Mattoon weather in October

In October, Mattoon sees average daytime highs of 65°F and overnight lows near 46°F, with 3.3 in of precipitation across 8.2 wet days and about 11 hours of daylight. It is the 6th-warmest and 7th-wettest month of the year here.

Highs ease over the month, from about 72°F in the first days to 59°F by the end. The sky is clear or mostly clear about 40% 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 18 min by month's end. Set against the rest of the year, October is Mattoon's 4th-clearest and 7th-windiest month. For the whole year in context, see Mattoon's year-round climate.

Daytime high
65°
6th warmest
Overnight low
46°
7th coldest
Precipitation
3.3 in
8.2 wet days
Daylight
10 h 54 min
6:10 AM – 5:07 PM
Cloud cover
53%
4th clearest
Wind
9 mph
7th windiest
Solar energy
3.39 kWh/m²
Travel score
6.2
out of 10

Mattoon is city in Illinois, United States.

Density
676/km²
people per km²
Founded
1853

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 72°F in the first days to 59°F by the end.

A typical October day in Mattoon reaches about 65°F in the afternoon and slips back to 46°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 53°F and 78°F. Set against its neighbours, October runs about 12°F cooler than September and about 14°F warmer than November.

20°40°60°80°151015202531
Avg high (°F)Avg low (°F)
17352
27251
37251
47151
57150
67150
77050
87049
96949
106948
116848
126848
136747
146747
156647
166546
176546
186546
196445
206445
216345
226344
236244
246244
256143
266143
276043
286042
295942
305942
315841

How October really feels in Mattoon

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.

Mattoon 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
Jan37° / 22°3.08.93.89.50.0
Feb41° / 25°2.57.83.410.40.3
Mar52° / 34°3.410.51.611.72.7
Apr64° / 45°4.811.80.3135.4
May74° / 56°4.712.7014.16.3
Jun82° / 65°4.211.2014.75.9
Jul85° / 68°3.710.7014.55.4
Aug83° / 65°3.08.5013.56.0
Sep78° / 58°2.97.2012.37.3
Oct65° / 46°3.38.20.1116.2
Nov52° / 36°3.58.30.79.82.8
Dec41° / 27°2.78.92.99.30.2

Cloud cover in October

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% 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 45%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16535
26535
36436
46436
56337
66238
76139
86238
96139
106040
115941
125941
135743
145743
155644
165644
175446
185446
195347
205149
215149
225050
234852
244852
254852
264654
274555
284555
294456
304456
314456

Chance of precipitation in October

Any precipitation

Mattoon gets around 3.3 in of rain and snow over 8.2 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 26% and peaks near 29% on the wettest days, and about 0 day brings snow.

0%10%20%30%40%151015202531
Rain chance (%)
123
223
322
422
522
622
723
823
924
1025
1125
1226
1326
1426
1527
1627
1728
1828
1928
2029
2129
2229
2329
2429
2529
2628
2728
2828
2928
3028
3128

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 82% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
16914107
26914107
3721396
4721396
5721396
6741385
7751285
8761284
9771274
10791173
11791173
12811162
13821062
14841051
15841051
1685951
1787940
1887940
1987940
2087940
2188840
2288840
2388840
2489830
2589830
2689830
2789830
2889830
2989830
3089830
3191720

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
28light breeze
38light breeze
48light breeze
58light breeze
68light breeze
78light breeze
88light breeze
98light breeze
108light breeze
118light breeze
128light breeze
138light 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 18 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over October. Sunrise moves from 5:55 AM to 6:27 AM, and sunset from 5:30 PM to 4:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.65:555:30
211.55:565:29
311.55:575:27
411.55:585:25
511.45:595:24
611.46:005:22
711.36:015:21
811.36:025:19
911.26:035:17
1011.26:045:16
1111.26:055:14
1211.16:065:13
1311.16:075:11
1411.06:085:10
1511.06:095:08
1610.96:105:07
1710.96:115:05
1810.96:125:04
1910.86:135:03
2010.86:155:01
2110.76:165:00
2210.76:174:58
2310.76:184:57
2410.66:194:56
2510.66:204:55
2610.56:214:53
2710.56:224:52
2810.56:234:51
2910.46:254:50
3010.46:264:48
3110.36:274:47

Solar energy in October

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in October, about 3.39 kWh/m².

For context, solar energy here swings from a low near 1.79 kWh/m² to a high of 6.44 kWh/m² in June across the year — October's 3.39 kWh/m² falls in the middle.

012345151015202531
Solar energy (kWh/m²)Level
14.1Bright
24.1Bright
34.0Bright
44.0Moderate
53.9Moderate
63.9Moderate
73.8Moderate
83.8Moderate
93.7Moderate
103.7Moderate
113.6Moderate
123.6Moderate
133.5Moderate
143.5Moderate
153.4Moderate
163.4Moderate
173.4Moderate
183.3Moderate
193.3Moderate
203.2Moderate
213.2Moderate
223.1Moderate
233.1Moderate
243.0Moderate
253.0Moderate
262.9Moderate
272.9Moderate
282.9Moderate
292.8Moderate
302.8Moderate
312.7Moderate
Planning a trip in October

Is October a good time to visit Mattoon?

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

6.2
Sightseeing
3rd-best month of the year
2.7
Beach & pool
6th-best month of the year

October is a reasonable time to visit Mattoon for sightseeing.

What to pack for Mattoon in October

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

In October, Mattoon sees daytime highs around 65°F and nights near 46°F. Worth packing: rain gear. About 8 days see rain.

rain gear

UV index in Mattoon 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 Mattoon peaks around June 23 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 23 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJun 23UV 9Dec 23UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low

Air quality in Mattoon 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 Mattoon is worst in July — around 16 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (October, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodJul 1616 µg/m³Oct 218 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar13Moderate
Apr11Good
May14Moderate
Jun15Moderate
Jul16Moderate
Aug14Moderate
Sep11Good
Oct8Good
Nov8Good
Dec9Good
Location & terrain

Where is Mattoon?

Mattoon sits at 39.5°N, 88.4°W, 735 ft above sea level, in United States. The nearest listed city is Charleston, 11 mi away.

Topography around Mattoon

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

Within 2 miles, the terrain around Mattoon has only modest variations in elevation — a maximum elevation change of 75 ft around an average of 712 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 236 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 446 ft.

The land around Mattoon is covered by cropland (49%) within 2 miles, cropland (80%) within 10 miles, and cropland (76%) within 50 miles.

2 miles
75 ft
10 miles
236 ft
50 miles
446 ft
treesgrasslandcroplandartificial surfaceswater
October weather nearby: Charleston 11 mi · Decatur 40 mi · Urbana 44 mi · Champaign 44 mi · Terre Haute 51 mi · Danville 59 mi · Springfield 71 mi · Vincennes 71 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 Mattoon (39.4831°, -88.3728°, elevation 735 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).