Honolulu, Hawaii Weather
First trades stir the ceiba canopy. Day 77 of spring. Read this microseason across nine climate regions →
Honolulu weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Drizzle100%0.26″81°72°—
- FridayJun 5Light Drizzle100%0.09″81°71°0°
- SaturdayJun 6Light Drizzle85%0.07″81°72°0°
- SundayJun 7Light Drizzle98%0.06″82°70°+1°
- MondayJun 8Drizzle94%0.14″80°70°-2°
- TuesdayJun 9Light Drizzle84%0.05″83°71°+3°
- WednesdayJun 10Drizzle77%0.12″82°71°-1°
PM scrubbed by 6 hours of recent rain — PM2.5 down to 9.3 µg/m³, PM10 to 15.4 µg/m³. AQI flat over the last 6 hours (within ±3 points).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 32 now. With UV 11 peaking around 1 PM under partly cloudy skies, surface ozone likely climbs to AQI 34 by mid-afternoon.
- Present
- AQI 32
- UV peak
- 11.2 at 1 PM
- Sky at peak
- partly cloudy
- Projected peak
- AQI 34
PM × Wind × Precip
PM scrubbed by 6 hours of recent rain — PM2.5 down to 9.3 µg/m³, PM10 to 15.4 µg/m³.
- PM2.5/PM10
- 0.60
- Wind
- breezy
- Recent rain
- 6h in last 6h
- Pattern
- washed out
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 8:20 AM
- Moonset
- 7:29 PM
- In sign
- ♒︎ Aquarius
First trades stir the ceiba canopy
Honolulu at a glance
- Today vs. normal: 13°F below the seasonal normal for this latitude
- Last frost: December 25 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 4, 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.