As of 06:02 CST

Weather in St. Marys, IA

23°

St. Marys, Saturday, 14 November, 06:02

Clear. Feels like 23°. High 46°, low 23°.

Pressure30.27 inHg

Wind1.7 mph SW

Humidity97%

Visibility6.2 mi

Dew point22°

See detailed hourly forecast

Sun, 1550° / 25°

50 °

St. Marys, Sunday, 15 November

Clear. High 50°, low 25°.

Pressure30.45 inHg

Wind6.2 mph S

Humidity54%

Visibility6.2 mi

Dew point30°

Mon, 1654° / 31°

54 °

St. Marys, Monday, 16 November

Partly cloudy. High 54°, low 31°.

Pressure30.45 inHg

Wind9.7 mph SW

Humidity51%

Visibility6.2 mi

Dew point34°

Tue, 1756° / 37°

56 °

St. Marys, Tuesday, 17 November

Partly cloudy. High 56°, low 37°.

Pressure30.36 inHg

Wind11.8 mph S

Humidity54%

Visibility6.2 mi

Dew point38°

Wed, 1858° / 45°

58 °

St. Marys, Wednesday, 18 November

Overcast. High 58°, low 45°.

Pressure30.12 inHg

Wind16.8 mph S

Humidity51%

Visibility—

Dew point37°

Thu, 1959° / 46°

59 °

St. Marys, Thursday, 19 November

Partly cloudy. High 59°, low 46°.

Pressure30.15 inHg

Wind16.2 mph S

Humidity64%

Visibility—

Dew point46°

Fri, 2056° / 40°

0.09

56 °

St. Marys, Friday, 20 November

Light rain. High 56°, low 40°.

Pressure30.15 inHg

Wind15.3 mph S

Humidity70%

Visibility—

Dew point39°

Sat, 2159° / 41°

0.05

59 °

St. Marys, Saturday, 21 November

Light rain. High 59°, low 41°.

Pressure29.74 inHg

Wind23.6 mph SW

Humidity80%

Visibility—

Dew point52°

Sun, 2244° / 35°

44 °

St. Marys, Sunday, 22 November

Partly cloudy. High 44°, low 35°.

Pressure30.15 inHg

Wind20.3 mph W

Humidity52%

Visibility—

Dew point24°

Mon, 2341° / 30°

41 °

St. Marys, Monday, 23 November

Clear. High 41°, low 30°.

Pressure30.24 inHg

Wind15.3 mph NW

Humidity45%

Visibility—

Dew point19°

Tue, 2446° / 26°

46 °

St. Marys, Tuesday, 24 November

Overcast. High 46°, low 26°.

Pressure30.24 inHg

Wind7.4 mph S

Humidity44%

Visibility—

Dew point20°

Wed, 2542° / 29°

0.01

42 °

St. Marys, Wednesday, 25 November

Light rain. High 42°, low 29°.

Pressure30.33 inHg

Wind14.2 mph N

Humidity51%

Visibility—

Dew point19°

Thu, 2637° / 22°

37 °

St. Marys, Thursday, 26 November

Clear. High 37°, low 22°.

Pressure30.53 inHg

Wind9 mph N

Humidity47%

Visibility—

Dew point15°

Fri, 2738° / 24°

38 °

St. Marys, Friday, 27 November

Overcast. High 38°, low 24°.

Pressure30.27 inHg

Wind6.9 mph E

Humidity45%

Visibility—

Dew point16°

Sat, 2838° / 28°

38 °

St. Marys, Saturday, 28 November

Overcast. High 38°, low 28°.

Pressure30.03 inHg

Wind5.4 mph NE

Humidity41%

Visibility—

Dew point15°

Sun, 2940° / 30°

40 °

St. Marys, Sunday, 29 November

Overcast. High 40°, low 30°.

Pressure30.09 inHg

Wind4.7 mph SE

Humidity62%

Visibility—

Dew point26°

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.