Climate Comfort Score
64/100
Good
NOAA 1991–2020 normals 48°F annual avg Public-domain federal data
Ann Arbor Muni, MI Climate
Temperature, precipitation, and comfort score from NOAA NCEI 1991–2020 normals →
- 48°F
- Avg annual temp
- 64/100
- Comfort score
- 29.8"
- Annual precip
- 149d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Ann Arbor Muni
Ann Arbor Muni, Michigan averages 48°F a year and scores 64/100 on the comfort index - good, milder than 51% of U.S. cities.
- 48°F
- yearly average temperature, NOAA normal
- 64/100
- comfort score, milder than 51% of U.S. cities
- 29.8"
- precipitation, annual total
- 149 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
48°F (9°C)
Avg High
59°F
Avg Low
37°F
Annual Precip
29.8"
Comfort Score
64/100
Good
Avg Annual Temperature
48°F
30-year mean (NOAA NCEI)
Annual Precipitation
29.8"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Ann Arbor Muni) 64.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Ann Arbor Muni area.
How Ann Arbor Muni compares to every U.S. city
Ann Arbor Muni's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
64 Top 49% higher than 51% 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 Ann Arbor Muni
MethodologyZooming out from Ann Arbor Muni's own normal, the chart below shows how the U.S. land temperature anomaly has tracked the global mean since 1900 - the most recent decade sits warmer than the 30-year mean shown here.
- 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 | 32°F (0°C) | 15°F (-9°C) | 24°F (-5°C) | 1.7" | 28.5 | 0.0 |
| February | 35°F (1°C) | 16°F (-9°C) | 25°F (-4°C) | 1.5" | 26.3 | 0.0 |
| March | 45°F (7°C) | 25°F (-4°C) | 35°F (2°C) | 1.9" | 24.2 | 0.0 |
| April | 59°F (15°C) | 35°F (2°C) | 47°F (8°C) | 3.0" | 11.7 | 0.0 |
| May | 70°F (21°C) | 46°F (8°C) | 58°F (14°C) | 3.4" | 2.5 | 0.2 |
| June | 79°F (26°C) | 54°F (12°C) | 66°F (19°C) | 3.6" | 0.0 | 2.2 |
| July | 84°F (29°C) | 57°F (14°C) | 71°F (21°C) | 3.2" | 0.0 | 5.3 |
| August | 81°F (27°C) | 57°F (14°C) | 69°F (21°C) | 2.7" | 0.0 | 2.1 |
| September | 74°F (23°C) | 48°F (9°C) | 61°F (16°C) | 2.8" | 0.7 | 1.1 |
| October | 62°F (16°C) | 38°F (3°C) | 50°F (10°C) | 2.2" | 9.5 | 0.0 |
| November | 48°F (9°C) | 30°F (-1°C) | 39°F (4°C) | 2.1" | 19.6 | 0.0 |
| December | 36°F (2°C) | 22°F (-6°C) | 29°F (-2°C) | 1.7" | 26.5 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 1.7"
10.4 days with precipitation
February 1.5"
8.9 days with precipitation
March 1.9"
10.1 days with precipitation
April 3.0"
12.3 days with precipitation
May 3.4"
13.9 days with precipitation
June 3.6"
11.1 days with precipitation
July 3.2"
10.7 days with precipitation
August 2.7"
12.0 days with precipitation
September 2.8"
11.6 days with precipitation
October 2.2"
12.0 days with precipitation
November 2.1"
10.0 days with precipitation
December 1.7"
11.4 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 4
50% probability date
Last Spring Freeze
May 8
50% probability date
Growing Season
149 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,742
Higher = more heating needed
Cooling Degree Days
520
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Ann Arbor Muni's climate means for you
Ann Arbor Muni runs 48°F a year - peaking in July, coldest in January.
- Gardeners get about 149 frost-free days, with the last spring freeze near May 8 - plan the planting calendar around it, not the regional average.
- Energy bills track 6,742 heating and 520 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: Ann Arbor Muni, MI
Based on station USW00094889 feeding NOAA's 1991–2020 climate normals, Ann Arbor Muni, Michigan averages 48°F a year, ranging from a mean daily high of 59°F to a mean daily low of 37°F. July is typically the warmest month of the year, while January 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.
Ann Arbor Muni averages 29.8 inches of precipitation a year, predominantly as rainfall, and that matters as much to daily life here as temperature does. The frost-free season averages 149 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 8 and the first fall freeze near October 4. As for energy demand, 6,742 heating degree days and 520 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Ann Arbor Muni scores 64/100 (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, July-driven heat peaks in summer, and January-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 Ann Arbor Muni, MI? ▼
The average annual temperature in Ann Arbor Muni, Michigan is 48°F. The warmest month averages 84°F (29°C) and the coldest averages 15°F (-9°C).
How much rain does Ann Arbor Muni get? ▼
Ann Arbor Muni receives 29.8 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Ann Arbor Muni? ▼
Ann Arbor Muni has a climate comfort score of 64/100 (Good), milder than 51% of U.S. cities in the PlainClimate database.
When is the growing season in Ann Arbor Muni? ▼
Ann Arbor Muni has approximately 149 frost-free days per year, with the last spring freeze around May 8 and the first fall freeze around October 4.
How much energy does heating and cooling require in Ann Arbor Muni? ▼
Ann Arbor Muni has 6,742 heating degree days and 520 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 Ann Arbor Muni climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USW00094889 near Ann Arbor Muni.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00094889. 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.