Hālawa, United States experiences average highs of 27°C (81°F) and lows of 23°C (73°F) throughout the year. Rainfall is moderate, averaging about 8 rainy days per month. Sunshine is abundant, averaging about 11 hours per day. Average highs have stayed broadly stable across the available records.
Hālawa, United States Weather & Climate 2026
Monthly climate averages for Hālawa, United States. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Nov 
Wetter season: Feb–Dec At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
8.5/10
Best: January, February, March, April, December
UV Index
8
High
Temperature 27°C / 23°C
Feels Like 29°C / 25°C
Rainy Days 8
Rainfall 35 mm
Sunshine 11 h
Humidity 73%
Wind Speed 21 km/h
Dew Point 20°C
Hottest Month
29°C
September
Avg Low25°C
Rain5days
Coldest Month
21°C
February
Avg High25°C
Rain9days
Driest Month
5days
September
Avg High29°C
Avg Low25°C
Windiest Month
24 km/h
July (Gusts 52)
Sea Temperature
24°C – 28°C
Warmest water: September (
27.5°C
)
Worst Time to Visit
Consider avoiding August, September, October due to oppressive humidity.
Sun Position
Sunrise 05:51
Daylight 13.4h
Sunset 19:16
Live conditions—
Hālawa on the map · live conditions
Hālawa, United States
- Continent
- Americas
- Country
- United States
- City
- Hālawa
- Population
- 14K
- Elevation
- 54 m
- Coordinates
- 21.38°, -157.92°
Seasonal Breakdown
Spring
Mar–May
Avg High 26°C
Avg Low 22°C
Rain 11 days/mo
2/3 best months
Summer
Jun–Aug
Avg High 28°C
Avg Low 24°C
Rain 7 days/mo
Autumn
Sep–Nov
Avg High 28°C
Avg Low 24°C
Rain 6 days/mo
Winter
Dec–Feb
Avg High 26°C
Avg Low 22°C
Rain 8 days/mo
3/3 best months
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 26°C / 22°C . Feb: 25°C / 21°C . Mar: 26°C / 21°C . Apr: 26°C / 22°C . May: 27°C / 23°C . Jun: 28°C / 24°C . Jul: 28°C / 24°C . Aug: 29°C / 25°C . Sep: 29°C / 25°C . Oct: 28°C / 24°C . Nov: 27°C / 23°C . Dec: 26°C / 22°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 31 mm. Feb: 49 mm. Mar: 49 mm. Apr: 44 mm. May: 39 mm. Jun: 32 mm. Jul: 21 mm. Aug: 22 mm. Sep: 17 mm. Oct: 37 mm. Nov: 23 mm. Dec: 60 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 74%. Feb: 73%. Mar: 73%. Apr: 73%. May: 73%. Jun: 72%. Jul: 73%. Aug: 72%. Sep: 72%. Oct: 73%. Nov: 73%. Dec: 75%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 20 km/h . Feb: 22 km/h . Mar: 21 km/h . Apr: 22 km/h . May: 21 km/h . Jun: 22 km/h . Jul: 24 km/h . Aug: 23 km/h . Sep: 21 km/h . Oct: 20 km/h . Nov: 22 km/h . Dec: 21 km/h .
