Climate Comfort Score
44/100
Moderate
NOAA 1991–2020 normals 43°F annual avg Public-domain federal data
Lewistown Muni, MT Climate
Explore average temperature, rainfall, and comfort score sourced from NOAA NCEI's 1991–2020 climate normals →
- 43°F
- Avg annual temp
- 44/100
- Comfort score
- 17.2"
- Annual precip
- 121d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Lewistown Muni
Lewistown Muni, Montana averages 43°F a year and scores 44/100 on the comfort index - moderate, milder than 8% of U.S. cities.
- 43°F
- yearly average temperature, NOAA normal
- 44/100
- comfort score, milder than 8% of U.S. cities
- 17.2"
- precipitation, annual total
- 121 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
56°F
Avg Low
31°F
Annual Precip
17.2"
Comfort Score
44/100
Moderate
Avg Annual Temperature
43°F
30-year mean (NOAA NCEI)
Annual Precipitation
17.2"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Lewistown Muni) 44.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Lewistown Muni area.
How Lewistown Muni compares to every U.S. city
Lewistown Muni'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 Lewistown Muni
MethodologyLewistown Muni's NOAA 1991-2020 normal sits inside a longer story: U.S. land temperatures have been tracking (and drifting from) the global mean since 1900, and the chart below shows that spread, with the most recent decade running 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 | 34°F (1°C) | 13°F (-11°C) | 24°F (-5°C) | 0.6" | 29.0 | 0.0 |
| February | 35°F (2°C) | 14°F (-10°C) | 25°F (-4°C) | 0.5" | 26.1 | 0.0 |
| March | 44°F (7°C) | 21°F (-6°C) | 33°F (0°C) | 0.9" | 26.7 | 0.0 |
| April | 53°F (12°C) | 29°F (-2°C) | 41°F (5°C) | 1.7" | 20.5 | 0.0 |
| May | 63°F (17°C) | 37°F (3°C) | 50°F (10°C) | 2.9" | 7.8 | 0.0 |
| June | 71°F (22°C) | 45°F (7°C) | 58°F (14°C) | 3.4" | 0.3 | 0.5 |
| July | 82°F (28°C) | 51°F (10°C) | 66°F (19°C) | 1.8" | 0.0 | 5.7 |
| August | 81°F (27°C) | 50°F (10°C) | 65°F (19°C) | 1.7" | 0.0 | 5.0 |
| September | 70°F (21°C) | 42°F (5°C) | 56°F (13°C) | 1.4" | 2.7 | 1.3 |
| October | 56°F (13°C) | 31°F (-1°C) | 43°F (6°C) | 1.3" | 16.8 | 0.0 |
| November | 43°F (6°C) | 21°F (-6°C) | 32°F (0°C) | 0.7" | 25.2 | 0.0 |
| December | 35°F (2°C) | 14°F (-10°C) | 24°F (-4°C) | 0.5" | 29.3 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 0.6"
7.7 days with precipitation
February 0.5"
8.2 days with precipitation
March 0.9"
9.1 days with precipitation
April 1.7"
11.7 days with precipitation
May 2.9"
13.7 days with precipitation
June 3.4"
13.6 days with precipitation
July 1.8"
10.3 days with precipitation
August 1.7"
9.0 days with precipitation
September 1.4"
8.5 days with precipitation
October 1.3"
9.4 days with precipitation
November 0.7"
7.4 days with precipitation
December 0.5"
7.3 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
September 21
50% probability date
Last Spring Freeze
May 23
50% probability date
Growing Season
121 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,177
Higher = more heating needed
Cooling Degree Days
229
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 66% | 10.0 | N/A | N/A |
| February | 65% | 9.3 | N/A | N/A |
| March | 59% | 9.7 | N/A | N/A |
| April | 56% | 9.8 | 32% | 21% |
| May | 61% | 9.0 | N/A | N/A |
| June | 56% | 7.7 | 67% | 14% |
| July | 47% | 7.6 | 70% | 3% |
| August | 47% | 7.6 | 69% | 10% |
| September | 54% | 8.4 | N/A | N/A |
| October | 57% | 10.1 | N/A | N/A |
| November | 61% | 10.3 | N/A | N/A |
| December | 65% | 9.8 | N/A | N/A |
What Lewistown Muni's climate means for you
Lewistown Muni runs 43°F a year - peaking in July, coldest in January.
- Gardeners get about 121 frost-free days, with the last spring freeze near May 23 - plan the planting calendar around it, not the regional average.
- Energy bills track 8,177 heating and 229 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: Lewistown Muni, MT
Lewistown Muni, Montana runs an annual average of 43°F, ranging from a mean daily high of 56°F to a mean daily low of 31°F, per NOAA's 1991–2020 climate normals. July is typically the warmest month of the year, while January is the coldest. Drawn from station USW00024036, these thirty-year averages smooth out year-to-year swings into a baseline for what a typical month looks like here.
Anyone planning to live, garden, or travel in Lewistown Muni should weigh precipitation alongside temperature: the annual average runs 17.2 inches, predominantly as rainfall. The frost-free season averages 121 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 23 and the first fall freeze near September 21. And on the energy front, 8,177 heating degree days and 229 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Lewistown Muni scores 44/100 (Moderate), 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 January-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 Lewistown Muni, MT? ▼
The average annual temperature in Lewistown Muni, Montana is 43°F. The warmest month averages 82°F (28°C) and the coldest averages 13°F (-11°C).
How much rain does Lewistown Muni get? ▼
Lewistown Muni receives 17.2 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Lewistown Muni? ▼
Lewistown Muni 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 Lewistown Muni? ▼
Lewistown Muni has approximately 121 frost-free days per year, with the last spring freeze around May 23 and the first fall freeze around September 21.
How much energy does heating and cooling require in Lewistown Muni? ▼
Lewistown Muni has 8,177 heating degree days and 229 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 Lewistown Muni climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USW00024036 near Lewistown Muni.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00024036. 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.