Hālawa, United States — Weather in May 2027

Monthly climate averages for Hālawa, United States. Based on 10-year ERA5 reanalysis data.

BSh Hot Semi-Arid
8.7 /10
Excellent

May is an excellent month in Hālawa

Climate Overview

Hālawa, United States in May has warm conditions, with highs averaging 27°C (81°F). Sea temperature reaches 26.2°C (79°F).

This month falls at the end of Spring.

Temperatures remain fairly steady throughout May, with daily highs around 27°C (81°F).

Rainfall is heaviest during the middle of the month, while the last third tends to be drier.

Expect around 11.6h of sunshine at the start of May, increasing to 12.4h by the end.

Wind speeds ease off through the month, from 23 km/h (14 mph) to 19 km/h (12 mph).

The warmest days tend to fall around the 30th, averaging 27.6°C (82°F).

Compared to April, this month is about 1°C warmer with 3 fewer rainy days.

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Monthly May Averages

Temperature
27°C / 23°C
Feels Like
30°C / 24°C
Rain
9 days · 39 mm
Sunshine
12h / day
Humidity
73% — Humid
Wind
21 km/h
Wind Direction
ENE (73°)
Gusts
47 km/h
Daylight
13.2 h
Cloud Cover
49%
Clear Sky Days
1.2
UV Index
8.4 — Very High
Sea Temperature
26°C
Dew Point
20°C — Humid
Moon Phase
Waxing Gibbous · 66%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

32°C 29°C 26°C 23°C 20°C 17°C 151015202531
HighLow

Daily Precipitation

0 mm 2 mm 4 mm 6 mm 151015202531
Rainfall

Daily Sunshine

0h 4h 8h 12h 16h 151015202531
Sunshine

Daily Wind Speed

0 6 12 18 24 30 151015202531
Wind Speed
Sun Position
Sunrise 05:55
Daylight 13.2h
Sunset 19:04

What to Expect

Daytime temperatures around 27°C (81°F) are ideal for full-day outdoor exploration.

Rain usually comes in shorter passing showers rather than all-day rain.

Recent yearly records for May have stayed close to the long-run average.

Compare Months

January best
Excellent
Temp
26°C / 22°C
Feels Like
27°C / 23°C
Rain
7days (31 mm) Good
Sun
9.8h Good
Humidity
74% Muggy
UV
5.9 High
View Details
February best
Excellent
Temp
25°C / 21°C
Feels Like
27°C / 22°C
Rain
9days (49 mm) Wet
Sun
10h Excellent
Humidity
73% Muggy
UV
6.8 High
View Details
March best
Excellent
Temp
26°C / 21°C
Feels Like
28°C / 22°C
Rain
11days (49 mm) Wet
Sun
10.6h Excellent
Humidity
73% Muggy
UV
7.8 Very High
View Details
April best
Excellent
Temp
26°C / 22°C
Feels Like
29°C / 23°C
Rain
12days (44 mm) Wet
Sun
11.3h Excellent
Humidity
73% Muggy
UV
8.2 Very High
View Details
May
Excellent
Temp
27°C / 23°C
Feels Like
30°C / 24°C
Rain
9days (39 mm) Wet
Sun
12h Excellent
Humidity
73% Muggy
UV
8.4 Very High
View Details
June
Good
Temp
28°C / 24°C
Feels Like
31°C / 25°C
Rain
7days (32 mm) Good
Sun
12.4h Excellent
Humidity
72% Muggy
UV
8.8 Very High
View Details
July
Good
Temp
28°C / 24°C
Feels Like
31°C / 26°C
Rain
7days (21 mm) Good
Sun
12.3h Excellent
Humidity
73% Muggy
UV
8.9 Very High
View Details
August
Good
Temp
29°C / 25°C
Feels Like
32°C / 27°C
Rain
7days (22 mm) Good
Sun
11.8h Excellent
Humidity
72% Muggy
UV
8.8 Very High
View Details
September
Good
Temp
29°C / 25°C
Feels Like
32°C / 27°C
Rain
5days (17 mm) Good
Sun
11.2h Excellent
Humidity
72% Muggy
UV
8.3 Very High
View Details
October
Good
Temp
28°C / 24°C
Feels Like
31°C / 27°C
Rain
8days (37 mm) Wet
Sun
10.6h Excellent
Humidity
73% Muggy
UV
7.3 Very High
View Details
November
Excellent
Temp
27°C / 23°C
Feels Like
29°C / 25°C
Rain
6days (23 mm) Good
Sun
10.1h Excellent
Humidity
73% Muggy
UV
6.1 High
View Details
December best
Excellent
Temp
26°C / 22°C
Feels Like
27°C / 24°C
Rain
8days (60 mm) Wet
Sun
9.3h Good
Humidity
75% Muggy
UV
5.5 High
View Details
Month Temp Feels Like Rain Sun Humidity UV Status
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

What to Wear

Summer clothing like shorts, t-shirts, and sundresses will be comfortable. Bring a light cardigan for air-conditioned spaces.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

UmbrellaBreathable clothingSunscreen (SPF 30+)Sun hatSunglassesComfortable walking shoes

Frequently Asked Questions

May is typically excellent for visiting Hālawa, with average highs of 27°C (81°F) and around 9 rainy days. Hālawa, United States in May has warm conditions, with highs averaging 27°C (81°F). Sea temperature reaches 26°C (79°F
Hālawa typically sees around 9 rainy days in May with 39 mm (1.5 in) of total rainfall. An umbrella should suffice.
Nights stay pleasantly warm in Hālawa during May, around 23°C (73°F). Light evening wear is sufficient.
With highs of 27°C (81°F) and lows of 23°C (73°F) in May, we recommend: Umbrella, Breathable clothing, Sunscreen (SPF 30+), Sun hat, Sunglasses. Comfortable walking shoes are essential.
May is not the most favourable month weather-wise in Hālawa. Consider visiting during months with milder temperatures or less rainfall for a better experience.
The average UV index in Hālawa during May is 8 (very high). Strong sun protection is essential — SPF 50+, protective clothing, and avoid prolonged outdoor exposure during peak hours.
Hālawa gets approximately 13 hours of daylight per day in May, with around 12 hours of sunshine.
Snow is uncommon in Hālawa during May based on 10-year climate averages.

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