Climate Comfort Score
58/100
Moderate
NOAA 1991–2020 normals 46°F annual avg Public-domain federal data
Mauna Loa, HI Climate
Explore average temperature, rainfall, and comfort score sourced from NOAA NCEI's 1991–2020 climate normals →
- 46°F
- Avg annual temp
- 58/100
- Comfort score
- 14.3"
- Annual precip
- 233d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Mauna Loa
Mauna Loa, Hawaii averages 46°F a year and scores 58/100 on the comfort index - moderate, milder than 38% of U.S. cities.
- 46°F
- average temperature, NOAA 1991-2020 normal
- 58/100
- comfort score, milder than 38% of U.S. cities
- 14.3"
- annual precipitation
- 233 days
- frost-free days per growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
46°F (8°C)
Avg High
54°F
Avg Low
38°F
Annual Precip
14.3"
Comfort Score
58/100
Moderate
Avg Annual Temperature
46°F
30-year mean (NOAA NCEI)
Annual Precipitation
14.3"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Mauna Loa) 58.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Mauna Loa area.
How Mauna Loa compares to every U.S. city
Mauna Loa's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
58 Top 62% higher than 38% 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 Mauna Loa
MethodologySince 1900, U.S. land temperatures have tracked (and diverged from) the global mean - the chart below shows how. Mauna Loa's current NOAA 1991-2020 normal sits within that longer spread, and the most recent decade runs 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 | 51°F (11°C) | 35°F (2°C) | 43°F (6°C) | 1.1" | 6.3 | 0.0 |
| February | 50°F (10°C) | 34°F (1°C) | 42°F (6°C) | 1.0" | 9.1 | 0.0 |
| March | 51°F (10°C) | 35°F (2°C) | 43°F (6°C) | 1.9" | 7.0 | 0.0 |
| April | 53°F (12°C) | 37°F (3°C) | 45°F (7°C) | 0.9" | 3.6 | 0.0 |
| May | 56°F (13°C) | 39°F (4°C) | 47°F (9°C) | 0.6" | 0.9 | 0.0 |
| June | 58°F (14°C) | 41°F (5°C) | 49°F (10°C) | 0.4" | 0.2 | 0.0 |
| July | 58°F (14°C) | 41°F (5°C) | 49°F (10°C) | 1.3" | 0.2 | 0.0 |
| August | 57°F (14°C) | 41°F (5°C) | 49°F (9°C) | 2.4" | 0.1 | 0.0 |
| September | 57°F (14°C) | 41°F (5°C) | 49°F (9°C) | 0.7" | 0.0 | 0.0 |
| October | 56°F (13°C) | 40°F (4°C) | 48°F (9°C) | 1.5" | 0.1 | 0.0 |
| November | 52°F (11°C) | 37°F (3°C) | 45°F (7°C) | 1.2" | 2.3 | 0.0 |
| December | 51°F (11°C) | 36°F (2°C) | 43°F (6°C) | 1.3" | 4.4 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 1.1"
3.9 days with precipitation
February 1.0"
5.7 days with precipitation
March 1.9"
6.8 days with precipitation
April 0.9"
4.1 days with precipitation
May 0.6"
4.1 days with precipitation
June 0.4"
2.1 days with precipitation
July 1.3"
3.7 days with precipitation
August 2.4"
6.0 days with precipitation
September 0.7"
4.8 days with precipitation
October 1.5"
4.9 days with precipitation
November 1.2"
4.6 days with precipitation
December 1.3"
5.6 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
December 1
50% probability date
Last Spring Freeze
April 12
50% probability date
Growing Season
233 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,919
Higher = more heating needed
Cooling Degree Days
0
Higher = more cooling needed
Warmest Month
June
Coldest Month
February
What Mauna Loa's climate means for you
Mauna Loa runs 46°F a year - peaking in June, coldest in February.
- Gardeners get about 233 frost-free days, with the last spring freeze near April 12 - plan the planting calendar around it, not the regional average.
- Energy bills track 6,919 heating and 0 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: Mauna Loa, HI
Based on station USW00021514 feeding NOAA's 1991–2020 climate normals, Mauna Loa, Hawaii averages 46°F a year, ranging from a mean daily high of 54°F to a mean daily low of 38°F. June is typically the warmest month of the year, while February is the coldest. Because these figures are thirty-year averages rather than any single year's readings, they describe the typical month, not a forecast for it.
Beyond temperature, Mauna Loa averages 14.3 inches of precipitation annually, predominantly as rainfall - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 233 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 12 and the first fall freeze near December 1. Turning to energy use, 6,919 heating degree days and 0 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Mauna Loa scores 58/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Shoulder seasons bring the mildest highs and lows in the monthly tables above, summer brings June-driven heat, and winter brings February-driven cold - use that rhythm for planning. These figures are thirty-year averages rather than forecasts, so a specific year may still run warmer, cooler, wetter, or drier than what's shown.
Frequently Asked Questions
What is the average temperature in Mauna Loa, HI? ▼
The average annual temperature in Mauna Loa, Hawaii is 46°F. The warmest month averages 58°F (14°C) and the coldest averages 34°F (1°C).
How much rain does Mauna Loa get? ▼
Mauna Loa receives 14.3 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Mauna Loa? ▼
Mauna Loa has a climate comfort score of 58/100 (Moderate), milder than 38% of U.S. cities in the PlainClimate database.
When is the growing season in Mauna Loa? ▼
Mauna Loa has approximately 233 frost-free days per year, with the last spring freeze around April 12 and the first fall freeze around December 1.
How much energy does heating and cooling require in Mauna Loa? ▼
Mauna Loa has 6,919 heating degree days and 0 cooling degree days annually, a heating-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 Mauna Loa climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USW00021514 near Mauna Loa.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00021514. 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.