January weather forecast
Rockdale, IA

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Weather in January

January, the same as December, in Rockdale, Iowa, is another subzero cold winter month, with an average temperature varying between 12.4°F (-10.9°C) and 25°F (-3.9°C).

Temperature

Rockdale's January weather, with an average high temperature of 25°F (-3.9°C) and an average low temperature of 12.4°F (-10.9°C), tends to be the coldest of the year.

Humidity

January and February, with an average relative humidity of 87%, are the most humid months.

Rainfall

January and February are months with the least rain when the rain falls for 4.8 days and typically aggregates up to 1.14" (29mm) of rain.

Snowfall

January through April, October through December are months with snowfall. January is the month with the most snowfall. Snow falls for 12.8 days and accumulates 4.88" (124mm) of snow.

Daylight

In January, the average length of the day is 9h and 29min.
On the first day of the month, sunrise is at 7:32 am and sunset at 4:40 pm. On the last day of January, sunrise is at 7:17 am and sunset at 5:14 pm CST.

Sunshine

With an average of 3.5h of sunshine, January has the least sunshine of the year.

UV index

January, November and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.
Note: The maximum daily UV index, 1 in January, converts into the following recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.

Frequently asked questions

What time of the year is the coldest?

In Rockdale, January records the average lowest temperatures, peaking at 25°F (-3.9°C) and reaching a low of 12.4°F (-10.9°C).

How cold is it in January?

In January, in Rockdale, the average high-temperature is 25°F (-3.9°C), and the average low-temperature is 12.4°F (-10.9°C).

What are the most humid months in Rockdale?

The months with the highest humidity in Rockdale are January and February, with an average relative humidity of 87%.

What is the average humidity in January?

The average relative humidity in January is 87%.

What is the driest month?

January and February are months with the least rain when the rain falls for 4.8 days and typically aggregates up to 1.14" (29mm) of rain.

How much does it rain in January?

In January, in Rockdale, the rain falls for 4.8 days. Throughout January, 1.14" (29mm) of precipitation is accumulated.

When does it snow the most?

The month with the most snowfall is January, when snow falls for 12.8 days and typically aggregates up to 4.88" (124mm) of snow.

How much does it snow in January?

In Rockdale, in January, snow falls for 12.8 days, with typically accumulated 4.88" (124mm) of snow.

What is the average length of the day in January?

In Rockdale, the average day length in January is 9h and 29min.

What time are sunrise and sunset in January?

On the first day of January, sunrise is at 7:32 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 5:14 pm CST.

What is the month with the least sunshine?

January has the least sunshine of the year, with an average of 3.5h of sunshine.

How many hours of sunshine does Rockdale have in January?

In Rockdale, Iowa, the average sunshine duration in January is 3.5h.

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

The months with the lowest UV index are January, November and December, with an average maximum UV index of 1.

How high is the UV index in January?

The average daily maximum UV index in January is 1. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Rockdale, IA

Average temperature in January - Rockdale, IA
  • Average high temperature in January: 25°F

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (25°F).

  • Average low temperature in January: 12.4°F

The month with the highest average low temperature is July (62.8°F).
The coldest month (with the lowest average low temperature) is January (12.4°F).

Average pressure in January
Rockdale, IA

Average pressure in January - Rockdale, IA
  • Average pressure in January: 30.13"Hg

The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in January
Rockdale, IA

Average wind speed in January - Rockdale, IA
  • Average wind speed in January: 10.2mph

The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.8mph).

Average humidity in January
Rockdale, IA

Average humidity in January - Rockdale, IA
  • Average humidity in January: 87%

The months with the highest relative humidity are January and February (87%).
The month with the lowest relative humidity is October (76%).

Average rainfall in January
Rockdale, IA

Average rainfall in January - Rockdale, IA
  • Average rainfall in January: 1.14"

The wettest months (with the highest rainfall) are May and June (3.7").
The driest months (with the least rainfall) are January and February (1.14").

Average rainfall days in January
Rockdale, IA

Average rainfall days in January - Rockdale, IA
  • Average rainfall days in January: 4.8 days

The month with the highest number of rainy days is May (17.7 days).
The month with the least rainy days is February (4.4 days).

Average snowfall in January
Rockdale, IA

Average snowfall in January - Rockdale, IA
  • Average snowfall in January: 4.88"

The month with the highest snowfall is January (4.88").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in January
Rockdale, IA

Average snowfall days in January - Rockdale, IA
  • Average snowfall days in January: 12.8 days

The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in January / Average sunshine in January - Rockdale, IA
  • Average daylight in January: 9h and 3min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in January: 3h and 3min

The months with the most sunshine are July and August (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).

Average sunshine days in January
Rockdale, IA

Average sunshine days in January - Rockdale, IA
  • Average sunshine days in January: 15.7 days

The months with the most sunshine days are November and December (17.5 days).
The month with the least sunshine days is June (10.3 days).

Average UV index in January
Rockdale, IA

Average UV index in January - Rockdale, IA
  • Average UV index in January: 1

The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).

Average cloud cover in January
Rockdale, IA

Average cloud cover in January - Rockdale, IA
  • Average cloud cover in January: 63

The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).

Average visibility in January
Rockdale, IA

Average visibility in January - Rockdale, IA
  • Average visibility in January: 5mi

The months with the highest visibility are February, March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January and July (5mi).

Rockdale, Iowa, USA

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