As of 02:48 CDT

Weather in Derby, IL

62°

Derby, Sunday, 11 October, 02:48

Overcast. Feels like 62°. High 82°, low 56°.

Pressure29.94 inHg

Wind6 mph N

Humidity91%

Visibility6.2 mi

Dew point59°

See detailed hourly forecast

Mon, 1288° / 60°

88 °

Derby, Monday, 12 October

Mostly clear. High 88°, low 60°.

Pressure30.00 inHg

Wind9.8 mph SW

Humidity48%

Visibility6.2 mi

Dew point62°

Tue, 1387° / 67°

87 °

Derby, Tuesday, 13 October

Clear. High 87°, low 67°.

Pressure29.97 inHg

Wind10.1 mph SW

Humidity44%

Visibility6.2 mi

Dew point60°

Wed, 1478° / 71°

0.14

78 °

Derby, Wednesday, 14 October

Light rain. High 78°, low 71°.

Pressure30.03 inHg

Wind7.5 mph SW

Humidity94%

Visibility4.0 mi

Dew point70°

Thu, 1574° / 66°

0.6

74 °

Derby, Thursday, 15 October

Rain. High 74°, low 66°.

Pressure30.12 inHg

Wind9 mph NE

Humidity87%

Visibility—

Dew point69°

Fri, 1667° / 48°

0.09

67 °

Derby, Friday, 16 October

Light rain. High 67°, low 48°.

Pressure30.24 inHg

Wind16.1 mph NW

Humidity57%

Visibility—

Dew point51°

Sat, 1747° / 36°

47 °

Derby, Saturday, 17 October

Overcast. High 47°, low 36°.

Pressure30.45 inHg

Wind16.6 mph NW

Humidity42%

Visibility—

Dew point22°

Sun, 1853° / 30°

53 °

Derby, Sunday, 18 October

Clear. High 53°, low 30°.

Pressure30.65 inHg

Wind7.5 mph N

Humidity33%

Visibility—

Dew point20°

Mon, 1961° / 34°

61 °

Derby, Monday, 19 October

Clear. High 61°, low 34°.

Pressure30.53 inHg

Wind5.5 mph S

Humidity22%

Visibility—

Dew point17°

Tue, 2067° / 39°

67 °

Derby, Tuesday, 20 October

Clear. High 67°, low 39°.

Pressure30.39 inHg

Wind6.3 mph SW

Humidity26%

Visibility—

Dew point26°

Wed, 2171° / 43°

71 °

Derby, Wednesday, 21 October

Clear. High 71°, low 43°.

Pressure30.24 inHg

Wind10.2 mph SW

Humidity24%

Visibility—

Dew point28°

Thu, 2275° / 46°

75 °

Derby, Thursday, 22 October

Clear. High 75°, low 46°.

Pressure30.15 inHg

Wind8.7 mph W

Humidity33%

Visibility—

Dew point39°

Fri, 2368° / 47°

68 °

Derby, Friday, 23 October

Clear. High 68°, low 47°.

Pressure30.27 inHg

Wind6.7 mph N

Humidity37%

Visibility—

Dew point37°

Sat, 2464° / 45°

64 °

Derby, Saturday, 24 October

Partly cloudy. High 64°, low 45°.

Pressure30.30 inHg

Wind7.9 mph E

Humidity40%

Visibility—

Dew point37°

Sun, 2568° / 49°

0.01

68 °

Derby, Sunday, 25 October

Light rain. High 68°, low 49°.

Pressure30.27 inHg

Wind7.6 mph E

Humidity39%

Visibility—

Dew point36°

Mon, 2678° / 52°

78 °

Derby, Monday, 26 October

Partly cloudy. High 78°, low 52°.

Pressure30.21 inHg

Wind12.8 mph SW

Humidity33%

Visibility—

Dew point43°

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 Derby, IL 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 Derby, IL 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.