Belleville weather in June

In June, Belleville sees average daytime highs of 85°F and overnight lows near 67°F, with 4.1 in of rain across 10.8 wet days and about 14.6 hours of daylight. It is the 3rd-warmest and 3rd-wettest month of the year here.

Highs climb over the month, from about 82°F in the first days to 87°F by the end. The sky is clear or mostly clear about 34% of the time in June, and the air most often feels muggy.

Daylight stretches from about 14 h 30 min at the start of June to 14 h 42 min by month's end. Set against the rest of the year, June is Belleville's 5th-clearest and 9th-windiest month. For the whole year in context, see Belleville's year-round climate.

Daytime high
85°
3rd warmest
Overnight low
67°
10th coldest
Rainfall
4.1 in
10.8 wet days
Daylight
14 h 42 min
4:40 AM – 7:20 PM
Cloud cover
55%
5th clearest
Wind
6 mph
9th windiest
Solar energy
6.47 kWh/m²
Travel score
5.2
out of 10

Belleville is city in and seat of St. Clair County, Illinois, United States.

Density
691/km²
people per km²
Founded
1814

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

Temperature in June

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 82°F in the first days to 87°F by the end.

A typical June day in Belleville reaches about 85°F in the afternoon and slips back to 67°F overnight — a 17°F spread between the day's warmth and the night's chill. On most days the high lands between 76°F and 93°F. Set against its neighbours, June runs about 9°F warmer than May and about 3°F cooler than July.

50°60°70°80°90°151015202530
Avg high (°F)Avg low (°F)
18164
28264
38265
48265
58265
68365
78366
88366
98466
108467
118467
128567
138567
148568
158568
168568
178668
188669
198669
208669
218669
228769
238769
248769
258769
268769
278770
288770
298770
308770

How June really feels in Belleville

Once humidity and wind are folded in, June 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

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

Belleville weather by month

How June compares with the rest of the year at a glance. June is the 3rd-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan40° / 25°2.98.32.99.60.0
Feb45° / 29°2.67.62.610.51.0
Mar56° / 38°3.810.81.311.73.7
Apr67° / 48°4.811.50.1135.9
May76° / 58°5.113.3014.16.3
Jun85° / 67°4.110.8014.65.2
Jul88° / 71°3.49.8014.44.6
Aug86° / 68°2.99.1013.55.1
Sep80° / 60°3.27.6012.37.0
Oct68° / 49°3.58.40116.7
Nov55° / 38°3.78.70.69.93.6
Dec44° / 29°2.88.529.40.7

Cloud cover in June

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in June.

Beyond those clear spells, partly cloudy skies cover about 18% of June, with mostly cloudy or overcast conditions the remaining 48%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14654
24753
34753
44753
54951
64951
74951
85050
95050
105149
115149
125248
135248
145347
155248
165347
175347
185347
195446
205446
215545
225545
235545
245545
255545
265545
275545
285545
295644
305743

Chance of precipitation in June

Any precipitation

Belleville gets around 4.1 in of rain over 10.8 wet days in June. 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 38% on the wettest days.

0%10%20%30%40%50%151015202530
Rain chance (%)
137
236
336
436
536
636
736
836
937
1037
1137
1237
1337
1437
1538
1638
1738
1837
1937
2037
2137
2236
2336
2436
2536
2636
2736
2836
2936
3036

Humidity in June

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, June lands in the muggy band about 34% of days. Sticky, muggy-or-worse air turns up on roughly 49% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
12818222930
22619213030
32519213140
42420213150
52320213250
62120213260
72020203370
81920203380
91819213390
1017192134100
1115182134110
1214172135120
1313172135140
1412162136150
1511152136160
1611152136170
1710142136180
1810142137190
199142137190
209142137200
218132137200
228132136210
237132137210
247132236220
257132235230
266132235240
276132234240
286132234250
296132233260
305132233271

Wind in June

Winds average 6 mph in June.

Across June, 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.

0246810151015202530
Wind speed (mph)Feels
17calm
27calm
37calm
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

Sunrise & sunset in June

DaylightNight

Daylight runs from about 14 h 30 min at the start of June to 14 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over June. Sunrise moves from 4:43 AM to 4:43 AM, and sunset from 7:12 PM to 7:23 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
114.54:437:12
214.54:437:13
314.54:427:13
414.54:427:14
514.64:427:15
614.64:417:15
714.64:417:16
814.64:417:16
914.64:417:17
1014.64:407:18
1114.64:407:18
1214.64:407:19
1314.74:407:19
1414.74:407:20
1514.74:407:20
1614.74:407:20
1714.74:407:21
1814.74:407:21
1914.74:407:21
2014.74:407:22
2114.74:407:22
2214.74:417:22
2314.74:417:22
2414.74:417:23
2514.74:417:23
2614.74:427:23
2714.74:427:23
2814.74:427:23
2914.74:437:23
3014.74:437:23

Solar energy in June

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in June, about 6.47 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 1.91 kWh/m² to a high of 6.47 kWh/m² in June across the year — June's 6.47 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.1Intense
26.2Intense
36.2Intense
46.2Intense
56.2Intense
66.3Intense
76.3Intense
86.3Intense
96.3Intense
106.3Intense
116.4Intense
126.4Intense
136.4Intense
146.5Intense
156.5Intense
166.5Intense
176.5Intense
186.5Intense
196.5Intense
206.6Intense
216.6Intense
226.6Intense
236.6Intense
246.6Intense
256.6Intense
266.6Intense
276.6Intense
286.6Intense
296.6Intense
306.6Intense
Planning a trip in June

Is June a good time to visit Belleville?

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

5.2
Sightseeing
5th-best month of the year
6.7
Beach & pool
4th-best month of the year

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

What to pack for Belleville in June

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

In June, Belleville sees daytime highs around 85°F and nights near 67°F. Pack light clothes and sun protection. Worth having: rain gear. About 11 days see rain.

light clothessun protectionrain gear

UV index in Belleville in June

LowModerateHighVery highExtreme

Clear-sky midday UV in June 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 Belleville peaks around June 22 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 22UV 9Dec 23UV 2
UV index (midday)Level
Jan2Moderate
Feb3Moderate
Mar5High
Apr7High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep7High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Belleville in June

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Belleville is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.3× the cleanest month (October, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1418 µg/m³Oct 238 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb12Good
Mar12Good
Apr11Good
May14Moderate
Jun16Moderate
Jul18Moderate
Aug15Moderate
Sep12Moderate
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Belleville?

Belleville sits at 38.5°N, 90.0°W, 515 ft above sea level, in United States. The nearest listed city is Fairview Heights, 5.0 mi away.

Topography around Belleville

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

Within 2 miles, the terrain around Belleville has only modest variations in elevation — a maximum elevation change of 128 ft around an average of 528 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 364 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 981 ft.

The land around Belleville is covered by trees (54%) and artificial surfaces (28%) within 2 miles, trees (39%) and cropland (38%) within 10 miles, and cropland (44%) and trees (42%) within 50 miles.

2 miles
128 ft
10 miles
364 ft
50 miles
981 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
June weather nearby: Fairview Heights 5.0 mi · O'Fallon 6.2 mi · Collinsville 11 mi · East Saint Louis 12 mi · St. Louis 14 mi · Granite City 16 mi · Lemay 16 mi · Oakville 17 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 Belleville (38.52°, -89.984°, elevation 515 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. 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).