Rosiclare, IL Climate: Temperature & Rain by Month
Average temperature and precipitation from NOAA NCEI 1991–2020 normals →, with a derived climate comfort score
30-year climate normals (1991-2020) from Rosiclare's primary NOAA station, ROSICLARE 5NW.
The climate verdict for Rosiclare
Water is the standout signal in Rosiclare, Illinois: 50.9 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 55°F. Its climate comfort score of 63/100 (good) lands mid-pack nationally, exceeding 46% of station-mapped location scores.
- 55°F
- annual average temperature (NOAA normal)
- 63/100
- comfort score, above 46% of station-mapped location scores
- 50.9"
- annual precipitation · 3" snow
- 184 days
- growing season, frost-free days
Rosiclare: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00117487 · Rosiclare, IL 55°F mean · 50.9" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-WET · SWING-MID · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 55°F
- RANK-MID #4,048
- PHOTO-FINISH ≈ Seabrook Farms
- PRCP-WET 50.9"
- SWING-MID 44°F
- COMF-MID 63/100
- LOAD-HEAT 4,803 HDD
- STN-1 USC00117487
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Seabrook Farms, NJ (+ 0.1 °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.
- Rosiclare (this station) 55°F
- Hot Gallipolis, OH 55°F
- Near Seabrook Farms, NJ 55°F
- Near Chilo Meldahl L…, OH 55°F
- Near Portsmouth-scio…, OH 55°F
Climate Living Index · Rosiclare
Rosiclare: 60/100 · grade C
Rosiclare publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Rosiclare, not an official NOAA rating. Rankings still use Comfort Score 63/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Snowfall burden | 3.3 inches/year | 73/100 · B |
| Normal heat + freeze calendar | 112 calendar days | 69/100 · C |
| Annual temperature balance | 54.8°F · 12.7° from 67.5°F | 59/100 · C |
| Frost-free season | 184 days/year | 53/100 · D |
| Precipitation balance | 50.9 in · 15.9 from 35 in | 44/100 · D |
Rosiclare · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Rosiclare is a continental Köppen climate: Dfa
Coldest-month mean 31.8°F and warmest-month mean 75.8°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
- 75.8°F
- Coldest month
- 31.8°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 Rosiclare sits across the climate record
Three NOAA fields for Rosiclare's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 59th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- Top 17% wettest
- Rosiclare's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- 53rd percentile swing
- Typical seasonal amplitude versus 6,861 complete station-years.
How Rosiclare compares across U.S. station-mapped locations
Rosiclare's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
63 46th percentile score exceeds 46% 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
Rosiclare's measured station temperature trend
MethodologyAcross 31 complete annual observations from 1969 to 2021, ROSICLARE 5NW warmed at a fitted rate of 0.28°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Rosiclare primary station fitted change +0.28 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 41°F (5°C) | 22°F (-5°C) | 32°F (0°C) | 3.9" | 0.9" | 24.8 | 0.0 |
| February | 46°F (8°C) | 25°F (-4°C) | 36°F (2°C) | 3.7" | 1.4" | 21.2 | 0.0 |
| March | 56°F (13°C) | 33°F (1°C) | 45°F (7°C) | 5.1" | 0.2" | 15.1 | 0.0 |
| April | 68°F (20°C) | 43°F (6°C) | 55°F (13°C) | 5.1" | 0.0" | 4.9 | 0.0 |
| May | 75°F (24°C) | 53°F (11°C) | 64°F (18°C) | 5.3" | 0.0" | 0.4 | 0.1 |
| June | 83°F (28°C) | 62°F (16°C) | 72°F (22°C) | 4.6" | 0.0" | 0.0 | 5.0 |
| July | 86°F (30°C) | 65°F (18°C) | 76°F (24°C) | 4.4" | 0.0" | 0.0 | 11.0 |
| August | 86°F (30°C) | 63°F (17°C) | 75°F (24°C) | 3.2" | 0.0" | 0.0 | 10.1 |
| September | 80°F (27°C) | 55°F (13°C) | 68°F (20°C) | 3.2" | 0.0" | 0.1 | 4.4 |
| October | 69°F (21°C) | 43°F (6°C) | 56°F (13°C) | 3.6" | 0.2" | 4.6 | 0.2 |
| November | 56°F (13°C) | 33°F (1°C) | 45°F (7°C) | 4.2" | 0.0" | 14.9 | 0.0 |
| December | 45°F (7°C) | 26°F (-3°C) | 36°F (2°C) | 4.4" | 0.6" | 22.6 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 87°F around July 22, short of 90°F on every date, while 112 dates carry a normal low at or below freezing, the coldest 22°F near January 19.
