Climate Comfort Score
57/100
Moderate
2026 data Public-data reference. official source
Big Sky, MT Climate
Temperature, precipitation, and comfort score from NOAA NCEI 1991-2020 normals →
30-year climate normals from 1 weather station (1991-2020).
Big Sky, Montana has an average annual temperature of 38°F and a climate comfort score of 57/100 (Moderate). Annual precipitation totals 23.3". Based on NOAA 30-year normals (1991–2020).
Avg Temperature
38°F (3°C)
Avg High
52°F
Avg Low
24°F
Annual Precip
23.3"
Comfort Score
57/100
Moderate
Avg Annual Temperature
38°F
30-year mean (NOAA NCEI)
Annual Precipitation
23.3"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Big Sky) 57.0%
National median (≈55)
PlainClimate composite — temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Big Sky area.
Warming context for Big Sky
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Big Sky 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 | 30°F (-1°C) | 9°F (-13°C) | 19°F (-7°C) | 1.8" | 31.0 | 0.0 |
| February | 34°F (1°C) | 9°F (-13°C) | 22°F (-6°C) | 1.5" | 27.9 | 0.0 |
| March | 42°F (6°C) | 17°F (-9°C) | 29°F (-1°C) | 1.9" | 30.5 | 0.0 |
| April | 48°F (9°C) | 23°F (-5°C) | 35°F (2°C) | 2.4" | 28.9 | 0.0 |
| May | 58°F (15°C) | 30°F (-1°C) | 44°F (7°C) | 2.8" | 22.3 | 0.0 |
| June | 67°F (19°C) | 36°F (2°C) | 51°F (11°C) | 3.2" | 9.6 | 0.0 |
| July | 78°F (25°C) | 41°F (5°C) | 60°F (15°C) | 1.3" | 1.7 | 1.0 |
| August | 77°F (25°C) | 39°F (4°C) | 58°F (14°C) | 1.6" | 2.6 | 0.3 |
| September | 68°F (20°C) | 33°F (1°C) | 51°F (10°C) | 1.7" | 15.2 | 0.0 |
| October | 53°F (12°C) | 25°F (-4°C) | 39°F (4°C) | 1.8" | 27.4 | 0.0 |
| November | 37°F (3°C) | 16°F (-9°C) | 26°F (-3°C) | 1.6" | 29.4 | 0.0 |
| December | 28°F (-2°C) | 9°F (-13°C) | 18°F (-8°C) | 1.7" | 31.0 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 1.8"
12.6 days with precipitation
February 1.5"
11.5 days with precipitation
March 1.9"
11.5 days with precipitation
April 2.4"
11.5 days with precipitation
May 2.8"
13.4 days with precipitation
June 3.2"
14.4 days with precipitation
July 1.3"
10.2 days with precipitation
August 1.6"
11.2 days with precipitation
September 1.7"
9.6 days with precipitation
October 1.8"
9.6 days with precipitation
November 1.6"
11.1 days with precipitation
December 1.7"
13.7 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
N/A
50% probability date
Last Spring Freeze
N/A
50% probability date
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
9,955
Higher = more heating needed
Cooling Degree Days
11
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
Nearby Cities
Related Data
PlainEnviro
EPA environmental data — pollution, water quality, and environmental health by location
PlainCarbon
Carbon emissions data — greenhouse gas reporting and facility-level CO2 data
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PlainAirData
EPA air quality data — AQI readings, pollutant levels, and air quality trends
Climate Guides
Climate Insight: Big Sky, MT
The NOAA 1991–2020 climate normals describe Big Sky, Montana as a location with an annual average temperature of 38°F, ranging from a mean daily high of 52°F to a mean daily low of 24°F. July is typically the warmest month of the year, while December is the coldest. These thirty-year averages, computed from station USC00240775, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. Big Sky receives roughly 23.3 inches of precipitation each year, predominantly as rainfall. Growing-season length varies with elevation and microclimate, with the last spring freeze near N/A and the first fall freeze near N/A. For energy use, 9,955 heating degree days and 11 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Big Sky scores 57/100 (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 December-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 Big Sky, MT? ▼
The average annual temperature in Big Sky, Montana is 38°F. The warmest month averages 78°F (25°C) and the coldest averages 9°F (-13°C).
How much rain does Big Sky get? ▼
Big Sky receives 23.3 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Big Sky? ▼
Big Sky has a climate comfort score of 57/100 (Moderate). This score considers temperature mildness, humidity, precipitation, and extreme weather frequency.
When is the growing season in Big Sky? ▼
Growing season data is not available for Big Sky.
How much energy does heating and cooling require in Big Sky? ▼
Big Sky has 9,955 heating degree days and 11 cooling degree days annually. Higher heating degree days indicate greater winter energy demand, while higher cooling degree days indicate greater summer cooling needs.
Where does this Big Sky climate data come from? ▼
All climate data comes from NOAA U.S. Climate Normals v1.0.1, covering the 30-year period from 1991 to 2020. Data is collected from weather station USC00240775. These 30-year averages are the standard reference for typical weather conditions.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00240775. 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
