct sow okra, melons, and southern peas. Thin carrot rows.
Right now in the garden
Peak growing season
As of May 17, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | lettuce, peas, spinach, radishes | — |
| March | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | — |
| April | tomatoes, peppers, beans, squash | — |
| May | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | — | lettuce, peas, radishes |
| July | — | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | — | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | fall brassicas, garlic (overwinter), carrots | — |
| December | — | — |
A year in weather
September brings Honolulu's warmest temperatures (~75°F mean) while February delivers the coolest (~70°F). Rain follows a different schedule — July sees the heaviest downpours (15.3 inches) and February stays driest (9.1 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 70° | 10.6″ | 12 |
| February | 70° | 9.1″ | 12 |
| March | 70° | 13.7″ | 15 |
| April | 71° | 12.9″ | 18 |
| May | 72° | 9.3″ | 16 |
| June | 73° | 12.9″ | 21 |
| July | 74° | 15.3″ | 23 |
| August | 75° | 12.7″ | 20 |
| September | 75° | 12.2″ | 19 |
| October | 75° | 12.9″ | 19 |
| November | 73° | 15.1″ | 18 |
| December | 71° | 14.2″ | 18 |
Regional context
Honolulu belongs to a varied climate region that includes nearby cities with similar temperature ranges, seasonal patterns, and growing conditions.
Similar climates: Kailua, HI, East Honolulu, HI, Hilo, HI, Pearl City, HI, Waipahu, HI.
Naturalist notes
Golden plovers complete their remarkable journey from Alaska in late April, appearing along Honolulu's shorelines and parks.
Plumeria trees reach peak bloom during May, filling the warm air with their distinctive fragrance.
Frequently asked
- When does it freeze in Honolulu?
- Honolulu's last spring frost typically occurs around mid-February, with the first fall frost returning around mid-December.
- What is the rainy season in Honolulu?
- July brings the heaviest rainfall with about 15.3 inches on average; the city receives roughly 151 inches annually.
- What is the warmest month in Honolulu?
- September typically records the warmest temperatures, averaging about 75°F.
- What is the coldest month in Honolulu?
- February typically brings the coolest weather, averaging about 70°F.
- When can I start a vegetable garden in Honolulu?
- Cool-season crops like peas and lettuce can be planted around the last spring frost in mid-February; warm-season crops such as tomatoes and peppers should wait until 1–2 weeks after.
- How many rainy days does Honolulu get?
- Honolulu experiences about 210 rainy days per year on average.
- What hardiness zone is Honolulu?
- Check the USDA's online lookup with Honolulu's ZIP code for the current hardiness zone designation, which reflects the city's lowest average winter temperatures.
Climate
Honolulu, Hawaii sits in a varied climate zone. Temperatures stay remarkably steady — January hovers near 70°F while July averages 74°F, creating just a 5°F seasonal swing.
Throughout the year, Honolulu receives about 151 inches of precipitation spread over roughly 210 rainy days.
Climate patterns here follow the city's latitude (21.3°N), proximity to large water bodies, and elevation. These factors determine what grows here, when frost might occur, and daily weather patterns.