The freezing stretch
The normal low stays at or below 32°F into March 11, then returns to freezing around November 21, covering 112 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 May 4, when 37% of years recorded at least a hundredth of an inch. The driest is September 13 at 22%. Summed across the calendar, that is about 110 wet dates a year.
The widest day
October 9 carries the biggest normal gap between afternoon and dawn, 27°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Rosiclare.
Where Rosiclare Stands Nationally
The normal water year runs well above the national norm at roughly 51 inches.
Rosiclare 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 and snowfall
Snow: 0.9"
9.5 days with precipitation
Snow: 1.4"
9.0 days with precipitation
Snow: 0.2"
11.5 days with precipitation
10.5 days with precipitation
11.0 days with precipitation
8.9 days with precipitation
9.0 days with precipitation
7.4 days with precipitation
6.7 days with precipitation
Snow: 0.2"
7.6 days with precipitation
8.6 days with precipitation
Snow: 0.6"
10.0 days with precipitation
Rosiclare spreads its precipitation across the year
Neither half of the year dominates here: June through August take 24% of the annual total and December through February 24%, with neither reaching the 35% that would mark a distinct wet season. Rosiclare has no dry season to plan around, though it does carry a 44°F seasonal spread.
The gap between the wettest and driest month still matters: May averages 5.3" and September 3.2". The three wettest months together take 31% 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 Rosiclare, it arrives in quantity
50.9" of precipitation falls across only about 110 wet days here, averaging 0.46 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 110 a year, 30% of all days
- Average depth per wet day
- 0.46 inches
- Most wet days
- March, about 12
- Fewest wet days
- September, 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.
Snow reaches Rosiclare, but rarely amounts to much
The normals record 3.3 inches of snow a year here, most likely in February. That is a real but marginal amount: enough that snow is part of the local record, not enough to define the winter.
A figure in this range usually reflects a handful of events that melt quickly rather than a season of accumulation; about 2 days a year record any measurable snow at all.
NOAA 1991-2020 normals. An average across thirty years can smooth away a single heavy winter, so a small annual figure does not mean a significant snowfall is impossible.
Frost Dates & Growing Season
First Fall Freeze
October 20
50% probability date
Last Spring Freeze
April 19
50% probability date
Growing Season
184 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
4,803
Higher = more heating needed
Cooling Degree Days
1,131
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside IL closest to Rosiclare 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 (55°F here).
- Courtland, KS 55°F · 0.0°F off
- Cynthiana, KY 55°F · 0.0°F off
- Free Union, VA 55°F · 0.0°F off
- Greensburg, KS 55°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (50.9" here), excluding temperature-peer places.
- Jackson, NC 50.9" · 0.0" off
- Bartow, FL 50.9" · 0.0" off
- Kaneohe, HI 50.9" · 0.0" off
- Princeton, KY 50.9" · 0.0" off
Data-derived climate profile
How Rosiclare's climate pattern fits together
heating led · wet · mid swing
Rosiclare's energy balance leans toward cold weather: 4,803 annual heating degree days against 1,131 for cooling. Its 44.0°F seasonal range still makes the monthly rows more useful than the annual average alone.
Rosiclare's frost-free season lasts about 184 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 Rosiclare's middle-range seasonal profile. The measured spread is 44.0°F. The annual average is 55°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Alongside its heating load, Rosiclare carries 50.9 inches of precipitation in a normal year, inside PlainClimate's wet range. Annual snowfall totals 3.3 inches. That distinction matters because a wet annual total can arrive as rain, snow, or a mixture at different times.
These labels group NOAA 1991-2020 normals from Rosiclare'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 Rosiclare, not an official NOAA class or a year-ahead forecast.
Questions about Rosiclare's climate
How much rain does Rosiclare get? ▼
How many days above 90°F does Rosiclare get? ▼
How much energy does heating and cooling require in Rosiclare? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Rosiclare's primary station: ROSICLARE 5NW (USC00117487). 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 1765897). Match rule for Rosiclare: 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 Rosiclare 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.