Climate Comfort Score
39/100
Below Average
NOAA 1991–2020 normals 41°F annual avg Public-domain federal data
Duluth Harbor Stn, MN Climate
Average temperature, precipitation, and a comfort score, drawn from NOAA NCEI 1991–2020 normals →
- 41°F
- Avg annual temp
- 39/100
- Comfort score
- 151d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Duluth Harbor Stn
Duluth Harbor Stn, Minnesota averages 41°F a year and scores 39/100 on the comfort index - below average, milder than 4% of U.S. cities.
- 41°F
- annual average temperature (NOAA normal)
- 39/100
- comfort score, milder than 4% of U.S. cities
- 151 days
- frost-free growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
41°F (5°C)
Avg High
49°F
Avg Low
33°F
Annual Precip
N/A
Comfort Score
39/100
Below Average
Avg Annual Temperature
41°F
30-year mean (NOAA NCEI)
Annual Precipitation
N/A
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Duluth Harbor Stn) 39.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Below Average for the Duluth Harbor Stn area.
How Duluth Harbor Stn compares to every U.S. city
Duluth Harbor Stn's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
39 Top 96% higher than 4% 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 Duluth Harbor Stn
MethodologyDuluth Harbor Stn'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 | 21°F (-6°C) | 4°F (-15°C) | 13°F (-11°C) | N/A | 30.9 | 0.0 |
| February | 26°F (-4°C) | 8°F (-13°C) | 17°F (-8°C) | N/A | 27.8 | 0.0 |
| March | 35°F (2°C) | 19°F (-7°C) | 27°F (-3°C) | N/A | 28.1 | 0.0 |
| April | 45°F (7°C) | 31°F (-1°C) | 38°F (3°C) | N/A | 17.0 | 0.0 |
| May | 56°F (13°C) | 41°F (5°C) | 48°F (9°C) | N/A | 1.9 | 0.0 |
| June | 66°F (19°C) | 49°F (9°C) | 58°F (14°C) | N/A | 0.1 | 0.2 |
| July | 75°F (24°C) | 58°F (14°C) | 66°F (19°C) | N/A | 0.0 | 1.0 |
| August | 74°F (24°C) | 60°F (15°C) | 67°F (19°C) | N/A | 0.1 | 0.9 |
| September | 66°F (19°C) | 51°F (10°C) | 59°F (15°C) | N/A | 0.2 | 0.0 |
| October | 52°F (11°C) | 39°F (4°C) | 45°F (7°C) | N/A | 6.7 | 0.0 |
| November | 39°F (4°C) | 26°F (-3°C) | 32°F (0°C) | N/A | 22.9 | 0.0 |
| December | 27°F (-3°C) | 13°F (-11°C) | 20°F (-7°C) | N/A | 30.0 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January N/A
February N/A
March N/A
April N/A
May N/A
June N/A
July N/A
August N/A
September N/A
October N/A
November N/A
December N/A
Frost Dates & Growing Season
First Fall Freeze
October 12
50% probability date
Last Spring Freeze
May 14
50% probability date
Growing Season
151 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
9,048
Higher = more heating needed
Cooling Degree Days
259
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
What Duluth Harbor Stn's climate means for you
Duluth Harbor Stn runs 41°F a year - peaking in August, coldest in January.
- Gardeners get about 151 frost-free days, with the last spring freeze near May 14 - plan the planting calendar around it, not the regional average.
- Energy bills track 9,048 heating and 259 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: Duluth Harbor Stn, MN
Duluth Harbor Stn, Minnesota runs an annual average of 41°F, ranging from a mean daily high of 49°F to a mean daily low of 33°F, per NOAA's 1991–2020 climate normals. August is typically the warmest month of the year, while January is the coldest. Drawn from station USC00212246, these thirty-year averages smooth out year-to-year swings into a baseline for what a typical month looks like here.
Anyone planning to live, garden, or travel in Duluth Harbor Stn should weigh precipitation alongside temperature: the annual average runs an uncharted amount, predominantly as rainfall. The frost-free season averages 151 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 14 and the first fall freeze near October 12. And on the energy front, 9,048 heating degree days and 259 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Duluth Harbor Stn scores 39/100 (Below Average), 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 January-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 Duluth Harbor Stn, MN? ▼
The average annual temperature in Duluth Harbor Stn, Minnesota is 41°F. The warmest month averages 75°F (24°C) and the coldest averages 4°F (-15°C).
How much rain does Duluth Harbor Stn get? ▼
Duluth Harbor Stn receives an unknown amount of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Duluth Harbor Stn? ▼
Duluth Harbor Stn has a climate comfort score of 39/100 (Below Average), milder than 4% of U.S. cities in the PlainClimate database.
When is the growing season in Duluth Harbor Stn? ▼
Duluth Harbor Stn has approximately 151 frost-free days per year, with the last spring freeze around May 14 and the first fall freeze around October 12.
How much energy does heating and cooling require in Duluth Harbor Stn? ▼
Duluth Harbor Stn has 9,048 heating degree days and 259 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 Duluth Harbor Stn climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00212246 near Duluth Harbor Stn.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00212246. 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.