Moline Quad City, 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 Moline Quad City's primary NOAA station, MOLINE QUAD CITY INTL AP.
The climate verdict for Moline Quad City
Moline Quad City, Illinois has a mixed annual climate rather than one dominant extreme. Its NOAA normal shows an annual average of 51°F. Its climate comfort score of 59/100 (moderate) lands mid-pack nationally, exceeding 37% of station-mapped location scores.
- 51°F
- average temperature, NOAA 1991-2020 normal
- 59/100
- comfort score, above 37% of station-mapped location scores
- 38.3"
- annual precipitation · 36" snow
- 177 days
- frost-free growing season
Moline Quad City: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USW00014923 · Moline Quad City, IL 51°F mean · 38.3" precip
TEMP-COOL · RANK-MID · PHOTO-FINISH · PRCP-MID · SWING-WIDE · COMF-MID · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 51°F
- RANK-MID #3,156
- PHOTO-FINISH ≈ New Boston Dam
- PRCP-MID 38.3"
- SWING-WIDE 52°F
- COMF-MID 59/100
- LOAD-HEAT 6,024 HDD
- STN-1 USW00014923
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: New Boston Dam, 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.
- Moline Quad City (this station) 51°F
- Hot Aurora, NE 51°F
- Near New Boston Dam, IL 51°F
- Near Weeping Water, NE 51°F
- Near Grantsville, UT 51°F
Climate Living Index · Moline Quad City
Moline Quad City: 54/100 · grade D
Moline Quad City publishes all six Living Index dimensions from NOAA annual/seasonal normals · NOAA daily multivariate normals · NOAA hourly normals.
PlainClimate-derived for Moline Quad City, not an official NOAA rating. Rankings still use Comfort Score 59/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Precipitation balance | 38.3 in · 3.3 from 35 in | 88/100 · A |
| Normal heat + freeze calendar | 132 calendar days | 58/100 · C |
| Frost-free season | 177 days/year | 48/100 · D |
| Annual temperature balance | 51.2°F · 16.3° from 67.5°F | 46/100 · D |
| Summer moisture balance | 63.1°F mean dew point | 44/100 · D |
| Snowfall burden | 36.1 inches/year | 32/100 · F |
Moline Quad City · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Moline Quad City is a continental Köppen climate: Dfa
Coldest-month mean 23.3°F and warmest-month mean 75.5°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
- 75.5°F
- Coldest month
- 23.3°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 Moline Quad City sits across the climate record
Three NOAA fields for Moline Quad City's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- 46th percentile warmth
- Mid-pack annual mean versus 6,861 station normals.
- Annual precipitation
- 54th percentile wetness
- Neither arid nor torrential versus 6,352 station totals.
- Seasonal temperature swing
- Wider than 86%
- Warmest-to-coldest month gap for Moline Quad City is large versus 6,861 complete station-years.
How Moline Quad City compares across U.S. station-mapped locations
Moline Quad City's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
59 37th percentile score exceeds 37% 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%). This entry sits in this band.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 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
Moline Quad City's measured station temperature trend
MethodologyAcross 81 complete annual observations from 1944 to 2025, MOLINE QUAD CITY INTL AP warmed at a fitted rate of 0.17°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Moline Quad City primary station fitted change +0.17 °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 | 32°F (0°C) | 15°F (-10°C) | 23°F (-5°C) | 1.7" | 10.8" | 28.7 | 0.0 |
| February | 37°F (3°C) | 19°F (-7°C) | 28°F (-2°C) | 1.8" | 8.6" | 24.8 | 0.0 |
| March | 50°F (10°C) | 30°F (-1°C) | 40°F (4°C) | 2.6" | 4.4" | 19.6 | 0.0 |
| April | 63°F (17°C) | 40°F (4°C) | 51°F (11°C) | 3.8" | 1.1" | 6.3 | 0.1 |
| May | 74°F (23°C) | 51°F (11°C) | 63°F (17°C) | 4.7" | 0.0" | 0.4 | 1.1 |
| June | 83°F (28°C) | 61°F (16°C) | 72°F (22°C) | 5.0" | 0.0" | 0.0 | 5.4 |
| July | 86°F (30°C) | 65°F (18°C) | 76°F (24°C) | 4.2" | 0.0" | 0.0 | 8.1 |
| August | 84°F (29°C) | 63°F (17°C) | 73°F (23°C) | 4.0" | 0.0" | 0.0 | 4.9 |
| September | 78°F (26°C) | 54°F (12°C) | 66°F (19°C) | 3.3" | 0.0" | 0.2 | 2.5 |
| October | 65°F (18°C) | 43°F (6°C) | 54°F (12°C) | 2.8" | 0.3" | 4.6 | 0.1 |
| November | 50°F (10°C) | 31°F (-1°C) | 40°F (5°C) | 2.3" | 2.1" | 17.4 | 0.0 |
| December | 37°F (3°C) | 21°F (-6°C) | 29°F (-2°C) | 2.0" | 8.8" | 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 132 dates carry a normal low at or below freezing, the coldest 14°F near January 20.
