Carlinville, IL Climate: Temperature & Rain by Month
Pulled from NOAA NCEI 1991–2020 normals →: climate measurements used in PlainClimate's documented score
30-year climate normals (1991-2020) from Carlinville's primary NOAA station, CARLINVILLE.
The climate verdict for Carlinville
Carlinville, Illinois has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 53°F. Its climate comfort score of 68/100 (good) lands mid-pack nationally, exceeding 56% of station-mapped location scores.
- 53°F
- average temperature, NOAA 1991-2020 normal
- 68/100
- comfort score, above 56% of station-mapped location scores
- 40.0"
- annual precipitation · 17" snow
- 190 days
- frost-free growing season
Carlinville: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00111280 · Carlinville, IL 53°F mean · 40.0" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 53°F
- RANK-MID #3,774
- PHOTO-FINISH ≈ Jerseyville
- PRCP-MID 40.0"
- SWING-WIDE 48°F
- COMF-MID 68/100
- LOAD-HEAT 5,320 HDD
- STN-1 USC00111280
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Jerseyville, 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.
- Hot Mattoon, IL 54°F
- Near Shelbyville Dam, IL 54°F
- Carlinville (this station) 53°F
- Near Jerseyville, IL 53°F
- Near Mattoon Coles C…, IL 53°F
Climate Living Index · Carlinville
Carlinville: 63/100 · grade C
Carlinville publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Carlinville, not an official NOAA rating. Rankings still use Comfort Score 68/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 40.0 in · 5.0 from 35 in | 82/100 · B |
| Normal heat + freeze calendar | 118 calendar days | 66/100 · C |
| Frost-free season | 190 days/year | 57/100 · C |
| Annual temperature balance | 53.4°F · 14.1° from 67.5°F | 54/100 · D |
| Snowfall burden | 16.5 inches/year | 54/100 · D |
Carlinville · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Carlinville is a continental Köppen climate: Dfa
Coldest-month mean 27.7°F and warmest-month mean 76.1°F place this station in continental, no dry season, hot summer climates (Dfa). Class Dfa is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: continental, specifically continental, no dry season, hot summer.
- Köppen code
- Dfa
- Group
- Continental
- Warmest month
- 76.1°F
- Coldest month
- 27.7°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Carlinville sits across the climate record
Three NOAA fields for Carlinville's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 55th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 58th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Wider than 75%
- Warmest-to-coldest month gap for Carlinville is large versus 6,861 complete station-years.
How Carlinville compares across U.S. station-mapped locations
Carlinville's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
68 Top 44% score exceeds 56% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). Below this entry.
- 40–50: 1,113 station-mapped locations (18%). Below this entry.
- 50–60: 1,329 station-mapped locations (21%). Below this entry.
- 60–70: 1,236 station-mapped locations (20%). This entry sits in this band.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 36°F (2°C) | 19°F (-7°C) | 28°F (-2°C) | 2.3" | 5.8" | 26.6 | 0.0 |
| February | 41°F (5°C) | 23°F (-5°C) | 32°F (0°C) | 2.1" | 4.7" | 21.7 | 0.0 |
| March | 52°F (11°C) | 32°F (0°C) | 42°F (6°C) | 2.9" | 2.3" | 16.1 | 0.0 |
| April | 65°F (18°C) | 43°F (6°C) | 54°F (12°C) | 4.7" | 0.0" | 3.8 | 0.0 |
| May | 74°F (23°C) | 54°F (12°C) | 64°F (18°C) | 4.3" | 0.0" | 0.2 | 0.7 |
| June | 83°F (28°C) | 63°F (17°C) | 73°F (23°C) | 4.6" | 0.0" | 0.0 | 5.5 |
| July | 86°F (30°C) | 66°F (19°C) | 76°F (24°C) | 3.4" | 0.0" | 0.0 | 9.6 |
| August | 85°F (29°C) | 64°F (18°C) | 74°F (24°C) | 3.2" | 0.0" | 0.0 | 8.2 |
| September | 79°F (26°C) | 55°F (13°C) | 67°F (19°C) | 3.3" | 0.0" | 0.1 | 2.7 |
| October | 67°F (19°C) | 44°F (7°C) | 55°F (13°C) | 3.3" | 0.0" | 3.5 | 0.1 |
| November | 53°F (12°C) | 33°F (1°C) | 43°F (6°C) | 3.5" | 0.9" | 13.4 | 0.0 |
| December | 41°F (5°C) | 25°F (-4°C) | 33°F (0°C) | 2.3" | 2.8" | 24.1 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 86°F around July 9, short of 90°F on every date, while 118 dates carry a normal low at or below freezing, the coldest 19°F near January 19.
