January weather forecast
Cathan, WA

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Weather in January

January is a chilly winter month in Cathan, Washington, with an average temperature varying between 43.3°F (6.3°C) and 34.7°F (1.5°C).

Temperature

Shifting into January, Cathan records an average high-temperature of a chilly 43.3°F (6.3°C), presenting minor fluctuations compared to the previous month. Cathan registers a subtle dip to an average of 34.7°F (1.5°C) during the nights of January.

Humidity

The months with the highest humidity are January, February, November and December, with an average relative humidity of 85%.

Rainfall

In Cathan, in January, it is raining for 18.1 days, with typically 4.69" (119mm) of accumulated precipitation. Throughout the year, there are 188.6 rainfall days, and 34.92" (887mm) of precipitation is accumulated.

Snowfall

January through April, November and December are months with snowfall. In Cathan, in January, snow falls for 2.3 days, with typically accumulated 2.28" (58mm) of snow. Throughout the year, there are 11.6 snowfall days, and 9.61" (244mm) of snow is accumulated.

Daylight

The average length of the day in January is 8h and 54min.
On the first day of January, sunrise is at 7:59 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 5:06 pm PST.

Sunshine

The average sunshine in January is 4.2h.

UV index

January, February, October through December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for average individuals.
Note: The maximum daily UV index, 2 in January, converts into the following recommendations:
Those with sensitive skin, infants, and children require constant safeguarding from prolonged sun exposure. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Updated: Jul 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How cold is January?

January temperatures vary between a high-temperature of 43.3°F (6.3°C) and a low-temperature of 34.7°F (1.5°C).

What is the most humid month?

January, February, November and December, with an average relative humidity of 85%, are most humid months.

What is the average humidity in January in Cathan?

In January, the average relative humidity is 85%.

How much does it rain in January?

In January, the rain falls for 18.1 days. Throughout January, 4.69" (119mm) of precipitation is accumulated.

How many days does it snow in January?

In Cathan, in January, snow falls for 2.3 days, with typically accumulated 2.28" (58mm) of snow.

How many hours of daylight does Cathan have in January?

In Cathan, the average day length in January is 8h and 54min.

When is the sunrise / sunset in January?

In January, on the first day of the month, sunrise is at 7:59 am and sunset at 4:25 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 5:06 pm PST.

How many hours of sunshine does Cathan have in January?

In Cathan, the average sunshine duration in January is 4.2h.

When is the lowest UV index?

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

How high is the UV index in January?

In Cathan, the average daily maximum UV index in January is 2. A UV Index value of 2, and less, symbolizes a low health risk 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
Cathan, WA

Average temperature in January - Cathan, WA
  • Average high temperature in January: 43.3°F

The warmest month (with the highest average high temperature) is August (72.3°F).
The month with the lowest average high temperature is December (41.7°F).

  • Average low temperature in January: 34.7°F

The month with the highest average low temperature is August (51.6°F).
The coldest month (with the lowest average low temperature) is February (33.8°F).

Average pressure in January
Cathan, WA

Average pressure in January - Cathan, WA
  • Average pressure in January: 30.09"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is August (30"Hg).

Average wind speed in January
Cathan, WA

Average wind speed in January - Cathan, WA
  • Average wind speed in January: 5.6mph

The windiest months (with the highest average wind speed) are January and November (5.6mph).
The calmest month (with the lowest average wind speed) is August (3.3mph).

Average humidity in January
Cathan, WA

Average humidity in January - Cathan, WA
  • Average humidity in January: 85%

The months with the highest relative humidity are January, February, November and December (85%).
The month with the lowest relative humidity is July (73%).

Average rainfall in January
Cathan, WA

Average rainfall in January - Cathan, WA
  • Average rainfall in January: 4.69"

The wettest month (with the highest rainfall) is November (4.92").
The driest month (with the least rainfall) is July (0.51").

Average rainfall days in January
Cathan, WA

Average rainfall days in January - Cathan, WA
  • Average rainfall days in January: 18.1 days

The month with the highest number of rainy days is March (20.9 days).
The month with the least rainy days is August (6.9 days).

Average snowfall in January
Cathan, WA

Average snowfall in January - Cathan, WA
  • Average snowfall in January: 2.28"

The month with the highest snowfall is February (4.45").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in January
Cathan, WA

Average snowfall days in January - Cathan, WA
  • Average snowfall days in January: 2.3 days

The month with the highest number of snowfall days is February (4.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in January /
Average sunshine in January
Cathan, WA

Average daylight in January / Average sunshine in January - Cathan, WA
  • Average daylight in January: 8h and 5min

The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).

  • Average sunshine in January: 4h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 4h and 6min).

Average sunshine days in January
Cathan, WA

Average sunshine days in January - Cathan, WA
  • Average sunshine days in January: 10.4 days

The month with the most sunshine days is August (22 days).
The month with the least sunshine days is March (8.1 days).

Average UV index in January
Cathan, WA

Average UV index in January - Cathan, WA
  • Average UV index in January: 2

The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, October, November and December (UV index 2).

Average cloud cover in January
Cathan, WA

Average cloud cover in January - Cathan, WA
  • Average cloud cover in January: 56

The month with the most cloud cover is December (Cloud cover 57).
The months with the least cloud cover are July and August (Cloud cover 26).

Average visibility in January
Cathan, WA

Average visibility in January - Cathan, WA
  • Average visibility in January: 5mi

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

Cathan, Washington, USA

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