Climate Comfort Score
47/100
Moderate
NOAA 1991–2020 normals 39°F annual avg 2 stations
Dillon, MT Climate
Pulled from NOAA NCEI 1991–2020 normals →: average temperature, precipitation, and comfort score
- 39°F
- Avg annual temp
- 47/100
- Comfort score
- 10.1"
- Annual precip
30-year climate normals from 2 weather stations (1991-2020).
The climate verdict for Dillon
Dillon, Montana averages 39°F a year and scores 47/100 on the comfort index - moderate, milder than 17% of U.S. cities.
- 39°F
- average temperature, NOAA 1991-2020 normal
- 47/100
- comfort score, milder than 17% of U.S. cities
- 10.1"
- annual precipitation
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
39°F (4°C)
Avg High
53°F
Avg Low
25°F
Annual Precip
10.1"
Comfort Score
47/100
Moderate
Avg Annual Temperature
39°F
30-year mean (NOAA NCEI)
Annual Precipitation
10.1"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Dillon) 47.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Dillon area.
How Dillon compares to every U.S. city
Dillon's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
47 Top 83% higher than 17% 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 Dillon
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Dillon 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 | 28°F (-2°C) | 8°F (-13°C) | 18°F (-8°C) | 0.3" | 30.9 | 0.0 |
| February | 32°F (0°C) | 9°F (-13°C) | 20°F (-6°C) | 0.6" | 27.5 | 0.0 |
| March | 41°F (5°C) | 18°F (-8°C) | 29°F (-1°C) | 0.6" | 29.8 | 0.0 |
| April | 50°F (10°C) | 26°F (-4°C) | 38°F (3°C) | 1.0" | 26.5 | 0.0 |
| May | 60°F (16°C) | 33°F (1°C) | 47°F (8°C) | 1.6" | 14.5 | 0.0 |
| June | 69°F (21°C) | 39°F (4°C) | 54°F (12°C) | 1.8" | 3.5 | 0.3 |
| July | 81°F (27°C) | 44°F (7°C) | 62°F (17°C) | 0.6" | 0.2 | 2.0 |
| August | 79°F (26°C) | 42°F (6°C) | 61°F (16°C) | 0.7" | 0.8 | 1.5 |
| September | 69°F (20°C) | 35°F (2°C) | 52°F (11°C) | 0.8" | 11.2 | 0.2 |
| October | 53°F (12°C) | 25°F (-4°C) | 39°F (4°C) | 0.9" | 25.1 | 0.0 |
| November | 39°F (4°C) | 15°F (-10°C) | 27°F (-3°C) | 0.5" | 28.6 | 0.0 |
| December | 28°F (-2°C) | 7°F (-14°C) | 18°F (-8°C) | 0.7" | 30.9 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 0.3"
7.8 days with precipitation
February 0.6"
9.7 days with precipitation
March 0.6"
9.3 days with precipitation
April 1.0"
9.9 days with precipitation
May 1.6"
11.5 days with precipitation
June 1.8"
10.4 days with precipitation
July 0.6"
5.9 days with precipitation
August 0.7"
6.1 days with precipitation
September 0.8"
6.2 days with precipitation
October 0.9"
7.4 days with precipitation
November 0.5"
7.7 days with precipitation
December 0.7"
10.3 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
9,590
Higher = more heating needed
Cooling Degree Days
35
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
What Dillon's climate means for you
Dillon runs 39°F a year - peaking in July, coldest in December.
- Energy bills track 9,590 heating and 35 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: Dillon, MT
Based on 2 weather stations feeding NOAA's 1991–2020 climate normals, Dillon, Montana averages 39°F a year, ranging from a mean daily high of 53°F to a mean daily low of 25°F. July is typically the warmest month of the year, while December is the coldest. Because these figures are thirty-year averages rather than any single year's readings, they describe the typical month, not a forecast for it.
Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Dillon sees about 10.1 inches of precipitation a year, predominantly as rainfall. Growing-season length varies with elevation and microclimate. On the energy side, 9,590 heating degree days and 35 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Dillon scores 47/100 (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 Dillon, MT? ▼
The average annual temperature in Dillon, Montana is 39°F. The warmest month averages 81°F (27°C) and the coldest averages 7°F (-14°C).
How much rain does Dillon get? ▼
Dillon receives 10.1 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Dillon? ▼
Dillon has a climate comfort score of 47/100 (Moderate), milder than 17% of U.S. cities in the PlainClimate database.
When is the growing season in Dillon? ▼
Growing season data is not available for Dillon.
How much energy does heating and cooling require in Dillon? ▼
Dillon has 9,590 heating degree days and 35 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 Dillon climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from 2 weather stations near Dillon.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00004137. 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.