Sunshine
Sunshine
Sunshine: Jan: 10h. Feb: 10h. Mar: 11h. Apr: 11h. May: 12h. Jun: 12h. Jul: 12h. Aug: 12h. Sep: 11h. Oct: 11h. Nov: 10h. Dec: 9h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 25°C . Feb: 24°C . Mar: 25°C . Apr: 26°C . May: 26°C . Jun: 27°C . Jul: 27°C . Aug: 27°C . Sep: 28°C . Oct: 27°C . Nov: 26°C . Dec: 25°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 6. Feb: UV 7. Mar: UV 8. Apr: UV 8. May: UV 8. Jun: UV 9. Jul: UV 9. Aug: UV 9. Sep: UV 8. Oct: UV 7. Nov: UV 6. Dec: UV 6.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy Oppressive
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Aug 2025 · 29°C | Sep · 29°C |
| Coldest month | Feb 2025 · 22°C | Feb · 21°C |
| Wettest month | Dec 2025 · 82 mm | Dec · 60 mm |
| Windiest month | May 2025 · 23 km/h | Jul · 24 km/h |
Month-by-Month Weather Table
January best
Excellent 
February best
Excellent March best
Excellent April best
Excellent May
Excellent June
Good July
Good August
Good September
Good October
Good November
Excellent December best
Excellent | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January best | 26°C / 22°C | 27°C / 23°C | 7days (31 mm) Good | 9.8h Good | 74% Muggy | 5.9 High | Excellent | View Details |
| February best | 25°C / 21°C | 27°C / 22°C | 9days (49 mm) Wet | 10h Excellent | 73% Muggy | 6.8 High | Excellent | View Details |
| March best | 26°C / 21°C | 28°C / 22°C | 11days (49 mm) Wet | 10.6h Excellent | 73% Muggy | 7.8 Very High | Excellent | View Details |
| April best | 26°C / 22°C | 29°C / 23°C | 12days (44 mm) Wet | 11.3h Excellent | 73% Muggy | 8.2 Very High | Excellent | View Details |
| May | 27°C / 23°C | 30°C / 24°C | 9days (39 mm) Wet | 12h Excellent | 73% Muggy | 8.4 Very High | Excellent | View Details |
| June | 28°C / 24°C | 31°C / 25°C | 7days (32 mm) Good | 12.4h Excellent | 72% Muggy | 8.8 Very High | Good | View Details |
| July | 28°C / 24°C | 31°C / 26°C | 7days (21 mm) Good | 12.3h Excellent | 73% Muggy | 8.9 Very High | Good | View Details |
| August | 29°C / 25°C | 32°C / 27°C | 7days (22 mm) Good | 11.8h Excellent | 72% Muggy | 8.8 Very High | Good | View Details |
| September | 29°C / 25°C | 32°C / 27°C | 5days (17 mm) Good | 11.2h Excellent | 72% Muggy | 8.3 Very High | Good | View Details |
| October | 28°C / 24°C | 31°C / 27°C | 8days (37 mm) Wet | 10.6h Excellent | 73% Muggy | 7.3 Very High | Good | View Details |
| November | 27°C / 23°C | 29°C / 25°C | 6days (23 mm) Good | 10.1h Excellent | 73% Muggy | 6.1 High | Excellent | View Details |
| December best | 26°C / 22°C | 27°C / 24°C | 8days (60 mm) Wet | 9.3h Good | 75% Muggy | 5.5 High | Excellent | View Details |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Hālawa are January, February, March, April, December, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Hālawa, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Hālawa is September, with average daytime highs of 29°C (84°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Hālawa is February, with average overnight lows of 21°C (70°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Hālawa is December, averaging 60mm of precipitation across 8 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Hālawa runs through April, March, with the heaviest rainfall in April. Based on 10-year averages for Hālawa.
Hālawa receives approximately 131 sunshine hours per year. The sunniest month is June with around 12 hours. Based on climate data for Hālawa.
The least favorable months to visit Hālawa are August, September, October, primarily due to oppressive humidity. For the best conditions, consider January, February, March, April, December instead.
The annual average UV index in Hālawa is 8, classified as high. SPF 30+ sunscreen, sunglasses, and seeking shade between 10:00–16:00 are strongly recommended.
Average humidity in Hālawa is 73%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes — sea temperatures in January, February, March, April, May, June, July, August, September, October, November, December average 26°C (79°F), which is warm and comfortable for swimming and water activities.
Average wind speeds in Hālawa are 21 km/h (13 mph). The windiest month is July with peak winds reaching 24 km/h (15 mph) (gusts up to 52 km/h / 32 mph).
Hālawa averages 2 clear-sky days per month with overall cloud cover around 47%. The clearest skies occur in January.
The annual average dew point in Hālawa is 20°C (68°F), which feels muggy and uncomfortable. Expect heavy perspiration during warmer months — stay hydrated and take breaks in air-conditioned spaces.
Hālawa has a Hot Semi-Arid climate, classified as BSh under the Köppen system. Arid climates have very low rainfall relative to temperature, with large swings between daytime heat and cool nights.
The 'feels like' temperature in Hālawa ranges from 25°C (77°F) to 29°C (84°F) on average. The 'feels like' temperature closely matches the actual temperature throughout most of the year.
Yes, June is a great time to visit Hālawa. It earns a climate score of 8.1/10 with Good.
For June in Hālawa, pack Umbrella, Breathable clothing, Sunscreen (SPF 30+), Sun hat, Sunglasses. With average highs of 28°C (82°F) and 7 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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