Hecla, Sunday, 11 October, 05:52
Overcast. Feels like 53°. High 62°, low 46°.
Hecla, Monday, 12 October
Rain. High 59°, low 44°.
Hecla, Tuesday, 13 October
Light rain. High 54°, low 46°.
Hecla, Wednesday, 14 October
Clear. High 57°, low 40°.
Hecla, Thursday, 15 October
Overcast. High 60°, low 44°.
Hecla, Friday, 16 October
Clear. High 54°, low 38°.
Hecla, Saturday, 17 October
Clear. High 44°, low 24°.
Hecla, Sunday, 18 October
Overcast. High 58°, low 36°.
Hecla, Monday, 19 October
Partly cloudy. High 66°, low 44°.
Hecla, Tuesday, 20 October
Partly cloudy. High 68°, low 48°.
Hecla, Wednesday, 21 October
Overcast. High 63°, low 49°.
Hecla, Thursday, 22 October
Mostly clear. High 59°, low 38°.
Hecla, Friday, 23 October
Light rain. High 67°, low 45°.
Hecla, Saturday, 24 October
Light rain. High 49°, low 46°.
Hecla, Sunday, 25 October
Overcast. High 62°, low 37°.
Hecla, Monday, 26 October
Partly cloudy. High 56°, low 37°.
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.