March is one of the cooler months of the year in Hilo, with average highs near 22.5°C and lows around 18.5°C (mean 20.5°C). It is a relatively wet time of year, averaging 214 mm of rainfall and 81% relative humidity across the period.
March is one of the cooler months of the year in Hilo. Across 45 years of records, the warmest March in Hilo was 1995 — when the month averaged 21.8°C — while the coldest was 1985 at 18.9°C. Typical March days reach 22.5°C with nights near 18.5°C. The long-term March temperature trend is broadly flat.
March is a relatively wet time of year in Hilo, averaging 214 mm of rainfall. The wettest March on record was 1984 with 1120 mm, while the driest was 1993 at 3 mm.
Relative humidity in Hilo during March averages 81%. The most humid March was 2006 at 89%, and the least humid was 1995 at 73%.
March receives about 5.2 kWh/m²/day of solar energy in Hilo. The sunniest March was 2025 at 6 kWh/m²/day, and the cloudiest was 2006 at 3.9.
Average wind speed in Hilo during March is 4.2 m/s. The windiest March was 1985 at 5.5 m/s, while the calmest was 2017 at 3.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 20.4°C | 20.5°C | 20.4°C | 20.4°C | 20.7°C | +0.3°C |
| Avg High | 22.4°C | 22.8°C | 22.2°C | 22.3°C | 22.7°C | +0.3°C |
| Avg Low | 18.4°C | 18.3°C | 18.5°C | 18.6°C | 18.8°C | +0.4°C |
| Avg Rain | 298 mm | 50 mm | 329 mm | 192 mm | 208 mm | -90 mm |
March temperatures in Hilo have risen by about 0.6°C between 1981–1985 and 2021–2025.
March has ranged from a record low of 15.2°C (1990) to a record high of 27.8°C (1996).
Rainfall in March is a relatively wet time of year, averaging 214 mm, with a wettest year of 1120 mm.
A quieter season to visit Hilo
If your dates are flexible, the more temperate months of June and May tend to be the most comfortable for visiting Hilo. That said, March — with days averaging 22.5°C and nights around 18.5°C (mean 20.5°C) and higher rainfall (214 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 23.0°C | 21.1°C | 19.2°C | 24.5°C | 18.3°C | 132 mm | 82% | 4.1 m/s | 6 |
| 2024 | 21.6°C | 19.9°C | 18.2°C | 24.1°C | 17.2°C | 444 mm | 85% | 4.3 m/s | 5.6 |
| 2023 | 23.7°C | 21.5°C | 19.3°C | 26.4°C | 17.7°C | 221 mm | 83% | 3.7 m/s | 5.6 |
| 2022 | 23.6°C | 21.3°C | 19.1°C | 25.3°C | 18.1°C | 98 mm | 82% | 3.5 m/s | 5.8 |
| 2021 | 22.1°C | 20.3°C | 18.6°C | 24.8°C | 17.7°C | 99 mm | 83% | 4.3 m/s | 4.9 |
| 2020 | 22.0°C | 20.3°C | 18.6°C | 24.0°C | 17.6°C | 255 mm | 85% | 4.2 m/s | 5 |
| 2019 | 22.2°C | 20.1°C | 18.1°C | 25.2°C | 16.5°C | 61 mm | 81% | 3.9 m/s | 5.6 |
| 2018 | 22.2°C | 20.4°C | 18.7°C | 25.9°C | 16.1°C | 158 mm | 84% | 3.7 m/s | 4.4 |
| 2017 | 23.6°C | 21.4°C | 19.2°C | 24.9°C | 18.0°C | 164 mm | 82% | 3.1 m/s | 5.9 |
| 2016 | 23.4°C | 21.3°C | 19.1°C | 26.5°C | 17.6°C | 159 mm | 82% | 3.7 m/s | 5.5 |
| 2015 | 22.3°C | 20.5°C | 18.6°C | 24.0°C | 15.8°C | 195 mm | 83% | 3.7 m/s | 4.8 |
| 2014 | 22.7°C | 20.8°C | 19.0°C | 25.2°C | 18.2°C | 308 mm | 85% | 3.6 m/s | 5 |
| 2013 | 21.9°C | 19.9°C | 18.0°C | 23.9°C | 16.5°C | 112 mm | 83% | 3.5 m/s | 5 |
| 2012 | 21.2°C | 19.6°C | 17.9°C | 23.1°C | 16.0°C | 116 mm | 83% | 4.5 m/s | 5.3 |
| 2011 | 22.1°C | 20.5°C | 18.9°C | 24.8°C | 18.1°C | 309 mm | 83% | 4.5 m/s | 5.4 |
| 2010 | 21.2°C | 19.6°C | 18.1°C | 22.0°C | 17.1°C | 339 mm | 83% | 5.1 m/s | 5.4 |
| 2009 | 20.6°C | 19.1°C | 17.6°C | 24.4°C | 15.8°C | 739 mm | 85% | 4.5 m/s | 4.7 |
| 2008 | 22.1°C | 20.3°C | 18.6°C | 23.5°C | 17.7°C | 86 mm | 82% | 4.1 m/s | 5.4 |
| 2007 | 22.7°C | 20.8°C | 18.9°C | 24.9°C | 18.1°C | 94 mm | 83% | 3.9 m/s | 5.4 |
