Weather in Siam, IA
Siam, Friday, 9 October, 05:40
Clear. Feels like 62°. High 87°, low 63°.
Monthly outlook for Siam, IA: average high 70.7°, average low 52.6°. That is 4.2° above the climate normal for October. Precipitation is expected on 4 days (about 1.3 inches), against a normal of 4 days and 1.4 inches. The warmest day looks like 12 October (87.9°), the coolest 18 October (35.7°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 9 October – 18 October | 73.6° | 64° | +5.4° |
| 19 October – 28 October | 65.8° | 60.4° | +3° |
| 29 October – 7 November | at normal | 55.1° | — |
October records over 66 years
Climate normals and records are computed from the nearest reference point — New Market (7 mi).
0
Siam, Saturday, 10 October
Clear. High 86°, low 66°.
0Siam, Sunday, 11 October
Clear. High 84°, low 63°.
0Siam, Monday, 12 October
Clear. High 88°, low 71°.
0.13
Siam, Tuesday, 13 October
Light rain. High 80°, low 65°.
0.58Siam, Wednesday, 14 October
Rain. High 77°, low 69°.
0.43Siam, Thursday, 15 October
Rain. High 73°, low 54°.
0Siam, Friday, 16 October
Clear. High 52°, low 44°.
0Siam, Saturday, 17 October
Clear. High 50°, low 37°.
0Siam, Sunday, 18 October
Clear. High 58°, low 36°.
0
Siam, Monday, 19 October
Mostly clear. High 63°, low 42°.
0Siam, Tuesday, 20 October
Clear. High 65°, low 43°.
0Siam, Wednesday, 21 October
Clear. High 67°, low 45°.
0Siam, Thursday, 22 October
Clear. High 68°, low 48°.
0Siam, Friday, 23 October
Mostly clear. High 66°, low 48°.
0
Siam, Saturday, 24 October
Overcast. High 66°, low 47°.
0.04Siam, Sunday, 25 October
Climate normal for this date — 60-year average.
0.11
Siam, 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.
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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