January weather forecast
Hillsboro, IA

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Weather in January

January, like December, is a freezing cold winter month in Hillsboro, Iowa, with an average temperature varying between 29.7°F (-1.3°C) and 17.4°F (-8.1°C).

Temperature

January is the month when Hillsboro sees the lowest average temperatures, with a high of 29.7°F (-1.3°C) and a low of 17.4°F (-8.1°C).

Humidity

In January, the average relative humidity is 81%.

Rainfall

In January, the rain falls for 5.3 days. Throughout January, 1.42" (36mm) of precipitation is accumulated. Throughout the year, there are 140.1 rainfall days, and 29.92" (760mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. January is the month with the most snowfall in Hillsboro, Iowa. Snow falls for 9.6 days and accumulates 4.76" (121mm) of snow.

Daylight

In Hillsboro, the average length of the day in January is 9h and 38min.
On the first day of the month, sunrise is at 7:31 am and sunset at 4:49 pm. On the last day of January, sunrise is at 7:18 am and sunset at 5:22 pm CST.

Sunshine

The month with the least sunshine is January, with an average of 4h of sunshine.

UV index

January is the month with the lowest UV index, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the average person.
Note: The UV index of 1 in January translates into these instructions:
Protection from prolonged sun exposure is necessary for babies, children, and individuals with sensitive skin. When the Sun is at its strongest around midday, find shade and limit exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days. Be watchful! The reflection of snow can enhance the intensity of the Sun's UV radiation nearly double.

Frequently asked questions

What is the coldest month in Hillsboro?

January, on average, is the coldest month, registering a high temperature of 29.7°F (-1.3°C) and a low of 17.4°F (-8.1°C).

How cold is it in January?

An average high-temperature, in January, in Hillsboro, is 29.7°F (-1.3°C) and the average low-temperature is 17.4°F (-8.1°C).

What is the average humidity in January?

The average relative humidity in January is 81%.

How many days does it rain in January?

In Hillsboro, in January, it is raining for 5.3 days, with typically 1.42" (36mm) of accumulated precipitation.

What is the snowiest month?

The month with the most snowfall is January, when snow falls for 9.6 days and typically aggregates up to 4.76" (121mm) of snow.

How many days does it snow in January?

In Hillsboro, in January, during 9.6 snowfall days, 4.76" (121mm) of snow is typically accumulated.

How many hours of daylight does Hillsboro have in January?

In January, the average day length is 9h and 38min.

When is the sunrise / sunset in January?

In January, on the first day of the month, sunrise is at 7:31 am and sunset at 4:49 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 5:22 pm CST.

What is the month with the least sunshine?

The month with the least sunshine is January, with an average of 4h of sunshine.

How many hours of sunshine does Hillsboro have in January?

In Hillsboro, the average sunshine duration in January is 4h.

What is the month with the lowest UV index?

With an average maximum UV index of 1, January is the month with the lowest UV index.

How high is the UV index in January?

In Hillsboro, Iowa, the average daily maximum UV index in January is 1. A UV Index reading of 2, and below, represents a low health threat from unsafe exposure to Sun's UV rays.
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
Hillsboro, IA

Average temperature in January - Hillsboro, IA
  • Average high temperature in January: 29.7°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in January: 17.4°F

The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).

Average pressure in January
Hillsboro, IA

Average pressure in January - Hillsboro, IA
  • Average pressure in January: 30.15"Hg

The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).

Average wind speed in January
Hillsboro, IA

Average wind speed in January - Hillsboro, IA
  • Average wind speed in January: 10.7mph

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6.9mph).

Average humidity in January
Hillsboro, IA

Average humidity in January - Hillsboro, IA
  • Average humidity in January: 81%

The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).

Average rainfall in January
Hillsboro, IA

Average rainfall in January - Hillsboro, IA
  • Average rainfall in January: 1.42"

The wettest month (with the highest rainfall) is May (4.29").
The driest months (with the least rainfall) are February and December (1.38").

Average rainfall days in January
Hillsboro, IA

Average rainfall days in January - Hillsboro, IA
  • Average rainfall days in January: 5.3 days

The month with the highest number of rainy days is May (18.3 days).
The month with the least rainy days is February (4.6 days).

Average snowfall in January
Hillsboro, IA

Average snowfall in January - Hillsboro, IA
  • Average snowfall in January: 4.76"

The month with the highest snowfall is January (4.76").
The months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in January
Hillsboro, IA

Average snowfall days in January - Hillsboro, IA
  • Average snowfall days in January: 9.6 days

The month with the highest number of snowfall days is January (9.6 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
Hillsboro, IA

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

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in January: 4h

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

Average sunshine days in January
Hillsboro, IA

Average sunshine days in January - Hillsboro, IA
  • Average sunshine days in January: 16.2 days

The month with the most sunshine days is October (18.4 days).
The month with the least sunshine days is May (10.6 days).

Average UV index in January
Hillsboro, IA

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

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

Average cloud cover in January
Hillsboro, IA

Average cloud cover in January - Hillsboro, IA
  • Average cloud cover in January: 56

The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are July, August and September (Cloud cover 31).

Average visibility in January
Hillsboro, IA

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

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

Hillsboro, Iowa, USA

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