Keokuk Lock Dam, IA 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 Keokuk Lock Dam's primary NOAA station, KEOKUK LOCK DAM 19.
The climate verdict for Keokuk Lock Dam
Keokuk Lock Dam, Iowa 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
- yearly average temperature, NOAA normal
- 68/100
- comfort score, above 56% of station-mapped location scores
- 39.8"
- yearly precipitation total
- 200 days
- frost-free growing season
Keokuk Lock Dam: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00134381 · Keokuk Lock Dam, IA 52°F mean · 39.8" 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 #3,431
- PHOTO-FINISH ≈ Ordway
- PRCP-MID 39.8"
- SWING-WIDE 51°F
- COMF-MID 68/100
- LOAD-HEAT 5,775 HDD
- STN-1 USC00134381
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Ordway, CO (+ 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 IA station list.
- Keokuk Lock Dam (this station) 52°F
- Cold Hamilton, MO 52°F
- Hot Chicago Midway, IL 52°F
- Near Ordway, CO 52°F
- Near Tooele, UT 52°F
Climate Living Index · Keokuk Lock Dam
Keokuk Lock Dam: 62/100 · grade C
Keokuk Lock Dam publishes 4 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 2 missing weights rescale to 100.
PlainClimate-derived for Keokuk Lock Dam, not an official NOAA rating. Rankings still use Comfort Score 68/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 39.8 in · 4.8 from 35 in | 83/100 · B |
| Frost-free season | 200 days/year | 64/100 · C |
| Normal heat + freeze calendar | 124 calendar days | 62/100 · C |
| Annual temperature balance | 52.1°F · 15.4° from 67.5°F | 50/100 · D |
Keokuk Lock Dam · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Keokuk Lock Dam is a continental Köppen climate: Dfa
Coldest-month mean 24.9°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
- 24.9°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 Keokuk Lock Dam sits across the climate record
Three NOAA fields for Keokuk Lock Dam's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 50th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 57th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Wider than 84%
- Warmest-to-coldest month gap for Keokuk Lock Dam is large versus 6,861 complete station-years.
How Keokuk Lock Dam compares across U.S. station-mapped locations
Keokuk Lock 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
Keokuk Lock Dam's measured station temperature trend
MethodologyAcross 71 complete annual observations from 1933 to 2025, KEOKUK LOCK DAM 19 warmed at a fitted rate of 0.10°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Keokuk Lock Dam primary station fitted change +0.10 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 33°F (1°C) | 17°F (-8°C) | 25°F (-4°C) | 1.6" | 28.3 | 0.0 |
| February | 38°F (3°C) | 20°F (-6°C) | 29°F (-2°C) | 1.8" | 24.2 | 0.0 |
| March | 50°F (10°C) | 31°F (-1°C) | 40°F (5°C) | 2.5" | 17.7 | 0.0 |
| April | 62°F (17°C) | 41°F (5°C) | 52°F (11°C) | 4.2" | 4.0 | 0.0 |
| May | 73°F (23°C) | 53°F (11°C) | 63°F (17°C) | 5.3" | 0.0 | 0.7 |
| June | 82°F (28°C) | 63°F (17°C) | 72°F (22°C) | 5.2" | 0.0 | 5.2 |
| July | 86°F (30°C) | 67°F (19°C) | 76°F (24°C) | 4.1" | 0.0 | 9.5 |
| August | 84°F (29°C) | 65°F (18°C) | 74°F (24°C) | 3.8" | 0.0 | 7.2 |
| September | 77°F (25°C) | 56°F (13°C) | 67°F (19°C) | 3.4" | 0.1 | 3.0 |
| October | 65°F (18°C) | 44°F (7°C) | 55°F (13°C) | 3.3" | 2.3 | 0.2 |
| November | 51°F (10°C) | 33°F (0°C) | 42°F (5°C) | 2.6" | 14.6 | 0.0 |
| December | 38°F (3°C) | 23°F (-5°C) | 30°F (-1°C) | 1.9" | 25.6 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 86°F around July 10, short of 90°F on every date, while 124 dates carry a normal low at or below freezing, the coldest 16°F near January 19.
The freezing stretch
The normal low stays at or below 32°F into March 19, then returns to freezing around November 17, covering 124 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 3, when 41% of years recorded at least a hundredth of an inch. The driest is September 3 at 25%. Summed across the calendar, that is about 108 wet dates a year.
The widest day
September 23 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 Keokuk Lock Dam.
Where Keokuk Lock Dam Stands Nationally
Days and nights track unusually close together; the widest normal swing, about 22°F, is narrower than most stations record.
Keokuk Lock 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
8.0 days with precipitation
7.9 days with precipitation
9.1 days with precipitation
11.0 days with precipitation
12.6 days with precipitation
10.4 days with precipitation
9.4 days with precipitation
7.6 days with precipitation
7.1 days with precipitation
8.6 days with precipitation
7.9 days with precipitation
7.7 days with precipitation
Keokuk Lock 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 14%, with neither reaching the 35% that would mark a distinct wet season. Keokuk Lock Dam has no dry season to plan around, though it does carry a wide 51.2°F gap between its warmest and coldest month.
The gap between the wettest and driest month still matters: May averages 5.3" and January 1.6". 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 Keokuk Lock Dam, it arrives in quantity
39.8" of precipitation falls across only about 107 wet days here, averaging 0.37 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 107 a year, 29% of all days
- Average depth per wet day
- 0.37 inches
- Most wet days
- May, about 13
- 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.
Frost Dates & Growing Season
First Fall Freeze
October 27
50% probability date
Last Spring Freeze
April 10
50% probability date
Growing Season
200 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
5,775
Higher = more heating needed
Cooling Degree Days
1,103
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside IA closest to Keokuk Lock 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).
- Canon City, CO 52°F · 0.0°F off
- Donora, PA 52°F · 0.0°F off
- Dyer, NV 52°F · 0.0°F off
- Everett, WA 52°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (39.8" here), excluding temperature-peer places.
- Celina, OH 39.8" · 0.0" off
- Marathon, FL 39.7" · 0.0" off
- Bartlesville, OK 39.7" · 0.0" off
- Princeton, IL 39.8" · 0.0" off
Data-derived climate profile
How Keokuk Lock Dam's climate pattern fits together
heating led · moderate · mid swing
Keokuk Lock Dam's energy balance leans toward cold weather: 5,775 annual heating degree days against 1,103 for cooling. Its 51.2°F seasonal range still makes the monthly rows more useful than the annual average alone.
Keokuk Lock Dam's frost-free season lasts about 200 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 Keokuk Lock Dam's middle-range seasonal profile. The measured spread is 51.2°F. The annual average is 52°F. Neither the annual mean nor one extreme month represents the full calendar on its own.
Keokuk Lock Dam's 39.8 inches of annual precipitation falls in PlainClimate's middle band, so “wet” or “dry” is not the leading description. Snowfall is not added to the interpretation because its annual value is missing. Temperature balance and the calendar distribution carry more information than the annual moisture label alone.
These labels group NOAA 1991-2020 normals from Keokuk Lock Dam'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 Keokuk Lock Dam, not an official NOAA class or a year-ahead forecast.
Questions about Keokuk Lock Dam's climate
How much rain does Keokuk Lock Dam get? ▼
How cold does Keokuk Lock Dam get in winter? ▼
How much energy does heating and cooling require in Keokuk Lock Dam? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Keokuk Lock Dam's primary station: KEOKUK LOCK DAM 19 (USC00134381). 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 Keokuk Lock 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 Keokuk Lock 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.