The freezing stretch
The normal low stays at or below 32°F into March 15, then returns to freezing around November 19, covering 118 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.
Where the wet dates fall
The likeliest wet date is April 29, when 41% of years recorded at least a hundredth of an inch. The driest is February 2 at 23%. Summed across the calendar, that is about 106 wet dates a year.
The widest day
September 23 carries the biggest normal gap between afternoon and dawn, 25°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Carlinville.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 5.8"
8.5 days with precipitation
Snow: 4.7"
7.1 days with precipitation
Snow: 2.3"
9.0 days with precipitation
11.4 days with precipitation
11.3 days with precipitation
9.4 days with precipitation
8.1 days with precipitation
7.3 days with precipitation
8.1 days with precipitation
8.9 days with precipitation
Snow: 0.9"
8.0 days with precipitation
Snow: 2.8"
7.8 days with precipitation
Carlinville spreads its precipitation across the year
Neither half of the year dominates here: June through August take 28% of the annual total and December through February 17%, with neither reaching the 35% that would mark a distinct wet season. Carlinville has no dry season to plan around, though it does carry a wide 48.4°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: April averages 4.7" and February 2.1". The three wettest months together take 34% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
When it rains in Carlinville, it arrives in quantity
40.0" of precipitation falls across only about 105 wet days here, averaging 0.38 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 105 a year, 29% of all days
- Average depth per wet day
- 0.38 inches
- Most wet days
- April, about 11
- Fewest wet days
- February, about 7
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Winter brings real snow to Carlinville
Carlinville averages 16.5 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 8 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 16.5 inches of depth.
- Days recording measurable snow: about 8 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 4% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
October 21
50% probability date
Last Spring Freeze
April 14
50% probability date
Growing Season
190 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,320
Higher = more heating needed
Cooling Degree Days
1,142
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside IL closest to Carlinville 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 (53°F here).
- Clayton, NM 53°F · 0.0°F off
- Doylestown, PA 53°F · 0.0°F off
- Fulton, MO 53°F · 0.0°F off
- Navajo Dam, NM 53°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (40.0" here), excluding temperature-peer places.
- Pulaski, VA 40.0" · 0.0" off
- Salisbury, MO 40.0" · 0.0" off
- Bluffton, IN 40.0" · 0.0" off
- Platteville, WI 40.0" · 0.0" off
Snow and freeze rhythm
When cold and snow define Carlinville
heating led · moderate · mid swing
Carlinville's energy balance leans toward cold weather: 5,320 annual heating degree days against 1,142 for cooling. Its 48.4°F seasonal range still makes the monthly rows more useful than the annual average alone.
Carlinville's frost-free season lasts about 190 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Carlinville coldest normal
January
The monthly mean of 28°F (-2°C) sits near freezing, so cold nights and above-freezing afternoons share the same month.
-
2. Carlinville typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Carlinville snow peak
January
Carlinville averages 16.5 inches of snow a year, with January the snowiest month on the normals.
Questions about Carlinville's climate
How much snow does Carlinville get? ▼
How cold does Carlinville get in winter? ▼
How much energy does heating and cooling require in Carlinville? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Carlinville's primary station: CARLINVILLE (USC00111280). 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 1711202). Match rule for Carlinville: 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 Carlinville 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.