How warm is it in Honolulu in May?

Daytime highs averaged 26.5 °C, night-time lows 23.4 °C. The highest value of the past 10 years was 28.5 °C (29 May 2019), the lowest 20.5 °C (6 May 2019).

How often does it rain in Honolulu in May?

On average there were 12.3 rain days (at least 1 mm) with 50.1 mm of precipitation in total.

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Honolulu weather in May: temperature & rain

Photo: Frank Schulenburg · CC BY-SA 4.0

🇺🇸 Weather in Honolulu in May

This is what the weather in Honolulu (Waikīkī, Oahu, Hawaii, USA) was like in May over the years 2017–2026.

Key facts at a glance

Prevailing weather: Partly cloudy

Avg. daytime high

26.5 °C

25.4 °C – 27.3 °C

Avg. night-time low

23.4 °C

22.8 °C – 24.1 °C

Avg. rain days in period

12.3

40 % of days · ≥ 1.0 mm

Avg. precipitation in period

50.1 mm

14.8 mm – 76.9 mm

Avg. cloud cover

53 %

This data source has no sunshine hours – average cloud cover is shown instead.

Avg. sea temperature

–

Sea temperature unavailable for today (daily limit).

Extremes: Highest temperature 28.5 °C (29 May 2019) · Lowest temperature 20.5 °C (6 May 2019) · Avg. daily peak wind 27 km/h

Weather mix of all days

43Sunny
118Partly cloudy
26Cloudy
100Light rain
23Rain

Summary

On average 26.5 °C during the day and 23.4 °C at night.
On average 12.3 rain days (Rain day = at least 1.0 mm of precipitation) with 50.1 mm of precipitation in total.
Prevailing weather: Partly cloudy.
Warmest year: 2025 (avg. 27.3 °C), coolest: 2018 (avg. 25.4 °C).
Wettest year: 2026 (76.9 mm), driest: 2025 (14.8 mm).
Extremes: 28.5 °C on 29 May 2019 and 20.5 °C on 6 May 2019.

Overall values from all 10 years. How is this calculated?

Temperatures per year

Average over your travel period

Precipitation & rain days

Year by year

2026
Avg. max26.3°Avg. min23.3°
Rain days
13 Rain days
Precipitation
76.9 mm
Avg. cloud cover
53 % cloudy
Sea temperature
–
Max 27.6 °C · Min 22.5 °C
2025
Avg. max27.3°Avg. min24.1°
Rain days
4 Rain days
Precipitation
14.8 mm
Avg. cloud cover
44 % cloudy
Sea temperature
–
Max 28.0 °C · Min 23.2 °C
2024
Avg. max26.5°Avg. min23.4°
Rain days
11 Rain days
Precipitation
53.1 mm
Avg. cloud cover
68 % cloudy
Sea temperature
–
Max 27.5 °C · Min 22.2 °C
2023
Avg. max26.3°Avg. min23.1°
Rain days
9 Rain days
Precipitation
30.8 mm
Avg. cloud cover
56 % cloudy
Sea temperature
–
Max 27.7 °C · Min 21.8 °C
2022
Avg. max26.3°Avg. min23.3°
Rain days
13 Rain days
Precipitation
74.5 mm
Avg. cloud cover
59 % cloudy
Sea temperature
–
Max 27.8 °C · Min 22.6 °C
2021
Avg. max26.4°Avg. min23.3°
Rain days
13 Rain days
Precipitation
37.4 mm
Avg. cloud cover
46 % cloudy
Sea temperature
–
Max 28.3 °C · Min 22.6 °C
2020
Avg. max26.4°Avg. min23.3°
Rain days
15 Rain days
Precipitation
54.8 mm
Avg. cloud cover
44 % cloudy
Sea temperature
–
Max 27.5 °C · Min 22.3 °C
2019
Avg. max26.8°Avg. min23.4°
Rain days
17 Rain days
Precipitation
66.5 mm
Avg. cloud cover
44 % cloudy
Sea temperature
–
Max 28.5 °C · Min 20.5 °C
2018
Avg. max25.4°Avg. min22.8°
Rain days
18 Rain days
Precipitation
49.6 mm
Avg. cloud cover
74 % cloudy
Sea temperature
–
Max 26.7 °C · Min 20.7 °C
2017
Avg. max26.9°Avg. min23.6°
Rain days
10 Rain days
Precipitation
42.1 mm
Avg. cloud cover
37 % cloudy
Sea temperature
–
Max 27.8 °C · Min 22.2 °C

Frequently asked questions

How warm is it in Honolulu in May?: Daytime highs averaged 26.5 °C, night-time lows 23.4 °C. The highest value of the past 10 years was 28.5 °C (29 May 2019), the lowest 20.5 °C (6 May 2019).
How often does it rain in Honolulu in May?: On average there were 12.3 rain days (at least 1 mm) with 50.1 mm of precipitation in total.

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Data sources

Weather data: Data obtained from the NASA Langley Research Center (LaRC) POWER Project funded through the NASA Earth Science/Applied Science Program
Reanalysis (weather model constrained by observations) on a coarse grid of about 50 km. Values represent a large area and can differ from local conditions, especially on islands, coasts and in mountains. Snow depth is the model value for the grid cell, not the depth on the slopes. No sunshine duration.
Reanalysis (weather model constrained by observations)
Reanalysis values represent a grid cell (approx. 25–50 km) and may differ from local measurements on coasts, islands and in mountains.
Sea temperature: MUR SST data were provided by JPL under support by NASA MEaSUREs program; accessed via NOAA CoastWatch ERDDAP
Daily multi-scale ultra-high resolution (≈ 1 km) analysis of satellite measurements (infrared, microwave) and in-situ data. Represents the foundation temperature below the daily warm surface layer. (Satellite and in-situ analysis)
Place search: Natural Earth (public domain) · GeoNames (CC BY 4.0) / OpenStreetMap (ODbL)