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As of 15:37 CDT

Weather in St. Marys, IA

75°Current weather

St. Marys, Sunday, 25 October, 15:37

Overcast. Feels like 75°. High 75°, low 51°.

Pressure30.27 inHg
Wind0.9 mph NE
Humidity60%
Visibility6.2 mi
Dew point60°
Mon, 2671° / 52°0.01Light rain
71 °Light rain

St. Marys, Monday, 26 October

Light rain. High 71°, low 52°.

Pressure30.27 inHg
Wind4.7 mph E
Humidity74%
Visibility6.2 mi
Dew point56°
Tue, 2768° / 55°0.05Light rain
68 °Light rain

St. Marys, Tuesday, 27 October

Light rain. High 68°, low 55°.

Pressure30.12 inHg
Wind11.9 mph SW
Humidity60%
Visibility6.2 mi
Dew point53°
Wed, 2872° / 57°0Overcast
72 °Overcast

St. Marys, Wednesday, 28 October

Overcast. High 72°, low 57°.

Pressure30.06 inHg
Wind11.8 mph S
Humidity62%
Visibility6.2 mi
Dew point55°
Thu, 2970° / 56°0.02Light rain
70 °Light rain

St. Marys, Thursday, 29 October

Light rain. High 70°, low 56°.

Pressure30.06 inHg
Wind7.4 mph W
Humidity75%
Visibility6.2 mi
Dew point59°
Fri, 3067° / 51°0.08Light rain
67 °Light rain

St. Marys, Friday, 30 October

Light rain. High 67°, low 51°.

Pressure30.12 inHg
Wind10.2 mph SE
Humidity73%
Visibility—
Dew point55°
Sat, 3165° / 56°0.17Light rain
65 °Light rain

St. Marys, Saturday, 31 October

Light rain. High 65°, low 56°.

Pressure30.12 inHg
Wind10 mph SE
Humidity70%
Visibility—
Dew point53°
Sun, 0165° / 53°0Overcast
65 °Overcast

St. Marys, Sunday, 1 November

Overcast. High 65°, low 53°.

Pressure30.15 inHg
Wind6.1 mph E
Humidity76%
Visibility—
Dew point52°
Mon, 0263° / 51°0Overcast
63 °Overcast

St. Marys, Monday, 2 November

Overcast. High 63°, low 51°.

Pressure30.06 inHg
Wind12.9 mph E
Humidity66%
Visibility—
Dew point49°
Tue, 0366° / 56°0.02Light rain
66 °Light rain

St. Marys, Tuesday, 3 November

Light rain. High 66°, low 56°.

Pressure30.03 inHg
Wind13.2 mph SE
Humidity67%
Visibility—
Dew point51°
Wed, 0462° / 54°0.04Light rain
62 °Light rain

St. Marys, Wednesday, 4 November

Light rain. High 62°, low 54°.

Pressure30.03 inHg
Wind9 mph N
Humidity76%
Visibility—
Dew point54°
Thu, 0560° / 45°0Overcast
60 °Overcast

St. Marys, Thursday, 5 November

Overcast. High 60°, low 45°.

Pressure30.00 inHg
Wind6.3 mph NW
Humidity49%
Visibility—
Dew point37°
Fri, 0660° / 44°0Overcast
60 °Overcast

St. Marys, Friday, 6 November

Overcast. High 60°, low 44°.

Pressure29.91 inHg
Wind9.5 mph SE
Humidity54%
Visibility—
Dew point39°
Sat, 0767° / 53°0.09Light rain
67 °Light rain

St. Marys, Saturday, 7 November

Light rain. High 67°, low 53°.

Pressure29.65 inHg
Wind13.3 mph SW
Humidity70%
Visibility—
Dew point53°
Sun, 0859° / 48°0Clear
59 °Clear

St. Marys, Sunday, 8 November

Clear. High 59°, low 48°.

Pressure29.77 inHg
Wind17.6 mph W
Humidity35%
Visibility—
Dew point30°
Mon, 0952° / 43°0Partly cloudy
52 °Partly cloudy

St. Marys, Monday, 9 November

Partly cloudy. High 52°, low 43°.

Pressure29.71 inHg
Wind22.3 mph NW
Humidity44%
Visibility—
Dew point28°

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.