Bartlett weather in October

In October, Bartlett sees average daytime highs of 61°F and overnight lows near 43°F, with 3.1 in of precipitation across 9 wet days and about 10.9 hours of daylight. It is the 6th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 67°F in the first days to 55°F by the end. The sky is clear or mostly clear about 33% 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 12 min by month's end. Set against the rest of the year, October is Bartlett's 4th-clearest and 6th-windiest month. For the whole year in context, see Bartlett's year-round climate.

Daytime high
61°
6th warmest
Overnight low
43°
7th coldest
Precipitation
3.1 in
9 wet days
Daylight
10 h 48 min
6:12 AM – 5:03 PM
Cloud cover
59%
4th clearest
Wind
8 mph
6th windiest
Solar energy
3.05 kWh/m²
Travel score
5.2
out of 10

Bartlett is village straddling Cook, DuPage and Kane Counties in Illinois, United States of America.

Density
1,011/km²
people per km²
Founded
1891

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 67°F in the first days to 55°F by the end.

A typical October day in Bartlett reaches about 61°F in the afternoon and slips back to 43°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 49°F and 74°F. Set against its neighbours, October runs about 13°F cooler than September and about 14°F warmer than November.

20°40°60°80°151015202531
Avg high (°F)Avg low (°F)
16848
26748
36747
46747
56647
66646
76546
86546
96445
106445
116444
126344
136344
146244
156243
166143
176142
186042
196042
205942
215941
225841
235841
245740
255740
265640
275639
285539
295538
305438
315438

How October really feels in Bartlett

Once humidity and wind are folded in, October averages 0 days that feel above 90°F and 1 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
1
wind chill below the day's low

The story in October is cold — wind chill drags the overnight "feels like" below the raw low.

Bartlett 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
Jan30° / 16°2.17.95.79.30.0
Feb34° / 20°1.974.910.30.0
Mar46° / 29°2.69.63.111.71.4
Apr58° / 39°4.512113.14.1
May69° / 50°4.612.5014.36.0
Jun79° / 60°4.212.30156.3
Jul82° / 65°3.711.2014.76.1
Aug80° / 62°3.710.6013.76.5
Sep74° / 55°3.18.4012.37.1
Oct61° / 43°3.190.210.95.2
Nov47° / 32°2.481.59.61.5
Dec35° / 22°2.284.490.0

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 33% of the time in October.

Beyond those clear spells, partly cloudy skies cover about 14% of October, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15248
25248
35347
45347
55347
65347
75347
85248
95248
105248
115248
125248
135149
145050
155050
164951
174852
184753
194555
204456
214456
224258
234258
244159
254060
263961
273961
283961
293862
303862
313961

Chance of precipitation in October

Any precipitationSnow

Bartlett gets around 3.1 in of rain and snow over 9 wet days in October. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable precipitation averages around 28% and peaks near 30% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1280
2280
3270
4270
5270
6270
7270
8280
9280
10280
11280
12280
13280
14290
15290
16300
17300
18300
19300
20300
21300
22301
23301
24291
25291
26291
27281
28282
29282
30272
31272

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 89% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1781273
2791263
3811162
4821152
5821152
6831052
7841042
885942
985942
1087841
1188831
1289731
1389731
1490721
1591621
1692620
1792620
1892620
1993520
2093520
2193520
2293520
2393520
2495410
2595410
2695410
2795410
2895410
2995410
3095410
3195410

Wind in October

Winds average 8 mph in October.

Across October, daily wind ranges from about 8 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
18light breeze
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light breeze
148light breeze
158light breeze
168light breeze
178light breeze
188light breeze
198light breeze
208light 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 12 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 84 minutes over October. Sunrise moves from 5:55 AM to 6:31 AM, and sunset from 5:28 PM to 4:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.65:555:28
211.55:565:27
311.55:575:25
411.45:595:23
511.46:005:21
611.36:015:20
711.36:025:18
811.26:035:16
911.26:045:15
1011.16:055:13
1111.16:075:11
1211.06:085:10
1311.06:095:08
1410.96:105:06
1510.96:115:05
1610.86:125:03
1710.86:145:02
1810.86:155:00
1910.76:164:58
2010.76:174:57
2110.66:184:55
2210.66:204:54
2310.56:214:53
2410.56:224:51
2510.46:234:50
2610.46:254:48
2710.46:264:47
2810.36:274:46
2910.36:284:44
3010.26:304:43
3110.26:314:42

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3.05 kWh/m².

For context, solar energy here swings from a low near 1.62 kWh/m² to a high of 6.3 kWh/m² in June across the year — October's 3.05 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.7Moderate
23.7Moderate
33.6Moderate
43.6Moderate
53.6Moderate
63.5Moderate
73.5Moderate
83.4Moderate
93.4Moderate
103.4Moderate
113.3Moderate
123.3Moderate
133.2Moderate
143.2Moderate
153.1Moderate
163.1Moderate
173.0Moderate
183.0Moderate
192.9Moderate
202.9Moderate
212.8Moderate
222.8Moderate
232.7Moderate
242.7Moderate
252.7Moderate
262.6Moderate
272.6Moderate
282.5Moderate
292.5Moderate
302.5Moderate
312.4Moderate
Planning a trip in October

Is October a good time to visit Bartlett?

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

5.2
Sightseeing
6th-best month of the year
1.2
Beach & pool
6th-best month of the year

October is a reasonable time to visit Bartlett for sightseeing.

What to pack for Bartlett in October

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

In October, Bartlett sees daytime highs around 61°F and nights near 43°F. Worth packing: a warm layer and rain gear. About 9 days see rain.

a warm layerrain gear

Sea temperature near Bartlett in October

The nearest coast averages about 58°F in October — 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 Bartlett in October

LowModerateHighVery highExtreme

Clear-sky midday UV in October peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Bartlett peaks around June 23 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 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecLowModerateHighVery highHighModerateLowJun 23UV 9Dec 22UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May7Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec2Low

Air quality in Bartlett 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 Bartlett is worst in July — around 17 µg/m³ PM2.5 (moderate), about 1.9× the cleanest month (October, 9 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodJul 1817 µg/m³Oct 229 µg/m³
PM2.5 (µg/m³)Level
Jan12Moderate
Feb15Moderate
Mar16Moderate
Apr14Moderate
May15Moderate
Jun16Moderate
Jul17Moderate
Aug16Moderate
Sep13Moderate
Oct9Good
Nov10Good
Dec11Good
Location & terrain

Where is Bartlett?

Bartlett sits at 42.0°N, 88.2°W, 810 ft above sea level, in United States. The nearest listed city is Hanover Park, 1.9 mi away.

Topography around Bartlett

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

Within 2 miles, the terrain around Bartlett has only modest variations in elevation — a maximum elevation change of 161 ft around an average of 807 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 892 ft.

The land around Bartlett is covered by trees (36%), artificial surfaces (33%) and grassland (26%) within 2 miles, trees (38%), artificial surfaces (30%) and grassland (26%) within 10 miles, and cropland (37%) within 50 miles.

2 miles
161 ft
10 miles
364 ft
50 miles
892 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
October weather nearby: Hanover Park 1.9 mi · Streamwood 1.9 mi · South Elgin 5.6 mi · Roselle 5.6 mi · Elgin 5.6 mi · Schaumburg 5.6 mi · Bloomingdale 6.2 mi · Carol Stream 6.2 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 Bartlett (41.995°, -88.1856°, elevation 810 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).