Climate Comfort Score
64/100
Good
NOAA 1991–2020 normals 45°F annual avg Public-domain federal data
Mullan, ID Climate
Pulled from NOAA NCEI 1991–2020 normals →: average temperature, precipitation, and comfort score
- 45°F
- Avg annual temp
- 64/100
- Comfort score
- 36.6"
- Annual precip
- 141d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Mullan
Mullan, Idaho averages 45°F a year and scores 64/100 on the comfort index - good, milder than 51% of U.S. cities.
- 45°F
- annual average temperature (NOAA normal)
- 64/100
- comfort score, milder than 51% of U.S. cities
- 36.6"
- annual precipitation
- 141 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
45°F (7°C)
Avg High
56°F
Avg Low
34°F
Annual Precip
36.6"
Comfort Score
64/100
Good
Avg Annual Temperature
45°F
30-year mean (NOAA NCEI)
Annual Precipitation
36.6"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Mullan) 64.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Mullan area.
How Mullan compares to every U.S. city
Mullan'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 Mullan
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Mullan 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 | 35°F (2°C) | 23°F (-5°C) | 29°F (-2°C) | 4.1" | 28.7 | 0.0 |
| February | 39°F (4°C) | 22°F (-5°C) | 31°F (-1°C) | 3.5" | 24.0 | 0.0 |
| March | 46°F (8°C) | 27°F (-3°C) | 37°F (3°C) | 4.5" | 25.4 | 0.0 |
| April | 55°F (13°C) | 32°F (0°C) | 44°F (6°C) | 3.0" | 13.5 | 0.0 |
| May | 65°F (19°C) | 40°F (5°C) | 53°F (12°C) | 2.5" | 3.2 | 0.1 |
| June | 71°F (22°C) | 45°F (7°C) | 58°F (15°C) | 3.0" | 0.3 | 0.8 |
| July | 81°F (27°C) | 49°F (10°C) | 65°F (18°C) | 0.9" | 0.1 | 4.2 |
| August | 81°F (27°C) | 48°F (9°C) | 65°F (18°C) | 1.0" | 0.1 | 4.6 |
| September | 71°F (22°C) | 42°F (5°C) | 56°F (13°C) | 1.6" | 2.2 | 0.5 |
| October | 55°F (13°C) | 34°F (1°C) | 44°F (7°C) | 3.9" | 13.2 | 0.0 |
| November | 41°F (5°C) | 27°F (-3°C) | 34°F (1°C) | 4.7" | 23.1 | 0.0 |
| December | 32°F (0°C) | 22°F (-5°C) | 27°F (-3°C) | 3.8" | 28.7 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 4.1"
February 3.5"
March 4.5"
April 3.0"
May 2.5"
June 3.0"
July 0.9"
August 1.0"
September 1.6"
October 3.9"
November 4.7"
December 3.8"
Frost Dates & Growing Season
First Fall Freeze
September 30
50% probability date
Last Spring Freeze
May 12
50% probability date
Growing Season
141 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,417
Higher = more heating needed
Cooling Degree Days
202
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
What Mullan's climate means for you
Mullan runs 45°F a year - peaking in July, coldest in December.
- Gardeners get about 141 frost-free days, with the last spring freeze near May 12 - plan the planting calendar around it, not the regional average.
- Energy bills track 7,417 heating and 202 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: Mullan, ID
The NOAA 1991–2020 climate normals describe Mullan, Idaho as a location with an annual average temperature of 45°F, ranging from a mean daily high of 56°F to a mean daily low of 34°F. July is typically the warmest month of the year, while December is the coldest. These thirty-year averages, computed from station USC00106230, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Mullan averages 36.6 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 141 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 12 and the first fall freeze near September 30. As for energy demand, 7,417 heating degree days and 202 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Mullan scores 64/100 (Good), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above turn that into a planning tool: expect the mildest highs and lows in the shoulder seasons, July-driven heat at the peak of summer, and December-driven cold at the depth of winter. Every number here is a thirty-year average, not a forecast, so any given year can and does run warmer, cooler, wetter, or drier than the normal.
Frequently Asked Questions
What is the average temperature in Mullan, ID? ▼
The average annual temperature in Mullan, Idaho is 45°F. The warmest month averages 81°F (27°C) and the coldest averages 22°F (-5°C).
How much rain does Mullan get? ▼
Mullan receives 36.6 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Mullan? ▼
Mullan 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 Mullan? ▼
Mullan has approximately 141 frost-free days per year, with the last spring freeze around May 12 and the first fall freeze around September 30.
How much energy does heating and cooling require in Mullan? ▼
Mullan has 7,417 heating degree days and 202 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 Mullan climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00106230 near Mullan.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00106230. 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.