Climate Comfort Score
39/100
Below Average
NOAA 1991–2020 normals 40°F annual avg Public-domain federal data
Ironwood, MI Climate
Temperature, precipitation, and comfort score from NOAA NCEI 1991–2020 normals →
- 40°F
- Avg annual temp
- 39/100
- Comfort score
- 132d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Ironwood
Ironwood, Michigan averages 40°F a year and scores 39/100 on the comfort index - below average, milder than 4% of U.S. cities.
- 40°F
- annual average temperature (NOAA normal)
- 39/100
- comfort score, milder than 4% of U.S. cities
- 132 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
40°F (5°C)
Avg High
51°F
Avg Low
30°F
Annual Precip
N/A
Comfort Score
39/100
Below Average
Avg Annual Temperature
40°F
30-year mean (NOAA NCEI)
Annual Precipitation
N/A
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Ironwood) 39.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Below Average for the Ironwood area.
How Ironwood compares to every U.S. city
Ironwood'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 Ironwood
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Ironwood captures average conditions across the spread shown, the most recent decade is 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 | 20°F (-6°C) | 2°F (-17°C) | 11°F (-12°C) | N/A | 31.0 | 0.0 |
| February | 26°F (-3°C) | 4°F (-15°C) | 15°F (-9°C) | N/A | 28.0 | 0.0 |
| March | 37°F (3°C) | 14°F (-10°C) | 26°F (-4°C) | N/A | 29.5 | 0.0 |
| April | 49°F (10°C) | 27°F (-3°C) | 38°F (3°C) | N/A | 23.5 | 0.0 |
| May | 64°F (18°C) | 40°F (5°C) | 52°F (11°C) | N/A | 11.6 | 0.0 |
| June | 73°F (23°C) | 50°F (10°C) | 62°F (16°C) | N/A | 0.5 | 0.5 |
| July | 77°F (25°C) | 55°F (13°C) | 66°F (19°C) | N/A | 0.0 | 0.5 |
| August | 76°F (24°C) | 52°F (11°C) | 64°F (18°C) | N/A | 0.0 | 0.0 |
| September | 68°F (20°C) | 46°F (8°C) | 57°F (14°C) | N/A | 1.6 | 0.0 |
| October | 53°F (12°C) | 34°F (1°C) | 44°F (7°C) | N/A | 18.2 | 0.0 |
| November | 38°F (3°C) | 23°F (-5°C) | 30°F (-1°C) | N/A | 27.7 | 0.0 |
| December | 26°F (-3°C) | 11°F (-12°C) | 19°F (-7°C) | N/A | 31.0 | 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
September 28
50% probability date
Last Spring Freeze
May 19
50% probability date
Growing Season
132 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
9,136
Higher = more heating needed
Cooling Degree Days
126
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Ironwood's climate means for you
Ironwood runs 40°F a year - peaking in July, coldest in January.
- Gardeners get about 132 frost-free days, with the last spring freeze near May 19 - plan the planting calendar around it, not the regional average.
- Energy bills track 9,136 heating and 126 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: Ironwood, MI
In Ironwood, Michigan, the NOAA 1991–2020 climate normals put the annual average temperature at 40°F, ranging from a mean daily high of 51°F to a mean daily low of 30°F. July is typically the warmest month of the year, while January is the coldest. As thirty-year averages computed from station USC00204105, these numbers smooth out year-to-year noise into a working baseline for a typical month.
Beyond temperature, Ironwood averages an uncharted amount of precipitation annually, predominantly as rainfall - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 132 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 19 and the first fall freeze near September 28. Turning to energy use, 9,136 heating degree days and 126 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Ironwood 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 July-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 Ironwood, MI? ▼
The average annual temperature in Ironwood, Michigan is 40°F. The warmest month averages 77°F (25°C) and the coldest averages 2°F (-17°C).
How much rain does Ironwood get? ▼
Ironwood receives an unknown amount of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Ironwood? ▼
Ironwood 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 Ironwood? ▼
Ironwood has approximately 132 frost-free days per year, with the last spring freeze around May 19 and the first fall freeze around September 28.
How much energy does heating and cooling require in Ironwood? ▼
Ironwood has 9,136 heating degree days and 126 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 Ironwood climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00204105 near Ironwood.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00204105. 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.