As of 01:01 CDT

Weather in Waltham, IL

56°

Waltham, Friday, 9 October, 01:01

Overcast. Feels like 55°. High 75°, low 53°.

Pressure30.09 inHg

Wind3.5 mph E

Humidity77%

Visibility6.2 mi

Dew point49°

See detailed hourly forecast

Sat, 1079° / 57°

79 °

Waltham, Saturday, 10 October

Overcast. High 79°, low 57°.

Pressure30.09 inHg

Wind7.5 mph SE

Humidity55%

Visibility6.2 mi

Dew point55°

Sun, 1172° / 55°

72 °

Waltham, Sunday, 11 October

Clear. High 72°, low 55°.

Pressure29.94 inHg

Wind1.5 mph NE

Humidity69%

Visibility6.2 mi

Dew point58°

Mon, 1282° / 58°

82 °

Waltham, Monday, 12 October

Clear. High 82°, low 58°.

Pressure29.83 inHg

Wind10 mph SW

Humidity57%

Visibility6.2 mi

Dew point61°

Tue, 1375° / 63°

75 °

Waltham, Tuesday, 13 October

Overcast. High 75°, low 63°.

Pressure29.85 inHg

Wind11.1 mph NW

Humidity69%

Visibility—

Dew point64°

Wed, 1467° / 56°

0.04

67 °

Waltham, Wednesday, 14 October

Light rain. High 67°, low 56°.

Pressure30.06 inHg

Wind11.6 mph E

Humidity61%

Visibility—

Dew point50°

Thu, 1580° / 56°

0.6

80 °

Waltham, Thursday, 15 October

Rain. High 80°, low 56°.

Pressure29.77 inHg

Wind15.6 mph SW

Humidity68%

Visibility—

Dew point66°

Fri, 1663° / 49°

63 °

Waltham, Friday, 16 October

Overcast. High 63°, low 49°.

Pressure30.12 inHg

Wind15.2 mph NW

Humidity66%

Visibility—

Dew point44°

Sat, 1750° / 40°

50 °

Waltham, Saturday, 17 October

Clear. High 50°, low 40°.

Pressure30.50 inHg

Wind15.2 mph N

Humidity47%

Visibility—

Dew point28°

Sun, 1852° / 38°

52 °

Waltham, Sunday, 18 October

Overcast. High 52°, low 38°.

Pressure30.50 inHg

Wind4 mph NE

Humidity50%

Visibility—

Dew point31°

Mon, 1956° / 39°

56 °

Waltham, Monday, 19 October

Overcast. High 56°, low 39°.

Pressure30.50 inHg

Wind7.4 mph E

Humidity46%

Visibility—

Dew point32°

Tue, 2051° / 47°

51 °

Waltham, Tuesday, 20 October

Light rain. High 51°, low 47°.

Pressure30.33 inHg

Wind7.3 mph S

Humidity60%

Visibility—

Dew point37°

Wed, 2166° / 45°

66 °

Waltham, Wednesday, 21 October

Clear. High 66°, low 45°.

Pressure30.15 inHg

Wind10.4 mph SW

Humidity63%

Visibility—

Dew point48°

Thu, 2264° / 50°

64 °

Waltham, Thursday, 22 October

Clear. High 64°, low 50°.

Pressure30.18 inHg

Wind9.4 mph N

Humidity54%

Visibility—

Dew point45°

Fri, 2357° / 46°

57 °

Waltham, Friday, 23 October

Mostly clear. High 57°, low 46°.

Pressure30.33 inHg

Wind10.6 mph NE

Humidity52%

Visibility—

Dew point38°

Sat, 2459° / 41°

59 °

Waltham, Saturday, 24 October

Clear. High 59°, low 41°.

Pressure30.18 inHg

Wind14.9 mph SW

Humidity45%

Visibility—

Dew point36°

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 Waltham, 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 Waltham, 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.