Climate Comfort Score
68/100
Good
NOAA 1991–2020 normals 50°F annual avg Public-domain federal data
Joliet Brandon RD Dam, IL Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 50°F
- Avg annual temp
- 68/100
- Comfort score
- 38.0"
- Annual precip
- 189d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Joliet Brandon RD Dam
Joliet Brandon RD Dam, Illinois averages 50°F a year and scores 68/100 on the comfort index - good, milder than 58% of U.S. cities.
- 50°F
- yearly average temperature, NOAA normal
- 68/100
- comfort score, milder than 58% of U.S. cities
- 38.0"
- annual precipitation · 17" snow
- 189 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
50°F (10°C)
Avg High
60°F
Avg Low
41°F
Annual Precip
38.0"
Annual Snow
16.9"
Comfort Score
68/100
Good
Avg Annual Temperature
50°F
30-year mean (NOAA NCEI)
Annual Precipitation
38.0"
Plus 16.9" of snow
Comfort score vs national 100-point ceiling (Joliet Brandon RD Dam) 68.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Good for the Joliet Brandon RD Dam area.
How Joliet Brandon RD Dam compares to every U.S. city
Joliet Brandon RD Dam's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
68 Top 42% higher than 58% 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 Joliet Brandon RD Dam
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Joliet Brandon RD 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 | 31°F (0°C) | 17°F (-9°C) | 24°F (-5°C) | 2.0" | 5.0" | 28.1 | 0.0 |
| February | 35°F (2°C) | 20°F (-7°C) | 28°F (-2°C) | 1.8" | 6.2" | 24.9 | 0.0 |
| March | 47°F (8°C) | 29°F (-2°C) | 38°F (3°C) | 2.3" | 2.1" | 21.1 | 0.0 |
| April | 60°F (16°C) | 39°F (4°C) | 49°F (10°C) | 3.9" | 0.1" | 6.3 | 0.0 |
| May | 71°F (22°C) | 49°F (10°C) | 60°F (16°C) | 4.5" | 0.0" | 0.1 | 0.8 |
| June | 80°F (27°C) | 60°F (16°C) | 70°F (21°C) | 4.3" | 0.0" | 0.0 | 3.7 |
| July | 84°F (29°C) | 64°F (18°C) | 74°F (23°C) | 4.5" | 0.0" | 0.0 | 5.5 |
| August | 82°F (28°C) | 63°F (17°C) | 72°F (22°C) | 4.0" | 0.0" | 0.0 | 3.0 |
| September | 76°F (25°C) | 55°F (13°C) | 66°F (19°C) | 3.2" | 0.0" | 0.0 | 1.9 |
| October | 63°F (17°C) | 43°F (6°C) | 53°F (12°C) | 3.1" | 0.0" | 3.2 | 0.0 |
| November | 49°F (9°C) | 32°F (0°C) | 40°F (5°C) | 2.5" | 0.3" | 15.9 | 0.0 |
| December | 36°F (2°C) | 22°F (-5°C) | 29°F (-1°C) | 1.9" | 3.2" | 26.2 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 2.0"
Snow: 5.0"
11.4 days with precipitation
February 1.8"
Snow: 6.2"
9.3 days with precipitation
March 2.3"
Snow: 2.1"
10.2 days with precipitation
April 3.9"
Snow: 0.1"
12.3 days with precipitation
May 4.5"
12.4 days with precipitation
June 4.3"
10.6 days with precipitation
July 4.5"
9.2 days with precipitation
August 4.0"
9.2 days with precipitation
September 3.2"
8.0 days with precipitation
October 3.1"
9.5 days with precipitation
November 2.5"
Snow: 0.3"
9.9 days with precipitation
December 1.9"
Snow: 3.2"
10.6 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 25
50% probability date
Last Spring Freeze
April 19
50% probability date
Growing Season
189 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,171
Higher = more heating needed
Cooling Degree Days
872
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Joliet Brandon RD Dam's climate means for you
Joliet Brandon RD Dam runs 50°F a year - peaking in July, coldest in January.
- Gardeners get about 189 frost-free days, with the last spring freeze near April 19 - plan the planting calendar around it, not the regional average.
- Energy bills track 6,171 heating and 872 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: Joliet Brandon RD Dam, IL
Based on station USC00114530 feeding NOAA's 1991–2020 climate normals, Joliet Brandon RD Dam, Illinois averages 50°F a year, ranging from a mean daily high of 60°F to a mean daily low of 41°F. July is typically the warmest month of the year, while January is the coldest. Because these figures are thirty-year averages rather than any single year's readings, they describe the typical month, not a forecast for it.
Rainfall (and snow, where it falls) shapes day-to-day life here as much as temperature does. Joliet Brandon RD Dam sees about 38.0 inches of precipitation a year, with 16.9 inches typically falling as snow. The frost-free season averages 189 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 19 and the first fall freeze near October 25. On the energy side, 6,171 heating degree days and 872 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Joliet Brandon RD Dam scores 68/100 (Good), 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 Joliet Brandon RD Dam, IL? ▼
The average annual temperature in Joliet Brandon RD Dam, Illinois is 50°F. The warmest month averages 84°F (29°C) and the coldest averages 17°F (-9°C).
How much rain does Joliet Brandon RD Dam get? ▼
Joliet Brandon RD Dam receives 38.0 inches of precipitation annually, including 16.9 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Joliet Brandon RD Dam? ▼
Joliet Brandon RD Dam has a climate comfort score of 68/100 (Good), milder than 58% of U.S. cities in the PlainClimate database.
When is the growing season in Joliet Brandon RD Dam? ▼
Joliet Brandon RD Dam has approximately 189 frost-free days per year, with the last spring freeze around April 19 and the first fall freeze around October 25.
How much energy does heating and cooling require in Joliet Brandon RD Dam? ▼
Joliet Brandon RD Dam has 6,171 heating degree days and 872 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 Joliet Brandon RD Dam climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00114530 near Joliet Brandon RD Dam.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00114530. 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.