Weather in Siam, IA
Siam, Saturday, 10 October, 18:41
Clear. Feels like 80°. High 87°, low 62°.
Monthly outlook for Siam, IA: average high 63.3°, average low 46.7°. That is 0.3° above the climate normal for October. Precipitation is expected on 4 days (about 2.2 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 10 October (86.9°), the coolest 18 October (25.6°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 10 October – 19 October | 66.1° | 63.6° | +1.4° |
| 20 October – 29 October | 58.5° | 60.1° | -0.9° |
| 30 October – 8 November | at normal | 54.6° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — New Market (7 mi).
0
Siam, Sunday, 11 October
Overcast. High 86°, low 63°.
0Siam, Monday, 12 October
Clear. High 86°, low 68°.
0.56
Siam, Tuesday, 13 October
Heavy rain. High 77°, low 60°.
0.08Siam, Wednesday, 14 October
Light rain. High 65°, low 59°.
1.37Siam, Thursday, 15 October
Heavy rain. High 62°, low 57°.
0
Siam, Friday, 16 October
Partly cloudy. High 57°, low 38°.
0
Siam, Saturday, 17 October
Mostly clear. High 40°, low 28°.
0Siam, Sunday, 18 October
Clear. High 46°, low 26°.
0Siam, Monday, 19 October
Overcast. High 56°, low 34°.
0Siam, Tuesday, 20 October
Clear. High 63°, low 41°.
0Siam, Wednesday, 21 October
Mostly clear. High 69°, low 48°.
0.15Siam, Thursday, 22 October
Rain. High 58°, low 47°.
0Siam, Friday, 23 October
Overcast. High 49°, low 41°.
0Siam, Saturday, 24 October
Clear. High 54°, low 37°.
0Siam, Sunday, 25 October
Overcast. High 58°, low 39°.
0.11Siam, Monday, 26 October
Climate normal for this date — 60-year average.
0.06Siam, Tuesday, 27 October
Climate normal for this date — 60-year average.
0.08Siam, Wednesday, 28 October
Climate normal for this date — 60-year average.
0.09Siam, Thursday, 29 October
Climate normal for this date — 60-year average.
0.13
Siam, Friday, 30 October
Climate normal for this date — 60-year average.
0.12Siam, Saturday, 31 October
Climate normal for this date — 60-year average.
0.18Siam, Sunday, 1 November
Climate normal for this date — 60-year average.
0.09Siam, Monday, 2 November
Climate normal for this date — 60-year average.
0.11Siam, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.08Siam, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.05Siam, Thursday, 5 November
Climate normal for this date — 60-year average.
0.06Siam, Friday, 6 November
Climate normal for this date — 60-year average.
0.02Siam, Saturday, 7 November
Climate normal for this date — 60-year average.
0.05Siam, Sunday, 8 November
Climate normal for this date — 60-year average.
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 Siam, 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 Siam, 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.
Sun and moon today
Weather history
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