Climate Comfort Score
39/100
Below Average
NOAA 1991–2020 normals 43°F annual avg Public-domain federal data
- 43°F
- Avg annual temp
- 39/100
- Comfort score
- 12.9"
- Annual precip
- 80d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Ennis
Ennis, Montana averages 43°F a year and scores 39/100 on the comfort index - below average, milder than 4% of U.S. cities.
- 43°F
- annual average temperature (NOAA normal)
- 39/100
- comfort score, milder than 4% of U.S. cities
- 12.9"
- annual precipitation · 45" snow
- 80 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
43°F (6°C)
Avg High
57°F
Avg Low
29°F
Annual Precip
12.9"
Annual Snow
44.7"
Comfort Score
39/100
Below Average
Avg Annual Temperature
43°F
30-year mean (NOAA NCEI)
Annual Precipitation
12.9"
Plus 44.7" of snow
Comfort score vs national 100-point ceiling (Ennis) 39.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Below Average for the Ennis area.
How Ennis compares to every U.S. city
Ennis's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
39 Top 96% higher than 4% 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 Ennis
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Ennis 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 | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 34°F (1°C) | 15°F (-9°C) | 25°F (-4°C) | 0.5" | 6.5" | 28.4 | 0.0 |
| February | 37°F (3°C) | 15°F (-9°C) | 26°F (-3°C) | 0.5" | 7.6" | 25.3 | 0.0 |
| March | 46°F (8°C) | 22°F (-6°C) | 34°F (1°C) | 0.8" | 6.6" | 25.2 | 0.0 |
| April | 55°F (13°C) | 28°F (-2°C) | 41°F (5°C) | 1.5" | 6.0" | 20.4 | 0.0 |
| May | 64°F (18°C) | 35°F (2°C) | 49°F (10°C) | 1.9" | 1.3" | 9.0 | 0.1 |
| June | 73°F (23°C) | 41°F (5°C) | 57°F (14°C) | 2.2" | 0.2" | 1.3 | 0.7 |
| July | 83°F (28°C) | 46°F (8°C) | 64°F (18°C) | 1.2" | 0.0" | 0.1 | 7.1 |
| August | 82°F (28°C) | 44°F (6°C) | 63°F (17°C) | 1.0" | 0.0" | 0.5 | 4.7 |
| September | 72°F (22°C) | 37°F (3°C) | 55°F (13°C) | 1.0" | 0.1" | 6.6 | 0.6 |
| October | 58°F (14°C) | 29°F (-2°C) | 43°F (6°C) | 1.1" | 2.2" | 17.9 | 0.0 |
| November | 43°F (6°C) | 22°F (-6°C) | 32°F (0°C) | 0.7" | 6.9" | 23.1 | 0.0 |
| December | 33°F (1°C) | 15°F (-10°C) | 24°F (-5°C) | 0.5" | 7.3" | 28.1 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 0.5"
Snow: 6.5"
5.3 days with precipitation
February 0.5"
Snow: 7.6"
5.9 days with precipitation
March 0.8"
Snow: 6.6"
7.7 days with precipitation
April 1.5"
Snow: 6.0"
10.7 days with precipitation
May 1.9"
Snow: 1.3"
11.8 days with precipitation
June 2.2"
Snow: 0.2"
11.1 days with precipitation
July 1.2"
8.2 days with precipitation
August 1.0"
6.6 days with precipitation
September 1.0"
Snow: 0.1"
6.6 days with precipitation
October 1.1"
Snow: 2.2"
7.8 days with precipitation
November 0.7"
Snow: 6.9"
6.6 days with precipitation
December 0.5"
Snow: 7.3"
5.9 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
September 4
50% probability date
Last Spring Freeze
June 16
50% probability date
Growing Season
80 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,190
Higher = more heating needed
Cooling Degree Days
102
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
What Ennis's climate means for you
Ennis runs 43°F a year - peaking in July, coldest in December.
- Gardeners get about 80 frost-free days, with the last spring freeze near June 16 - plan the planting calendar around it, not the regional average.
- Energy bills track 8,190 heating and 102 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: Ennis, MT
An annual average temperature of 43°F, ranging from a mean daily high of 57°F to a mean daily low of 29°F is what the NOAA 1991–2020 climate normals report for Ennis, Montana. July is typically the warmest month of the year, while December is the coldest. That baseline comes from station USC00242793 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.
Ennis averages 12.9 inches of precipitation a year, with 44.7 inches typically falling as snow, and that matters as much to daily life here as temperature does. The frost-free season averages 80 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near June 16 and the first fall freeze near September 4. As for energy demand, 8,190 heating degree days and 102 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Ennis scores 39/100 (Below Average), 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 Ennis, MT? ▼
The average annual temperature in Ennis, Montana is 43°F. The warmest month averages 83°F (28°C) and the coldest averages 15°F (-10°C).
How much rain does Ennis get? ▼
Ennis receives 12.9 inches of precipitation annually, including 44.7 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Ennis? ▼
Ennis has a climate comfort score of 39/100 (Below Average), milder than 4% of U.S. cities in the PlainClimate database.
When is the growing season in Ennis? ▼
Ennis has approximately 80 frost-free days per year, with the last spring freeze around June 16 and the first fall freeze around September 4.
How much energy does heating and cooling require in Ennis? ▼
Ennis has 8,190 heating degree days and 102 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 Ennis climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00242793 near Ennis.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00242793. 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.