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As of 00:07 CDT

Weather in St. Marys, IA

53°Current weather

St. Marys, Saturday, 31 October, 00:07

Overcast. Feels like 52°. High 63°, low 53°.

Pressure30.24 inHg
Wind1 mph NW
Humidity89%
Visibility6.2 mi
Dew point50°
Sun, 0168° / 53°0.02Light rain
68 °Light rain

St. Marys, Sunday, 1 November

Light rain. High 68°, low 53°.

Pressure30.24 inHg
Wind6.2 mph SE
Humidity70%
Visibility6.2 mi
Dew point53°
Mon, 0266° / 58°0.24Rain
66 °Rain

St. Marys, Monday, 2 November

Rain. High 66°, low 58°.

Pressure29.88 inHg
Wind19.3 mph S
Humidity77%
Visibility5.1 mi
Dew point57°
Tue, 0372° / 62°0.28Light rain
72 °Light rain

St. Marys, Tuesday, 3 November

Light rain. High 72°, low 62°.

Pressure29.71 inHg
Wind11.3 mph S
Humidity95%
Visibility3.9 mi
Dew point64°
Wed, 0458° / 48°1.14Heavy rain
58 °Heavy rain

St. Marys, Wednesday, 4 November

Heavy rain. High 58°, low 48°.

Pressure29.88 inHg
Wind13.9 mph N
Humidity96%
Visibility—
Dew point50°
Thu, 0560° / 47°0.06Light rain
60 °Light rain

St. Marys, Thursday, 5 November

Light rain. High 60°, low 47°.

Pressure29.85 inHg
Wind14.4 mph N
Humidity62%
Visibility—
Dew point43°
Fri, 0661° / 46°0Clear
61 °Clear

St. Marys, Friday, 6 November

Clear. High 61°, low 46°.

Pressure30.06 inHg
Wind6.6 mph SE
Humidity65%
Visibility—
Dew point45°
Sat, 0762° / 46°0Mostly clear
62 °Mostly clear

St. Marys, Saturday, 7 November

Mostly clear. High 62°, low 46°.

Pressure30.03 inHg
Wind9.7 mph SE
Humidity64%
Visibility—
Dew point46°
Sun, 0862° / 50°0Overcast
62 °Overcast

St. Marys, Sunday, 8 November

Overcast. High 62°, low 50°.

Pressure30.15 inHg
Wind4.2 mph SE
Humidity64%
Visibility—
Dew point47°
Mon, 0963° / 46°0Clear
63 °Clear

St. Marys, Monday, 9 November

Clear. High 63°, low 46°.

Pressure30.15 inHg
Wind7.7 mph W
Humidity43%
Visibility—
Dew point37°
Tue, 1067° / 48°0Clear
67 °Clear

St. Marys, Tuesday, 10 November

Clear. High 67°, low 48°.

Pressure29.94 inHg
Wind11.4 mph SW
Humidity47%
Visibility—
Dew point42°
Wed, 1160° / 48°0Overcast
60 °Overcast

St. Marys, Wednesday, 11 November

Overcast. High 60°, low 48°.

Pressure29.91 inHg
Wind12.8 mph SW
Humidity50%
Visibility—
Dew point40°
Thu, 1259° / 45°0Clear
59 °Clear

St. Marys, Thursday, 12 November

Clear. High 59°, low 45°.

Pressure29.85 inHg
Wind18.8 mph NW
Humidity41%
Visibility—
Dew point33°
Fri, 1350° / 39°0Clear
50 °Clear

St. Marys, Friday, 13 November

Clear. High 50°, low 39°.

Pressure30.12 inHg
Wind16.9 mph NW
Humidity49%
Visibility—
Dew point29°
Sat, 1450° / 34°0Partly cloudy
50 °Partly cloudy

St. Marys, Saturday, 14 November

Partly cloudy. High 50°, low 34°.

Pressure30.12 inHg
Wind6.8 mph SE
Humidity42%
Visibility—
Dew point25°
Sun, 1554° / 39°0Overcast
54 °Overcast

St. Marys, Sunday, 15 November

Overcast. High 54°, low 39°.

Pressure29.94 inHg
Wind10.5 mph SE
Humidity44%
Visibility—
Dew point31°

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.