Climate Comfort Score
83/100
Excellent
NOAA 1991–2020 normals 57°F annual avg Public-domain federal data
Brookport Dam, IL Climate
Average temperature, precipitation, and a comfort score, drawn from NOAA NCEI 1991–2020 normals →
- 57°F
- Avg annual temp
- 83/100
- Comfort score
- 49.1"
- Annual precip
- 204d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Brookport Dam
Brookport Dam, Illinois averages 57°F a year and scores 83/100 on the comfort index - excellent, milder than 85% of U.S. cities.
- 57°F
- yearly average temperature, NOAA normal
- 83/100
- comfort score, milder than 85% of U.S. cities
- 49.1"
- annual precipitation · 3" snow
- 204 days
- frost-free days per growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
57°F (14°C)
Avg High
68°F
Avg Low
47°F
Annual Precip
49.1"
Annual Snow
3.1"
Comfort Score
83/100
Excellent
Avg Annual Temperature
57°F
30-year mean (NOAA NCEI)
Annual Precipitation
49.1"
Plus 3.1" of snow
Comfort score vs national 100-point ceiling (Brookport Dam) 83.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Excellent for the Brookport Dam area.
How Brookport Dam compares to every U.S. city
Brookport Dam's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
83 Top 15% higher than 85% 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 Brookport Dam
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Brookport Dam captures average conditions across the spread shown, the most recent decade is 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 | 43°F (6°C) | 25°F (-4°C) | 34°F (1°C) | 3.7" | 0.7" | 22.8 | 0.0 |
| February | 48°F (9°C) | 28°F (-2°C) | 38°F (3°C) | 3.8" | 1.8" | 17.5 | 0.0 |
| March | 58°F (14°C) | 36°F (2°C) | 47°F (8°C) | 4.6" | 0.1" | 11.2 | 0.0 |
| April | 69°F (21°C) | 46°F (8°C) | 58°F (14°C) | 5.1" | 0.0" | 1.9 | 0.0 |
| May | 77°F (25°C) | 56°F (13°C) | 67°F (19°C) | 4.8" | 0.0" | 0.0 | 0.7 |
| June | 85°F (30°C) | 65°F (18°C) | 75°F (24°C) | 4.7" | 0.0" | 0.0 | 8.4 |
| July | 89°F (31°C) | 68°F (20°C) | 78°F (26°C) | 3.9" | 0.0" | 0.0 | 14.7 |
| August | 88°F (31°C) | 66°F (19°C) | 77°F (25°C) | 2.9" | 0.0" | 0.0 | 12.7 |
| September | 82°F (28°C) | 59°F (15°C) | 70°F (21°C) | 3.5" | 0.0" | 0.0 | 4.9 |
| October | 71°F (22°C) | 47°F (8°C) | 59°F (15°C) | 4.1" | 0.0" | 1.3 | 0.1 |
| November | 57°F (14°C) | 36°F (2°C) | 47°F (8°C) | 4.0" | 0.0" | 10.1 | 0.0 |
| December | 47°F (8°C) | 29°F (-2°C) | 38°F (3°C) | 4.0" | 0.5" | 18.4 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 3.7"
Snow: 0.7"
8.5 days with precipitation
February 3.8"
Snow: 1.8"
8.3 days with precipitation
March 4.6"
Snow: 0.1"
10.2 days with precipitation
April 5.1"
10.8 days with precipitation
May 4.8"
10.7 days with precipitation
June 4.7"
8.2 days with precipitation
July 3.9"
7.9 days with precipitation
August 2.9"
6.3 days with precipitation
September 3.5"
6.8 days with precipitation
October 4.1"
7.3 days with precipitation
November 4.0"
8.4 days with precipitation
December 4.0"
Snow: 0.5"
9.7 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 27
50% probability date
Last Spring Freeze
April 6
50% probability date
Growing Season
204 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,267
Higher = more heating needed
Cooling Degree Days
1,481
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Brookport Dam's climate means for you
Brookport Dam runs 57°F a year - peaking in July, coldest in January.
- Gardeners get about 204 frost-free days, with the last spring freeze near April 6 - plan the planting calendar around it, not the regional average.
- Energy bills track 4,267 heating and 1,481 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: Brookport Dam, IL
An annual average temperature of 57°F, ranging from a mean daily high of 68°F to a mean daily low of 47°F is what the NOAA 1991–2020 climate normals report for Brookport Dam, Illinois. July is typically the warmest month of the year, while January is the coldest. That baseline comes from station USC00110993 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. Brookport Dam sees about 49.1 inches of precipitation a year, with 3.1 inches typically falling as snow. The frost-free season averages 204 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 6 and the first fall freeze near October 27. On the energy side, 4,267 heating degree days and 1,481 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Brookport Dam scores 83/100 (Excellent), 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 Brookport Dam, IL? ▼
The average annual temperature in Brookport Dam, Illinois is 57°F. The warmest month averages 89°F (31°C) and the coldest averages 25°F (-4°C).
How much rain does Brookport Dam get? ▼
Brookport Dam receives 49.1 inches of precipitation annually, including 3.1 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Brookport Dam? ▼
Brookport Dam has a climate comfort score of 83/100 (Excellent), milder than 85% of U.S. cities in the PlainClimate database.
When is the growing season in Brookport Dam? ▼
Brookport Dam has approximately 204 frost-free days per year, with the last spring freeze around April 6 and the first fall freeze around October 27.
How much energy does heating and cooling require in Brookport Dam? ▼
Brookport Dam has 4,267 heating degree days and 1,481 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 Brookport Dam climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00110993 near Brookport Dam.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00110993. 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.