Hilo in Spring
In spring (March, April and May), Hilo sees average daytime highs around 73°F and overnight lows near 68°F, with 21.9 in of rain over about 72 wet days across the season. It is the 3rd-warmest season and the wettest season of the year.
Across spring, daytime highs hold fairly steady around 73°F. The sky is clear or mostly clear about 23% of the time across spring, and the air most often feels humid.
Spring is Hilo's 3rd-best season to visit on our travel score. Hilo has little temperature swing across the year, so its calendar seasons blur — the season framing matters less here than for a place with four distinct seasons. For the whole year in context, see Hilo's year-round climate.
- Avg daytime high
- 73°F
- 3rd-warmest season
- Avg overnight low
- 68°F
- Rainfall
- 21.9 in
- 72 wet days
- Avg wind
- 7 mph
- Travel score
- 4.7
- 3rd-best season
- Months
- Mar · Apr · May
Temperature in Hilo in Spring
Across spring, daytime highs hold fairly steady around 73°F.
A typical spring day in Hilo reaches about 73°F and drops to 68°F overnight. The warmest of the three months is May, the coolest March.
Hilo weather by month
How the three spring months (March, April and May) compare with the rest of the year — the season's months are highlighted.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 73° / 67° | 5.8 | 16.8 | 10.9 | 6.0 |
| Feb | 72° / 67° | 6.6 | 17.2 | 11.3 | 5.5 |
| Mar | 72° / 67° | 9.1 | 23.5 | 11.9 | 4.7 |
| Apr | 73° / 68° | 7.1 | 24.8 | 12.4 | 4.5 |
| May | 74° / 69° | 5.7 | 23.7 | 12.9 | 4.9 |
| Jun | 75° / 70° | 4.7 | 24.1 | 13.2 | 4.8 |
| Jul | 76° / 71° | 5.7 | 25.8 | 13.1 | 4.6 |
| Aug | 77° / 72° | 6.7 | 25.6 | 12.7 | 4.6 |
| Sep | 77° / 72° | 4.5 | 22 | 12.1 | 5.1 |
| Oct | 77° / 71° | 5.4 | 23 | 11.5 | 5.0 |
| Nov | 75° / 70° | 7.5 | 23.2 | 11.1 | 4.8 |
| Dec | 73° / 68° | 7.9 | 22.2 | 10.8 | 5.1 |
Cloud cover in Spring
The sky is clear or mostly clear about 23% of the time across spring.
Chance of precipitation in Spring
Hilo gets around 21.9 in of rain over 72 wet days across spring. The line is the day-by-day chance of measurable precipitation.
Humidity in Spring
Most of spring feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
Wind in Spring
Winds average 7 mph across spring.
Sunrise & sunset in Spring
Daylight runs from about 11 h 36 min in early March to 13 h 06 min by late May. The lit band spans sunrise to sunset each day.
Solar energy in Spring
Average shortwave solar energy reaching the ground each day across spring, about 6.0 kWh/m².
Hazard calendar for Hilo
In spring, Hilo overlaps its pacific hurricane season. The full year is below, with each hazard's peak months called out.
Hilo sits in the eastern Pacific hurricane zone; the season peaks August–September.
Is spring a good time to visit Hilo?
Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.
spring is a reasonable time to visit Hilo for sightseeing.
What to pack for Hilo in Spring
From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In spring, Hilo sees daytime highs around 73°F and nights near 68°F. Pack rain gear and sun protection. Worth having: light clothes. About 72 days see rain.
Sea temperature near Hilo in Spring
The nearest coast averages about 76°F across spring — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea at the nearest coast (about 11 mi away) is warmest in September at about 80°F and coldest in March near 75°F.
The water stays above 68°F all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°F) | 76 | 75 | 75 | 76 | 77 | 78 | 79 | 79 | 80 | 80 | 78 | 77 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm | Warm |
| Sea temperature (°F) | Comfort | |
|---|---|---|
| Jan | 76 | Warm |
| Feb | 75 | Warm |
| Mar | 75 | Warm |
| Apr | 76 | Warm |
| May | 77 | Warm |
| Jun | 78 | Warm |
| Jul | 79 | Warm |
| Aug | 79 | Warm |
| Sep | 80 | Warm |
| Oct | 80 | Warm |
| Nov | 78 | Warm |
| Dec | 77 | Warm |
UV index in Hilo in Spring
Clear-sky midday UV across spring averages around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Hilo peaks around August 15 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 16 at about 7 (high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 8 | 10 | 12 | 14 | 11 | 13 | 13 | 14 | 13 | 10 | 8 | 7 |
| Level | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | High |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 8 | Very high |
| Feb | 10 | Very high |
| Mar | 12 | Extreme |
| Apr | 14 | Extreme |
| May | 11 | Extreme |
| Jun | 13 | Extreme |
| Jul | 13 | Extreme |
| Aug | 14 | Extreme |
| Sep | 13 | Extreme |
| Oct | 10 | Extreme |
| Nov | 8 | Very high |
| Dec | 7 | High |
Air quality in Hilo in Spring
Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.
Air quality in Hilo is worst in January — around 28 µg/m³ PM2.5 (moderate), about 1.7× the cleanest month (July, 16 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 28 | 27 | 26 | 23 | 22 | 19 | 16 | 18 | 21 | 25 | 22 | 24 |
| Level | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 28 | Moderate |
| Feb | 27 | Moderate |
| Mar | 26 | Moderate |
| Apr | 23 | Moderate |
| May | 22 | Moderate |
| Jun | 19 | Moderate |
| Jul | 16 | Moderate |
| Aug | 18 | Moderate |
| Sep | 21 | Moderate |
| Oct | 25 | Moderate |
| Nov | 22 | Moderate |
| Dec | 24 | Moderate |
Where is Hilo?
Hilo sits at 19.7°N, 155.1°W, 59 ft above sea level, in United States. The nearest listed city is Kīhei, 113 mi away.
Topography around Hilo
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Hilo.
Within 2 miles, the terrain around Hilo has only modest variations in elevation — a maximum elevation change of 774 ft around an average of 197 ft above sea level; within 10 miles, large variations in elevation — a maximum elevation change of 3,606 ft; within 50 miles, extreme variations in elevation — a maximum elevation change of 13,750 ft.
The land around Hilo is covered by trees (34%), water (29%) and grassland (22%) within 2 miles, trees (42%) and water (29%) within 10 miles, and water (49%) and grassland (20%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Hilo (19.7299°, -155.0907°, elevation 59 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.