| 2006 | 21.8°C | 20.4°C | 19.1°C | 24.4°C | 17.4°C | 791 mm | 89% | 4.1 m/s | 3.9 |
| 2005 | 22.9°C | 20.8°C | 18.7°C | 25.5°C | 16.1°C | 472 mm | 82% | 3.8 m/s | 5.2 |
| 2004 | 22.5°C | 20.9°C | 19.3°C | 24.8°C | 17.0°C | 682 mm | 86% | 4.2 m/s | 4.7 |
| 2003 | 23.2°C | 20.9°C | 18.6°C | 25.1°C | 16.7°C | 72 mm | 80% | 3.4 m/s | 5.9 |
| 2002 | 21.9°C | 20.1°C | 18.2°C | 25.5°C | 16.2°C | 322 mm | 85% | 4 m/s | 5.7 |
| 2001 | 22.3°C | 20.2°C | 18.0°C | 25.3°C | 16.9°C | 13 mm | 78% | 4.4 m/s | 5.5 |
| 2000 | 22.5°C | 20.3°C | 18.1°C | 24.6°C | 17.3°C | 23 mm | 76% | 4.3 m/s | 5.6 |
| 1999 | 21.5°C | 19.7°C | 18.0°C | 23.5°C | 16.8°C | 53 mm | 79% | 5.1 m/s | 5.6 |
| 1998 | 23.5°C | 21.0°C | 18.4°C | 25.7°C | 17.0°C | 4 mm | 75% | 4.1 m/s | 5.5 |
| 1997 | 23.5°C | 21.3°C | 19.1°C | 26.6°C | 18.3°C | 17 mm | 80% | 4.7 m/s | 5 |
| 1996 | 23.7°C | 21.0°C | 18.3°C | 27.8°C | 16.9°C | 19 mm | 75% | 4 m/s | 5.1 |
| 1995 🔥 | 24.7°C | 21.8°C | 18.9°C | 27.7°C | 17.8°C | 6 mm | 73% | 3.9 m/s | 5.4 |
| 1994 | 23.0°C | 20.8°C | 18.6°C | 25.7°C | 17.3°C | 11 mm | 77% | 5.1 m/s | 5.1 |
| 1993 | 22.8°C | 20.3°C | 17.9°C | 25.2°C | 16.0°C | 3 mm | 76% | 4.5 m/s | 5.7 |
| 1992 | 22.1°C | 19.9°C | 17.8°C | 23.7°C | 16.9°C | 37 mm | 73% | 4.4 m/s | 5.3 |
| 1991 | 21.3°C | 19.7°C | 18.1°C | 24.2°C | 16.4°C | 220 mm | 83% | 5.2 m/s | 4.4 |
| 1990 | 21.8°C | 19.8°C | 17.7°C | 24.6°C | 15.2°C | 127 mm | 80% | 4.5 m/s | 4.7 |
| 1989 | 23.5°C | 21.2°C | 18.9°C | 25.8°C | 17.0°C | 43 mm | 80% | 4 m/s | 4.1 |
| 1988 | 22.3°C | 20.4°C | 18.4°C | 24.4°C | 17.3°C | 118 mm | 81% | 4.2 m/s | 5.2 |
| 1987 | 22.1°C | 19.9°C | 17.7°C | 25.3°C | 15.5°C | 52 mm | 80% | 4 m/s | 5.6 |
| 1986 | 23.5°C | 21.4°C | 19.4°C | 25.7°C | 18.2°C | 125 mm | 84% | 3.8 m/s | 5.4 |
| 1985 ❄️ | 20.3°C | 18.9°C | 17.4°C | 22.1°C | 16.1°C | 238 mm | 83% | 5.5 m/s | 5.3 |
| 1984 🌧️ | 22.8°C | 20.9°C | 18.9°C | 25.2°C | 18.0°C | 1120 mm | 82% | 3.7 m/s | 5.4 |
| 1983 | 22.5°C | 20.3°C | 18.1°C | 24.5°C | 15.7°C | 897 mm | 79% | 3.5 m/s | — |
| 1982 | 22.0°C | 20.2°C | 18.4°C | 24.6°C | 16.5°C | 47 mm | 83% | 4.5 m/s | — |
| 1981 | 22.8°C | 20.5°C | 18.2°C | 24.5°C | 16.7°C | 46 mm | 76% | 4.1 m/s | — |
Actual recorded March data for each year, 1981–2025 — sourced from NASA POWER.
The average high in March is around 22.5°C with lows near 18.5°C (mean 20.5°C), based on 45 years of NASA POWER data.
March averages 214 mm of rainfall in Hilo, a relatively wet time of year. The wettest on record was 1120 mm in 1984.
The hottest March reached 27.8°C in 1996. The coldest dipped to 15.2°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average March temperatures have risen by about 0.6°C. Daytime highs moved from 22.1°C to 22.8°C and overnight lows from 18.2°C to 18.9°C over the same span.
March is one of the cooler months of the year in Hilo and a relatively wet time of year, so plan for around 22.5°C daytime highs and 18.5°C at night.
Not quite — March is the 2nd coolest month in Hilo, averaging 20.5°C.
For March in Hilo, pack light layers you can adjust through the day, with typical highs of 22.5°C and lows of 18.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in March averages 81% — quite humid.
Average wind speed in March is 4.2 m/s. The windiest March on record averaged 5.5 m/s (1985).
The wettest March on record was 1984 with 1120 mm. On average, March sees 214 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Hilo behaves each March, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for March specifically, along with year-by-year records and how the month has changed over the decades.
