As of 17:43 CST

Weather in St. Marys, IA

55°

St. Marys, Wednesday, 11 November, 17:43

Partly cloudy. Feels like 53°. High 60°, low 45°.

Pressure29.97 inHg

Wind6 mph NW

Humidity69%

Visibility6.2 mi

Dew point45°

See detailed hourly forecast

Thu, 1248° / 35°

48 °

St. Marys, Thursday, 12 November

Overcast. High 48°, low 35°.

Pressure30.15 inHg

Wind12.2 mph N

Humidity61%

Visibility6.2 mi

Dew point28°

Fri, 1341° / 29°

41 °

St. Marys, Friday, 13 November

Partly cloudy. High 41°, low 29°.

Pressure30.24 inHg

Wind7.5 mph N

Humidity67%

Visibility6.2 mi

Dew point24°

Sat, 1443° / 23°

43 °

St. Marys, Saturday, 14 November

Clear. High 43°, low 23°.

Pressure30.33 inHg

Wind2 mph SE

Humidity63%

Visibility6.2 mi

Dew point25°

Sun, 1548° / 27°

48 °

St. Marys, Sunday, 15 November

Clear. High 48°, low 27°.

Pressure30.45 inHg

Wind6.5 mph S

Humidity56%

Visibility6.2 mi

Dew point28°

Mon, 1652° / 30°

52 °

St. Marys, Monday, 16 November

Clear. High 52°, low 30°.

Pressure30.42 inHg

Wind9.5 mph S

Humidity52%

Visibility—

Dew point30°

Tue, 1752° / 37°

52 °

St. Marys, Tuesday, 17 November

Overcast. High 52°, low 37°.

Pressure30.36 inHg

Wind12.4 mph S

Humidity51%

Visibility—

Dew point32°

Wed, 1855° / 40°

55 °

St. Marys, Wednesday, 18 November

Partly cloudy. High 55°, low 40°.

Pressure30.18 inHg

Wind17.6 mph S

Humidity48%

Visibility—

Dew point33°

Thu, 1952° / 46°

0.03

52 °

St. Marys, Thursday, 19 November

Light rain. High 52°, low 46°.

Pressure29.97 inHg

Wind12.8 mph S

Humidity59%

Visibility—

Dew point37°

Fri, 2062° / 47°

0.06

62 °

St. Marys, Friday, 20 November

Light rain. High 62°, low 47°.

Pressure29.91 inHg

Wind11.4 mph S

Humidity70%

Visibility—

Dew point49°

Sat, 2159° / 48°

0.01

59 °

St. Marys, Saturday, 21 November

Light rain. High 59°, low 48°.

Pressure30.03 inHg

Wind12.8 mph N

Humidity61%

Visibility—

Dew point43°

Sun, 2243° / 21°

1.15

43 °

St. Marys, Sunday, 22 November

Snow. High 43°, low 21°.

Pressure30.12 inHg

Wind18.5 mph N

Humidity90%

Visibility—

Dew point27°

Mon, 2331° / 13°

31 °

St. Marys, Monday, 23 November

Overcast. High 31°, low 13°.

Pressure29.97 inHg

Wind14.1 mph N

Humidity78%

Visibility—

Dew point20°

Tue, 2424° / 13°

24 °

St. Marys, Tuesday, 24 November

Clear. High 24°, low 13°.

Pressure30.39 inHg

Wind12.1 mph NW

Humidity79%

Visibility—

Dew point17°

Wed, 2534° / 14°

34 °

St. Marys, Wednesday, 25 November

Clear. High 34°, low 14°.

Pressure30.36 inHg

Wind9 mph SW

Humidity90%

Visibility—

Dew point28°

Thu, 2638° / 27°

38 °

St. Marys, Thursday, 26 November

Mostly clear. High 38°, low 27°.

Pressure30.36 inHg

Wind10.4 mph SW

Humidity101%

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 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.