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As of 18:15 CDT

Weather in Bethalto, IL

89°Current weather

Bethalto, Saturday, 8 August, 18:15

Clear. Feels like 100°. High 90°, low 70°.

Pressure30.00 inHg
Wind3 mph NW
Humidity65%
Visibility6.2 mi
Dew point76°
Sun, 0995° / 73°0Overcast
95 °Overcast

Bethalto, Sunday, 9 August

Overcast. High 95°, low 73°.

Pressure29.94 inHg
Wind13.9 mph S
Humidity61%
Visibility6.2 mi
Dew point74°
Mon, 1099° / 75°0Clear
99 °Clear

Bethalto, Monday, 10 August

Clear. High 99°, low 75°.

Pressure29.94 inHg
Wind11.7 mph SW
Humidity51%
Visibility6.2 mi
Dew point72°
Tue, 1197° / 77°0.02Light rain
97 °Light rain

Bethalto, Tuesday, 11 August

Light rain. High 97°, low 77°.

Pressure29.88 inHg
Wind6.4 mph W
Humidity55%
Visibility6.2 mi
Dew point71°
Wed, 1285° / 76°0.02Light rain
85 °Light rain

Bethalto, Wednesday, 12 August

Light rain. High 85°, low 76°.

Pressure29.85 inHg
Wind6.7 mph W
Humidity55%
Visibility6.2 mi
Dew point70°
Thu, 1381° / 70°0.57Rain
81 °Rain

Bethalto, Thursday, 13 August

Rain. High 81°, low 70°.

Pressure29.88 inHg
Wind9.3 mph SE
Humidity78%
Visibility—
Dew point72°
Fri, 1476° / 63°0.01Light rain
76 °Light rain

Bethalto, Friday, 14 August

Light rain. High 76°, low 63°.

Pressure30.15 inHg
Wind10.1 mph NE
Humidity52%
Visibility—
Dew point55°
Sat, 1577° / 57°0Overcast
77 °Overcast

Bethalto, Saturday, 15 August

Overcast. High 77°, low 57°.

Pressure30.27 inHg
Wind8.7 mph E
Humidity53%
Visibility—
Dew point54°
Sun, 1677° / 61°0.05Light rain
77 °Light rain

Bethalto, Sunday, 16 August

Light rain. High 77°, low 61°.

Pressure30.18 inHg
Wind12.7 mph S
Humidity69%
Visibility—
Dew point62°
Mon, 1794° / 71°0.22Light rain
94 °Light rain

Bethalto, Monday, 17 August

Light rain. High 94°, low 71°.

Pressure29.91 inHg
Wind15.1 mph S
Humidity56%
Visibility—
Dew point70°
Tue, 1887° / 73°0Overcast
87 °Overcast

Bethalto, Tuesday, 18 August

Overcast. High 87°, low 73°.

Pressure30.00 inHg
Wind9.9 mph NE
Humidity65%
Visibility—
Dew point71°
Wed, 1991° / 71°0Overcast
91 °Overcast

Bethalto, Wednesday, 19 August

Overcast. High 91°, low 71°.

Pressure29.91 inHg
Wind8.2 mph E
Humidity62%
Visibility—
Dew point71°
Thu, 2084° / 72°1.5Heavy rain
84 °Heavy rain

Bethalto, Thursday, 20 August

Heavy rain. High 84°, low 72°.

Pressure29.88 inHg
Wind8.5 mph N
Humidity70%
Visibility—
Dew point72°
Fri, 2182° / 69°0.05Light rain
82 °Light rain

Bethalto, Friday, 21 August

Light rain. High 82°, low 69°.

Pressure29.94 inHg
Wind8.3 mph NE
Humidity75%
Visibility—
Dew point68°
Sat, 2284° / 65°0Overcast
84 °Overcast

Bethalto, Saturday, 22 August

Overcast. High 84°, low 65°.

Pressure29.94 inHg
Wind12.5 mph NE
Humidity54%
Visibility—
Dew point62°
Sun, 2370° / 61°0.04Light rain
70 °Light rain

Bethalto, Sunday, 23 August

Light rain. High 70°, low 61°.

Pressure30.15 inHg
Wind13.1 mph NE
Humidity73%
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 Bethalto, 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 Bethalto, 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.