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As of 15:44 CDT

Weather in Waltham, IL

80°Current weather

Waltham, Saturday, 8 August, 15:44

Clear. Feels like 80°. High 81°, low 68°.

Pressure30.00 inHg
Wind5.5 mph NW
Humidity60%
Visibility6.2 mi
Dew point65°
Sun, 0986° / 64°0.37Rain
86 °Rain

Waltham, Sunday, 9 August

Rain. High 86°, low 64°.

Pressure29.91 inHg
Wind5.5 mph SE
Humidity94%
Visibility6.2 mi
Dew point74°
Mon, 1087° / 71°0.01Light rain
87 °Light rain

Waltham, Monday, 10 August

Light rain. High 87°, low 71°.

Pressure29.91 inHg
Wind7.2 mph SW
Humidity78%
Visibility6.2 mi
Dew point74°
Tue, 1187° / 72°0.03Light rain
87 °Light rain

Waltham, Tuesday, 11 August

Light rain. High 87°, low 72°.

Pressure29.77 inHg
Wind11.1 mph SW
Humidity79%
Visibility6.2 mi
Dew point73°
Wed, 1278° / 67°0.03Light rain
78 °Light rain

Waltham, Wednesday, 12 August

Light rain. High 78°, low 67°.

Pressure29.85 inHg
Wind5.7 mph E
Humidity90%
Visibility6.2 mi
Dew point69°
Thu, 1373° / 60°0.01Light rain
73 °Light rain

Waltham, Thursday, 13 August

Light rain. High 73°, low 60°.

Pressure29.94 inHg
Wind13.2 mph E
Humidity75%
Visibility—
Dew point63°
Fri, 1473° / 54°0Clear
73 °Clear

Waltham, Friday, 14 August

Clear. High 73°, low 54°.

Pressure30.18 inHg
Wind6.9 mph NE
Humidity67%
Visibility—
Dew point58°
Sat, 1573° / 54°0Overcast
73 °Overcast

Waltham, Saturday, 15 August

Overcast. High 73°, low 54°.

Pressure30.33 inHg
Wind6.2 mph SE
Humidity64%
Visibility—
Dew point56°
Sun, 1676° / 56°0Overcast
76 °Overcast

Waltham, Sunday, 16 August

Overcast. High 76°, low 56°.

Pressure30.18 inHg
Wind10.4 mph S
Humidity69%
Visibility—
Dew point61°
Mon, 1779° / 65°0Light rain
79 °Light rain

Waltham, Monday, 17 August

Light rain. High 79°, low 65°.

Pressure29.97 inHg
Wind6.7 mph S
Humidity84%
Visibility—
Dew point71°
Tue, 1881° / 69°0.02Light rain
81 °Light rain

Waltham, Tuesday, 18 August

Light rain. High 81°, low 69°.

Pressure30.03 inHg
Wind7.7 mph E
Humidity78%
Visibility—
Dew point71°
Wed, 1982° / 64°0.23Light rain
82 °Light rain

Waltham, Wednesday, 19 August

Light rain. High 82°, low 64°.

Pressure29.91 inHg
Wind8.6 mph S
Humidity75%
Visibility—
Dew point71°
Thu, 2075° / 66°0.12Light rain
75 °Light rain

Waltham, Thursday, 20 August

Light rain. High 75°, low 66°.

Pressure29.91 inHg
Wind8.9 mph N
Humidity81%
Visibility—
Dew point67°
Fri, 2179° / 61°0.01Light rain
79 °Light rain

Waltham, Friday, 21 August

Light rain. High 79°, low 61°.

Pressure29.97 inHg
Wind6.2 mph NE
Humidity65%
Visibility—
Dew point62°
Sat, 2278° / 57°0Partly cloudy
78 °Partly cloudy

Waltham, Saturday, 22 August

Partly cloudy. High 78°, low 57°.

Pressure29.94 inHg
Wind16.4 mph NE
Humidity70%
Visibility—
Dew point65°
Sun, 2367° / 48°0Clear
67 °Clear

Waltham, Sunday, 23 August

Clear. High 67°, low 48°.

Pressure30.24 inHg
Wind11.8 mph E
Humidity56%
Visibility—
Dew point47°

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.