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As of 13:23 CDT

Weather in Alvan, IL

86°Current weather

Alvan, Saturday, 8 August, 13:23

Partly cloudy. Feels like 95°. High 87°, low 71°.

Pressure30.00 inHg
Wind9.6 mph NW
Humidity70%
Visibility6.2 mi
Dew point75°
Sun, 0991° / 69°0Partly cloudy
91 °Partly cloudy

Alvan, Sunday, 9 August

Partly cloudy. High 91°, low 69°.

Pressure29.97 inHg
Wind14.2 mph S
Humidity76%
Visibility6.2 mi
Dew point76°
Mon, 1088° / 72°0.21Rain
88 °Rain

Alvan, Monday, 10 August

Rain. High 88°, low 72°.

Pressure29.91 inHg
Wind12.6 mph SW
Humidity86%
Visibility6.2 mi
Dew point76°
Tue, 1188° / 71°0.15Rain
88 °Rain

Alvan, Tuesday, 11 August

Rain. High 88°, low 71°.

Pressure29.83 inHg
Wind12.7 mph S
Humidity80%
Visibility6.2 mi
Dew point74°
Wed, 1281° / 71°0.02Light rain
81 °Light rain

Alvan, Wednesday, 12 August

Light rain. High 81°, low 71°.

Pressure29.85 inHg
Wind5.2 mph W
Humidity84%
Visibility6.2 mi
Dew point71°
Thu, 1371° / 58°0.73Heavy rain
71 °Heavy rain

Alvan, Thursday, 13 August

Heavy rain. High 71°, low 58°.

Pressure29.85 inHg
Wind14.1 mph NE
Humidity97%
Visibility—
Dew point66°
Fri, 1473° / 54°0Clear
73 °Clear

Alvan, Friday, 14 August

Clear. High 73°, low 54°.

Pressure30.18 inHg
Wind5 mph N
Humidity62%
Visibility—
Dew point55°
Sat, 1575° / 56°0Overcast
75 °Overcast

Alvan, Saturday, 15 August

Overcast. High 75°, low 56°.

Pressure30.21 inHg
Wind5 mph SE
Humidity68%
Visibility—
Dew point60°
Sun, 1668° / 59°0.13Light rain
68 °Light rain

Alvan, Sunday, 16 August

Light rain. High 68°, low 59°.

Pressure30.15 inHg
Wind8.1 mph E
Humidity94%
Visibility—
Dew point62°
Mon, 1772° / 63°0.07Light rain
72 °Light rain

Alvan, Monday, 17 August

Light rain. High 72°, low 63°.

Pressure29.97 inHg
Wind7.6 mph E
Humidity96%
Visibility—
Dew point67°
Tue, 1881° / 68°0.09Light rain
81 °Light rain

Alvan, Tuesday, 18 August

Light rain. High 81°, low 68°.

Pressure29.91 inHg
Wind7.7 mph W
Humidity76%
Visibility—
Dew point70°
Wed, 1981° / 65°0.04Light rain
81 °Light rain

Alvan, Wednesday, 19 August

Light rain. High 81°, low 65°.

Pressure29.91 inHg
Wind14.4 mph N
Humidity72%
Visibility—
Dew point69°
Thu, 2069° / 53°0Mostly clear
69 °Mostly clear

Alvan, Thursday, 20 August

Mostly clear. High 69°, low 53°.

Pressure30.21 inHg
Wind14.5 mph N
Humidity60%
Visibility—
Dew point51°
Fri, 2170° / 48°0Mostly clear
70 °Mostly clear

Alvan, Friday, 21 August

Mostly clear. High 70°, low 48°.

Pressure30.24 inHg
Wind6.8 mph N
Humidity60%
Visibility—
Dew point51°
Sat, 2272° / 52°0Partly cloudy
72 °Partly cloudy

Alvan, Saturday, 22 August

Partly cloudy. High 72°, low 52°.

Pressure30.15 inHg
Wind4.4 mph W
Humidity59%
Visibility—
Dew point53°
Sun, 2375° / 54°0Clear
75 °Clear

Alvan, Sunday, 23 August

Clear. High 75°, low 54°.

Pressure30.12 inHg
Wind5.3 mph SW
Humidity59%
Visibility—
Dew point55°

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 Alvan, 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 Alvan, 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.