Rumsey, Friday, 9 October, 13:05
Overcast. Feels like 64°. High 67°, low 35°.
Rumsey, Saturday, 10 October
Snow. High 40°, low 25°.
Rumsey, Sunday, 11 October
Snow. High 37°, low 22°.
Rumsey, Monday, 12 October
Light snow. High 41°, low 29°.
Rumsey, Tuesday, 13 October
Clear. High 47°, low 28°.
Rumsey, Wednesday, 14 October
Overcast. High 51°, low 30°.
Rumsey, Thursday, 15 October
Clear. High 53°, low 33°.
Rumsey, Friday, 16 October
Overcast. High 58°, low 26°.
Rumsey, Saturday, 17 October
Overcast. High 63°, low 41°.
Rumsey, Sunday, 18 October
Overcast. High 64°, low 44°.
Rumsey, Monday, 19 October
Overcast. High 62°, low 43°.
Rumsey, Tuesday, 20 October
Clear. High 51°, low 35°.
Rumsey, Wednesday, 21 October
Overcast. High 57°, low 36°.
Rumsey, Thursday, 22 October
Overcast. High 54°, low 32°.
Rumsey, Friday, 23 October
Clear. High 66°, low 38°.
Rumsey, Saturday, 24 October
Clear. High 67°, low 43°.
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 Rumsey, MT 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 Rumsey, MT 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.