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As of 06:25 CST

Weather in St. Marys, IA

53°Current weather

St. Marys, Sunday, 1 November, 06:25

Clear. Feels like 52°. High 66°, low 53°.

Pressure30.21 inHg
Wind2 mph NE
Humidity99%
Visibility6.2 mi
Dew point52°
Mon, 0268° / 59°0.24Rain
68 °Rain

St. Marys, Monday, 2 November

Rain. High 68°, low 59°.

Pressure29.74 inHg
Wind18.7 mph S
Humidity96%
Visibility3.1 mi
Dew point62°
Tue, 0366° / 54°0.49Heavy rain
66 °Heavy rain

St. Marys, Tuesday, 3 November

Heavy rain. High 66°, low 54°.

Pressure29.59 inHg
Wind7.8 mph W
Humidity73%
Visibility6.2 mi
Dew point56°
Wed, 0454° / 48°0.04Light rain
54 °Light rain

St. Marys, Wednesday, 4 November

Light rain. High 54°, low 48°.

Pressure29.71 inHg
Wind14.3 mph W
Humidity69%
Visibility6.2 mi
Dew point42°
Thu, 0556° / 49°0.02Light rain
56 °Light rain

St. Marys, Thursday, 5 November

Light rain. High 56°, low 49°.

Pressure29.91 inHg
Wind12.3 mph NW
Humidity66%
Visibility—
Dew point42°
Fri, 0655° / 41°0Overcast
55 °Overcast

St. Marys, Friday, 6 November

Overcast. High 55°, low 41°.

Pressure30.18 inHg
Wind7.5 mph N
Humidity65%
Visibility—
Dew point39°
Sat, 0756° / 42°0Overcast
56 °Overcast

St. Marys, Saturday, 7 November

Overcast. High 56°, low 42°.

Pressure29.74 inHg
Wind10.1 mph NW
Humidity54%
Visibility—
Dew point38°
Sun, 0857° / 40°0Clear
57 °Clear

St. Marys, Sunday, 8 November

Clear. High 57°, low 40°.

Pressure29.91 inHg
Wind11.8 mph W
Humidity55%
Visibility—
Dew point37°
Mon, 0964° / 43°0Clear
64 °Clear

St. Marys, Monday, 9 November

Clear. High 64°, low 43°.

Pressure29.91 inHg
Wind8.8 mph W
Humidity48%
Visibility—
Dew point38°
Tue, 1058° / 47°0Overcast
58 °Overcast

St. Marys, Tuesday, 10 November

Overcast. High 58°, low 47°.

Pressure30.06 inHg
Wind6.6 mph NE
Humidity44%
Visibility—
Dew point35°
Wed, 1153° / 42°0.01Light rain
53 °Light rain

St. Marys, Wednesday, 11 November

Light rain. High 53°, low 42°.

Pressure30.09 inHg
Wind7.6 mph E
Humidity50%
Visibility—
Dew point33°
Thu, 1255° / 42°0Partly cloudy
55 °Partly cloudy

St. Marys, Thursday, 12 November

Partly cloudy. High 55°, low 42°.

Pressure29.94 inHg
Wind6.2 mph N
Humidity61%
Visibility—
Dew point39°
Fri, 1354° / 45°0Light rain
54 °Light rain

St. Marys, Friday, 13 November

Light rain. High 54°, low 45°.

Pressure30.12 inHg
Wind7.3 mph SE
Humidity66%
Visibility—
Dew point40°
Sat, 1456° / 41°0Mostly clear
56 °Mostly clear

St. Marys, Saturday, 14 November

Mostly clear. High 56°, low 41°.

Pressure29.97 inHg
Wind18.1 mph S
Humidity56%
Visibility—
Dew point38°
Sun, 1568° / 47°0Partly cloudy
68 °Partly cloudy

St. Marys, Sunday, 15 November

Partly cloudy. High 68°, low 47°.

Pressure29.77 inHg
Wind12.6 mph S
Humidity49%
Visibility—
Dew point44°
Mon, 1667° / 49°0Clear
67 °Clear

St. Marys, Monday, 16 November

Clear. High 67°, low 49°.

Pressure29.91 inHg
Wind6.7 mph SE
Humidity48%
Visibility—
Dew point43°

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.