Gladstone Dam, IL Climate: Temperature & Rain by Month
Annual temperature and rainfall from NOAA NCEI's 1991–2020 normals →; comfort score computed by PlainClimate
30-year climate normals (1991-2020) from Gladstone Dam's primary NOAA station, GLADSTONE DAM 18.
The climate verdict for Gladstone Dam
Gladstone Dam, Illinois has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 52°F. Its climate comfort score of 68/100 (good) lands mid-pack nationally, exceeding 56% of station-mapped location scores.
- 52°F
- annual average temperature (NOAA normal)
- 68/100
- comfort score, above 56% of station-mapped location scores
- 37.2"
- annual precipitation · 17" snow
- 204 days
- growing season, frost-free days
Gladstone Dam: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00113455 · Gladstone Dam, IL 52°F mean · 37.2" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 52°F
- RANK-MID #3,362
- PHOTO-FINISH ≈ Curtis
- PRCP-MID 37.2"
- SWING-WIDE 52°F
- COMF-MID 68/100
- LOAD-HEAT 5,853 HDD
- STN-1 USC00113455
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Curtis, NE (+ 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.
- Gladstone Dam (this station) 52°F
- Cold Bethany, MO 52°F
- Hot Trenton Dam, NE 52°F
- Near Curtis, NE 52°F
- Near Colby, KS 52°F
Climate Living Index · Gladstone Dam
Gladstone Dam: 63/100 · grade C
Gladstone Dam publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Gladstone Dam, not an official NOAA rating. Rankings still use Comfort Score 68/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 37.2 in · 2.2 from 35 in | 91/100 · A |
| Frost-free season | 204 days/year | 67/100 · C |
| Normal heat + freeze calendar | 125 calendar days | 62/100 · C |
| Snowfall burden | 16.9 inches/year | 53/100 · D |
| Annual temperature balance | 51.9°F · 15.6° from 67.5°F | 49/100 · D |
Gladstone Dam · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Gladstone Dam is a continental Köppen climate: Dfa
Coldest-month mean 24.0°F and warmest-month mean 76.2°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
- 76.2°F
- Coldest month
- 24.0°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 Gladstone Dam sits across the climate record
Three NOAA fields for Gladstone Dam's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 49th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 52nd percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Wider than 86%
- Warmest-to-coldest month gap for Gladstone Dam is large versus 6,861 complete station-years.
How Gladstone Dam compares across U.S. station-mapped locations
Gladstone Dam'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 | 32°F (0°C) | 16°F (-9°C) | 24°F (-4°C) | 1.4" | 4.9" | 28.9 | 0.0 |
| February | 37°F (3°C) | 20°F (-7°C) | 28°F (-2°C) | 1.7" | 6.3" | 25.1 | 0.0 |
| March | 49°F (9°C) | 30°F (-1°C) | 40°F (4°C) | 2.4" | 1.8" | 19.4 | 0.0 |
| April | 62°F (17°C) | 42°F (5°C) | 52°F (11°C) | 3.8" | 0.3" | 4.4 | 0.0 |
| May | 73°F (23°C) | 53°F (12°C) | 63°F (17°C) | 5.0" | 0.0" | 0.1 | 0.5 |
| June | 82°F (28°C) | 63°F (17°C) | 73°F (23°C) | 4.7" | 0.0" | 0.0 | 4.6 |
| July | 86°F (30°C) | 67°F (19°C) | 76°F (25°C) | 4.0" | 0.0" | 0.0 | 8.0 |
| August | 84°F (29°C) | 65°F (18°C) | 74°F (24°C) | 3.6" | 0.0" | 0.0 | 5.2 |
| September | 78°F (25°C) | 56°F (13°C) | 67°F (19°C) | 3.6" | 0.0" | 0.1 | 2.1 |
| October | 65°F (18°C) | 45°F (7°C) | 55°F (13°C) | 2.8" | 0.1" | 2.3 | 0.1 |
| November | 50°F (10°C) | 33°F (0°C) | 41°F (5°C) | 2.5" | 0.3" | 15.2 | 0.0 |
| December | 37°F (3°C) | 22°F (-5°C) | 30°F (-1°C) | 1.8" | 3.2" | 26.6 | 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 125 dates carry a normal low at or below freezing, the coldest 15°F near January 21.
The freezing stretch
The normal low stays at or below 32°F into March 20, then returns to freezing around November 17, covering 125 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 9, when 39% of years recorded at least a hundredth of an inch. The driest is January 26 at 23%. Summed across the calendar, that is about 103 wet dates a year.
The widest day
September 22 carries the biggest normal gap between afternoon and dawn, 22°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Gladstone Dam.
Where Gladstone Dam Stands Nationally
Days and nights track unusually close together; the widest normal swing, about 22°F, is narrower than most stations record.
Gladstone Dam 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: 4.9"
7.1 days with precipitation
Snow: 6.3"
7.2 days with precipitation
Snow: 1.8"
8.4 days with precipitation
Snow: 0.3"
10.2 days with precipitation
11.9 days with precipitation
10.4 days with precipitation
8.8 days with precipitation
8.7 days with precipitation
7.2 days with precipitation
Snow: 0.1"
7.9 days with precipitation
Snow: 0.3"
7.8 days with precipitation
Snow: 3.2"
7.3 days with precipitation
Gladstone Dam spreads its precipitation across the year
Neither half of the year dominates here: June through August take 33% of the annual total and December through February 13%, with neither reaching the 35% that would mark a distinct wet season. Gladstone Dam has no dry season to plan around, though it does carry a wide 52.2°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: May averages 5.0" and January 1.4". The three wettest months together take 37% 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 Gladstone Dam, it arrives in quantity
37.2" of precipitation falls across only about 103 wet days here, averaging 0.36 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 103 a year, 28% of all days
- Average depth per wet day
- 0.36 inches
- Most wet days
- May, about 12
- Fewest wet days
- January, 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 Gladstone Dam
Gladstone Dam averages 16.9 inches of snowfall a year, with February the snowiest month on the normals, spread across roughly 7 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: 16.9 inches of depth.
- Days recording measurable snow: about 7 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 5% 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 29
50% probability date
Last Spring Freeze
April 8
50% probability date
Growing Season
204 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,853
Higher = more heating needed
Cooling Degree Days
1,108
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside IL closest to Gladstone Dam 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 (52°F here).
- Atwood, KS 52°F · 0.0°F off
- Boston, MA 52°F · 0.0°F off
- Connellsville, PA 52°F · 0.0°F off
- Curtis, NE 52°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (37.2" here), excluding temperature-peer places.
- Gaylord, MI 37.2" · 0.0" off
- Honeoye, NY 37.2" · 0.0" off
- Goliad, TX 37.2" · 0.0" off
- Wallace, ID 37.2" · 0.0" off
Snow and freeze rhythm
When cold and snow define Gladstone Dam
heating led · moderate · mid swing
Gladstone Dam's energy balance leans toward cold weather: 5,853 annual heating degree days against 1,108 for cooling. Its 52.2°F seasonal range still makes the monthly rows more useful than the annual average alone.
Gladstone Dam's frost-free season lasts about 204 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Gladstone Dam coldest normal
January
Averaging 24°F (-4°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Gladstone Dam typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Gladstone Dam snow peak
February
Gladstone Dam averages 16.9 inches of snow a year, with February the snowiest month on the normals.
Questions about Gladstone Dam's climate
How much snow does Gladstone Dam get? ▼
How cold does Gladstone Dam get in winter? ▼
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Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Gladstone Dam's primary station: GLADSTONE DAM 18 (USC00113455). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Gladstone Dam; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Gladstone Dam 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.