The freezing stretch
The normal low stays at or below 32°F into March 23, then returns to freezing around November 13, covering 132 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 7, when 40% of years recorded at least a hundredth of an inch. The driest is September 28 at 28%. Summed across the calendar, that is about 117 wet dates a year.
The widest day
September 18 carries the biggest normal gap between afternoon and dawn, 24°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Moline Quad City.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 10.8"
9.3 days with precipitation
Snow: 8.6"
8.7 days with precipitation
Snow: 4.4"
10.4 days with precipitation
Snow: 1.1"
11.3 days with precipitation
12.2 days with precipitation
11.3 days with precipitation
8.6 days with precipitation
9.4 days with precipitation
8.4 days with precipitation
Snow: 0.3"
9.0 days with precipitation
Snow: 2.1"
8.9 days with precipitation
Snow: 8.8"
9.5 days with precipitation
Moline Quad City spreads its precipitation across the year
Neither half of the year dominates here: June through August take 35% of the annual total and December through February 14%, with neither reaching the 35% that would mark a distinct wet season. Moline Quad City 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: June averages 5.0" and January 1.7". The three wettest months together take 36% 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.
How Moline Quad City's precipitation splits across the calendar
About 117 days a year record measurable precipitation here, carrying 38.3" between them, or roughly 0.33 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Winter brings real snow to Moline Quad City
Moline Quad City averages 36.1 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 25 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: 36.1 inches of depth.
- Days recording measurable snow: about 25 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 9% 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 18
50% probability date
Last Spring Freeze
April 24
50% probability date
Growing Season
177 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
6,024
Higher = more heating needed
Cooling Degree Days
1,041
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 73% | 8.9 | 44% | 39% |
| February | 70% | 9.6 | 45% | 38% |
| March | 62% | 10.4 | 46% | 32% |
| April | 62% | 9.4 | 49% | 28% |
| May | 67% | 7.5 | 52% | 20% |
| June | 69% | 6.7 | 58% | 12% |
| July | 72% | 5.7 | 61% | 10% |
| August | 73% | 6.0 | 61% | 12% |
| September | 68% | 7.2 | 62% | 19% |
| October | 68% | 8.6 | 52% | 33% |
| November | 73% | 8.8 | 48% | 39% |
| December | 75% | 9.0 | 46% | 41% |
Nationwide similar cities
Other rankable U.S. places outside IL closest to Moline Quad City 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 (51°F here).
- Bellingham, WA 51°F · 0.0°F off
- Bloomfield, IA 51°F · 0.0°F off
- Burlington, IA 51°F · 0.0°F off
- Denver, CO 51°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (38.3" here), excluding temperature-peer places.
- Farmingdale, NY 38.3" · 0.0" off
- Haysville, KS 38.3" · 0.0" off
- Eau Claire, MI 38.3" · 0.0" off
- Guthrie, OK 38.2" · 0.0" off
Snow and freeze rhythm
When cold and snow define Moline Quad City
heating led · moderate · mid swing
Moline Quad City's energy balance leans toward cold weather: 6,024 annual heating degree days against 1,041 for cooling. Its 52.2°F seasonal range still makes the monthly rows more useful than the annual average alone.
Moline Quad City's frost-free season lasts about 177 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Moline Quad City coldest normal
January
Averaging 23°F (-5°C), this month sits below freezing for the month as a whole, not merely overnight.
-
2. Moline Quad City typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Moline Quad City snow peak
January
Moline Quad City averages 36.1 inches of snow a year, with January the snowiest month on the normals.
Questions about Moline Quad City's climate
How much snow does Moline Quad City get? ▼
How cold does Moline Quad City get in winter? ▼
How much energy does heating and cooling require in Moline Quad City? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Moline Quad City's primary station: MOLINE QUAD CITY INTL AP (USW00014923). 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 Moline Quad City; 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 Moline Quad City 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.