As of 10:14 CDT

Weather in Fairfield, IL

68°

Fairfield, Sunday, 11 October, 10:14

Clear. Feels like 67°. High 82°, low 57°.

Pressure30.03 inHg

Wind5.7 mph NW

Humidity64%

Visibility6.2 mi

Dew point56°

See detailed hourly forecast

Mon, 1288° / 62°

88 °

Fairfield, Monday, 12 October

Clear. High 88°, low 62°.

Pressure29.97 inHg

Wind11.1 mph SW

Humidity45%

Visibility6.2 mi

Dew point60°

Tue, 1388° / 68°

88 °

Fairfield, Tuesday, 13 October

Clear. High 88°, low 68°.

Pressure29.94 inHg

Wind11.2 mph SW

Humidity46%

Visibility6.2 mi

Dew point62°

Wed, 1479° / 72°

0.13

79 °

Fairfield, Wednesday, 14 October

Light rain. High 79°, low 72°.

Pressure30.03 inHg

Wind6.7 mph SW

Humidity93%

Visibility2.1 mi

Dew point72°

Thu, 1581° / 70°

0.07

81 °

Fairfield, Thursday, 15 October

Light rain. High 81°, low 70°.

Pressure30.03 inHg

Wind11.4 mph SW

Humidity73%

Visibility—

Dew point70°

Fri, 1674° / 55°

0.03

74 °

Fairfield, Friday, 16 October

Light rain. High 74°, low 55°.

Pressure30.27 inHg

Wind19.1 mph NW

Humidity42%

Visibility—

Dew point42°

Sat, 1750° / 36°

50 °

Fairfield, Saturday, 17 October

Clear. High 50°, low 36°.

Pressure30.53 inHg

Wind14.8 mph N

Humidity23%

Visibility—

Dew point10°

Sun, 1856° / 32°

56 °

Fairfield, Sunday, 18 October

Clear. High 56°, low 32°.

Pressure30.59 inHg

Wind10.7 mph S

Humidity22%

Visibility—

Dew point12°

Mon, 1967° / 37°

67 °

Fairfield, Monday, 19 October

Clear. High 67°, low 37°.

Pressure30.45 inHg

Wind12.8 mph SW

Humidity18%

Visibility—

Dew point17°

Tue, 2070° / 43°

70 °

Fairfield, Tuesday, 20 October

Partly cloudy. High 70°, low 43°.

Pressure30.36 inHg

Wind7.6 mph S

Humidity21%

Visibility—

Dew point24°

Wed, 2173° / 50°

73 °

Fairfield, Wednesday, 21 October

Overcast. High 73°, low 50°.

Pressure30.27 inHg

Wind7.7 mph S

Humidity25%

Visibility—

Dew point31°

Thu, 2276° / 50°

76 °

Fairfield, Thursday, 22 October

Clear. High 76°, low 50°.

Pressure30.24 inHg

Wind6.7 mph S

Humidity24%

Visibility—

Dew point32°

Fri, 2378° / 54°

78 °

Fairfield, Friday, 23 October

Clear. High 78°, low 54°.

Pressure30.18 inHg

Wind5.7 mph S

Humidity25%

Visibility—

Dew point35°

Sat, 2480° / 57°

80 °

Fairfield, Saturday, 24 October

Clear. High 80°, low 57°.

Pressure30.12 inHg

Wind6.1 mph NW

Humidity38%

Visibility—

Dew point48°

Sun, 2578° / 64°

0.08

78 °

Fairfield, Sunday, 25 October

Light rain. High 78°, low 64°.

Pressure29.97 inHg

Wind16.6 mph W

Humidity46%

Visibility—

Dew point54°

Mon, 2663° / 47°

0.05

63 °

Fairfield, Monday, 26 October

Light rain. High 63°, low 47°.

Pressure29.94 inHg

Wind15.5 mph NW

Humidity43%

Visibility—

Dew point33°

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 Fairfield, 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 Fairfield, 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.