Hilo (HI)
May
Weather in Hilo, Hawaii for May 2026
Your guide to Hilo weather in May - trends and predictions
In general, the average temperature in Hilo at the beginning of May is 23.9 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 21.9 °F by the end of May.
Hilo experiences heavy rainfall in May, with over 20 rainy days and an average total precipitation 94.1 mm.
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Temperatures
Rain 🌧️
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2
Dry days
29
Rainy days
0
Snow days
23°/19°
Temperatures
16 km/h
Avg max wind
75 %
Avg humidity
Hilo Weather May
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Temperatures trend during May in Hilo
See the weather trend as well as the moving average line
May weather in Hilo day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Patchy rain possible | 24° /18° | 7.2 mm | 5 | |
| May 2 | Patchy rain possible | 24° /18° | 0.4 mm | 5 | |
| May 3 | Patchy rain possible | 24° /18° | 0.2 mm | 5 | |
| May 4 | Patchy rain possible | 24° /19° | 0.5 mm | 5 | |
| May 5 |  Overcast | 24° /19° | 2 mm | 5 | |
| May 6 | Patchy rain possible | 24° /17° | 3.5 mm | 5 | |
| May 7 | Patchy rain possible | 23° /18° | 4.1 mm | 5 | |
| May 8 |  Moderate rain at times | 23° /18° | 4.1 mm | 5 | |
| May 9 | Moderate rain at times | 24° /19° | 2.9 mm | 5 | |
| May 10 | Moderate rain at times | 24° /19° | 4.1 mm | 5 | |
| May 11 | Patchy rain possible | 24° /19° | 3.5 mm | 5 | |
| May 12 | Moderate rain at times | 23° /19° | 4.2 mm | 5 | |
| May 13 | Patchy rain possible | 22° /19° | 3.3 mm | 5 | |
| May 14 | Patchy rain possible | 23° /19° | 2.3 mm | 5 | |
| May 15 | Patchy rain possible | 23° /18° | 2.3 mm | 5 | |
| May 16 | Moderate rain at times | 22° /17° | 3.8 mm | 5 | |
| May 17 | Moderate or heavy rain shower | 24° /18° | 4.1 mm | 5 | |
| May 18 | Moderate rain at times | 23° /20° | 7.3 mm | 5 | |
| May 19 | Moderate rain at times | 23° /19° | 4.5 mm | 5 | |
| May 20 | Patchy rain possible | 23° /20° | 3 mm | 5 | |
| May 21 | Patchy rain possible | 23° /19° | 1.5 mm | 5 | |
| May 22 | Moderate rain at times | 22° /17° | 3.9 mm | 5 | |
| May 23 | Moderate rain at times | 22° /18° | 3.6 mm | 5 | |
| May 24 | Moderate rain at times | 21° /17° | 8 mm | 5 | |
| May 25 | Light rain shower | 19° /15° | 2.3 mm | 4 | |
| May 26 | Light rain shower | 22° /16° | 3 mm | 5 | |
| May 27 | Patchy rain possible | 23° /20° | 0.3 mm | 5 | |
| May 28 | Patchy rain possible | 23° /20° | 0.2 mm | 5 | |
| May 29 | Patchy rain possible | 22° /21° | 0.5 mm | 5 | |
| May 30 | Patchy rain possible | 22° /20° | 0.4 mm | 5 | |
| May 31 | Patchy rain possible | 22° /20° | 3.1 mm | 5 | |
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Important Notice
Our weather forecast for Hilo in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Hilo forecast closer to your planned date for the most up-to-date weather information.
Change Month
Hilo in May - FAQ
What are the expected maximum and minimum temperatures in Hilo during May?
During May, expect a variety of temperatures with highs around 23° and lows near 19°, suitable for diverse activities and preferences.
How much rainfall should be expected in Hilo during May?
Moderate rainfall is anticipated in Hilo during May, with a total of 94.1 mm spread over approximately 29 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Hilo during May?
The average wind speed in Hilo during May is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Hilo
Explore the daily rainfall trends and prepare for Hilos May weather 💧
UV exposure in Hilo during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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