Climate Comfort Score
67/100
Good
NOAA 1991–2020 normals 74°F annual avg 2 stations
Hilo, HI Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 74°F
- Avg annual temp
- 67/100
- Comfort score
- 120.4"
- Annual precip
30-year climate normals from 2 weather stations (1991-2020).
The climate verdict for Hilo
Hilo, Hawaii averages 74°F a year and scores 67/100 on the comfort index - good, milder than 57% of U.S. cities.
- 74°F
- annual average temperature (NOAA normal)
- 67/100
- comfort score, milder than 57% of U.S. cities
- 120.4"
- precipitation, annual total
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
74°F (23°C)
Avg High
81°F
Avg Low
67°F
Annual Precip
120.4"
Comfort Score
67/100
Good
Avg Annual Temperature
74°F
30-year mean (NOAA NCEI)
Annual Precipitation
120.4"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Hilo) 67.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Hilo area.
How Hilo compares to every U.S. city
Hilo's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
67 Top 43% higher than 57% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Hilo
MethodologyHilo's NOAA 1991-2020 normal sits inside a longer story: U.S. land temperatures have been tracking (and drifting from) the global mean since 1900, and the chart below shows that spread, with the most recent decade running warmer than the 30-year mean.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 79°F (26°C) | 64°F (18°C) | 71°F (22°C) | 7.9" | 0.0 | 0.1 |
| February | 78°F (26°C) | 64°F (18°C) | 71°F (22°C) | 10.2" | 0.0 | 0.0 |
| March | 79°F (26°C) | 65°F (18°C) | 72°F (22°C) | 12.7" | 0.0 | 0.1 |
| April | 79°F (26°C) | 66°F (19°C) | 73°F (23°C) | 9.4" | 0.0 | 0.0 |
| May | 81°F (27°C) | 67°F (20°C) | 74°F (23°C) | 7.0" | 0.0 | 0.0 |
| June | 82°F (28°C) | 69°F (20°C) | 75°F (24°C) | 7.3" | 0.0 | 0.0 |
| July | 83°F (28°C) | 70°F (21°C) | 76°F (25°C) | 9.2" | 0.0 | 0.2 |
| August | 83°F (28°C) | 70°F (21°C) | 77°F (25°C) | 11.3" | 0.0 | 0.1 |
| September | 83°F (29°C) | 70°F (21°C) | 77°F (25°C) | 8.7" | 0.0 | 0.7 |
| October | 82°F (28°C) | 69°F (21°C) | 76°F (24°C) | 10.2" | 0.0 | 0.3 |
| November | 80°F (27°C) | 68°F (20°C) | 74°F (23°C) | 14.4" | 0.0 | 0.1 |
| December | 79°F (26°C) | 66°F (19°C) | 72°F (22°C) | 12.1" | 0.0 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 7.9"
15.7 days with precipitation
February 10.2"
16.6 days with precipitation
March 12.7"
21.8 days with precipitation
April 9.4"
24.5 days with precipitation
May 7.0"
22.9 days with precipitation
June 7.3"
25.4 days with precipitation
July 9.2"
26.6 days with precipitation
August 11.3"
27.2 days with precipitation
September 8.7"
23.3 days with precipitation
October 10.2"
23.4 days with precipitation
November 14.4"
23.3 days with precipitation
December 12.1"
22.3 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
N/A
50% probability date
Last Spring Freeze
N/A
50% probability date
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
0
Higher = more heating needed
Cooling Degree Days
3,283
Higher = more cooling needed
Warmest Month
August
Coldest Month
February
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 74% | 6.9 | 19% | 30% |
| February | 75% | 7.1 | 12% | 39% |
| March | 78% | 6.8 | 8% | 42% |
| April | 77% | 6.7 | 7% | 42% |
| May | 76% | 6.4 | 8% | 30% |
| June | 77% | 6.5 | 7% | 34% |
| July | 79% | 6.3 | 6% | 38% |
| August | 78% | 6.4 | 10% | 34% |
| September | 77% | 6.2 | 11% | 32% |
| October | 80% | 6.1 | 10% | 37% |
| November | 80% | 6.3 | 11% | 39% |
| December | 76% | 6.4 | 19% | 32% |
What Hilo's climate means for you
Hilo runs 74°F a year - peaking in August, coldest in February.
- Energy bills track 0 heating and 3,283 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Hilo, HI
Hilo, Hawaii runs an annual average of 74°F, ranging from a mean daily high of 81°F to a mean daily low of 67°F, per NOAA's 1991–2020 climate normals. August is typically the warmest month of the year, while February is the coldest. Drawn from 2 weather stations, these thirty-year averages smooth out year-to-year swings into a baseline for what a typical month looks like here.
Hilo averages 120.4 inches of precipitation a year, predominantly as rainfall, and that matters as much to daily life here as temperature does. Growing-season length varies with elevation and microclimate. As for energy demand, 0 heating degree days and 3,283 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Hilo scores 67/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above are the practical planning tool: mild highs and lows land in the shoulder seasons, August-driven heat peaks in summer, and February-driven cold sets in over deep winter. These are thirty-year averages, not a forecast - any single year can run warmer, wetter, drier, or cooler than the normal.
Frequently Asked Questions
What is the average temperature in Hilo, HI? ▼
The average annual temperature in Hilo, Hawaii is 74°F. The warmest month averages 83°F (29°C) and the coldest averages 64°F (18°C).
How much rain does Hilo get? ▼
Hilo receives 120.4 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Hilo? ▼
Hilo has a climate comfort score of 67/100 (Good), milder than 57% of U.S. cities in the PlainClimate database.
When is the growing season in Hilo? ▼
Growing season data is not available for Hilo.
How much energy does heating and cooling require in Hilo? ▼
Hilo has 0 heating degree days and 3,283 cooling degree days annually, a cooling-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Hilo climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from 2 weather stations near Hilo.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00021504. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.