10-day forecast for Harmon, IL: 36° to 68°, with precipitation expected on 0 days. The table below breaks each day into morning, afternoon, evening and overnight.
68°
Best day: Wednesday, October 21
55°
Worst day: Friday, October 16
Tap any day below to see morning, afternoon, evening and overnight.
Sat, 1755° / 36°0
Morning37°feels 37°
Afternoon54°feels 51°
Evening47°feels 45°
Overnight41°feels 37°
55 °
Harmon, Saturday, 17 October
Clear. High 55°, low 36°.
Pressure30.56 inHg
Wind4.8 mph SW
Humidity44%
Visibility6.2 mi
Dew point28°
Sun, 1862° / 42°0
Morning43°feels 38°
Afternoon61°feels 59°
Evening51°feels 49°
Overnight43°feels 39°
62 °
Harmon, Sunday, 18 October
Clear. High 62°, low 42°.
Pressure30.45 inHg
Wind13 mph SW
Humidity47%
Visibility6.2 mi
Dew point38°
Mon, 1964° / 42°0
Morning43°feels 43°
Afternoon64°feels 62°
Evening53°feels 51°
Overnight46°feels 42°
64 °
Harmon, Monday, 19 October
Mostly clear. High 64°, low 42°.
Pressure30.39 inHg
Wind4 mph S
Humidity50%
Visibility6.2 mi
Dew point42°
Tue, 2067° / 46°0
Morning49°feels 49°
Afternoon65°feels 63°
Evening57°feels 56°
Overnight48°feels 47°
67 °
Harmon, Tuesday, 20 October
Clear. High 67°, low 46°.
Pressure30.36 inHg
Wind4.5 mph SE
Humidity48%
Visibility6.2 mi
Dew point43°
Wed, 2168° / 51°0
Morning56°feels 54°
Afternoon66°feels 65°
Evening58°feels 57°
Overnight53°feels 52°
68 °
Harmon, Wednesday, 21 October
Mostly clear. High 68°, low 51°.
Pressure30.27 inHg
Wind7.1 mph SE
Humidity39%
Visibility—
Dew point40°
Thu, 2267° / 51°0.02
Morning55°feels 53°
Afternoon60°feels 59°
Evening60°feels 59°
Overnight60°feels 58°
67 °
Harmon, Thursday, 22 October
Light rain. High 67°, low 51°.
Pressure30.12 inHg
Wind8.4 mph S
Humidity70%
Visibility—
Dew point49°
Fri, 2362° / 48°0
Morning52°feels 49°
Afternoon60°feels 59°
Evening52°feels 50°
Overnight49°feels 45°
62 °
Harmon, Friday, 23 October
Clear. High 62°, low 48°.
Pressure30.27 inHg
Wind12.6 mph E
Humidity56%
Visibility—
Dew point44°
Sat, 2462° / 46°0
Morning50°feels 46°
Afternoon59°feels 57°
Evening55°feels 53°
Overnight51°feels 49°
62 °
Harmon, Saturday, 24 October
Overcast. High 62°, low 46°.
Pressure30.24 inHg
Wind12.4 mph SE
Humidity53%
Visibility—
Dew point41°
Sun, 2566° / 51°0
Morning55°feels 53°
Afternoon64°feels 62°
Evening57°feels 55°
Overnight54°feels 51°
66 °
Harmon, Sunday, 25 October
Overcast. High 66°, low 51°.
Pressure30.18 inHg
Wind8.9 mph S
Humidity45%
Visibility—
Dew point41°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Harmon, IL around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.