United StatesAverage weather for Hilo in May
It's warm in May in Hilo with an average temperature of 28°C. Temperatures this month range from a low of 27°C to a high of 29°C. At night, you can expect temperatures between 19°C and 21°C.
Start of May
The month of May starts in Hilo with hot temps, averaging around 28°C during the day and nights around 21°C. There are plenty of days with a good chance of precipitation.
With the temperature difference between day and night, it’s smart to wear layers.
Mid May
By mid-May, daytime temps rise to around 29°C, with nights around 21°C. There’s a high chance of precipitation during this time.
Since it cools down at night, it’s a good idea to wear layers.
End of May
By the end of May, the average daytime temperature in Hilo is around 29°C, while nighttime temps are about 21°C. There’s a significant chance of many days with precipitation.
Because temperatures drop in the evening, wearing layers is recommended.
Water temperature
The water temperature at Hilo is 26°C this month. Lovely temperature for a swim.
In May, there is an average of 272 mm of precipitation, spread over 21 days. The wind speed is around 4 Bft, mostly coming from the South.
Hilo in May |
New York | ||
|---|---|---|---|
 Average temperature |
28°C | 22°C | |
 Max. temperature |
29°C | 28°C | |
| Min. temperature |
27°C | -5°C | |
 Total precipitation |
272 mm | 105 mm | |
| Rainy days |
21 days | 14 days | |
April
UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is May a good time to visit Hilo?
Looking for sun? May isn’t a good month to be in Hilo. The temperature is nice, but there’s too much chance of rain.
Temperature records
With 34°C in 2021, Hilo reached the highest temperature in May over the past 10 years. The lowest daytime temperature in this month was 22°C in 2015. The extreme nighttime temperatures ranged from a lowest recorded value of 9°C to a highest value of 24°C.
Check out the climate of Hilo for all months and discover the best travel time
Daily Temperature in May in Hilo
This chart shows the average daily high and low temperatures in May for Hilo, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in May in Hilo
The chart below shows the average daily precipitation in May for Hilo, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for May, you can expect about 21 days of precipitation in Hilo.
Daily UV index in May in Hilo
This chart shows the average daily UV index in May in Hilo, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in May in Hilo over the years
This chart shows the average temperature in May in Hilo, measured in degrees Celsius, over the past few years.
Total precipitation in May in Hilo over the years
This chart shows the average precipitation in May in Hilo, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
Daily weather in May for Hilo
Click on any day in May to get detailed info about the usual weather on that day in Hilo. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in May in Hilo
Have you been to Hilo in May?
Share your weather experience in May in Hilo.
Average weather in Hilo by month
Click on a month below to see detailed weather info for Hilo. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
