Climate Comfort Score
44/100
Moderate
NOAA 1991–2020 normals 42°F annual avg Public-domain federal data
Mystic Lake, MT Climate
Pulled from NOAA NCEI 1991–2020 normals →: average temperature, precipitation, and comfort score
- 42°F
- Avg annual temp
- 44/100
- Comfort score
- 26.5"
- Annual precip
- 101d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Mystic Lake
Mystic Lake, Montana averages 42°F a year and scores 44/100 on the comfort index - moderate, milder than 8% of U.S. cities.
- 42°F
- annual average temperature (NOAA normal)
- 44/100
- comfort score, milder than 8% of U.S. cities
- 26.5"
- annual precipitation · 193" snow
- 101 days
- growing season, frost-free days
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
42°F (5°C)
Avg High
52°F
Avg Low
31°F
Annual Precip
26.5"
Annual Snow
192.7"
Comfort Score
44/100
Moderate
Avg Annual Temperature
42°F
30-year mean (NOAA NCEI)
Annual Precipitation
26.5"
Plus 192.7" of snow
Comfort score vs national 100-point ceiling (Mystic Lake) 44.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Mystic Lake area.
How Mystic Lake compares to every U.S. city
Mystic Lake's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
44 Top 92% higher than 8% 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 Mystic Lake
MethodologyZooming out from Mystic Lake'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 | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 35°F (1°C) | 19°F (-7°C) | 27°F (-3°C) | 1.1" | 17.4" | 26.4 | 0.0 |
| February | 34°F (1°C) | 17°F (-8°C) | 26°F (-4°C) | 1.5" | 25.3" | 24.7 | 0.0 |
| March | 41°F (5°C) | 22°F (-5°C) | 32°F (0°C) | 2.0" | 31.6" | 25.5 | 0.0 |
| April | 48°F (9°C) | 27°F (-3°C) | 37°F (3°C) | 2.7" | 34.0" | 21.1 | 0.0 |
| May | 57°F (14°C) | 35°F (2°C) | 46°F (8°C) | 4.1" | 14.6" | 10.7 | 0.0 |
| June | 66°F (19°C) | 43°F (6°C) | 54°F (12°C) | 3.0" | 1.7" | 1.5 | 0.0 |
| July | 75°F (24°C) | 50°F (10°C) | 62°F (17°C) | 2.3" | 0.0" | 0.0 | 0.2 |
| August | 74°F (23°C) | 50°F (10°C) | 62°F (17°C) | 1.9" | 0.0" | 0.2 | 0.1 |
| September | 66°F (19°C) | 42°F (5°C) | 54°F (12°C) | 2.0" | 3.8" | 4.1 | 0.0 |
| October | 52°F (11°C) | 32°F (0°C) | 42°F (6°C) | 2.5" | 20.1" | 14.5 | 0.0 |
| November | 40°F (4°C) | 24°F (-4°C) | 32°F (0°C) | 1.9" | 22.6" | 21.4 | 0.0 |
| December | 33°F (0°C) | 18°F (-8°C) | 25°F (-4°C) | 1.4" | 21.6" | 27.6 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 1.1"
Snow: 17.4"
7.9 days with precipitation
February 1.5"
Snow: 25.3"
9.2 days with precipitation
March 2.0"
Snow: 31.6"
11.2 days with precipitation
April 2.7"
Snow: 34.0"
12.4 days with precipitation
May 4.1"
Snow: 14.6"
14.1 days with precipitation
June 3.0"
Snow: 1.7"
14.4 days with precipitation
July 2.3"
12.1 days with precipitation
August 1.9"
11.7 days with precipitation
September 2.0"
Snow: 3.8"
9.2 days with precipitation
October 2.5"
Snow: 20.1"
10.3 days with precipitation
November 1.9"
Snow: 22.6"
9.1 days with precipitation
December 1.4"
Snow: 21.6"
9.6 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
September 14
50% probability date
Last Spring Freeze
June 5
50% probability date
Growing Season
101 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,605
Higher = more heating needed
Cooling Degree Days
81
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
What Mystic Lake's climate means for you
Mystic Lake runs 42°F a year - peaking in July, coldest in December.
- Gardeners get about 101 frost-free days, with the last spring freeze near June 5 - plan the planting calendar around it, not the regional average.
- Energy bills track 8,605 heating and 81 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: Mystic Lake, MT
The NOAA 1991–2020 climate normals describe Mystic Lake, Montana as a location with an annual average temperature of 42°F, ranging from a mean daily high of 52°F to a mean daily low of 31°F. July is typically the warmest month of the year, while December is the coldest. These thirty-year averages, computed from station USC00245961, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Beyond temperature, Mystic Lake averages 26.5 inches of precipitation annually, with 192.7 inches typically falling as snow - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 101 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near June 5 and the first fall freeze near September 14. Turning to energy use, 8,605 heating degree days and 81 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Mystic Lake scores 44/100 (Moderate), 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 December-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 Mystic Lake, MT? ▼
The average annual temperature in Mystic Lake, Montana is 42°F. The warmest month averages 75°F (24°C) and the coldest averages 17°F (-8°C).
How much rain does Mystic Lake get? ▼
Mystic Lake receives 26.5 inches of precipitation annually, including 192.7 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Mystic Lake? ▼
Mystic Lake has a climate comfort score of 44/100 (Moderate), milder than 8% of U.S. cities in the PlainClimate database.
When is the growing season in Mystic Lake? ▼
Mystic Lake has approximately 101 frost-free days per year, with the last spring freeze around June 5 and the first fall freeze around September 14.
How much energy does heating and cooling require in Mystic Lake? ▼
Mystic Lake has 8,605 heating degree days and 81 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 Mystic Lake climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00245961 near Mystic Lake.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00245961. 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.