Climate Comfort Score
59/100
Moderate
NOAA 1991–2020 normals 49°F annual avg Public-domain federal data
MT Carroll, IL Climate
Average temperature, precipitation, and a comfort score, drawn from NOAA NCEI 1991–2020 normals →
- 49°F
- Avg annual temp
- 59/100
- Comfort score
- 40.3"
- Annual precip
- 158d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for MT Carroll
MT Carroll, Illinois averages 49°F a year and scores 59/100 on the comfort index - moderate, milder than 39% of U.S. cities.
- 49°F
- annual average temperature (NOAA normal)
- 59/100
- comfort score, milder than 39% of U.S. cities
- 40.3"
- annual precipitation · 33" snow
- 158 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
49°F (9°C)
Avg High
60°F
Avg Low
37°F
Annual Precip
40.3"
Annual Snow
33.4"
Comfort Score
59/100
Moderate
Avg Annual Temperature
49°F
30-year mean (NOAA NCEI)
Annual Precipitation
40.3"
Plus 33.4" of snow
Comfort score vs national 100-point ceiling (MT Carroll) 59.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the MT Carroll area.
How MT Carroll compares to every U.S. city
MT Carroll's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
59 Top 61% higher than 39% 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 MT Carroll
MethodologySince 1900, U.S. land temperatures have tracked (and diverged from) the global mean - the chart below shows how. MT Carroll'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 | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 31°F (-1°C) | 11°F (-12°C) | 21°F (-6°C) | 1.7" | 10.2" | 30.0 | 0.0 |
| February | 35°F (2°C) | 14°F (-10°C) | 25°F (-4°C) | 1.8" | 7.9" | 26.6 | 0.0 |
| March | 48°F (9°C) | 26°F (-4°C) | 37°F (3°C) | 2.5" | 3.6" | 23.6 | 0.0 |
| April | 61°F (16°C) | 36°F (2°C) | 48°F (9°C) | 3.9" | 0.8" | 11.3 | 0.0 |
| May | 72°F (22°C) | 47°F (8°C) | 60°F (15°C) | 4.6" | 0.0" | 1.6 | 1.0 |
| June | 82°F (28°C) | 57°F (14°C) | 69°F (21°C) | 5.5" | 0.0" | 0.0 | 4.8 |
| July | 85°F (29°C) | 60°F (16°C) | 73°F (23°C) | 4.9" | 0.0" | 0.0 | 6.8 |
| August | 83°F (29°C) | 58°F (15°C) | 71°F (22°C) | 3.9" | 0.0" | 0.0 | 4.3 |
| September | 77°F (25°C) | 50°F (10°C) | 63°F (17°C) | 3.7" | 0.0" | 1.0 | 2.0 |
| October | 64°F (18°C) | 38°F (3°C) | 51°F (11°C) | 3.0" | 0.4" | 10.4 | 0.1 |
| November | 49°F (9°C) | 27°F (-3°C) | 38°F (3°C) | 2.6" | 1.7" | 21.2 | 0.0 |
| December | 36°F (2°C) | 17°F (-8°C) | 26°F (-3°C) | 2.2" | 8.8" | 28.8 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 1.7"
Snow: 10.2"
8.9 days with precipitation
February 1.8"
Snow: 7.9"
7.6 days with precipitation
March 2.5"
Snow: 3.6"
8.9 days with precipitation
April 3.9"
Snow: 0.8"
11.4 days with precipitation
May 4.6"
12.7 days with precipitation
June 5.5"
11.6 days with precipitation
July 4.9"
8.9 days with precipitation
August 3.9"
8.7 days with precipitation
September 3.7"
8.6 days with precipitation
October 3.0"
Snow: 0.4"
8.7 days with precipitation
November 2.6"
Snow: 1.7"
8.1 days with precipitation
December 2.2"
Snow: 8.8"
9.2 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 7
50% probability date
Last Spring Freeze
May 2
50% probability date
Growing Season
158 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,733
Higher = more heating needed
Cooling Degree Days
746
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What MT Carroll's climate means for you
MT Carroll runs 49°F a year - peaking in July, coldest in January.
- Gardeners get about 158 frost-free days, with the last spring freeze near May 2 - plan the planting calendar around it, not the regional average.
- Energy bills track 6,733 heating and 746 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: MT Carroll, IL
The NOAA 1991–2020 climate normals describe MT Carroll, Illinois as a location with an annual average temperature of 49°F, ranging from a mean daily high of 60°F to a mean daily low of 37°F. July is typically the warmest month of the year, while January is the coldest. These thirty-year averages, computed from station USC00115901, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
MT Carroll averages 40.3 inches of precipitation a year, with 33.4 inches typically falling as snow, and that matters as much to daily life here as temperature does. The frost-free season averages 158 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 2 and the first fall freeze near October 7. As for energy demand, 6,733 heating degree days and 746 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, MT Carroll scores 59/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above are the practical planning tool: mild highs and lows land in the shoulder seasons, July-driven heat peaks in summer, and January-driven cold sets in over deep winter. These are thirty-year averages, not a forecast - any single year can run warmer, wetter, drier, or cooler than the normal.
Frequently Asked Questions
What is the average temperature in MT Carroll, IL? ▼
The average annual temperature in MT Carroll, Illinois is 49°F. The warmest month averages 85°F (29°C) and the coldest averages 11°F (-12°C).
How much rain does MT Carroll get? ▼
MT Carroll receives 40.3 inches of precipitation annually, including 33.4 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for MT Carroll? ▼
MT Carroll has a climate comfort score of 59/100 (Moderate), milder than 39% of U.S. cities in the PlainClimate database.
When is the growing season in MT Carroll? ▼
MT Carroll has approximately 158 frost-free days per year, with the last spring freeze around May 2 and the first fall freeze around October 7.
How much energy does heating and cooling require in MT Carroll? ▼
MT Carroll has 6,733 heating degree days and 746 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 MT Carroll climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00115901 near MT Carroll.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00115901. 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.