Climate Comfort Score
53/100
Moderate
NOAA 1991–2020 normals 49°F annual avg Public-domain federal data
Antioch, IL Climate
Temperature, precipitation, and comfort score from NOAA NCEI 1991–2020 normals →
- 49°F
- Avg annual temp
- 53/100
- Comfort score
- 181d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Antioch
Antioch, Illinois averages 49°F a year and scores 53/100 on the comfort index - moderate, milder than 26% of U.S. cities.
- 49°F
- yearly average temperature, NOAA normal
- 53/100
- comfort score, milder than 26% of U.S. cities
- 181 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
57°F
Avg Low
40°F
Annual Precip
N/A
Comfort Score
53/100
Moderate
Avg Annual Temperature
49°F
30-year mean (NOAA NCEI)
Annual Precipitation
N/A
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Antioch) 53.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Antioch area.
How Antioch compares to every U.S. city
Antioch's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
53 Top 74% higher than 26% 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 Antioch
MethodologyThe chart below traces how the U.S. land temperature anomaly has moved against the global mean since 1900. For Antioch, the NOAA 1991-2020 normal captures average conditions across that spread - notably, the most recent decade runs warmer than the 30-year mean itself.
- 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 | 30°F (-1°C) | 15°F (-10°C) | 22°F (-5°C) | N/A | 28.5 | 0.0 |
| February | 33°F (0°C) | 18°F (-8°C) | 25°F (-4°C) | N/A | 25.4 | 0.0 |
| March | 44°F (7°C) | 27°F (-3°C) | 35°F (2°C) | N/A | 22.7 | 0.0 |
| April | 56°F (13°C) | 37°F (3°C) | 47°F (8°C) | N/A | 8.4 | 0.0 |
| May | 68°F (20°C) | 48°F (9°C) | 58°F (15°C) | N/A | 0.5 | 0.3 |
| June | 78°F (26°C) | 59°F (15°C) | 68°F (20°C) | N/A | 0.0 | 2.8 |
| July | 82°F (28°C) | 64°F (18°C) | 73°F (23°C) | N/A | 0.0 | 4.3 |
| August | 81°F (27°C) | 63°F (17°C) | 72°F (22°C) | N/A | 0.0 | 3.1 |
| September | 74°F (23°C) | 55°F (13°C) | 64°F (18°C) | N/A | 0.2 | 1.0 |
| October | 61°F (16°C) | 42°F (6°C) | 52°F (11°C) | N/A | 3.6 | 0.0 |
| November | 47°F (8°C) | 31°F (0°C) | 39°F (4°C) | N/A | 16.5 | 0.0 |
| December | 35°F (2°C) | 21°F (-6°C) | 28°F (-2°C) | N/A | 27.3 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January N/A
February N/A
March N/A
April N/A
May N/A
June N/A
July N/A
August N/A
September N/A
October N/A
November N/A
December N/A
Frost Dates & Growing Season
First Fall Freeze
October 21
50% probability date
Last Spring Freeze
April 23
50% probability date
Growing Season
181 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,704
Higher = more heating needed
Cooling Degree Days
766
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Antioch's climate means for you
Antioch runs 49°F a year - peaking in July, coldest in January.
- Gardeners get about 181 frost-free days, with the last spring freeze near April 23 - plan the planting calendar around it, not the regional average.
- Energy bills track 6,704 heating and 766 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: Antioch, IL
In Antioch, Illinois, the NOAA 1991–2020 climate normals put the annual average temperature at 49°F, ranging from a mean daily high of 57°F to a mean daily low of 40°F. July is typically the warmest month of the year, while January is the coldest. As thirty-year averages computed from station USC00110203, these numbers smooth out year-to-year noise into a working baseline for a typical month.
Beyond temperature, Antioch averages an uncharted amount of precipitation annually, predominantly as rainfall - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 181 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 23 and the first fall freeze near October 21. Turning to energy use, 6,704 heating degree days and 766 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Antioch scores 53/100 (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 Antioch, IL? ▼
The average annual temperature in Antioch, Illinois is 49°F. The warmest month averages 82°F (28°C) and the coldest averages 15°F (-10°C).
How much rain does Antioch get? ▼
Antioch receives an unknown amount of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Antioch? ▼
Antioch has a climate comfort score of 53/100 (Moderate), milder than 26% of U.S. cities in the PlainClimate database.
When is the growing season in Antioch? ▼
Antioch has approximately 181 frost-free days per year, with the last spring freeze around April 23 and the first fall freeze around October 21.
How much energy does heating and cooling require in Antioch? ▼
Antioch has 6,704 heating degree days and 766 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 Antioch climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00110203 near Antioch.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00110203. 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.