January weather forecast
Plain, WA

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Weather in January

January, like December, is another subzero cold winter month in Plain, Washington, with an average temperature ranging between max 31.5°F (-0.3°C) and min 18.9°F (-7.3°C).

Temperature

January's onset brings an average high-temperature of a still subzero cold 31.5°F (-0.3°C), showing a minute difference from December's 30.6°F (-0.8°C). Plain records a consistent low-temperature of 18.9°F (-7.3°C) during January nights.

Humidity

With an average relative humidity of 92%, January is the most humid month in Plain, Washington.

Rainfall

January is the month with the most rainfall in Plain. Rain falls for 14.7 days and accumulates 4.33" (110mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. January is the month with the most snowfall in Plain, Washington. Snow falls for 14.7 days and accumulates 16.73" (425mm) of snow.

Daylight

The average length of the day in January in Plain, Washington, is 8h and 56min.
On the first day of the month, sunrise is at 7:51 am and sunset at 4:20 pm. On the last day of January, in Plain, sunrise is at 7:30 am and sunset at 5:01 pm PST.

Sunshine

January has the least sunshine of the year in Plain, Washington, with an average of 4.1h of sunshine.

UV index

The months with the lowest UV index in Plain, Washington, are January and February, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to UV radiation for average individuals.
Note: The maximum UV index, 1 during January, leads to the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
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Frequently asked questions

How cold is January in Plain?

The high-temperature, in January, in Plain, records 31.5°F (-0.3°C), while the low-temperature is 18.9°F (-7.3°C).

What is the most humid month in Plain?

With an average relative humidity of 92%, January is the most humid month in Plain, Washington.

What is the average humidity in January in Plain?

The average relative humidity in January in Plain, Washington, is 92%.

What is the rainiest month in Plain?

January is the month with the most rainfall in Plain. Rain falls for 14.7 days and accumulates 4.33" (110mm) of precipitation.

How much does it rain in Plain in January?

In Plain, in January, it is raining for 14.7 days, with typically 4.33" (110mm) of accumulated precipitation.

What is the snowiest month in Plain?

January is the month with the most snowfall in Plain, Washington. Snow falls for 14.7 days and accumulates 16.73" (425mm) of snow.

How much does it snow in Plain in January?

In Plain, during January, snow falls for 14.7 days and regularly aggregates up to 16.73" (425mm) of snow.

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

In Plain, the average day length in January is 8h and 56min.

When is the sunrise / sunset in January in Plain?

On the first day of January, sunrise is at 7:51 am and sunset at 4:20 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 5:01 pm PST.

What is the month with the least sunshine in Plain?

The month with the least sunshine in Plain, Washington, is January, with an average of 4.1h of sunshine.

How long on average sun shines in January in Plain?

In Plain, Washington, the average sunshine duration in January is 4.1h.

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

The months with the lowest UV index in Plain, Washington, are January and February, with an average maximum UV index of 1.

What is the UV index reading in January in Plain?

In January, the average daily maximum UV index is 1. A UV Index reading of 2, and below, represents a low health threat from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
30.6°F -0.8°C
31.5°F -0.3°C
33.3°F 0.7°C
Average low temperature
18.7°F -7.4°C
18.9°F -7.3°C
19.9°F -6.7°C
Average pressure
30.12" 765mmHg
30.14" 766mmHg
30.08" 764mmHg
Average wind speed
3.5mph 5.6km/h
3.7mph 6km/h
3.9mph 6.3km/h
Average max. wind speed
3.9mph 6.3km/h
4.1mph 6.6km/h
4.3mph 6.9km/h
Average wind speed gusts
6.3mph 10.1km/h
6.8mph 10.9km/h
6.7mph 10.8km/h
Average humidity
90%
92%
91%
Average rainfall
3.86" 98mm
4.33" 110mm
2.91" 74mm
Average rainfall days
13
14.7
14
Average snowfall
15.28" 388mm
16.73" 425mm
11.18" 284mm
Average snowfall days
17
14.7
14.7
Average daylight
8h 3min
8h 5min
10h 2min
Average sunshine
4h 2min
4h 1min
4h 2min
Average sunshine days
8.9
9.3
6.8
Average UV index
2
1
1
Average cloud cover
55%
56%
54%
Average visibility
4mi 6.4km
4mi 6.4km
4mi 6.4km

Average temperature in January
Plain, WA

Average temperature in January - Plain, WA
  • Average high temperature in January: 31.5°F

The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is December (30.6°F).

  • Average low temperature in January: 18.9°F

The month with the highest average low temperature is August (49.6°F).
The coldest month (with the lowest average low temperature) is December (18.7°F).

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Average pressure in January
Plain, WA

Average pressure in January - Plain, WA
  • Average pressure in January: 30.14"Hg

The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is August (29.95"Hg).

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Average wind speed in January
Plain, WA

Average wind speed in January - Plain, WA
  • Average wind speed in January: 3.7mph

The windiest month (with the highest average wind speed) is June (5.7mph).
The calmest month (with the lowest average wind speed) is December (3.5mph).

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Average humidity in January
Plain, WA

Average humidity in January - Plain, WA
  • Average humidity in January: 92%

The month with the highest relative humidity is January (92%).
The months with the lowest relative humidity are July and August (56%).

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Average rainfall in January
Plain, WA

Average rainfall in January - Plain, WA
  • Average rainfall in January: 4.33"

The wettest month (with the highest rainfall) is January (4.33").
The driest month (with the least rainfall) is July (0.43").

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Average rainfall days in January
Plain, WA

Average rainfall days in January - Plain, WA
  • Average rainfall days in January: 14.7 days

The month with the highest number of rainy days is March (18.2 days).
The month with the least rainy days is August (6.3 days).

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Average snowfall in January
Plain, WA

Average snowfall in January - Plain, WA
  • Average snowfall in January: 16.73"

The month with the highest snowfall is January (16.73").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in January
Plain, WA

Average snowfall days in January - Plain, WA
  • Average snowfall days in January: 14.7 days

The month with the highest number of snowfall days is December (17 days).
The months with the least snowfall days are June, July and August (0 days).

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

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

The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).

  • Average sunshine in January: 4h and 1min

The month with the most sunshine is August (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

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Average sunshine days in January
Plain, WA

Average sunshine days in January - Plain, WA
  • Average sunshine days in January: 9.3 days

The month with the most sunshine days is August (21.9 days).
The month with the least sunshine days is February (6.8 days).

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Average UV index in January
Plain, WA

Average UV index in January - Plain, WA
  • Average UV index in January: 1

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

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Average cloud cover in January
Plain, WA

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

The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 15).

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Average visibility in January
Plain, WA

Average visibility in January - Plain, WA
  • Average visibility in January: 4mi

The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, November and December (4mi).

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Plain, Washington, USA

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