Climate Comfort Score
54/100
Moderate
NOAA 1991–2020 normals 43°F annual avg Public-domain federal data
Copper Harbor, MI Climate
Temperature, precipitation, and comfort score from NOAA NCEI 1991–2020 normals →
- 43°F
- Avg annual temp
- 54/100
- Comfort score
- 26.0"
- Annual precip
- 164d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Copper Harbor
Copper Harbor, Michigan averages 43°F a year and scores 54/100 on the comfort index - moderate, milder than 27% of U.S. cities.
- 43°F
- yearly average temperature, NOAA normal
- 54/100
- comfort score, milder than 27% of U.S. cities
- 26.0"
- precipitation, annual total
- 164 days
- growing season, frost-free days
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
43°F (6°C)
Avg High
49°F
Avg Low
36°F
Annual Precip
26.0"
Comfort Score
54/100
Moderate
Avg Annual Temperature
43°F
30-year mean (NOAA NCEI)
Annual Precipitation
26.0"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Copper Harbor) 54.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Copper Harbor area.
How Copper Harbor compares to every U.S. city
Copper Harbor's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
54 Top 73% higher than 27% 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 Copper Harbor
MethodologyThe chart below traces how the U.S. land temperature anomaly has moved against the global mean since 1900. For Copper Harbor, the NOAA 1991-2020 normal captures average conditions across that spread - notably, the most recent decade runs warmer than the 30-year mean itself.
- 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 | 26°F (-3°C) | 15°F (-9°C) | 21°F (-6°C) | 1.9" | 30.2 | 0.0 |
| February | 27°F (-3°C) | 14°F (-10°C) | 20°F (-6°C) | 1.1" | 27.4 | 0.0 |
| March | 35°F (2°C) | 21°F (-6°C) | 28°F (-2°C) | 1.2" | 26.6 | 0.0 |
| April | 45°F (7°C) | 31°F (-1°C) | 38°F (3°C) | 2.2" | 17.4 | 0.0 |
| May | 58°F (14°C) | 41°F (5°C) | 49°F (10°C) | 2.8" | 2.5 | 0.0 |
| June | 67°F (19°C) | 49°F (9°C) | 58°F (14°C) | 2.5" | 0.0 | 0.2 |
| July | 72°F (22°C) | 57°F (14°C) | 65°F (18°C) | 2.5" | 0.0 | 0.2 |
| August | 72°F (22°C) | 58°F (15°C) | 65°F (18°C) | 2.3" | 0.0 | 0.3 |
| September | 65°F (19°C) | 51°F (11°C) | 58°F (15°C) | 3.1" | 0.1 | 0.0 |
| October | 52°F (11°C) | 41°F (5°C) | 47°F (8°C) | 2.7" | 3.4 | 0.0 |
| November | 41°F (5°C) | 30°F (-1°C) | 36°F (2°C) | 1.8" | 16.6 | 0.0 |
| December | 31°F (0°C) | 21°F (-6°C) | 26°F (-3°C) | 1.9" | 27.8 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 1.9"
15.2 days with precipitation
February 1.1"
11.8 days with precipitation
March 1.2"
8.5 days with precipitation
April 2.2"
10.1 days with precipitation
May 2.8"
11.5 days with precipitation
June 2.5"
11.6 days with precipitation
July 2.5"
9.4 days with precipitation
August 2.3"
9.1 days with precipitation
September 3.1"
11.2 days with precipitation
October 2.7"
15.3 days with precipitation
November 1.8"
14.5 days with precipitation
December 1.9"
16.1 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 21
50% probability date
Last Spring Freeze
May 10
50% probability date
Growing Season
164 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,347
Higher = more heating needed
Cooling Degree Days
189
Higher = more cooling needed
Warmest Month
August
Coldest Month
February
What Copper Harbor's climate means for you
Copper Harbor runs 43°F a year - peaking in August, coldest in February.
- Gardeners get about 164 frost-free days, with the last spring freeze near May 10 - plan the planting calendar around it, not the regional average.
- Energy bills track 8,347 heating and 189 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: Copper Harbor, MI
An annual average temperature of 43°F, ranging from a mean daily high of 49°F to a mean daily low of 36°F is what the NOAA 1991–2020 climate normals report for Copper Harbor, Michigan. August is typically the warmest month of the year, while February is the coldest. That baseline comes from station USW00094899 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.
Beyond temperature, Copper Harbor averages 26.0 inches of precipitation annually, predominantly as rainfall - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 164 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 10 and the first fall freeze near October 21. Turning to energy use, 8,347 heating degree days and 189 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Copper Harbor scores 54/100 (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 August-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 Copper Harbor, MI? ▼
The average annual temperature in Copper Harbor, Michigan is 43°F. The warmest month averages 72°F (22°C) and the coldest averages 14°F (-10°C).
How much rain does Copper Harbor get? ▼
Copper Harbor receives 26.0 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Copper Harbor? ▼
Copper Harbor has a climate comfort score of 54/100 (Moderate), milder than 27% of U.S. cities in the PlainClimate database.
When is the growing season in Copper Harbor? ▼
Copper Harbor has approximately 164 frost-free days per year, with the last spring freeze around May 10 and the first fall freeze around October 21.
How much energy does heating and cooling require in Copper Harbor? ▼
Copper Harbor has 8,347 heating degree days and 189 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 Copper Harbor climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USW00094899 near Copper Harbor.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00094899. 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.