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As of 20:55 CDT

Weather in Petrolia, IL

46°Current weather

Petrolia, Saturday, 17 October, 20:55

Clear. Feels like 46°. High 58°, low 42°.

Pressure30.47 inHg
Wind0 mph N
Humidity76%
Visibility6.2 mi
Dew point39°
Sun, 1863° / 38°0Clear
63 °Clear

Petrolia, Sunday, 18 October

Clear. High 63°, low 38°.

Pressure30.50 inHg
Wind6.8 mph S
Humidity44%
Visibility6.2 mi
Dew point37°
Mon, 1967° / 41°0Clear
67 °Clear

Petrolia, Monday, 19 October

Clear. High 67°, low 41°.

Pressure30.39 inHg
Wind0.5 mph N
Humidity44%
Visibility6.2 mi
Dew point42°
Tue, 2070° / 43°0Mostly clear
70 °Mostly clear

Petrolia, Tuesday, 20 October

Mostly clear. High 70°, low 43°.

Pressure30.39 inHg
Wind2.9 mph E
Humidity44%
Visibility6.2 mi
Dew point44°
Wed, 2171° / 45°0Clear
71 °Clear

Petrolia, Wednesday, 21 October

Clear. High 71°, low 45°.

Pressure30.30 inHg
Wind1.1 mph SE
Humidity46%
Visibility6.2 mi
Dew point45°
Thu, 2271° / 46°0Clear
71 °Clear

Petrolia, Thursday, 22 October

Clear. High 71°, low 46°.

Pressure30.24 inHg
Wind5.1 mph NE
Humidity42%
Visibility—
Dew point43°
Fri, 2372° / 51°0Clear
72 °Clear

Petrolia, Friday, 23 October

Clear. High 72°, low 51°.

Pressure30.30 inHg
Wind7.7 mph E
Humidity42%
Visibility—
Dew point43°
Sat, 2474° / 52°0Overcast
74 °Overcast

Petrolia, Saturday, 24 October

Overcast. High 74°, low 52°.

Pressure30.30 inHg
Wind8.8 mph S
Humidity28%
Visibility—
Dew point35°
Sun, 2573° / 52°0Overcast
73 °Overcast

Petrolia, Sunday, 25 October

Overcast. High 73°, low 52°.

Pressure30.33 inHg
Wind11.7 mph NW
Humidity36%
Visibility—
Dew point42°
Mon, 2663° / 47°0Overcast
63 °Overcast

Petrolia, Monday, 26 October

Overcast. High 63°, low 47°.

Pressure30.39 inHg
Wind9.4 mph N
Humidity33%
Visibility—
Dew point29°
Tue, 2765° / 43°0Overcast
65 °Overcast

Petrolia, Tuesday, 27 October

Overcast. High 65°, low 43°.

Pressure30.33 inHg
Wind5.4 mph NE
Humidity31%
Visibility—
Dew point29°
Wed, 2862° / 51°0Overcast
62 °Overcast

Petrolia, Wednesday, 28 October

Overcast. High 62°, low 51°.

Pressure30.21 inHg
Wind9.1 mph SE
Humidity47%
Visibility—
Dew point39°
Thu, 2981° / 61°0.12Light rain
81 °Light rain

Petrolia, Thursday, 29 October

Light rain. High 81°, low 61°.

Pressure29.94 inHg
Wind20.6 mph SW
Humidity38%
Visibility—
Dew point49°
Fri, 3069° / 61°0.16Light rain
69 °Light rain

Petrolia, Friday, 30 October

Light rain. High 69°, low 61°.

Pressure29.97 inHg
Wind10 mph SW
Humidity62%
Visibility—
Dew point55°
Sat, 3173° / 56°0.63Rain
73 °Rain

Petrolia, Saturday, 31 October

Rain. High 73°, low 56°.

Pressure30.00 inHg
Wind15.3 mph S
Humidity60%
Visibility—
Dew point56°
Sun, 0173° / 56°0.71Rain
73 °Rain

Petrolia, Sunday, 1 November

Rain. High 73°, low 56°.

Pressure29.91 inHg
Wind16.6 mph SW
Humidity75%
Visibility—
Dew point64°

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 Petrolia, 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 Petrolia, 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.