Climate Comfort Score
54/100
Moderate
NOAA 1991–2020 normals 40°F annual avg Public-domain federal data
Mahnomen, MN Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 40°F
- Avg annual temp
- 54/100
- Comfort score
- 26.4"
- Annual precip
- 144d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Mahnomen
Mahnomen, Minnesota averages 40°F a year and scores 54/100 on the comfort index - moderate, milder than 27% of U.S. cities.
- 40°F
- average temperature, NOAA 1991-2020 normal
- 54/100
- comfort score, milder than 27% of U.S. cities
- 26.4"
- precipitation, annual total
- 144 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
40°F (4°C)
Avg High
50°F
Avg Low
30°F
Annual Precip
26.4"
Comfort Score
54/100
Moderate
Avg Annual Temperature
40°F
30-year mean (NOAA NCEI)
Annual Precipitation
26.4"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Mahnomen) 54.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Mahnomen area.
How Mahnomen compares to every U.S. city
Mahnomen'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 Mahnomen
MethodologyMahnomen'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 | 15°F (-9°C) | -2°F (-19°C) | 6°F (-14°C) | 0.8" | 30.9 | 0.0 |
| February | 21°F (-6°C) | 2°F (-17°C) | 11°F (-11°C) | 0.7" | 27.4 | 0.0 |
| March | 34°F (1°C) | 15°F (-9°C) | 25°F (-4°C) | 1.1" | 27.7 | 0.0 |
| April | 52°F (11°C) | 30°F (-1°C) | 41°F (5°C) | 1.7" | 19.3 | 0.0 |
| May | 66°F (19°C) | 43°F (6°C) | 55°F (13°C) | 3.1" | 4.3 | 0.3 |
| June | 74°F (23°C) | 54°F (12°C) | 64°F (18°C) | 4.7" | 0.0 | 1.3 |
| July | 79°F (26°C) | 58°F (14°C) | 68°F (20°C) | 3.8" | 0.0 | 1.7 |
| August | 78°F (26°C) | 55°F (13°C) | 67°F (19°C) | 3.4" | 0.0 | 1.8 |
| September | 69°F (21°C) | 47°F (8°C) | 58°F (14°C) | 2.8" | 2.7 | 0.2 |
| October | 54°F (12°C) | 34°F (1°C) | 44°F (7°C) | 2.3" | 13.9 | 0.0 |
| November | 34°F (1°C) | 20°F (-7°C) | 27°F (-3°C) | 1.0" | 28.1 | 0.0 |
| December | 22°F (-6°C) | 6°F (-15°C) | 14°F (-10°C) | 1.1" | 30.9 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 0.8"
February 0.7"
March 1.1"
April 1.7"
May 3.1"
June 4.7"
July 3.8"
August 3.4"
September 2.8"
October 2.3"
November 1.0"
December 1.1"
Frost Dates & Growing Season
First Fall Freeze
September 28
50% probability date
Last Spring Freeze
May 7
50% probability date
Growing Season
144 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
9,470
Higher = more heating needed
Cooling Degree Days
362
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Mahnomen's climate means for you
Mahnomen runs 40°F a year - peaking in July, coldest in January.
- Gardeners get about 144 frost-free days, with the last spring freeze near May 7 - plan the planting calendar around it, not the regional average.
- Energy bills track 9,470 heating and 362 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: Mahnomen, MN
Mahnomen, Minnesota runs an annual average of 40°F, ranging from a mean daily high of 50°F to a mean daily low of 30°F, per NOAA's 1991–2020 climate normals. July is typically the warmest month of the year, while January is the coldest. Drawn from station USC00215012, these thirty-year averages smooth out year-to-year swings into a baseline for what a typical month looks like here.
Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Mahnomen sees about 26.4 inches of precipitation a year, predominantly as rainfall. The frost-free season averages 144 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 7 and the first fall freeze near September 28. On the energy side, 9,470 heating degree days and 362 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Mahnomen scores 54/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Use the monthly tables above to plan around specific windows, shoulder seasons for mild highs and lows, peak summer for July-driven heat, or deep winter for January-driven cold. All figures here are thirty-year averages: any single year may run warmer, wetter, drier, or cooler than the normal, so treat them as planning guidance rather than forecasts.
Frequently Asked Questions
What is the average temperature in Mahnomen, MN? ▼
The average annual temperature in Mahnomen, Minnesota is 40°F. The warmest month averages 79°F (26°C) and the coldest averages -2°F (-19°C).
How much rain does Mahnomen get? ▼
Mahnomen receives 26.4 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Mahnomen? ▼
Mahnomen 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 Mahnomen? ▼
Mahnomen has approximately 144 frost-free days per year, with the last spring freeze around May 7 and the first fall freeze around September 28.
How much energy does heating and cooling require in Mahnomen? ▼
Mahnomen has 9,470 heating degree days and 362 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 Mahnomen climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00215012 near Mahnomen.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00215012. 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.