As of 17:16 CST

Weather in St. Marys, IA

38°

St. Marys, Friday, 13 November, 17:16

Clear. Feels like 38°. High 41°, low 26°.

Pressure30.15 inHg

Wind2.5 mph N

Humidity68%

Visibility6.2 mi

Dew point29°

See detailed hourly forecast

Sat, 1443° / 23°

43 °

St. Marys, Saturday, 14 November

Clear. High 43°, low 23°.

Pressure30.33 inHg

Wind4 mph SE

Humidity63%

Visibility6.2 mi

Dew point26°

Sun, 1548° / 26°

48 °

St. Marys, Sunday, 15 November

Clear. High 48°, low 26°.

Pressure30.45 inHg

Wind4.9 mph S

Humidity56%

Visibility6.2 mi

Dew point30°

Mon, 1653° / 31°

53 °

St. Marys, Monday, 16 November

Overcast. High 53°, low 31°.

Pressure30.45 inHg

Wind9.8 mph SW

Humidity53%

Visibility6.2 mi

Dew point34°

Tue, 1756° / 37°

56 °

St. Marys, Tuesday, 17 November

Clear. High 56°, low 37°.

Pressure30.33 inHg

Wind11.4 mph S

Humidity55%

Visibility6.2 mi

Dew point38°

Wed, 1858° / 43°

58 °

St. Marys, Wednesday, 18 November

Overcast. High 58°, low 43°.

Pressure30.09 inHg

Wind17.6 mph S

Humidity52%

Visibility—

Dew point36°

Thu, 1955° / 43°

55 °

St. Marys, Thursday, 19 November

Partly cloudy. High 55°, low 43°.

Pressure30.27 inHg

Wind15.5 mph S

Humidity57%

Visibility—

Dew point38°

Fri, 2063° / 41°

0.16

63 °

St. Marys, Friday, 20 November

Light rain. High 63°, low 41°.

Pressure30.00 inHg

Wind21.9 mph S

Humidity86%

Visibility—

Dew point54°

Sat, 2160° / 34°

0.07

60 °

St. Marys, Saturday, 21 November

Light rain. High 60°, low 34°.

Pressure30.06 inHg

Wind30.7 mph NW

Humidity85%

Visibility—

Dew point38°

Sun, 2234° / 25°

34 °

St. Marys, Sunday, 22 November

Light snow. High 34°, low 25°.

Pressure30.39 inHg

Wind18.1 mph NW

Humidity43%

Visibility—

Dew point13°

Mon, 2322° / 17°

22 °

St. Marys, Monday, 23 November

Overcast. High 22°, low 17°.

Pressure30.59 inHg

Wind18.6 mph N

Humidity38%

Visibility—

Dew point-1°

Tue, 2429° / 15°

29 °

St. Marys, Tuesday, 24 November

Clear. High 29°, low 15°.

Pressure30.65 inHg

Wind7.5 mph NW

Humidity36%

Visibility—

Dew point2°

Wed, 2537° / 18°

37 °

St. Marys, Wednesday, 25 November

Clear. High 37°, low 18°.

Pressure30.62 inHg

Wind15.8 mph SW

Humidity24%

Visibility—

Dew point-1°

Thu, 2644° / 29°

44 °

St. Marys, Thursday, 26 November

Partly cloudy. High 44°, low 29°.

Pressure30.27 inHg

Wind18.3 mph SW

Humidity54%

Visibility—

Dew point26°

Fri, 2748° / 33°

48 °

St. Marys, Friday, 27 November

Mostly clear. High 48°, low 33°.

Pressure30.12 inHg

Wind18.9 mph SW

Humidity60%

Visibility—

Dew point31°

Sat, 2841° / 35°

0.04

41 °

St. Marys, Saturday, 28 November

Light rain. High 41°, low 35°.

Pressure30.12 inHg

Wind10.2 mph S

Humidity48%

Visibility—

Dew point22°

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 St. Marys, IA 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 St. Marys, IA 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.