Weather in St. Mary's, CO
St. Mary's, Saturday, 8 August, 23:38
Overcast. Feels like 55°. High 74°, low 44°.
0.06
St. Mary's, Sunday, 9 August
Light rain. High 72°, low 45°.
0
St. Mary's, Monday, 10 August
Clear. High 70°, low 41°.
0.02St. Mary's, Tuesday, 11 August
Light rain. High 69°, low 44°.
0.56St. Mary's, Wednesday, 12 August
Rain. High 70°, low 44°.
0.71St. Mary's, Thursday, 13 August
Rain. High 60°, low 41°.
0.21St. Mary's, Friday, 14 August
Light rain. High 58°, low 44°.
0.6St. Mary's, Saturday, 15 August
Rain. High 59°, low 41°.
0.03St. Mary's, Sunday, 16 August
Light rain. High 61°, low 41°.
0.09St. Mary's, Monday, 17 August
Light rain. High 64°, low 42°.
0St. Mary's, Tuesday, 18 August
Clear. High 67°, low 43°.
0.5St. Mary's, Wednesday, 19 August
Rain. High 64°, low 43°.
0.19St. Mary's, Thursday, 20 August
Light rain. High 60°, low 41°.
0.47St. Mary's, Friday, 21 August
Rain. High 61°, low 41°.
0
St. Mary's, Saturday, 22 August
Partly cloudy. High 65°, low 40°.
0.02St. Mary's, Sunday, 23 August
Light rain. High 62°, low 43°.
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. Mary's, CO 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. Mary's, CO 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.
Sun and moon today
Weather history
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