Hecla, Saturday, 10 October, 10:27
Partly cloudy. Feels like 68°. High 85°, low 57°.
Hecla, Sunday, 11 October
Overcast. High 63°, low 46°.
Hecla, Monday, 12 October
Light rain. High 54°, low 42°.
Hecla, Tuesday, 13 October
Overcast. High 53°, low 46°.
Hecla, Wednesday, 14 October
Clear. High 58°, low 43°.
Hecla, Thursday, 15 October
Light rain. High 58°, low 41°.
Hecla, Friday, 16 October
Overcast. High 46°, low 30°.
Hecla, Saturday, 17 October
Clear. High 40°, low 25°.
Hecla, Sunday, 18 October
Overcast. High 52°, low 32°.
Hecla, Monday, 19 October
Partly cloudy. High 66°, low 39°.
Hecla, Tuesday, 20 October
Light rain. High 62°, low 48°.
Hecla, Wednesday, 21 October
Light rain. High 53°, low 44°.
Hecla, Thursday, 22 October
Clear. High 58°, low 40°.
Hecla, Friday, 23 October
Overcast. High 53°, low 34°.
Hecla, Saturday, 24 October
Overcast. High 58°, low 40°.
Hecla, Sunday, 25 October
Overcast. High 43°, low 30°.
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 Hecla, SD are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
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.
They are real temperature extremes recorded in Hecla, SD since 1960: the highest and lowest reading for each calendar date, with the year it happened.
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.