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As of 12:05 CDT

Weather in St. Marys, IA

62°Current weather

St. Marys, Thursday, 29 October, 12:05

Clear. Feels like 61°. High 65°, low 52°.

Pressure30.21 inHg
Wind6 mph NE
Humidity55%
Visibility6.2 mi
Dew point45°
Fri, 3059° / 50°0.48Heavy rain
59 °Heavy rain

St. Marys, Friday, 30 October

Heavy rain. High 59°, low 50°.

Pressure30.21 inHg
Wind8.9 mph E
Humidity75%
Visibility6.2 mi
Dew point49°
Sat, 3166° / 57°0.07Light rain
66 °Light rain

St. Marys, Saturday, 31 October

Light rain. High 66°, low 57°.

Pressure30.24 inHg
Wind6.4 mph SW
Humidity80%
Visibility4.8 mi
Dew point60°
Sun, 0167° / 58°0.11Light rain
67 °Light rain

St. Marys, Sunday, 1 November

Light rain. High 67°, low 58°.

Pressure30.21 inHg
Wind4.9 mph SE
Humidity77%
Visibility6.2 mi
Dew point57°
Mon, 0267° / 59°0.67Rain
67 °Rain

St. Marys, Monday, 2 November

Rain. High 67°, low 59°.

Pressure29.85 inHg
Wind15.7 mph S
Humidity96%
Visibility2.5 mi
Dew point63°
Tue, 0365° / 56°0.17Light rain
65 °Light rain

St. Marys, Tuesday, 3 November

Light rain. High 65°, low 56°.

Pressure29.77 inHg
Wind18.5 mph S
Humidity63%
Visibility—
Dew point52°
Wed, 0460° / 49°0.95Rain
60 °Rain

St. Marys, Wednesday, 4 November

Rain. High 60°, low 49°.

Pressure29.71 inHg
Wind12.3 mph NW
Humidity95%
Visibility—
Dew point55°
Thu, 0549° / 46°0.27Light rain
49 °Light rain

St. Marys, Thursday, 5 November

Light rain. High 49°, low 46°.

Pressure29.74 inHg
Wind17.6 mph NW
Humidity91%
Visibility—
Dew point46°
Fri, 0648° / 40°0.04Light rain
48 °Light rain

St. Marys, Friday, 6 November

Light rain. High 48°, low 40°.

Pressure29.97 inHg
Wind15.8 mph N
Humidity70%
Visibility—
Dew point36°
Sat, 0749° / 34°0Clear
49 °Clear

St. Marys, Saturday, 7 November

Clear. High 49°, low 34°.

Pressure30.30 inHg
Wind5.7 mph NE
Humidity46%
Visibility—
Dew point25°
Sun, 0848° / 36°0Overcast
48 °Overcast

St. Marys, Sunday, 8 November

Overcast. High 48°, low 36°.

Pressure30.36 inHg
Wind6.8 mph S
Humidity55%
Visibility—
Dew point29°
Mon, 0953° / 40°0Overcast
53 °Overcast

St. Marys, Monday, 9 November

Overcast. High 53°, low 40°.

Pressure30.24 inHg
Wind7.3 mph SE
Humidity53%
Visibility—
Dew point33°
Tue, 1056° / 39°0Overcast
56 °Overcast

St. Marys, Tuesday, 10 November

Overcast. High 56°, low 39°.

Pressure30.21 inHg
Wind7.2 mph SW
Humidity59%
Visibility—
Dew point38°
Wed, 1158° / 44°0Mostly clear
58 °Mostly clear

St. Marys, Wednesday, 11 November

Mostly clear. High 58°, low 44°.

Pressure30.06 inHg
Wind12.4 mph S
Humidity65%
Visibility—
Dew point44°
Thu, 1260° / 49°0Overcast
60 °Overcast

St. Marys, Thursday, 12 November

Overcast. High 60°, low 49°.

Pressure29.56 inHg
Wind18.7 mph S
Humidity76%
Visibility—
Dew point48°
Fri, 1364° / 53°0.06Light rain
64 °Light rain

St. Marys, Friday, 13 November

Light rain. High 64°, low 53°.

Pressure29.29 inHg
Wind18.1 mph S
Humidity74%
Visibility—
Dew point55°

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.