Climate Comfort Score
54/100
Moderate
NOAA 1991–2020 normals 48°F annual avg Public-domain federal data
Saint Ignatius, MT Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 48°F
- Avg annual temp
- 54/100
- Comfort score
- 16.7"
- Annual precip
- 143d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Saint Ignatius
Saint Ignatius, Montana averages 48°F a year and scores 54/100 on the comfort index - moderate, milder than 27% of U.S. cities.
- 48°F
- average temperature, NOAA 1991-2020 normal
- 54/100
- comfort score, milder than 27% of U.S. cities
- 16.7"
- yearly precipitation total
- 143 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
48°F (9°C)
Avg High
60°F
Avg Low
36°F
Annual Precip
16.7"
Comfort Score
54/100
Moderate
Avg Annual Temperature
48°F
30-year mean (NOAA NCEI)
Annual Precipitation
16.7"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Saint Ignatius) 54.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Saint Ignatius area.
How Saint Ignatius compares to every U.S. city
Saint Ignatius's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
54 Top 73% higher than 27% 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 Saint Ignatius
MethodologySince 1900, U.S. land temperatures have tracked (and diverged from) the global mean - the chart below shows how. Saint Ignatius's current NOAA 1991-2020 normal sits within that longer spread, and the most recent decade runs 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 | 37°F (3°C) | 23°F (-5°C) | 30°F (-1°C) | 0.9" | 26.4 | 0.0 |
| February | 40°F (4°C) | 22°F (-5°C) | 31°F (0°C) | 1.1" | 23.8 | 0.0 |
| March | 51°F (10°C) | 28°F (-2°C) | 39°F (4°C) | 0.9" | 23.2 | 0.0 |
| April | 59°F (15°C) | 34°F (1°C) | 47°F (8°C) | 1.8" | 12.5 | 0.0 |
| May | 69°F (20°C) | 41°F (5°C) | 55°F (13°C) | 2.3" | 4.4 | 0.2 |
| June | 75°F (24°C) | 47°F (8°C) | 61°F (16°C) | 2.6" | 0.3 | 1.2 |
| July | 86°F (30°C) | 52°F (11°C) | 69°F (21°C) | 1.0" | 0.0 | 9.7 |
| August | 86°F (30°C) | 51°F (10°C) | 68°F (20°C) | 1.2" | 0.0 | 8.3 |
| September | 75°F (24°C) | 44°F (7°C) | 59°F (15°C) | 1.5" | 1.5 | 1.0 |
| October | 59°F (15°C) | 35°F (1°C) | 47°F (8°C) | 1.3" | 12.5 | 0.0 |
| November | 45°F (7°C) | 28°F (-2°C) | 36°F (2°C) | 1.1" | 21.6 | 0.0 |
| December | 37°F (3°C) | 23°F (-5°C) | 30°F (-1°C) | 0.9" | 26.2 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 0.9"
9.0 days with precipitation
February 1.1"
7.1 days with precipitation
March 0.9"
7.7 days with precipitation
April 1.8"
8.8 days with precipitation
May 2.3"
10.8 days with precipitation
June 2.6"
11.1 days with precipitation
July 1.0"
5.7 days with precipitation
August 1.2"
5.5 days with precipitation
September 1.5"
6.8 days with precipitation
October 1.3"
8.4 days with precipitation
November 1.1"
9.6 days with precipitation
December 0.9"
8.6 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 2
50% probability date
Last Spring Freeze
May 12
50% probability date
Growing Season
143 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,655
Higher = more heating needed
Cooling Degree Days
361
Higher = more cooling needed
Warmest Month
July
Coldest Month
December
What Saint Ignatius's climate means for you
Saint Ignatius runs 48°F a year - peaking in July, coldest in December.
- Gardeners get about 143 frost-free days, with the last spring freeze near May 12 - plan the planting calendar around it, not the regional average.
- Energy bills track 6,655 heating and 361 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: Saint Ignatius, MT
In Saint Ignatius, Montana, the NOAA 1991–2020 climate normals put the annual average temperature at 48°F, ranging from a mean daily high of 60°F to a mean daily low of 36°F. July is typically the warmest month of the year, while December is the coldest. As thirty-year averages computed from station USC00247286, these numbers smooth out year-to-year noise into a working baseline for a typical month.
Anyone planning to live, garden, or travel in Saint Ignatius should weigh precipitation alongside temperature: the annual average runs 16.7 inches, predominantly as rainfall. The frost-free season averages 143 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 12 and the first fall freeze near October 2. And on the energy front, 6,655 heating degree days and 361 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Saint Ignatius scores 54/100 (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 Saint Ignatius, MT? ▼
The average annual temperature in Saint Ignatius, Montana is 48°F. The warmest month averages 86°F (30°C) and the coldest averages 22°F (-5°C).
How much rain does Saint Ignatius get? ▼
Saint Ignatius receives 16.7 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Saint Ignatius? ▼
Saint Ignatius has a climate comfort score of 54/100 (Moderate), milder than 27% of U.S. cities in the PlainClimate database.
When is the growing season in Saint Ignatius? ▼
Saint Ignatius has approximately 143 frost-free days per year, with the last spring freeze around May 12 and the first fall freeze around October 2.
How much energy does heating and cooling require in Saint Ignatius? ▼
Saint Ignatius has 6,655 heating degree days and 361 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 Saint Ignatius climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00247286 near Saint Ignatius.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00247286. 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.