As of 11:18 CDT

Weather in St. Marys, IA

61°Current weather

St. Marys, Sunday, 25 October, 11:18

Overcast. Feels like 60°. High 71°, low 51°.

Pressure30.39 inHg
Wind1.5 mph N
Humidity80%
Visibility6.2 mi
Dew point55°
Mon, 2673° / 51°0.05Rain
73 °Rain

St. Marys, Monday, 26 October

Rain. High 73°, low 51°.

Pressure30.27 inHg
Wind6.1 mph E
Humidity71%
Visibility6.2 mi
Dew point54°
Tue, 2767° / 56°0.24Rain
67 °Rain

St. Marys, Tuesday, 27 October

Rain. High 67°, low 56°.

Pressure30.12 inHg
Wind11.3 mph S
Humidity67%
Visibility6.2 mi
Dew point55°
Wed, 2873° / 59°0Partly cloudy
73 °Partly cloudy

St. Marys, Wednesday, 28 October

Partly cloudy. High 73°, low 59°.

Pressure30.06 inHg
Wind12 mph S
Humidity59%
Visibility6.2 mi
Dew point54°
Thu, 2969° / 57°0.04Light rain
69 °Light rain

St. Marys, Thursday, 29 October

Light rain. High 69°, low 57°.

Pressure30.12 inHg
Wind11.5 mph SW
Humidity68%
Visibility—
Dew point56°
Fri, 3071° / 52°0.07Light rain
71 °Light rain

St. Marys, Friday, 30 October

Light rain. High 71°, low 52°.

Pressure30.18 inHg
Wind9.1 mph SE
Humidity73%
Visibility—
Dew point57°
Sat, 3161° / 58°0.43Light rain
61 °Light rain

St. Marys, Saturday, 31 October

Light rain. High 61°, low 58°.

Pressure30.06 inHg
Wind9.1 mph S
Humidity91%
Visibility—
Dew point56°
Sun, 0168° / 54°0.01Light rain
68 °Light rain

St. Marys, Sunday, 1 November

Light rain. High 68°, low 54°.

Pressure30.06 inHg
Wind6.8 mph NW
Humidity67%
Visibility—
Dew point53°
Mon, 0272° / 54°0.09Light rain
72 °Light rain

St. Marys, Monday, 2 November

Light rain. High 72°, low 54°.

Pressure29.74 inHg
Wind21.3 mph S
Humidity77%
Visibility—
Dew point57°
Tue, 0362° / 50°0Clear
62 °Clear

St. Marys, Tuesday, 3 November

Clear. High 62°, low 50°.

Pressure29.91 inHg
Wind18.6 mph NW
Humidity56%
Visibility—
Dew point44°
Wed, 0458° / 46°0Clear
58 °Clear

St. Marys, Wednesday, 4 November

Clear. High 58°, low 46°.

Pressure29.91 inHg
Wind16.8 mph NW
Humidity47%
Visibility—
Dew point35°
Thu, 0557° / 45°0Overcast
57 °Overcast

St. Marys, Thursday, 5 November

Overcast. High 57°, low 45°.

Pressure29.85 inHg
Wind7.3 mph W
Humidity62%
Visibility—
Dew point40°
Fri, 0659° / 42°0Overcast
59 °Overcast

St. Marys, Friday, 6 November

Overcast. High 59°, low 42°.

Pressure29.85 inHg
Wind6.8 mph NW
Humidity57%
Visibility—
Dew point39°
Sat, 0763° / 46°0Light rain
63 °Light rain

St. Marys, Saturday, 7 November

Light rain. High 63°, low 46°.

Pressure29.41 inHg
Wind17.9 mph S
Humidity56%
Visibility—
Dew point45°
Sun, 0852° / 44°0.06Light rain
52 °Light rain

St. Marys, Sunday, 8 November

Light rain. High 52°, low 44°.

Pressure29.56 inHg
Wind20 mph NW
Humidity82%
Visibility—
Dew point44°
Mon, 0954° / 42°0Partly cloudy
54 °Partly cloudy

St. Marys, Monday, 9 November

Partly cloudy. High 54°, low 42°.

Pressure30.12 inHg
Wind16.5 mph NW
Humidity65%
Visibility—
Dew point39°

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.