Antioch, IL Climate: Temperature by Month
Temperature and precipitation from NOAA NCEI 1991–2020 normals →, plus PlainClimate's derived comfort score
30-year climate normals (1991-2020) from Antioch's primary NOAA station, ANTIOCH.
The climate verdict for Antioch
Antioch, Illinois has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 49°F. July is the warmest month at 73°F and January the coldest at 22°F.
- 49°F
- yearly average temperature, NOAA normal
- 181 days
- frost-free growing season
Antioch: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00110203 · Antioch, IL 49°F mean
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-UNK · SWING-WIDE · COMF-UNK · LOAD-HEAT · STN-1 · BOOK-PART
- TEMP-COOL 49°F
- RANK-COOL #2,333
- PHOTO-FINISH ≈ McHenry -wg Str…
- PRCP-UNK Rain n/a
- SWING-WIDE 51°F
- COMF-UNK Comfort n/a
- LOAD-HEAT 6,704 HDD
- STN-1 USC00110203
- BOOK-PART 4/6 fields
Nearest mean-temperature peer: McHenry -wg Stratton L&d, IL (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every IL station list.
- Antioch (this station) 49°F
- Cold Mt Carroll, IL 49°F
- Hot Purdum, NE 49°F
- Near McHenry -wg Str…, IL 49°F
- Near Thermopolis, WY 49°F
Climate Living Index · Antioch
Antioch: 45/100 · grade D
Antioch publishes 3 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 3 missing weights rescale to 100.
PlainClimate-derived for Antioch, not an official NOAA rating. Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 140 calendar days | 53/100 · D |
| Frost-free season | 181 days/year | 51/100 · D |
| Annual temperature balance | 48.6°F · 18.9° from 67.5°F | 34/100 · F |
Antioch · 2026-08-04 · NOAA NCEI Climate Normals · method .
National standing · heating-led station
Where Antioch sits across the climate record
Available NOAA 1991–2020 fields for Antioch are ranked only against stations that publish the same field, missing metrics stay blank rather than estimated.
- Annual temperature
- 34th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Seasonal temperature swing
- Wider than 83%
- Warmest-to-coldest month gap for Antioch is large versus 6,861 complete station-years.
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 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 83°F around July 11, short of 90°F on every date, while 140 dates carry a normal low at or below freezing, the coldest 14°F near January 22.
The freezing stretch
The normal low stays at or below 32°F into April 1, then returns to freezing around November 14, covering 140 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
The widest day
May 27 carries the biggest normal gap between afternoon and dawn, 21°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Antioch.
Where Antioch Stands Nationally
Among the steadiest day-night climates ranked: even the widest normal daily swing holds to roughly 21°F.
Antioch earns one nationally notable standing (outer quintile) against 6,860 NOAA 1991–2020 normals stations, middle-of-the-pack metrics stay silent here.
Monthly Precipitation
Average monthly rainfall
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
Nationwide similar cities
Other rankable U.S. places outside IL closest to Antioch on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (49°F here).
- Baker, NV 49°F · 0.0°F off
- Blissfield, MI 49°F · 0.0°F off
- Bloomingdale, MI 49°F · 0.0°F off
- Brockport, NY 49°F · 0.0°F off
Data-derived climate profile
How Antioch's climate pattern fits together
heating led · mid swing
Antioch's energy balance leans toward cold weather: 6,704 annual heating degree days against 766 for cooling. Its 50.9°F seasonal range still makes the monthly rows more useful than the annual average alone.
Antioch's frost-free season lasts about 181 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
July and January mark the typical warm and cold ends of the calendar in Antioch's middle-range seasonal profile. The measured spread is 50.9°F. The annual average is 49°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
A moisture-range label is withheld because Antioch's annual precipitation total is unavailable. Monthly source values remain visible where NOAA provides them, and no annual amount is reconstructed from incomplete data.
These labels group NOAA 1991-2020 normals from Antioch's primary station, so the winter figures are a thirty-year average and not a floor: a single hard season can run well below them. Treat each band as a descriptive range for Antioch, not an official NOAA class or a year-ahead forecast.
Questions about Antioch's climate
How cold does Antioch get in winter? ▼
How much energy does heating and cooling require in Antioch? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Antioch's primary station: ANTIOCH (USC00110203). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 1701595). Match rule for Antioch: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Antioch comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.