As of 00:44 CDT

Weather in Fullerton, IL

65°

Fullerton, Monday, 12 October, 00:44

Overcast. Feels like 65°. High 86°, low 62°.

Pressure29.94 inHg

Wind8.9 mph S

Humidity78%

Visibility6.2 mi

Dew point58°

See detailed hourly forecast

Tue, 1386° / 69°

86 °

Fullerton, Tuesday, 13 October

Partly cloudy. High 86°, low 69°.

Pressure29.88 inHg

Wind11.4 mph W

Humidity51%

Visibility6.2 mi

Dew point63°

Wed, 1478° / 66°

0.34

78 °

Fullerton, Wednesday, 14 October

Heavy rain. High 78°, low 66°.

Pressure30.03 inHg

Wind5.5 mph NE

Humidity70%

Visibility6.2 mi

Dew point65°

Thu, 1575° / 64°

0.59

75 °

Fullerton, Thursday, 15 October

Rain. High 75°, low 64°.

Pressure30.00 inHg

Wind5.2 mph S

Humidity94%

Visibility1.7 mi

Dew point69°

Fri, 1663° / 50°

0.09

63 °

Fullerton, Friday, 16 October

Light rain. High 63°, low 50°.

Pressure30.36 inHg

Wind20.4 mph N

Humidity42%

Visibility—

Dew point36°

Sat, 1758° / 41°

58 °

Fullerton, Saturday, 17 October

Clear. High 58°, low 41°.

Pressure30.50 inHg

Wind8.2 mph SE

Humidity42%

Visibility—

Dew point33°

Sun, 1863° / 35°

63 °

Fullerton, Sunday, 18 October

Clear. High 63°, low 35°.

Pressure30.42 inHg

Wind13.6 mph S

Humidity20%

Visibility—

Dew point15°

Mon, 1968° / 47°

68 °

Fullerton, Monday, 19 October

Overcast. High 68°, low 47°.

Pressure30.33 inHg

Wind14.5 mph S

Humidity43%

Visibility—

Dew point41°

Tue, 2074° / 56°

74 °

Fullerton, Tuesday, 20 October

Overcast. High 74°, low 56°.

Pressure30.18 inHg

Wind13.5 mph S

Humidity51%

Visibility—

Dew point51°

Wed, 2179° / 60°

0.17

79 °

Fullerton, Wednesday, 21 October

Rain. High 79°, low 60°.

Pressure30.00 inHg

Wind18.8 mph S

Humidity49%

Visibility—

Dew point55°

Thu, 2267° / 52°

0.81

67 °

Fullerton, Thursday, 22 October

Rain. High 67°, low 52°.

Pressure29.80 inHg

Wind22.1 mph S

Humidity54%

Visibility—

Dew point45°

Fri, 2351° / 46°

51 °

Fullerton, Friday, 23 October

Clear. High 51°, low 46°.

Pressure30.00 inHg

Wind17.6 mph NW

Humidity46%

Visibility—

Dew point31°

Sat, 2453° / 37°

53 °

Fullerton, Saturday, 24 October

Mostly clear. High 53°, low 37°.

Pressure30.15 inHg

Wind8.1 mph NW

Humidity39%

Visibility—

Dew point25°

Sun, 2557° / 48°

0.08

57 °

Fullerton, Sunday, 25 October

Light rain. High 57°, low 48°.

Pressure29.74 inHg

Wind14.6 mph SE

Humidity41%

Visibility—

Dew point32°

Mon, 2656° / 48°

56 °

Fullerton, Monday, 26 October

Partly cloudy. High 56°, low 48°.

Pressure30.00 inHg

Wind10.7 mph NE

Humidity62%

Visibility—

Dew point42°

Tue, 2756° / 45°

56 °

Fullerton, Tuesday, 27 October

Clear. High 56°, low 45°.

Pressure30.03 inHg

Wind13.8 mph NW

Humidity43%

Visibility—

Dew point32°

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 Fullerton, 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 Fullerton, 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.