As of 15:04 CDT

Weather in Altmar, IL

80°

Altmar, Saturday, 10 October, 15:04

Overcast. Feels like 80°. High 80°, low 59°.

Pressure30.03 inHg

Wind2 mph S

Humidity42%

Visibility6.2 mi

Dew point54°

See detailed hourly forecast

Sun, 1177° / 55°

77 °

Altmar, Sunday, 11 October

Clear. High 77°, low 55°.

Pressure29.97 inHg

Wind3.6 mph S

Humidity57%

Visibility6.2 mi

Dew point55°

Mon, 1284° / 61°

84 °

Altmar, Monday, 12 October

Clear. High 84°, low 61°.

Pressure29.85 inHg

Wind11.9 mph SW

Humidity56%

Visibility6.2 mi

Dew point63°

Tue, 1380° / 66°

80 °

Altmar, Tuesday, 13 October

Clear. High 80°, low 66°.

Pressure29.83 inHg

Wind9.5 mph W

Humidity65%

Visibility6.2 mi

Dew point66°

Wed, 1471° / 57°

71 °

Altmar, Wednesday, 14 October

Overcast. High 71°, low 57°.

Pressure30.09 inHg

Wind7.9 mph NE

Humidity68%

Visibility6.2 mi

Dew point56°

Thu, 1562° / 53°

0.23

62 °

Altmar, Thursday, 15 October

Light rain. High 62°, low 53°.

Pressure30.27 inHg

Wind11.1 mph E

Humidity59%

Visibility—

Dew point47°

Fri, 1658° / 40°

0.04

58 °

Altmar, Friday, 16 October

Light rain. High 58°, low 40°.

Pressure29.88 inHg

Wind26.4 mph W

Humidity47%

Visibility—

Dew point33°

Sat, 1741° / 33°

41 °

Altmar, Saturday, 17 October

Overcast. High 41°, low 33°.

Pressure30.30 inHg

Wind22 mph NW

Humidity51%

Visibility—

Dew point23°

Sun, 1847° / 29°

47 °

Altmar, Sunday, 18 October

Clear. High 47°, low 29°.

Pressure30.53 inHg

Wind8.6 mph N

Humidity34%

Visibility—

Dew point16°

Mon, 1958° / 37°

58 °

Altmar, Monday, 19 October

Overcast. High 58°, low 37°.

Pressure30.36 inHg

Wind14.7 mph S

Humidity33%

Visibility—

Dew point24°

Tue, 2064° / 42°

64 °

Altmar, Tuesday, 20 October

Overcast. High 64°, low 42°.

Pressure30.27 inHg

Wind14 mph S

Humidity29%

Visibility—

Dew point26°

Wed, 2154° / 50°

0.13

54 °

Altmar, Wednesday, 21 October

Light rain. High 54°, low 50°.

Pressure30.00 inHg

Wind16.3 mph S

Humidity83%

Visibility—

Dew point45°

Thu, 2267° / 43°

67 °

Altmar, Thursday, 22 October

Clear. High 67°, low 43°.

Pressure30.12 inHg

Wind14.8 mph SW

Humidity42%

Visibility—

Dew point37°

Fri, 2358° / 43°

58 °

Altmar, Friday, 23 October

Clear. High 58°, low 43°.

Pressure30.18 inHg

Wind10.7 mph NW

Humidity39%

Visibility—

Dew point30°

Sat, 2458° / 43°

58 °

Altmar, Saturday, 24 October

Overcast. High 58°, low 43°.

Pressure30.21 inHg

Wind8.1 mph SE

Humidity43%

Visibility—

Dew point29°

Sun, 2557° / 41°

0.17

57 °

Altmar, Sunday, 25 October

Light rain. High 57°, low 41°.

Pressure29.74 inHg

Wind17.9 mph NW

Humidity87%

Visibility—

Dew point52°

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 Altmar, 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 Altmar, 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.