Monthly outlook for Mattoon, WI: average high 59.6°, average low 42°. That is 3.4° above the climate normal for October. Precipitation is expected on 3 days (about 0.6 inches), against a normal of 5 days and 1.6 inches. The warmest day looks like 10 October (77.5°), the coolest 18 October (31°).
59.6°/42°
Average high / low
+3.4°
Above normal
3 / 5
Wet days / normal
0.6 in
Precipitation this month
Ten-day blocks vs climate normal
Period
Forecast high
Normal
Difference
8 October – 17 October
63.2°
54.9°
+4.6°
18 October – 27 October
53.8°
50.6°
+1.7°
28 October – 6 November
at normal
46.1°
—
October records over 66 years
82.6°1 October 2023All-time high
14.4°24 October 2020All-time low
Climate normals and records are computed from the nearest reference point — Antigo (11 mi).
Fri, 0969° / 38°0
69 °
Mattoon, Friday, 9 October
Partly cloudy. High 69°, low 38°.
Pressure30.12 inHg
Wind5.6 mph SE
Humidity41%
Visibility6.2 mi
Dew point38°
Sat, 1078° / 49°0
78 °
Mattoon, Saturday, 10 October
Clear. High 78°, low 49°.
Pressure29.97 inHg
Wind11.1 mph S
Humidity55%
Visibility6.2 mi
Dew point55°
Sun, 1175° / 54°0
75 °
Mattoon, Sunday, 11 October
Clear. High 75°, low 54°.
Pressure29.91 inHg
Wind8.1 mph S
Humidity51%
Visibility6.2 mi
Dew point52°
Mon, 1277° / 55°0.19
77 °
Mattoon, Monday, 12 October
Rain. High 77°, low 55°.
Pressure29.71 inHg
Wind5.1 mph W
Humidity64%
Visibility6.2 mi
Dew point60°
Tue, 1354° / 50°0.07
54 °
Mattoon, Tuesday, 13 October
Light rain. High 54°, low 50°.
Pressure29.94 inHg
Wind9.1 mph NE
Humidity73%
Visibility—
Dew point45°
Wed, 1456° / 46°0
56 °
Mattoon, Wednesday, 14 October
Overcast. High 56°, low 46°.
Pressure30.18 inHg
Wind8.8 mph E
Humidity57%
Visibility—
Dew point38°
Thu, 1559° / 46°0.3
59 °
Mattoon, Thursday, 15 October
Rain. High 59°, low 46°.
Pressure29.80 inHg
Wind15.1 mph SW
Humidity97%
Visibility—
Dew point50°
Fri, 1653° / 43°0
53 °
Mattoon, Friday, 16 October
Overcast. High 53°, low 43°.
Pressure30.03 inHg
Wind17.2 mph W
Humidity66%
Visibility—
Dew point36°
Sat, 1747° / 34°0
47 °
Mattoon, Saturday, 17 October
Mostly clear. High 47°, low 34°.
Pressure30.47 inHg
Wind14 mph NW
Humidity38%
Visibility—
Dew point20°
Sun, 1851° / 31°0
51 °
Mattoon, Sunday, 18 October
Overcast. High 51°, low 31°.
Pressure30.39 inHg
Wind12.5 mph SW
Humidity39%
Visibility—
Dew point22°
Mon, 1954° / 35°0
54 °
Mattoon, Monday, 19 October
Overcast. High 54°, low 35°.
Pressure30.53 inHg
Wind6.2 mph NE
Humidity37%
Visibility—
Dew point25°
Tue, 2049° / 39°0.02
49 °
Mattoon, Tuesday, 20 October
Light rain. High 49°, low 39°.
Pressure30.27 inHg
Wind9.3 mph S
Humidity76%
Visibility—
Dew point40°
Wed, 2162° / 39°0
62 °
Mattoon, Wednesday, 21 October
Overcast. High 62°, low 39°.
Pressure30.03 inHg
Wind9.8 mph W
Humidity60%
Visibility—
Dew point43°
Thu, 2255° / 39°0
55 °
Mattoon, Thursday, 22 October
Overcast. High 55°, low 39°.
