Climate Comfort Score
49/100
Moderate
NOAA 1991–2020 normals 47°F annual avg Public-domain federal data
Eureka RS, MT Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 47°F
- Avg annual temp
- 49/100
- Comfort score
- 15.0"
- Annual precip
- 139d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Eureka RS
Eureka RS, Montana averages 47°F a year and scores 49/100 on the comfort index - moderate, milder than 18% of U.S. cities.
- 47°F
- yearly average temperature, NOAA normal
- 49/100
- comfort score, milder than 18% of U.S. cities
- 15.0"
- annual precipitation · 35" snow
- 139 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
47°F (8°C)
Avg High
59°F
Avg Low
35°F
Annual Precip
15.0"
Annual Snow
35.1"
Comfort Score
49/100
Moderate
Avg Annual Temperature
47°F
30-year mean (NOAA NCEI)
Annual Precipitation
15.0"
Plus 35.1" of snow
Comfort score vs national 100-point ceiling (Eureka RS) 49.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Eureka RS area.
How Eureka RS compares to every U.S. city
Eureka RS's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
49 Top 82% higher than 18% 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 Eureka RS
MethodologyEureka RS'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 | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 32°F (0°C) | 19°F (-7°C) | 26°F (-3°C) | 0.9" | 8.5" | 27.0 | 0.0 |
| February | 39°F (4°C) | 21°F (-6°C) | 30°F (-1°C) | 0.7" | 5.9" | 24.3 | 0.0 |
| March | 49°F (10°C) | 28°F (-2°C) | 38°F (3°C) | 0.9" | 3.7" | 22.0 | 0.0 |
| April | 60°F (15°C) | 34°F (1°C) | 47°F (8°C) | 1.0" | 1.0" | 13.5 | 0.0 |
| May | 70°F (21°C) | 42°F (5°C) | 56°F (13°C) | 1.8" | 0.2" | 3.7 | 0.3 |
| June | 77°F (25°C) | 49°F (9°C) | 63°F (17°C) | 2.5" | 0.0" | 0.1 | 2.2 |
| July | 87°F (30°C) | 53°F (12°C) | 70°F (21°C) | 1.1" | 0.0" | 0.0 | 11.4 |
| August | 86°F (30°C) | 51°F (11°C) | 69°F (20°C) | 1.1" | 0.0" | 0.0 | 11.2 |
| September | 75°F (24°C) | 44°F (7°C) | 59°F (15°C) | 1.3" | 0.0" | 2.3 | 1.3 |
| October | 57°F (14°C) | 35°F (2°C) | 46°F (8°C) | 1.2" | 0.6" | 12.8 | 0.0 |
| November | 41°F (5°C) | 27°F (-3°C) | 34°F (1°C) | 1.2" | 5.0" | 20.0 | 0.0 |
| December | 31°F (0°C) | 21°F (-6°C) | 26°F (-3°C) | 1.2" | 10.2" | 27.1 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 0.9"
Snow: 8.5"
10.5 days with precipitation
February 0.7"
Snow: 5.9"
7.8 days with precipitation
March 0.9"
Snow: 3.7"
8.8 days with precipitation
April 1.0"
Snow: 1.0"
8.5 days with precipitation
May 1.8"
Snow: 0.2"
9.9 days with precipitation
June 2.5"
10.4 days with precipitation
July 1.1"
6.6 days with precipitation
August 1.1"
5.2 days with precipitation
September 1.3"
6.7 days with precipitation
October 1.2"
Snow: 0.6"
8.6 days with precipitation
November 1.2"
Snow: 5.0"
9.3 days with precipitation
December 1.2"
Snow: 10.2"
10.2 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
September 27
50% probability date
Last Spring Freeze
May 11
50% probability date
Growing Season
139 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,948
Higher = more heating needed
Cooling Degree Days
400
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Eureka RS's climate means for you
Eureka RS runs 47°F a year - peaking in July, coldest in January.
- Gardeners get about 139 frost-free days, with the last spring freeze near May 11 - plan the planting calendar around it, not the regional average.
- Energy bills track 6,948 heating and 400 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: Eureka RS, MT
An annual average temperature of 47°F, ranging from a mean daily high of 59°F to a mean daily low of 35°F is what the NOAA 1991–2020 climate normals report for Eureka RS, Montana. July is typically the warmest month of the year, while January is the coldest. That baseline comes from station USC00242827 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.
Beyond temperature, Eureka RS averages 15.0 inches of precipitation annually, with 35.1 inches typically falling as snow - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 139 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 11 and the first fall freeze near September 27. Turning to energy use, 6,948 heating degree days and 400 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Eureka RS scores 49/100 (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 Eureka RS, MT? ▼
The average annual temperature in Eureka RS, Montana is 47°F. The warmest month averages 87°F (30°C) and the coldest averages 19°F (-7°C).
How much rain does Eureka RS get? ▼
Eureka RS receives 15.0 inches of precipitation annually, including 35.1 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Eureka RS? ▼
Eureka RS has a climate comfort score of 49/100 (Moderate), milder than 18% of U.S. cities in the PlainClimate database.
When is the growing season in Eureka RS? ▼
Eureka RS has approximately 139 frost-free days per year, with the last spring freeze around May 11 and the first fall freeze around September 27.
How much energy does heating and cooling require in Eureka RS? ▼
Eureka RS has 6,948 heating degree days and 400 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 Eureka RS climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00242827 near Eureka RS.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00242827. 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.