Sycamore weather in October

In October, Sycamore sees average daytime highs of 61°F and overnight lows near 43°F, with 3.1 in of precipitation across 9.1 wet days and about 10.9 hours of daylight. It is the 6th-warmest and 7th-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 34% 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 Sycamore's 4th-clearest and 6th-windiest month. For the whole year in context, see Sycamore's year-round climate.

Daytime high
61°
6th warmest
Overnight low
43°
7th coldest
Precipitation
3.1 in
9.1 wet days
Daylight
10 h 48 min
6:14 AM – 5:05 PM
Cloud cover
58%
4th clearest
Wind
9 mph
6th windiest
Solar energy
3.07 kWh/m²
Travel score
5.2
out of 10

Sycamore is city in Illinois, United States.

Density
700/km²
people per km²
Founded
1835

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 Sycamore 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
96545
106445
116444
126344
136344
146243
156243
166143
176142
186042
196042
205941
215941
225841
235840
245740
255740
265639
275639
285539
295538
305438
315438

How October really feels in Sycamore

Once humidity and wind are folded in, October averages 0 days that feel above 90°F and 3 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
3
wind chill below the day's low

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

Sycamore weather by month

How October compares with the rest of the year at a glance. October is the 6th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan29° / 16°2.07.65.79.30.0
Feb34° / 19°1.86.94.910.30.0
Mar46° / 29°2.69.32.911.71.3
Apr59° / 40°4.4120.913.14.1
May69° / 50°4.812.8014.35.9
Jun78° / 60°4.212.20156.3
Jul82° / 64°3.510.7014.76.4
Aug80° / 62°3.510.4013.76.6
Sep74° / 54°3.28.7012.37.0
Oct61° / 43°3.19.10.110.95.2
Nov47° / 32°2.47.71.69.61.5
Dec35° / 22°2.27.84.590.0

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 13% 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
25347
35347
45347
55248
65248
75248
85248
95248
105149
115149
125149
135149
145050
154951
164852
174753
184753
194753
204654
214555
224456
234357
244258
254258
264060
274060
284060
294060
303961
313961

Chance of precipitation in October

Any precipitationSnow

Sycamore gets around 3.1 in of rain and snow over 9.1 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 29% and peaks near 31% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)Snow chance (%)
1270
2270
3260
4260
5260
6260
7270
8270
9270
10270
11280
12280
13280
14290
15300
16300
17310
18310
19310
20310
21310
22310
23310
24301
25301
26291
27291
28281
29281
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 90% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1801262
2801262
3821152
4821152
5831052
6831052
786941
886941
987841
1087841
1188741
1289731
1389731
1491630
1592620
1692620
1792620
1893520
1993520
2093520
2193520
2294510
2395410
2495410
2595410
2695410
2795410
2895410
2995410
3095410
3197300

Wind in October

Winds average 9 mph in October.

Across October, daily wind ranges from about 8 mph on the calmest days to 9 mph at its breeziest. It stays fairly steady from day to day.

051015151015202531
Wind speed (mph)Feels
18light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
159light breeze
169light breeze
179light breeze
189light breeze
199light breeze
209light breeze
219light breeze
229light breeze
239light breeze
249light breeze
259light breeze
269light breeze
279light breeze
289light breeze
299light breeze
309light breeze
319light 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 5:57 AM to 6:33 AM, and sunset from 5:30 PM to 4:44 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.65:575:30
211.55:585:29
311.55:595:27
411.46:015:25
511.46:025:23
611.36:035:22
711.36:045:20
811.26:055:18
911.26:065:17
1011.16:075:15
1111.16:095:13
1211.06:105:12
1311.06:115:10
1410.96:125:08
1510.96:135:07
1610.86:145:05
1710.86:165:04
1810.86:175:02
1910.76:185:00
2010.76:194:59
2110.66:204:57
2210.66:224:56
2310.56:234:55
2410.56:244:53
2510.46:254:52
2610.46:274:50
2710.46:284:49
2810.36:294:48
2910.36:304:46
3010.26:324:45
3110.26:334:44

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3.07 kWh/m².

For context, solar energy here swings from a low near 1.69 kWh/m² to a high of 6.29 kWh/m² in June across the year — October's 3.07 kWh/m² falls in the middle.

01234151015202531
Solar energy (kWh/m²)Level
13.8Moderate
23.7Moderate
33.7Moderate
43.6Moderate
53.6Moderate
63.5Moderate
73.5Moderate
83.5Moderate
93.4Moderate
103.4Moderate
113.3Moderate
123.3Moderate
133.2Moderate
143.2Moderate
153.1Moderate
163.1Moderate
173.0Moderate
183.0Moderate
193.0Moderate
202.9Moderate
212.9Moderate
222.8Moderate
232.8Moderate
242.7Moderate
252.7Moderate
262.6Moderate
272.6Moderate
282.5Moderate
292.5Moderate
302.5Moderate
312.5Moderate
Planning a trip in October

Is October a good time to visit Sycamore?

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 Sycamore for sightseeing.

What to pack for Sycamore in October

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

In October, Sycamore 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

UV index in Sycamore 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 Sycamore peaks around June 19 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (low).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJun 19UV 9Dec 19UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar4Moderate
Apr6High
May8Very high
Jun9Very high
Jul8Very high
Aug8Very high
Sep6High
Oct3Moderate
Nov2Moderate
Dec2Low

Air quality in Sycamore 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 Sycamore 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 Sycamore?

Sycamore sits at 42.0°N, 88.7°W, 873 ft above sea level, in United States. The nearest listed city is DeKalb, 5.0 mi away.

Topography around Sycamore

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

Within 2 miles, the terrain around Sycamore has only modest variations in elevation — a maximum elevation change of 115 ft around an average of 853 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 328 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 846 ft.

The land around Sycamore is covered by cropland (38%), grassland (22%) and artificial surfaces (21%) within 2 miles, cropland (79%) within 10 miles, and cropland (56%) and trees (20%) within 50 miles.

2 miles
115 ft
10 miles
328 ft
50 miles
846 ft
treesgrasslandcroplandartificial surfaceswater
October weather nearby: DeKalb 5.0 mi · Wasco 15 mi · Huntley 18 mi · St. Charles 20 mi · South Elgin 21 mi · Belvidere 21 mi · Geneva 21 mi · Elgin 21 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 Sycamore (41.9889°, -88.6868°, elevation 873 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).