Lockport weather in July

In July, Lockport sees average daytime highs of 83°F and overnight lows near 66°F, with 3.7 in of rain across 11.4 wet days and about 14.7 hours of daylight. It is the 1st-warmest and 4th-wettest month of the year here.

Day-to-day highs hold fairly steady near 83°F through the month. The sky is clear or mostly clear about 35% of the time in July, and the air most often feels muggy.

Daylight stretches from about 15 hours at the start of July to 14 h 18 min by month's end. Set against the rest of the year, July is Lockport's 3rd-clearest and 11th-windiest month. For the whole year in context, see Lockport's year-round climate.

Daytime high
83°
1st warmest
Overnight low
66°
12th coldest
Rainfall
3.7 in
11.4 wet days
Daylight
14 h 42 min
4:36 AM – 7:20 PM
Cloud cover
55%
3rd clearest
Wind
6 mph
11th windiest
Solar energy
6.34 kWh/m²
Travel score
5.7
out of 10

Lockport is city in Will County, Illinois, United States.

Density
845/km²
people per km²
Founded
1853

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 83°F through the month.

A typical July day in Lockport reaches about 83°F in the afternoon and slips back to 66°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 75°F and 91°F. Set against its neighbours, July runs about 3°F warmer than June and about 2°F warmer than August.

50°60°70°80°90°151015202531
Avg high (°F)Avg low (°F)
18265
28265
38365
48365
58365
68365
78365
88366
98366
108366
118366
128366
138366
148366
158366
168366
178366
188366
198366
208366
218366
228366
238366
248366
258366
268366
278366
288366
298366
308365
318265

How July really feels in Lockport

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.

Lockport 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
Jan32° / 18°2.38.65.59.30.0
Feb36° / 21°2.07.14.610.30.0
Mar47° / 31°2.810.22.811.71.6
Apr60° / 41°4.412.40.713.14.4
May70° / 52°4.612.5014.36.1
Jun80° / 62°4.311.70156.3
Jul83° / 66°3.711.4014.75.7
Aug81° / 64°3.710.2013.76.5
Sep75° / 56°2.98.3012.37.1
Oct62° / 44°3.29.20.110.95.5
Nov48° / 33°2.78.61.29.71.9
Dec37° / 24°2.28.33.890.0

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 35% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 19% of July, with mostly cloudy or overcast conditions the remaining 46%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15545
25545
35545
45545
55545
65545
75545
85545
95545
105545
115545
125446
135446
145347
155347
165347
175347
185347
195248
205248
215248
225248
235248
245248
255347
265347
275446
285446
295545
305545
315545

Chance of precipitation in July

Any precipitation

Lockport gets around 3.7 in of rain over 11.4 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 37% and peaks near 39% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
139
239
338
438
538
638
738
838
937
1037
1137
1238
1338
1438
1538
1638
1738
1838
1937
2037
2137
2237
2337
2437
2536
2636
2735
2835
2934
3034
3133

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 30% of days. Sticky, muggy-or-worse air turns up on roughly 48% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
115212228140
214222128140
314222128140
414222128151
513222228151
613212229151
713212229151
812202229151
912202330151
1011192330161
1111192331161
1210182331171
1310182331171
1410172331171
1510172331181
1610172231182
179172231192
189162231192
199162231192
209172231192
219172231192
229172231192
239182231192
248192230192
258192230182
268202230182
278212330172
288222329162
298222329161
308232428161
318232428161

Wind in July

Winds average 6 mph in July.

Across July, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
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 15 hours at the start of July to 14 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 42 minutes over July. Sunrise moves from 4:26 AM to 4:49 AM, and sunset from 7:25 PM to 7:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
115.04:267:25
215.04:277:25
315.04:277:25
414.94:287:25
514.94:287:24
614.94:297:24
714.94:297:24
814.94:307:24
914.94:317:23
1014.94:317:23
1114.84:327:22
1214.84:337:22
1314.84:337:22
1414.84:347:21
1514.84:357:20
1614.74:367:20
1714.74:377:19
1814.74:377:19
1914.74:387:18
2014.64:397:17
2114.64:407:17
2214.64:417:16
2314.64:427:15
2414.54:437:14
2514.54:447:13
2614.54:457:12
2714.44:457:11
2814.44:467:10
2914.44:477:09
3014.34:487:08
3114.34:497:07

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.34 kWh/m².

For context, solar energy here swings from a low near 1.67 kWh/m² to a high of 6.4 kWh/m² in June across the year — July's 6.34 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.5Intense
86.5Intense
96.5Intense
106.4Intense
116.4Intense
126.4Intense
136.4Intense
146.4Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.3Intense
206.3Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.2Intense
276.1Intense
286.1Intense
296.1Intense
306.1Intense
316.1Intense
Planning a trip in July

Is July a good time to visit Lockport?

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

5.7
Sightseeing
5th-best month of the year
6.7
Beach & pool
2nd-best month of the year

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

What to pack for Lockport in July

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

In July, Lockport sees daytime highs around 83°F and nights near 66°F. Pack light clothes and sun protection. Worth having: rain gear. About 11 days see rain.

light clothessun protectionrain gear

Sea temperature near Lockport in July

The nearest coast averages about 70°F in July — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 30 mi away) is warmest in August at about 73°F and coldest in February near 36°F.

It's comfortable for a long swim from Jul 13 to Sep 15 — about 2.1 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmcomfortable to swim
Sea temperature (°F)Comfort
Jan38Bracing
Feb36Bracing
Mar36Bracing
Apr39Bracing
May45Bracing
Jun57Bracing
Jul70Refreshing
Aug73Refreshing
Sep68Refreshing
Oct58Bracing
Nov49Bracing
Dec42Bracing

UV index in Lockport 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 Lockport peaks around June 22 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 22UV 9Dec 21UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May7Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec2Low

Air quality in Lockport 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 Lockport is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (October, 8 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1418 µg/m³Oct 238 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb14Moderate
Mar15Moderate
Apr15Moderate
May17Moderate
Jun17Moderate
Jul18Moderate
Aug16Moderate
Sep12Moderate
Oct8Good
Nov9Good
Dec10Good
Location & terrain

Where is Lockport?

Lockport sits at 41.6°N, 88.1°W, 594 ft above sea level, in United States. The nearest listed city is Crest Hill, 3.1 mi away.

Topography around Lockport

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

Within 2 miles, the terrain around Lockport has only modest variations in elevation — a maximum elevation change of 305 ft around an average of 630 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 427 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 751 ft.

The land around Lockport is covered by trees (34%), grassland (31%) and artificial surfaces (24%) within 2 miles, trees (30%), grassland (26%) and artificial surfaces (25%) within 10 miles, and cropland (47%) within 50 miles.

2 miles
305 ft
10 miles
427 ft
50 miles
751 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
July weather nearby: Crest Hill 3.1 mi · Romeoville 4.3 mi · Joliet 4.3 mi · Homer Glen 6.2 mi · Lemont 6.2 mi · Goodings Grove 6.8 mi · New Lenox 7.5 mi · Bolingbrook 7.5 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 Lockport (41.5895°, -88.0578°, elevation 594 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).