Pressure30.24 inHg
Wind8.6 mph NW
Humidity41%
Visibility—
Dew point30°
Fri, 2351° / 34°0
51 °
Mattoon, Friday, 23 October
Clear. High 51°, low 34°.
Pressure30.36 inHg
Wind7.4 mph S
Humidity50%
Visibility—
Dew point29°
From day 17 onward the outlook is built from 60-year climate statistics
Sat, 2450° / 38°0.14
50 °
Mattoon, Saturday, 24 October
Climate normal for this date — 60-year average.
Average high50°
Average low38°
Average precipitation0.14 in
Chance of precipitation30%
Record high72° (1963)
Record low14° (2020)
Sun, 2550° / 37°0.07
50 °
Mattoon, Sunday, 25 October
Climate normal for this date — 60-year average.
Average high50°
Average low37°
Average precipitation0.07 in
Chance of precipitation28%
Record high71° (1989)
Record low23° (2020)
Mon, 2649° / 36°0.06
49 °
Mattoon, Monday, 26 October
Climate normal for this date — 60-year average.
Average high49°
Average low36°
Average precipitation0.06 in
Chance of precipitation25%
Record high72° (1989)
Record low20° (1962)
Tue, 2749° / 35°0.09
49 °
Mattoon, Tuesday, 27 October
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.09 in
Chance of precipitation32%
Record high67° (1989)
Record low19° (2020)
Wed, 2848° / 35°0.08
48 °
Mattoon, Wednesday, 28 October
Climate normal for this date — 60-year average.
Average high48°
Average low35°
Average precipitation0.08 in
Chance of precipitation25%
Record high64° (1974)
Record low19° (1967)
Thu, 2948° / 34°0.06
48 °
Mattoon, Thursday, 29 October
Climate normal for this date — 60-year average.
Average high48°
Average low34°
Average precipitation0.06 in
Chance of precipitation25%
Record high75° (2024)
Record low17° (1988)
Fri, 3049° / 35°0.07
49 °
Mattoon, Friday, 30 October
Climate normal for this date — 60-year average.
Average high49°
Average low35°
Average precipitation0.07 in
Chance of precipitation32%
Record high74° (2024)
Record low17° (1988)
Sat, 3147° / 35°0.08
47 °
Mattoon, Saturday, 31 October
Climate normal for this date — 60-year average.
Average high47°
Average low35°
Average precipitation0.08 in
Chance of precipitation32%
Record high62° (1971)
Record low20° (1996)
Sun, 0146° / 34°0.13
46 °
Mattoon, Sunday, 1 November
Climate normal for this date — 60-year average.
Average high46°
Average low34°
Average precipitation0.13 in
Chance of precipitation33%
Record high66° (1990)
Record low19° (2023)
Mon, 0245° / 33°0.07
45 °
Mattoon, Monday, 2 November
Climate normal for this date — 60-year average.
Average high45°
Average low33°
Average precipitation0.07 in
Chance of precipitation30%
Record high65° (2022)
Record low15° (1991)
Tue, 0345° / 32°0.05
45 °
Mattoon, Tuesday, 3 November
Climate normal for this date — 60-year average.
Average high45°
Average low32°
Average precipitation0.05 in
Chance of precipitation20%
Record high66° (1964)
Record low12° (1991)
Wed, 0444° / 32°0.07
44 °
Mattoon, Wednesday, 4 November
Climate normal for this date — 60-year average.
Average high44°
Average low32°
Average precipitation0.07 in
Chance of precipitation22%
Record high67° (2008)
Record low11° (1991)
Thu, 0544° / 32°0.09
44 °
Mattoon, Thursday, 5 November
Climate normal for this date — 60-year average.
Average high44°
Average low32°
Average precipitation0.09 in
Chance of precipitation33%
Record high64° (2016)
Record low14° (1991)
Fri, 0644° / 31°0.06
44 °
Mattoon, Friday, 6 November
Climate normal for this date — 60-year average.
Average high44°
Average low31°
Average precipitation0.06 in
Chance of precipitation27%
Record high66° (2020)
Record low6° (1991)
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Mattoon, WI are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Mattoon, WI since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.