January weather forecast and climate
Riley, KS

January, like December, in Riley, Kansas, is another cold winter month, with average temperature ranging between min 23°F (-5°C) and max 38.8°F (3.8°C).

Temperature

With an average high-temperature of 38.8°F (3.8°C) and an average low-temperature of 23°F (-5°C), January is the coldest month.

Humidity

The average relative humidity in Riley, Kansas, is 71%.

Rainfall

The month with the least rainfall is January when the rain falls for 3.7 days and typically collects 0.63" (16mm) of precipitation.

Snowfall

Months with snowfall in Riley are January through April, October through December. In Riley, during January, snow falls for 4.3 days and regularly aggregates up to 1.34" (34mm) of snow. Throughout the year, there are 17.5 snowfall days, and 7.32" (186mm) of snow is accumulated.

Daylight

The average length of the day in Riley is 9.8h.

Sunshine

In Riley, the average sunshine is 5.8h.

UV index

Months with the lowest UV index in Riley, Kansas, are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from the exposure to the Sun's UV radiation for the average person.
Note: In January, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the coldest month in Riley?

January is the coldest month, with an average high-temperature of 38.8°F (3.8°C) and an average low-temperature of 23°F (-5°C).

What is the temperature in January in Riley?

In January, the average high-temperature is 38.8°F (3.8°C), and the average low-temperature is 23°F (-5°C).

What is the average humidity in January in Riley?

The average relative humidity in January is 71%.

How much does it rain in Riley in January?

In Riley, Kansas, during January, the rain falls for 3.7 days and regularly aggregates up to 0.63" (16mm) of precipitation.

What is the driest month in Riley?

The month with the least rainfall in Riley is January when the rain falls for 3.7 days and typically collects 0.63" (16mm) of precipitation.

How much does it snow in Riley in January?

In January, it is snowing for 4.3 days. Throughout January, 1.34" (34mm) of snow is accumulated.

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

In January, the average length of the day in Riley is 9.8h.

How long on average sun shines in January in Riley?

In Riley, Kansas, the average sunshine in January is 5.8h.

What is the month with the lowest UV index in Riley?

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

What is the UV index intensity in January in Riley?

In January, the average daily maximum UV index in Riley is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in January - Riley, KS
  • Average high temperature in January: 38.8°F

The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in January: 23°F

The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (23°F).

Average pressure in January - Riley, KS
  • Average pressure in January: 30.16"

The month with the highest atmospheric pressure is January (30.16").
The month with the lowest atmospheric pressure is June (29.85").

Average wind speed in January - Riley, KS
  • Average wind speed in January: 10.2mph

The windiest month (with the highest average wind speed) is April (11.8mph).
The calmest month (with the lowest average wind speed) is August (8.6mph).

Average humidity in January - Riley, KS
  • Average humidity in January: 71%

The month with the highest relative humidity is May (74%).
The month with the lowest relative humidity is October (64%).

Average rainfall in January - Riley, KS
  • Average rainfall in January: 0.63"

The wettest month (with the highest rainfall) is May (3.98").
The driest month (with the least rainfall) is January (0.63").

Average rainfall days in January - Riley, KS
  • Average rainfall days in January: 3.7 days

The month with the highest number of rainy days is May (14.3 days).
The month with the least rainy days is January (3.7 days).

Average snowfall in January - Riley, KS
  • Average snowfall in January: 1.34"

The month with the highest snowfall is February (2.24").
Months with the least snowfall are May, June, July, August and September (0").

Average snowfall days in January - Riley, KS
  • Average snowfall days in January: 4.3 days

The month with the highest number of snowfall days is February (4.8 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in January / Average sunshine in January - Riley, KS
  • Average daylight in January: 9.8h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in January: 5.8h

Months with the most sunshine are June and July (Average sunshine: 10.9h).
The month with the least sunshine is December (Average sunshine: 5.7h).

Average sunshine days in January - Riley, KS
  • Average sunshine days in January: 23.5 days

The month with the most sunshine days is January (23.5 days).
The month with the least sunshine days is May (13.8 days).

Average UV index in January - Riley, KS
  • Average UV index in January: 2

The month with the highest UV index is June (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in January - Riley, KS
  • Average cloud cover in January: 36

The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is June (Cloud cover 22).

Average visibility in January - Riley, KS
  • Average visibility in January: 6mi

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