As of 01:12 CDT

Weather in Seneca, IL

63°

Seneca, Monday, 12 October, 01:12

Overcast. Feels like 63°. High 86°, low 62°.

Pressure29.88 inHg

Wind7.2 mph SW

Humidity83%

Visibility6.2 mi

Dew point57°

See detailed hourly forecast

Tue, 1385° / 68°

0.01

85 °

Seneca, Tuesday, 13 October

Light rain. High 85°, low 68°.

Pressure29.83 inHg

Wind9.6 mph W

Humidity65%

Visibility6.2 mi

Dew point67°

Wed, 1473° / 61°

0.62

73 °

Seneca, Wednesday, 14 October

Heavy rain. High 73°, low 61°.

Pressure30.06 inHg

Wind5.2 mph NE

Humidity61%

Visibility6.2 mi

Dew point57°

Thu, 1565° / 60°

0.55

65 °

Seneca, Thursday, 15 October

Rain. High 65°, low 60°.

Pressure30.03 inHg

Wind6 mph E

Humidity96%

Visibility1.7 mi

Dew point62°

Fri, 1660° / 48°

0.07

60 °

Seneca, Friday, 16 October

Light rain. High 60°, low 48°.

Pressure30.36 inHg

Wind19.4 mph NW

Humidity47%

Visibility—

Dew point38°

Sat, 1757° / 40°

57 °

Seneca, Saturday, 17 October

Clear. High 57°, low 40°.

Pressure30.50 inHg

Wind8.9 mph S

Humidity42%

Visibility—

Dew point32°

Sun, 1860° / 37°

60 °

Seneca, Sunday, 18 October

Clear. High 60°, low 37°.

Pressure30.39 inHg

Wind16.7 mph SW

Humidity29%

Visibility—

Dew point22°

Mon, 1969° / 46°

69 °

Seneca, Monday, 19 October

Overcast. High 69°, low 46°.

Pressure30.30 inHg

Wind14.2 mph SW

Humidity41%

Visibility—

Dew point40°

Tue, 2073° / 55°

73 °

Seneca, Tuesday, 20 October

Overcast. High 73°, low 55°.

Pressure30.15 inHg

Wind11.3 mph S

Humidity53%

Visibility—

Dew point51°

Wed, 2177° / 61°

0.03

77 °

Seneca, Wednesday, 21 October

Light rain. High 77°, low 61°.

Pressure30.00 inHg

Wind20.8 mph S

Humidity56%

Visibility—

Dew point58°

Thu, 2267° / 52°

0.66

67 °

Seneca, Thursday, 22 October

Rain. High 67°, low 52°.

Pressure29.77 inHg

Wind22.1 mph S

Humidity57%

Visibility—

Dew point45°

Fri, 2350° / 43°

50 °

Seneca, Friday, 23 October

Mostly clear. High 50°, low 43°.

Pressure30.00 inHg

Wind17.3 mph NW

Humidity53%

Visibility—

Dew point31°

Sat, 2451° / 35°

51 °

Seneca, Saturday, 24 October

Mostly clear. High 51°, low 35°.

Pressure30.15 inHg

Wind10.2 mph NW

Humidity46%

Visibility—

Dew point27°

Sun, 2550° / 45°

0.24

50 °

Seneca, Sunday, 25 October

Light rain. High 50°, low 45°.

Pressure29.80 inHg

Wind12.5 mph E

Humidity62%

Visibility—

Dew point37°

Mon, 2655° / 47°

55 °

Seneca, Monday, 26 October

Overcast. High 55°, low 47°.

Pressure30.00 inHg

Wind8.1 mph NW

Humidity60%

Visibility—

Dew point40°

Tue, 2752° / 48°

0.02

52 °

Seneca, Tuesday, 27 October

Light rain. High 52°, low 48°.

Pressure30.00 inHg

Wind14.3 mph NW

Humidity54%

Visibility—

Dew point35°

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 Seneca, 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 Seneca, 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.