Quincy weather in July

In July, Quincy sees average daytime highs of 86°F and overnight lows near 69°F, with 3.4 in of rain across 9 wet days and about 14.5 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 86°F through the month. The sky is clear or mostly clear about 43% of the time in July, and the air most often feels muggy.

Daylight stretches from about 14 h 48 min at the start of July to 14 h 12 min by month's end. Set against the rest of the year, July is Quincy's 3rd-clearest and 11th-windiest month. For the whole year in context, see Quincy's year-round climate.

Daytime high
86°
1st warmest
Overnight low
69°
12th coldest
Rainfall
3.4 in
9 wet days
Daylight
14 h 36 min
4:54 AM – 7:28 PM
Cloud cover
50%
3rd clearest
Wind
6 mph
11th windiest
Solar energy
6.42 kWh/m²
Travel score
5.2
out of 10

Quincy is county seat of Adams County, Illinois, United States.

Density
988/km²
people per km²
Founded
1819

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 86°F through the month.

A typical July day in Quincy reaches about 86°F in the afternoon and slips back to 69°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 79°F and 94°F. Set against its neighbours, July runs about 3°F warmer than June and about 2°F warmer than August.

60°70°80°90°100°151015202531
Avg high (°F)Avg low (°F)
18568
28568
38568
48668
58668
68669
78669
88669
98669
108669
118669
128769
138769
148769
158769
168769
178769
188769
198769
208769
218769
228769
238669
248669
258669
268669
278669
288668
298668
308668
318668

How July really feels in Quincy

Once humidity and wind are folded in, July averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

July sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Quincy weather by month

How July compares with the rest of the year at a glance. July is the 1st-warmest and 4th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan36° / 20°1.97.24.29.50.0
Feb40° / 24°2.273.210.40.2
Mar52° / 34°2.99.61.811.72.8
Apr64° / 45°4.411.30.3135.4
May74° / 55°4.612.7014.26.3
Jun83° / 65°4.010.5014.85.8
Jul86° / 69°3.49014.55.2
Aug84° / 66°3.28.4013.65.7
Sep78° / 58°3.37.4012.37.3
Oct65° / 46°2.88.50.210.96.2
Nov51° / 35°2.97.60.99.82.8
Dec40° / 25°2.16.92.89.20.2

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 17% of July, with mostly cloudy or overcast conditions the remaining 40%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15842
25842
35842
45842
55941
65941
76040
86040
96040
106040
116139
126139
136139
146139
156139
166040
176040
186040
196040
206040
216040
225941
235941
246040
256040
266040
276040
286040
296139
306139
316238

Chance of precipitation in July

Any precipitation

Quincy gets around 3.4 in of rain over 9 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 29% and peaks near 33% on the wettest days.

0%10%20%30%40%151015202531
Rain chance (%)
133
233
333
432
532
632
731
831
930
1029
1129
1228
1328
1427
1527
1627
1727
1826
1926
2026
2127
2227
2327
2428
2528
2628
2728
2829
2929
3029
3129

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

Most of July feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, July lands in the muggy band about 29% of days. Sticky, muggy-or-worse air turns up on roughly 60% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
16171935230
26171934240
35171933250
45171933251
55161932261
65162032271
75152032271
85142032281
94132132282
104132132292
114122132292
124122131302
133112131312
143112230312
153112230323
163112229323
173112229323
183112228333
193122327323
203122327333
213122327333
223132326333
233132326332
243142425322
253142425312
263152425302
273162525292
283162525282
293162526272
303162626262
314162627252

Wind in July

Winds average 6 mph in July.

Across July, daily wind ranges from about 6 mph on the calmest days to 6 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm
316calm

Sunrise & sunset in July

DaylightNight

Daylight runs from about 14 h 48 min at the start of July to 14 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 36 minutes over July. Sunrise moves from 4:45 AM to 5:07 AM, and sunset from 7:33 PM to 7:17 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
114.84:457:33
214.84:457:33
314.84:467:33
414.84:467:33
514.84:477:33
614.74:477:32
714.74:487:32
814.74:497:32
914.74:497:32
1014.74:507:31
1114.74:507:31
1214.74:517:30
1314.64:527:30
1414.64:537:30
1514.64:537:29
1614.64:547:28
1714.64:557:28
1814.54:567:27
1914.54:567:27
2014.54:577:26
2114.54:587:25
2214.44:597:25
2314.45:007:24
2414.45:017:23
2514.35:017:22
2614.35:027:21
2714.35:037:21
2814.35:047:20
2914.25:057:19
3014.25:067:18
3114.25:077:17

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.42 kWh/m².

For context, solar energy here swings from a low near 1.84 kWh/m² to a high of 6.44 kWh/m² in June across the year — July's 6.42 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.6Intense
26.6Intense
36.6Intense
46.6Intense
56.6Intense
66.6Intense
76.5Intense
86.5Intense
96.5Intense
106.5Intense
116.5Intense
126.5Intense
136.5Intense
146.5Intense
156.5Intense
166.5Intense
176.5Intense
186.4Intense
196.4Intense
206.4Intense
216.4Intense
226.3Intense
236.3Intense
246.3Intense
256.3Intense
266.3Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
316.2Intense
Planning a trip in July

Hazard calendar for Quincy

In seasonPeak

In July, Quincy sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Quincy sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is July a good time to visit Quincy?

Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.2
Sightseeing
7th-best month of the year
7.1
Beach & pool
2nd-best month of the year

July is a reasonable time to visit Quincy for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Quincy in July

From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In July, Quincy sees daytime highs around 86°F and nights near 69°F. Pack light clothes and sun protection. Worth having: rain gear. About 9 days see rain.

light clothessun protectionrain gear

UV index in Quincy in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Quincy peaks around June 20 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 20UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun10Very high
Jul9Very high
Aug8Very high
Sep7High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Quincy in July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July falls, not just the annual average.

Air quality in Quincy is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (October, 7 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodJul 1716 µg/m³Oct 237 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb12Moderate
Mar12Good
Apr10Good
May13Moderate
Jun14Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct7Good
Nov7Good
Dec8Good
Location & terrain

Where is Quincy?

Quincy sits at 39.9°N, 91.4°W, 568 ft above sea level, in United States. The nearest listed city is Hannibal, 16 mi away.

Topography around Quincy

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Quincy.

Within 2 miles, the terrain around Quincy has only modest variations in elevation — a maximum elevation change of 230 ft around an average of 551 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 328 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 702 ft.

The land around Quincy is covered by trees (35%) and artificial surfaces (29%) within 2 miles, cropland (53%) and trees (26%) within 10 miles, and cropland (53%) and trees (32%) within 50 miles.

2 miles
230 ft
10 miles
328 ft
50 miles
702 ft
treesgrasslandcroplandartificial surfaceswater
July weather nearby: Hannibal 16 mi · Macomb 53 mi · Burlington 62 mi · Jacksonville 64 mi · Kirksville 65 mi · Wentzville 83 mi · Columbia 84 mi · O'Fallon 86 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Quincy (39.9356°, -91.4099°, elevation 568 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).