Grand Rapids
Michigan, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Grand Rapids, MI

The vast cityscape of Grand Rapids, a moderately large town in Michigan, and two visible bridges across the river, on a warm and cool, cloudy day
The vast cityscape of Grand Rapids, a moderately large town in Michigan, and two visible bridges across the river, on a warm and cool, cloudy day
January, like December, is a freezing cold winter month in Grand Rapids, Michigan, with average temperature varying between 18.7°F (-7.4°C) and 27.7°F (-2.4°C).

Temperature

With an average high-temperature of 27.7°F (-2.4°C) and an average low-temperature of 18.7°F (-7.4°C), January is the coldest month.

Humidity

With an average relative humidity of 87%, January is the most humid month in Grand Rapids.

Rainfall

In Grand Rapids, Michigan, during 4.2 rainfall days, 0.55" (14mm) of precipitation is typically accumulated. Throughout the year, there are 103.5 rainfall days, and 9.02" (229mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. The month with the most snowfall in Grand Rapids is January when snow falls for 11.5 days and typically aggregates up to 1.57" (40mm) of snow.

Daylight

In Grand Rapids, the average length of the day is 9.4h.

Sunshine

With an average of 2.3h of sunshine, January has the least sunshine of the year.

UV index

Months with the lowest UV index in Grand Rapids are January and December, with an average maximum UV index of 1. A UV Index value of 2, and less, symbolizes a minimal health hazard from the exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 1 in January transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the coldest month in Grand Rapids?

With an average high-temperature of 27.7°F (-2.4°C) and an average low-temperature of 18.7°F (-7.4°C), January is the coldest month in Grand Rapids, Michigan.

What is the temperature in January in Grand Rapids?

In Grand Rapids, Michigan, in January, the average high-temperature is 27.7°F (-2.4°C), and the average low-temperature is 18.7°F (-7.4°C).

What is the most humid month in Grand Rapids?

January is the most humid month in Grand Rapids, Michigan, with an average relative humidity of 87%.

What is the average humidity in January in Grand Rapids?

In Grand Rapids, Michigan, the average relative humidity in January is 87%.

How many days does it rain in January in Grand Rapids?

In January, in Grand Rapids, Michigan, the rain falls for 4.2 days. Throughout January, 0.55" (14mm) of precipitation is accumulated.

How many days does it snow in January in Grand Rapids?

In Grand Rapids, during January, snow falls for 11.5 days and regularly aggregates up to 1.57" (40mm) of snow.

What is the snowiest month in Grand Rapids?

The month with the most snowfall in Grand Rapids is January when snow falls for 11.5 days and typically aggregates up to 1.57" (40mm) of snow.

How many hours of daylight does Grand Rapids have in January?

In Grand Rapids, Michigan, the average length of the day in January is 9.4h.

What is the month with the least sunshine in Grand Rapids?

The month with the least sunshine in Grand Rapids, Michigan, is January, with an average of 2.3h of sunshine.

How many hours of sunshine does Grand Rapids have in January?

In Grand Rapids, Michigan, the average sunshine in January is 2.3h.

When is the lowest UV index in Grand Rapids?

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Grand Rapids, Michigan.

What is the UV index reading in January in Grand Rapids?

The average daily maximum UV index in January in Grand Rapids, Michigan, is 1. A UV Index estimate of 2, and below, represents a low health threat from the exposure to the Sun's UV radiation.
Average temperature in January - Grand Rapids, MI
  • Average high temperature in January: 27.7°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 (27.7°F).

  • Average low temperature in January: 18.7°F

The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).

Average humidity in January - Grand Rapids, MI
  • Average humidity in January: 87%

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is April (75%).

Average rainfall in January - Grand Rapids, MI
  • Average rainfall in January: 0.55"

The wettest month (with the highest rainfall) is May (1.14").
The driest month (with the lowest rainfall) is March (0.47").

Average rainfall days in January - Grand Rapids, MI
  • Average rainfall days in January: 4.2 days

The month with the highest number of rainy days is May (13 days).
The month with the lowest number of rainy days is February (3.8 days).

Average snowfall in January - Grand Rapids, MI
  • Average snowfall in January: 1.57"

The month with the highest snowfall is January (1.57").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average snowfall days in January - Grand Rapids, MI
  • Average snowfall days in January: 11.5 days

The month with the highest number of snowfall days is January (11.5 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

Average daylight in January / Average sunshine in January - Grand Rapids, MI
  • Average daylight in January: 9.4h

The month with the longest days is June (Average daylight: 15.3h).
The month with shortest days is December (Average daylight: 9.1h).

  • Average sunshine in January: 2.3h

The month with most sunshine is July (Average sunshine: 10.3h).
The month with least sunshine is January (Average sunshine: 2.3h).

Average UV index in January - Grand Rapids, MI
  • Average UV index in January: 1

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 1).