Fairview Heights weather in October

In October, Fairview Heights sees average daytime highs of 68°F and overnight lows near 49°F, with 3.5 in of rain across 8.4 wet days and about 11 hours of daylight. It is the 6th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 74°F in the first days to 62°F by the end. The sky is clear or mostly clear about 46% of the time in October, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of October to 10 h 24 min by month's end. Set against the rest of the year, October is Fairview Heights's 2nd-clearest and 7th-windiest month. For the whole year in context, see Fairview Heights's year-round climate.

Daytime high
68°
6th warmest
Overnight low
49°
7th coldest
Rainfall
3.5 in
8.4 wet days
Daylight
11 hours
6:16 AM – 5:14 PM
Cloud cover
49%
2nd clearest
Wind
7 mph
7th windiest
Solar energy
3.5 kWh/m²
Travel score
6.7
out of 10

Fairview Heights is city in St. Clair County, Illinois, United States.

Density
561/km²
people per km²

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

Temperature in October

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 74°F in the first days to 62°F by the end.

A typical October day in Fairview Heights reaches about 68°F in the afternoon and slips back to 49°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 55°F and 80°F. Set against its neighbours, October runs about 12°F cooler than September and about 14°F warmer than November.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
17554
27454
37453
47453
57353
67352
77252
87251
97151
107151
117150
127050
136949
146949
156949
166849
176848
186748
196747
206647
216647
226547
236546
246446
256446
266445
276345
286345
296244
306244
316144

How October really feels in Fairview Heights

Once humidity and wind are folded in, October 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

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

Fairview Heights weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 6th-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 October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 11% of October, with mostly cloudy or overcast conditions the remaining 43%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26436
36436
46337
56337
66337
76238
86139
96040
105941
115941
125941
135941
145842
155743
165743
175743
185743
195644
205545
215545
225446
235446
245347
255248
265248
275149
285050
295050
305050
315050

Chance of precipitation in October

Any precipitation

Fairview Heights gets around 3.5 in of rain over 8.4 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 27% and peaks near 31% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202531
Rain chance (%)
122
221
321
421
521
622
722
823
923
1024
1125
1226
1326
1427
1527
1628
1728
1829
1929
2029
2130
2230
2330
2430
2531
2631
2731
2831
2931
3031
3131

Humidity in October

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, October lands in the dry band about 78% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
16415129
26415129
36614128
46714118
56913117
66913117
77013116
87112116
97312105
107312105
11751294
12761293
13771283
14781282
15791272
16801271
17811171
18821161
19821161
20831160
21841060
22841060
23841060
24851050
2586950
2686950
2786950
2886950
2987850
3087850
3187850

Wind in October

Winds average 7 mph in October.

Across October, daily wind ranges from about 7 mph on the calmest days to 8 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
137calm
147calm
157calm
167calm
177calm
187calm
197light breeze
207light breeze
218light breeze
228light breeze
238light breeze
248light breeze
258light breeze
268light breeze
278light breeze
288light breeze
298light breeze
308light breeze
318light breeze

Sunrise & sunset in October

DaylightNight

Daylight runs from about 11 h 36 min at the start of October to 10 h 24 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 72 minutes over October. Sunrise moves from 6:01 AM to 6:32 AM, and sunset from 5:37 PM to 4:55 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.66:015:37
211.66:025:35
311.56:035:34
411.56:045:32
511.46:055:31
611.46:065:29
711.36:075:28
811.36:085:26
911.36:095:25
1011.26:105:23
1111.26:115:22
1211.16:125:20
1311.16:135:19
1411.16:145:17
1511.06:155:16
1611.06:165:14
1710.96:175:13
1810.96:185:11
1910.96:195:10
2010.86:205:09
2110.86:215:07
2210.76:225:06
2310.76:235:05
2410.76:245:04
2510.66:255:02
2610.66:265:01
2710.56:275:00
2810.56:284:59
2910.56:304:58
3010.46:314:56
3110.46:324:55

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3.5 kWh/m².

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 — October's 3.5 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
14.2Bright
24.2Bright
34.2Bright
44.1Bright
54.0Bright
64.0Bright
74.0Moderate
83.9Moderate
93.8Moderate
103.8Moderate
113.7Moderate
123.7Moderate
133.6Moderate
143.6Moderate
153.5Moderate
163.5Moderate
173.5Moderate
183.4Moderate
193.4Moderate
203.3Moderate
213.3Moderate
223.2Moderate
233.2Moderate
243.1Moderate
253.1Moderate
263.0Moderate
273.0Moderate
283.0Moderate
292.9Moderate
302.9Moderate
312.8Moderate
Planning a trip in October

Is October a good time to visit Fairview Heights?

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

6.7
Sightseeing
2nd-best month of the year
3.6
Beach & pool
6th-best month of the year

October is a reasonable time to visit Fairview Heights for sightseeing.

What to pack for Fairview Heights in October

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

In October, Fairview Heights sees daytime highs around 68°F and nights near 49°F. Worth packing: rain gear. About 8 days see rain.

rain gear

UV index in Fairview Heights in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Fairview Heights 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 Fairview Heights in October

GoodModeratePoorUnhealthyVery unhealthy

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

Air quality in Fairview Heights 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 Fairview Heights?

Fairview Heights sits at 38.6°N, 90.0°W, 584 ft above sea level, in United States. The nearest listed city is O'Fallon, 4.3 mi away.

Topography around Fairview Heights

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

Within 2 miles, the terrain around Fairview Heights has only modest variations in elevation — a maximum elevation change of 141 ft around an average of 577 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 358 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 974 ft.

The land around Fairview Heights is covered by trees (46%) and artificial surfaces (22%) within 2 miles, trees (40%) and cropland (31%) within 10 miles, and cropland (46%) and trees (41%) within 50 miles.

2 miles
141 ft
10 miles
358 ft
50 miles
974 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: O'Fallon 4.3 mi · Belleville 5.0 mi · Collinsville 5.6 mi · East Saint Louis 8.7 mi · St. Louis 12 mi · Granite City 12 mi · Edwardsville 16 mi · Lemay 16 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 Fairview Heights (38.5889°, -89.9904°, elevation 584 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).