January weather - Winter 2025

Weather in January
Frequently asked questions
Average temperature in January
Average pressure in January
Average wind speed in January
Average humidity in January
Average rainfall in January
Average rainfall days in January
Average snowfall in January
Average snowfall days in January
Average daylight in January
Average sunshine in January
Average sunshine days in January
Average UV index in January
Average cloud cover in January
Average visibility in January

The pink sunrise sky over the iconic Pasco Bridge across the glassy calm waters near Pasco, Washington

Weather in January

The winter chill continues into January in Pasco, Washington, making it the coldest month of the year on record. Expect layers of clothing and heated rooms indispensable for January nights. Snowfall is infrequent but possible with 0.94" (24mm) average being recorded. Compared to later months, daylight durations are short, thus limiting outdoor activities. However, January bears the brunt of winter and it anticipates a gradual transition to warmer temperatures in the coming months.

Temperature

The average high-temperature for January is a still cold 39°F (3.9°C), closely aligning with the temperature of the preceding month. Throughout January, the average low-temperature dips to a freezing cold 28.8°F (-1.8°C).

Humidity

The most humid month is January, with an average relative humidity of 80%.

Rainfall

January is the month with the most rainfall. Rain falls for 11.4 days and accumulates 0.94" (24mm) of precipitation.

Snowfall

Months with snowfall are January through March, November and December. In Pasco, Washington, during January, snow falls for 2.3 days and regularly aggregates up to 0.94" (24mm) of snow. Throughout the year, there are 11 snowfall days, and 4.53" (115mm) of snow is accumulated.

Daylight

In January, the average length of the day is 9h and 7min.
On the first day of the month, sunrise is at 7:39 am and sunset at 4:20 pm. On the last day of January, sunrise is at 7:20 am and sunset at 4:59 pm PST.

Sunshine

January has the least sunshine of the year, with an average of 5.4h of sunshine.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The maximum daily UV index, 2 in January, converts into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.

Updated: Jun 8, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Is it cold during January?

The high-temperature during January is 39°F (3.9°C) and the low-temperature is 28.8°F (-1.8°C).

What is the most humid month?

With an average relative humidity of 80%, January is the most humid month.

What is the average humidity in January?

The average relative humidity in January is 80%.

What is the rainiest month?

January is the month with the most rainfall. Rain falls for 11.4 days and accumulates 0.94" (24mm) of precipitation.

How many days does it rain in January?

In January, the rain falls for 11.4 days. Throughout January, 0.94" (24mm) of precipitation is accumulated.

How much does it snow in January?

In January, it is snowing for 2.3 days. Throughout January, 0.94" (24mm) of snow is accumulated.

How many hours of daylight does Pasco have in January?

In January, the average day length is 9h and 7min.

When are sunrise and sunset in January?

In January, on the first day of the month, sunrise is at 7:39 am and sunset at 4:20 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:59 pm PST.

What is the month with the least sunshine?

The month with the least sunshine is January, with an average of 5.4h of sunshine.

How many hours of sunshine does Pasco have in January?

In January, the average sunshine duration is 5.4h.

What is the month with the lowest UV index?

January, February, November and 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 Pasco, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year January F M A M J J A S O N D

Dec

January

Feb

Average high temperature

37.8°F 3.2°C

39°F 3.9°C

44.8°F 7.1°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

6.4mph 10.3km/h

6.8mph 10.9km/h

7.6mph 12.2km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

17.2

16.3

14.7

Average UV index

Average cloud cover

Average visibility

Average temperature in January
Pasco, WA

Average high temperature in January: 39°F

The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is December (37.8°F).

Average low temperature in January: 28.8°F

The month with the highest average low temperature is August (64°F).
The coldest month (with the lowest average low temperature) is December (27.7°F).

Average pressure in January
Pasco, WA

Average pressure in January: 30.19"Hg

The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is August (29.91"Hg).

Average wind speed in January
Pasco, WA

Average wind speed in January: 6.2mph

The windiest month (with the highest average wind speed) is April (8.4mph).
The calmest month (with the lowest average wind speed) is December (5.8mph).

Average humidity in January
Pasco, WA

Average humidity in January: 80%

The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is July (35%).

Average rainfall in January
Pasco, WA

Average rainfall in January: 0.94"

The wettest month (with the highest rainfall) is January (0.94").
The driest month (with the least rainfall) is July (0.2").

Average rainfall days in January
Pasco, WA

Average rainfall days in January: 11.4 days

The month with the highest number of rainy days is March (12.8 days).
The month with the least rainy days is August (3.5 days).

Average snowfall in January
Pasco, WA

Average snowfall in January: 0.94"

The month with the highest snowfall is February (2.09").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in January
Pasco, WA

Average snowfall days in January: 2.3 days

The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in January: 9h and 1min

The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).

Average sunshine in January: 5h and 2min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).

Average sunshine days in January
Pasco, WA

Average sunshine days in January: 16.3 days

The month with the most sunshine days is July (25.3 days).
The month with the least sunshine days is February (14.7 days).

Average UV index in January
Pasco, WA

Average UV index in January: 2

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

Average cloud cover in January
Pasco, WA

Average cloud cover in January: 44

The month with the most cloud cover is January (Cloud cover 44).
The months with the least cloud cover are July and August (Cloud cover 10).

Average visibility in January
Pasco, WA

Average visibility in January: 6mi

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

January weather forecast
Pasco, WA

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