10-day forecast for Siam, IA: 38° to 78°, with precipitation expected on 2 days. The table below breaks each day into morning, afternoon, evening and overnight.
78°
Best day: Saturday, October 24
59° · 1 in
Worst day: Thursday, October 29
Tap any day below to see morning, afternoon, evening and overnight.
Sat, 2478° / 55°0
Morning56°feels 55°
Afternoon77°feels 76°
Evening68°feels 67°
Overnight59°feels 57°
78 °
Siam, Saturday, 24 October
Clear. High 78°, low 55°.
Pressure30.21 inHg
Wind11.2 mph S
Humidity46%
Visibility6.2 mi
Dew point50°
Sun, 2576° / 56°0
Morning56°feels 55°
Afternoon75°feels 74°
Evening66°feels 66°
Overnight61°feels 61°
76 °
Siam, Sunday, 25 October
Overcast. High 76°, low 56°.
Pressure30.30 inHg
Wind5.7 mph S
Humidity54%
Visibility6.2 mi
Dew point55°
Mon, 2675° / 57°0
Morning57°feels 57°
Afternoon74°feels 73°
Evening68°feels 67°
Overnight60°feels 59°
75 °
Siam, Monday, 26 October
Overcast. High 75°, low 57°.
Pressure30.27 inHg
Wind5.5 mph SE
Humidity55%
Visibility6.2 mi
Dew point54°
Tue, 2769° / 60°0
Morning63°feels 62°
Afternoon68°feels 67°
Evening66°feels 65°
Overnight63°feels 62°
69 °
Siam, Tuesday, 27 October
Overcast. High 69°, low 60°.
Pressure30.15 inHg
Wind10 mph SW
Humidity52%
Visibility—
Dew point49°
Wed, 2867° / 58°0.02
Morning61°feels 59°
Afternoon65°feels 64°
Evening59°feels 58°
Overnight59°feels 58°
67 °
Siam, Wednesday, 28 October
Light rain. High 67°, low 58°.
Pressure29.97 inHg
Wind15.8 mph NW
Humidity58%
Visibility—
Dew point50°
Thu, 2959° / 49°1
Morning57°feels 57°
Afternoon55°feels 54°
Evening51°feels 50°
Overnight51°feels 48°
59 °
Siam, Thursday, 29 October
Rain. High 59°, low 49°.
Pressure30.03 inHg
Wind13.7 mph SW
Humidity96%
Visibility—
Dew point55°
Fri, 3050° / 45°0.48
Morning49°feels 45°
Afternoon49°feels 44°
Evening46°feels 40°
Overnight46°feels 41°
50 °
Siam, Friday, 30 October
Rain. High 50°, low 45°.
Pressure29.91 inHg
Wind15.1 mph N
Humidity96%
Visibility—
Dew point48°
Sat, 3147° / 44°0
Morning45°feels 41°
Afternoon47°feels 43°
Evening45°feels 40°
Overnight44°feels 40°
47 °
Siam, Saturday, 31 October
Overcast. High 47°, low 44°.
Pressure30.03 inHg
Wind10.4 mph N
Humidity87%
Visibility—
Dew point43°
Sun, 0143° / 38°0
Morning39°feels 31°
Afternoon40°feels 33°
Evening41°feels 35°
Overnight40°feels 34°
43 °
Siam, Sunday, 1 November
Overcast. High 43°, low 38°.
Pressure30.21 inHg
Wind13.9 mph NW
Humidity84%
Visibility—
Dew point35°
About this forecast
How reliable is a 10-day forecast?
The first 3–5 days are the most reliable, typically within 2–4°. From day six to ten the models show the trend: the direction of change is right more often than the exact numbers.
What does the time-of-day table show?
Temperature in Siam, IA around 8am, 2pm, 8pm and 2am each day — handy for planning a walk, a drive or work outdoors.
How is the best day chosen?
We weigh the daytime high against precipitation: a warm, dry day scores highest.