As of 04:18 CDT

Weather in Teheran, IL

41°

Teheran, Sunday, 18 October, 04:18

Clear. Feels like 36°. High 65°, low 40°.

Pressure30.45 inHg

Wind7.1 mph S

Humidity100%

Visibility6.2 mi

Dew point40°

See detailed hourly forecast

Mon, 1967° / 42°

67 °

Teheran, Monday, 19 October

Clear. High 67°, low 42°.

Pressure30.39 inHg

Wind3.5 mph S

Humidity52%

Visibility6.2 mi

Dew point45°

Tue, 2068° / 43°

68 °

Teheran, Tuesday, 20 October

Clear. High 68°, low 43°.

Pressure30.39 inHg

Wind3.2 mph SE

Humidity49%

Visibility6.2 mi

Dew point46°

Wed, 2170° / 44°

70 °

Teheran, Wednesday, 21 October

Clear. High 70°, low 44°.

Pressure30.30 inHg

Wind2.6 mph S

Humidity50%

Visibility6.2 mi

Dew point48°

Thu, 2271° / 49°

71 °

Teheran, Thursday, 22 October

Clear. High 71°, low 49°.

Pressure30.27 inHg

Wind6.3 mph E

Humidity47%

Visibility—

Dew point46°

Fri, 2369° / 51°

69 °

Teheran, Friday, 23 October

Clear. High 69°, low 51°.

Pressure30.30 inHg

Wind9.4 mph SE

Humidity49%

Visibility—

Dew point46°

Sat, 2478° / 59°

78 °

Teheran, Saturday, 24 October

Overcast. High 78°, low 59°.

Pressure30.21 inHg

Wind14.2 mph S

Humidity24%

Visibility—

Dew point35°

Sun, 2563° / 49°

0.05

63 °

Teheran, Sunday, 25 October

Light rain. High 63°, low 49°.

Pressure30.45 inHg

Wind12.2 mph N

Humidity42%

Visibility—

Dew point34°

Mon, 2658° / 43°

0.01

58 °

Teheran, Monday, 26 October

Light rain. High 58°, low 43°.

Pressure30.36 inHg

Wind7.5 mph S

Humidity28%

Visibility—

Dew point23°

Tue, 2771° / 51°

71 °

Teheran, Tuesday, 27 October

Overcast. High 71°, low 51°.

Pressure30.15 inHg

Wind7.2 mph S

Humidity46%

Visibility—

Dew point45°

Wed, 2873° / 58°

73 °

Teheran, Wednesday, 28 October

Overcast. High 73°, low 58°.

Pressure29.97 inHg

Wind11.7 mph SW

Humidity38%

Visibility—

Dew point44°

Thu, 2971° / 59°

71 °

Teheran, Thursday, 29 October

Overcast. High 71°, low 59°.

Pressure29.77 inHg

Wind6.6 mph S

Humidity60%

Visibility—

Dew point53°

Fri, 3076° / 55°

76 °

Teheran, Friday, 30 October

Clear. High 76°, low 55°.

Pressure29.80 inHg

Wind13.8 mph SW

Humidity47%

Visibility—

Dew point49°

Sat, 3179° / 61°

0.2

79 °

Teheran, Saturday, 31 October

Rain. High 79°, low 61°.

Pressure29.77 inHg

Wind14.4 mph SW

Humidity57%

Visibility—

Dew point58°

Sun, 0183° / 63°

83 °

Teheran, Sunday, 1 November

Partly cloudy. High 83°, low 63°.

Pressure29.94 inHg

Wind14.6 mph SW

Humidity49%

Visibility—

Dew point56°

Mon, 0273° / 61°

73 °

Teheran, Monday, 2 November

Overcast. High 73°, low 61°.

Pressure30.18 inHg

Wind13.2 mph NE

Humidity35%

Visibility—

Dew point42°

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 Teheran, 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 Teheran, 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.