Climate Comfort Score
57/100
Moderate
NOAA 1991–2020 normals 40°F annual avg Public-domain federal data
- 40°F
- Avg annual temp
- 57/100
- Comfort score
- 20.3"
- Annual precip
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Olney
Olney, Montana averages 40°F a year and scores 57/100 on the comfort index - moderate, milder than 37% of U.S. cities.
- 40°F
- annual average temperature (NOAA normal)
- 57/100
- comfort score, milder than 37% of U.S. cities
- 20.3"
- yearly precipitation total
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
40°F (4°C)
Avg High
53°F
Avg Low
27°F
Annual Precip
20.3"
Comfort Score
57/100
Moderate
Avg Annual Temperature
40°F
30-year mean (NOAA NCEI)
Annual Precipitation
20.3"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Olney) 57.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Olney area.
How Olney compares to every U.S. city
Olney's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
57 Top 63% higher than 37% 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 Olney
MethodologyZooming out from Olney's own normal, the chart below shows how the U.S. land temperature anomaly has tracked the global mean since 1900 - the most recent decade sits warmer than the 30-year mean shown here.
- 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) | 12°F (-11°C) | 20°F (-7°C) | 2.0" | 30.9 | 0.0 |
| February | 34°F (1°C) | 12°F (-11°C) | 23°F (-5°C) | 1.3" | 27.7 | 0.0 |
| March | 43°F (6°C) | 19°F (-7°C) | 31°F (-1°C) | 1.3" | 30.5 | 0.0 |
| April | 53°F (12°C) | 26°F (-3°C) | 39°F (4°C) | 1.2" | 25.7 | 0.0 |
| May | 63°F (17°C) | 34°F (1°C) | 49°F (9°C) | 2.1" | 14.3 | 0.1 |
| June | 69°F (21°C) | 41°F (5°C) | 55°F (13°C) | 3.0" | 3.4 | 0.5 |
| July | 80°F (27°C) | 43°F (6°C) | 62°F (16°C) | 1.3" | 0.5 | 4.2 |
| August | 80°F (26°C) | 41°F (5°C) | 60°F (16°C) | 1.1" | 2.6 | 3.9 |
| September | 69°F (20°C) | 33°F (1°C) | 51°F (11°C) | 1.2" | 14.5 | 0.3 |
| October | 52°F (11°C) | 25°F (-4°C) | 39°F (4°C) | 1.8" | 24.3 | 0.0 |
| November | 36°F (2°C) | 19°F (-7°C) | 28°F (-2°C) | 1.9" | 28.3 | 0.0 |
| December | 27°F (-3°C) | 13°F (-10°C) | 20°F (-7°C) | 2.0" | 31.0 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 2.0"
10.4 days with precipitation
February 1.3"
7.0 days with precipitation
March 1.3"
8.4 days with precipitation
April 1.2"
7.3 days with precipitation
May 2.1"
10.5 days with precipitation
June 3.0"
12.7 days with precipitation
July 1.3"
6.7 days with precipitation
August 1.1"
5.3 days with precipitation
September 1.2"
7.1 days with precipitation
October 1.8"
9.3 days with precipitation
November 1.9"
10.4 days with precipitation
December 2.0"
10.4 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
9,273
Higher = more heating needed
Cooling Degree Days
54
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Olney's climate means for you
Olney runs 40°F a year - peaking in July, coldest in January.
- Energy bills track 9,273 heating and 54 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: Olney, MT
An annual average temperature of 40°F, ranging from a mean daily high of 53°F to a mean daily low of 27°F is what the NOAA 1991–2020 climate normals report for Olney, Montana. July is typically the warmest month of the year, while January is the coldest. That baseline comes from station USC00246218 and thirty years of averaging, so it reflects a typical month rather than any one year's swings.
Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Olney sees about 20.3 inches of precipitation a year, predominantly as rainfall. Growing-season length varies with elevation and microclimate. On the energy side, 9,273 heating degree days and 54 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Olney scores 57/100 (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 January-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 Olney, MT? ▼
The average annual temperature in Olney, Montana is 40°F. The warmest month averages 80°F (27°C) and the coldest averages 12°F (-11°C).
How much rain does Olney get? ▼
Olney receives 20.3 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Olney? ▼
Olney has a climate comfort score of 57/100 (Moderate), milder than 37% of U.S. cities in the PlainClimate database.
When is the growing season in Olney? ▼
Growing season data is not available for Olney.
How much energy does heating and cooling require in Olney? ▼
Olney has 9,273 heating degree days and 54 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 Olney climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00246218 near Olney.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00246218. 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.