January weather forecast
Siam, IA

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Weather in January

January, like December, is another subzero cold winter month in Siam, Iowa, with temperature in the range of an average high of 31.1°F (-0.5°C) and an average low of 17.2°F (-8.2°C).

Temperature

The coldest month is January, with an average high-temperature of 31.1°F (-0.5°C) and an average low-temperature of 17.2°F (-8.2°C).

Humidity

January is the most humid month, with an average relative humidity of 80%.

Rainfall

In Siam, in January, during 3.8 rainfall days, 0.51" (13mm) of precipitation is typically accumulated. Throughout the year, in Siam, there are 114.9 rainfall days, and 18.39" (467mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall in Siam, Iowa. January is the month with the most snowfall. Snow falls for 7.8 days and accumulates 2.17" (55mm) of snow.

Daylight

In January, the average length of the day is 9h and 40min.
On the first day of January, sunrise is at 7:43 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 5:35 pm CST.

Sunshine

The month with the least sunshine is January, with an average of 4.6h of sunshine.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index of 2 in January converts into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
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Frequently asked questions

What is the coldest month in Siam?

Siam's coldest month, January, registers temperatures that range from a high of 31.1°F (-0.5°C) to a low of 17.2°F (-8.2°C).

How cold is it in Siam in January?

The average high-temperature, in January, in Siam, is 31.1°F (-0.5°C), while the average low-temperature is 17.2°F (-8.2°C).

What is the most humid month in Siam?

The most humid month in Siam, Iowa, is January, with an average relative humidity of 80%.

What is the average humidity in January in Siam?

The average relative humidity in January in Siam, Iowa, is 80%.

How much does it rain in Siam in January?

In Siam, in January, during 3.8 rainfall days, 0.51" (13mm) of precipitation is typically accumulated.

What is the snowiest month in Siam?

January is the month with the most snowfall in Siam, Iowa. Snow falls for 7.8 days and accumulates 2.17" (55mm) of snow.

How many days does it snow in January in Siam?

In Siam, Iowa, in January, snow falls for 7.8 days, with typically accumulated 2.17" (55mm) of snow.

What is the average length of the day in January in Siam?

In Siam, the average day length in January is 9h and 40min.

When is the sunrise / sunset in January in Siam?

On the first day of January, sunrise is at 7:43 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 5:35 pm CST.

What is the month with the least sunshine in Siam?

With an average of 4.6h of sunshine, January has the least sunshine of the year in Siam.

How many hours of sunshine does Siam have in January?

In January, the average sunshine duration in Siam is 4.6h.

What are the months with the lowest UV index in Siam?

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the UV index reading in January in Siam?

In January, the average daily maximum UV index is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to UV radiation.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
35.2°F 1.8°C
31.1°F -0.5°C
35.2°F 1.8°C
Average low temperature
22.8°F -5.1°C
17.2°F -8.2°C
20.7°F -6.3°C
Average pressure
30.13" 765mmHg
30.16" 766mmHg
30.14" 766mmHg
Average wind speed
9.5mph 15.3km/h
9.9mph 15.9km/h
10mph 16.1km/h
Average max. wind speed
10.3mph 16.6km/h
10.6mph 17.1km/h
10.7mph 17.2km/h
Average wind speed gusts
15.3mph 24.6km/h
16mph 25.7km/h
15.8mph 25.4km/h
Average humidity
78%
80%
78%
Average rainfall
0.59" 15mm
0.51" 13mm
0.43" 11mm
Average rainfall days
4.3
3.8
3.4
Average snowfall
0.91" 23mm
2.17" 55mm
1.69" 43mm
Average snowfall days
4.5
7.8
6.9
Average daylight
9h 2min
9h 4min
10h 4min
Average sunshine
5h 0min
4h 4min
5h 3min
Average sunshine days
22
21.1
18.8
Average UV index
2
2
2
Average cloud cover
45%
49%
46%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Siam, IA

Average temperature in January - Siam, IA
  • Average high temperature in January: 31.1°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (31.1°F).

  • Average low temperature in January: 17.2°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (17.2°F).

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Average pressure in January
Siam, IA

Average pressure in January - Siam, IA
  • Average pressure in January: 30.16"Hg

The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

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Average wind speed in January
Siam, IA

Average wind speed in January - Siam, IA
  • Average wind speed in January: 9.9mph

The windiest month (with the highest average wind speed) is March (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).

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Average humidity in January
Siam, IA

Average humidity in January - Siam, IA
  • Average humidity in January: 80%

The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is October (69%).

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Average rainfall in January
Siam, IA

Average rainfall in January - Siam, IA
  • Average rainfall in January: 0.51"

The wettest month (with the highest rainfall) is June (3.39").
The driest month (with the least rainfall) is February (0.43").

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Average rainfall days in January
Siam, IA

Average rainfall days in January - Siam, IA
  • Average rainfall days in January: 3.8 days

The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is February (3.4 days).

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Average snowfall in January
Siam, IA

Average snowfall in January - Siam, IA
  • Average snowfall in January: 2.17"

The month with the highest snowfall is January (2.17").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in January
Siam, IA

Average snowfall days in January - Siam, IA
  • Average snowfall days in January: 7.8 days

The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in January /
Average sunshine in January
Siam, IA

Average daylight in January / Average sunshine in January - Siam, IA
  • Average daylight in January: 9h and 4min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in January: 4h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).

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Average sunshine days in January
Siam, IA

Average sunshine days in January - Siam, IA
  • Average sunshine days in January: 21.1 days

The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is June (12.3 days).

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Average UV index in January
Siam, IA

Average UV index in January - Siam, IA
  • Average UV index in January: 2

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in January
Siam, IA

Average cloud cover in January - Siam, IA
  • Average cloud cover in January: 49

The month with the most cloud cover is January (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 27).

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Average visibility in January
Siam, IA

Average visibility in January - Siam, IA
  • Average visibility in January: 6mi

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).

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Siam, Iowa, USA

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