As of 21:24 CST

Weather in St. Marys, IA

48°

St. Marys, Wednesday, 11 November, 21:24

Clear. Feels like 44°. High 60°, low 45°.

Pressure30.00 inHg

Wind7 mph NW

Humidity84%

Visibility6.2 mi

Dew point42°

See detailed hourly forecast

Thu, 1246° / 34°

46 °

St. Marys, Thursday, 12 November

Overcast. High 46°, low 34°.

Pressure30.18 inHg

Wind11.8 mph N

Humidity63%

Visibility6.2 mi

Dew point29°

Fri, 1342° / 29°

42 °

St. Marys, Friday, 13 November

Partly cloudy. High 42°, low 29°.

Pressure30.21 inHg

Wind7.5 mph N

Humidity65%

Visibility6.2 mi

Dew point23°

Sat, 1443° / 25°

43 °

St. Marys, Saturday, 14 November

Clear. High 43°, low 25°.

Pressure30.36 inHg

Wind2.8 mph SE

Humidity64%

Visibility6.2 mi

Dew point25°

Sun, 1549° / 27°

49 °

St. Marys, Sunday, 15 November

Overcast. High 49°, low 27°.

Pressure30.42 inHg

Wind7.6 mph S

Humidity54%

Visibility6.2 mi

Dew point29°

Mon, 1654° / 33°

54 °

St. Marys, Monday, 16 November

Clear. High 54°, low 33°.

Pressure30.39 inHg

Wind11.1 mph S

Humidity50%

Visibility—

Dew point31°

Tue, 1753° / 40°

53 °

St. Marys, Tuesday, 17 November

Overcast. High 53°, low 40°.

Pressure30.30 inHg

Wind13 mph S

Humidity55%

Visibility—

Dew point34°

Wed, 1857° / 41°

57 °

St. Marys, Wednesday, 18 November

Clear. High 57°, low 41°.

Pressure30.15 inHg

Wind17.8 mph S

Humidity46%

Visibility—

Dew point33°

Thu, 1960° / 47°

60 °

St. Marys, Thursday, 19 November

Overcast. High 60°, low 47°.

Pressure30.03 inHg

Wind17.7 mph S

Humidity51%

Visibility—

Dew point38°

Fri, 2055° / 47°

55 °

St. Marys, Friday, 20 November

Overcast. High 55°, low 47°.

Pressure30.12 inHg

Wind13.9 mph NW

Humidity70%

Visibility—

Dew point44°

Sat, 2152° / 44°

0.11

52 °

St. Marys, Saturday, 21 November

Light rain. High 52°, low 44°.

Pressure30.12 inHg

Wind11.8 mph SE

Humidity70%

Visibility—

Dew point40°

Sun, 2256° / 41°

0.62

56 °

St. Marys, Sunday, 22 November

Rain. High 56°, low 41°.

Pressure29.80 inHg

Wind21.9 mph SW

Humidity84%

Visibility—

Dew point41°

Mon, 2344° / 36°

44 °

St. Marys, Monday, 23 November

Light rain. High 44°, low 36°.

Pressure30.06 inHg

Wind8.1 mph NW

Humidity64%

Visibility—

Dew point31°

Tue, 2436° / 29°

36 °

St. Marys, Tuesday, 24 November

Overcast. High 36°, low 29°.

Pressure30.06 inHg

Wind14.6 mph N

Humidity57%

Visibility—

Dew point20°

Wed, 2536° / 27°

36 °

St. Marys, Wednesday, 25 November

Clear. High 36°, low 27°.

Pressure30.24 inHg

Wind13.2 mph NW

Humidity44%

Visibility—

Dew point14°

Thu, 2634° / 27°

34 °

St. Marys, Thursday, 26 November

Overcast. High 34°, low 27°.

Pressure30.56 inHg

Wind9.1 mph NW

Humidity45%

Visibility—

Dew point14°

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.