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As of 01:39 CST

Weather in St. Marys, IA

47°Current weather

St. Marys, Wednesday, 11 November, 01:39

Clear. Feels like 47°. High 60°, low 46°.

Pressure29.91 inHg
Wind1 mph SW
Humidity76%
Visibility6.2 mi
Dew point40°
Thu, 1246° / 34°0Overcast
46 °Overcast

St. Marys, Thursday, 12 November

Overcast. High 46°, low 34°.

Pressure30.18 inHg
Wind12.2 mph N
Humidity62%
Visibility6.2 mi
Dew point28°
Fri, 1341° / 28°0Partly cloudy
41 °Partly cloudy

St. Marys, Friday, 13 November

Partly cloudy. High 41°, low 28°.

Pressure30.21 inHg
Wind6.2 mph N
Humidity67%
Visibility6.2 mi
Dew point23°
Sat, 1445° / 23°0Clear
45 °Clear

St. Marys, Saturday, 14 November

Clear. High 45°, low 23°.

Pressure30.27 inHg
Wind3.9 mph SE
Humidity62%
Visibility6.2 mi
Dew point26°
Sun, 1550° / 30°0Mostly clear
50 °Mostly clear

St. Marys, Sunday, 15 November

Mostly clear. High 50°, low 30°.

Pressure30.33 inHg
Wind6.6 mph SE
Humidity53%
Visibility—
Dew point29°
Mon, 1650° / 31°0Mostly clear
50 °Mostly clear

St. Marys, Monday, 16 November

Mostly clear. High 50°, low 31°.

Pressure30.42 inHg
Wind6.9 mph S
Humidity51%
Visibility—
Dew point29°
Tue, 1749° / 33°0Overcast
49 °Overcast

St. Marys, Tuesday, 17 November

Overcast. High 49°, low 33°.

Pressure30.33 inHg
Wind11.6 mph S
Humidity58%
Visibility—
Dew point31°
Wed, 1851° / 37°0Overcast
51 °Overcast

St. Marys, Wednesday, 18 November

Overcast. High 51°, low 37°.

Pressure30.09 inHg
Wind18.8 mph S
Humidity57%
Visibility—
Dew point30°
Thu, 1961° / 48°0.03Light rain
61 °Light rain

St. Marys, Thursday, 19 November

Light rain. High 61°, low 48°.

Pressure29.88 inHg
Wind19.1 mph S
Humidity69%
Visibility—
Dew point47°
Fri, 2048° / 44°2.33Heavy rain
48 °Heavy rain

St. Marys, Friday, 20 November

Heavy rain. High 48°, low 44°.

Pressure29.85 inHg
Wind23 mph N
Humidity96%
Visibility—
Dew point47°
Sat, 2144° / 33°0.39Snow
44 °Snow

St. Marys, Saturday, 21 November

Snow. High 44°, low 33°.

Pressure29.88 inHg
Wind21.8 mph N
Humidity96%
Visibility—
Dew point35°
Sun, 2231° / 21°0Overcast
31 °Overcast

St. Marys, Sunday, 22 November

Overcast. High 31°, low 21°.

Pressure30.33 inHg
Wind19.3 mph NW
Humidity45%
Visibility—
Dew point10°
Mon, 2324° / 15°0Mostly clear
24 °Mostly clear

St. Marys, Monday, 23 November

Mostly clear. High 24°, low 15°.

Pressure30.45 inHg
Wind17.5 mph NW
Humidity34%
Visibility—
Dew point-2°
Tue, 2438° / 19°0Overcast
38 °Overcast

St. Marys, Tuesday, 24 November

Overcast. High 38°, low 19°.

Pressure30.18 inHg
Wind14.7 mph SW
Humidity39%
Visibility—
Dew point11°
Wed, 2547° / 31°0Overcast
47 °Overcast

St. Marys, Wednesday, 25 November

Overcast. High 47°, low 31°.

Pressure29.97 inHg
Wind11.7 mph SW
Humidity67%
Visibility—
Dew point34°
Thu, 2647° / 36°0Overcast
47 °Overcast

St. Marys, Thursday, 26 November

Overcast. High 47°, low 36°.

Pressure30.12 inHg
Wind7.5 mph SW
Humidity60%
Visibility—
Dew point32°

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.