January weather forecast
Saint John, WA

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Weather in January

January, like December, in Saint John, Washington, is a wintry winter month, with an average temperature varying between 34.5°F (1.4°C) and 24.6°F (-4.1°C).

Temperature

The transition into January notes an average high-temperature of a still wintry 34.5°F (1.4°C), revealing a mild distinction from the 33.1°F (0.6°C) in December. In January, the nighttime temperature in Saint John lowers to an average of 24.6°F (-4.1°C).

Humidity

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

Rainfall

The months with the most rainfall in Saint John are January and May, with an average 0.91" (23mm) of precipitation.

Snowfall

January through May, September, November and December are months with snowfall in Saint John. In Saint John, in January, snow falls for 7.4 days, with typically accumulated 3.7" (94mm) of snow. In Saint John, during the entire year, snow falls for 32.5 days and aggregates up to 14.09" (358mm) of snow.

Daylight

In Saint John, the average length of the day in January is 9h and 1min.
On the first day of the month, sunrise is at 7:36 am and sunset at 4:11 pm. On the last day of January, sunrise is at 7:16 am and sunset at 4:50 pm PST.

Sunshine

In January, the average sunshine in Saint John is 4.5h.

UV index

The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: In January, a daily UV index of 2 turns into the following recommendations:
Apart from children, who require continuous protection, most can endure sun exposure for up to an hour without experiencing burns. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
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Frequently asked questions

How cold is it in Saint John in January?

In January, in Saint John, the average high-temperature is 34.5°F (1.4°C), and the average low-temperature is 24.6°F (-4.1°C).

What is the most humid month in Saint John?

The most humid month in Saint John is January, with an average relative humidity of 87%.

What is the average humidity in January in Saint John?

In Saint John, the average relative humidity in January is 87%.

What is the rainiest month in Saint John?

The wettest months in Saint John, Washington, are January and May, with an average 0.91" (23mm) of rainfall.

How many days does it rain in January in Saint John?

In January, in Saint John, the rain falls for 7.6 days. Throughout January, 0.91" (23mm) of precipitation is accumulated.

How many days does it snow in January in Saint John?

In January, in Saint John, Washington, it is snowing for 7.4 days. Throughout January, 3.7" (94mm) of snow is accumulated.

What is the average length of the day in January in Saint John?

The average day length in January is 9h and 1min.

When are sunrise and sunset in January in Saint John?

On the first day of January, sunrise is at 7:36 am and sunset at 4:11 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 4:50 pm PST.

How many hours of sunshine does Saint John have in January?

In Saint John, Washington, the average sunshine duration in January is 4.5h.

What is the month with the lowest UV index in Saint John?

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

What is the UV index reading in January in Saint John?

The average daily maximum UV index in January in Saint John, Washington, is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from 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
Saint John, WA

Average temperature in January - Saint John, WA
  • Average high temperature in January: 34.5°F

The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is December (33.1°F).

  • Average low temperature in January: 24.6°F

The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is December (23.9°F).

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Average pressure in January
Saint John, WA

Average pressure in January - Saint John, 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 (29.9"Hg).

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Average wind speed in January
Saint John, WA

Average wind speed in January - Saint John, WA
  • Average wind speed in January: 7.4mph

The windiest month (with the highest average wind speed) is March (8.8mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

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Average humidity in January
Saint John, WA

Average humidity in January - Saint John, WA
  • Average humidity in January: 87%

The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is August (36%).

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Average rainfall in January
Saint John, WA

Average rainfall in January - Saint John, WA
  • Average rainfall in January: 0.91"

The wettest months (with the highest rainfall) are January and May (0.91").
The driest month (with the least rainfall) is July (0.16").

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Average rainfall days in January
Saint John, WA

Average rainfall days in January - Saint John, WA
  • Average rainfall days in January: 7.6 days

The month with the highest number of rainy days is March (10.1 days).
The month with the least rainy days is July (3.5 days).

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Average snowfall in January
Saint John, WA

Average snowfall in January - Saint John, WA
  • Average snowfall in January: 3.7"

The month with the highest snowfall is February (3.82").
The months with the least snowfall are June, July, August and October (0").

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Average snowfall days in January
Saint John, WA

Average snowfall days in January - Saint John, WA
  • Average snowfall days in January: 7.4 days

The month with the highest number of snowfall days is December (9.3 days).
The months with the least snowfall days are June, July, August and October (0 days).

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Average daylight in January /
Average sunshine in January
Saint John, WA

Average daylight in January / Average sunshine in January - Saint John, WA
  • Average daylight in January: 9h and 0min

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).

  • Average sunshine in January: 4h and 3min

The month with the most sunshine is August (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).

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Average sunshine days in January
Saint John, WA

Average sunshine days in January - Saint John, WA
  • Average sunshine days in January: 17.5 days

The month with the most sunshine days is July (26.6 days).
The month with the least sunshine days is February (15.9 days).

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Average UV index in January
Saint John, WA

Average UV index in January - Saint John, 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).

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Average cloud cover in January
Saint John, WA

Average cloud cover in January - Saint John, WA
  • Average cloud cover in January: 55

The months with the most cloud cover are January and December (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 11).

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Average visibility in January
Saint John, WA

Average visibility in January - Saint John, WA
  • Average visibility in January: 5mi

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

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Saint John, Washington, USA

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