10-day forecast for Cortland, IL: 57° to 88°, with precipitation expected on 3 days. The table below breaks each day into morning, afternoon, evening and overnight.
82°
Best day: Wednesday, August 12
83° · 0.54 in
Worst day: Sunday, August 9
Tap any day below to see morning, afternoon, evening and overnight.
Mon, 1088° / 70°0.29
Morning74°feels 76°
Afternoon87°feels 100°
Evening76°feels 78°
Overnight76°feels 77°
88 °
Cortland, Monday, 10 August
Rain. High 88°, low 70°.
Pressure29.88 inHg
Wind5.6 mph NE
Humidity87%
Visibility6.2 mi
Dew point75°
Tue, 1180° / 68°0.13
Morning72°feels 74°
Afternoon74°feels 76°
Evening75°feels 77°
Overnight68°feels 69°
80 °
Cortland, Tuesday, 11 August
Light rain. High 80°, low 68°.
Pressure29.77 inHg
Wind10.9 mph SE
Humidity91%
Visibility6.2 mi
Dew point71°
Wed, 1282° / 67°0.01
Morning72°feels 73°
Afternoon81°feels 86°
Evening70°feels 71°
Overnight70°feels 71°
82 °
Cortland, Wednesday, 12 August
Light rain. High 82°, low 67°.
Pressure29.85 inHg
Wind4.7 mph W
Humidity75%
Visibility6.2 mi
Dew point71°
Thu, 1374° / 61°0.01
Morning65°feels 65°
Afternoon73°feels 73°
Evening66°feels 66°
Overnight64°feels 64°
74 °
Cortland, Thursday, 13 August
Light rain. High 74°, low 61°.
Pressure30.03 inHg
Wind9.2 mph E
Humidity67%
Visibility—
Dew point61°
Fri, 1473° / 57°0
Morning61°feels 61°
Afternoon71°feels 71°
Evening64°feels 64°
Overnight60°feels 59°
73 °
Cortland, Friday, 14 August
Overcast. High 73°, low 57°.
Pressure30.15 inHg
Wind9.7 mph NE
Humidity57%
Visibility—
Dew point55°
Sat, 1574° / 60°0.02
Morning63°feels 62°
Afternoon71°feels 71°
Evening69°feels 69°
Overnight66°feels 66°
74 °
Cortland, Saturday, 15 August
Light rain. High 74°, low 60°.
Pressure30.24 inHg
Wind9.2 mph SE
Humidity71%
Visibility—
Dew point60°
Sun, 1672° / 62°0.01
Morning65°feels 65°
Afternoon72°feels 73°
Evening72°feels 73°
Overnight67°feels 68°
72 °
Cortland, Sunday, 16 August
Light rain. High 72°, low 62°.
Pressure30.09 inHg
Wind6.7 mph SE
Humidity80%
Visibility—
Dew point64°
Mon, 1779° / 64°0.01
Morning68°feels 69°
Afternoon77°feels 78°
Evening73°feels 73°
Overnight65°feels 65°
79 °
Cortland, Monday, 17 August
Light rain. High 79°, low 64°.
Pressure30.09 inHg
Wind7.5 mph E
Humidity71%
Visibility—
Dew point66°
Tue, 1876° / 62°0
Morning65°feels 66°
Afternoon72°feels 73°
Evening74°feels 75°
Overnight68°feels 69°
76 °
Cortland, Tuesday, 18 August
Overcast. High 76°, low 62°.
Pressure30.03 inHg
Wind8.6 mph S
Humidity86%
Visibility—
Dew point66°
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 Cortland, 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.