January weather forecastManchester, WA

January

Weather in January

January, the same as December, in Manchester, Washington, is another chilly winter month, with an average temperature ranging between max 45°F (7.2°C) and min 36.1°F (2.3°C).

Temperature

As Manchester welcomes January, the average high-temperature records at a still chilly 45°F (7.2°C), marking an insignificant deviation from the prior month. Manchester reports an average low-temperature of 36.1°F (2.3°C) during the subtly cooler January nights.

Humidity

The average relative humidity in January is 86%.

Rainfall

The wettest months are January and December, with an average 2.05" (52mm) of rainfall.

Snowfall

January through March, November and December are months with snowfall. In January, it is snowing for 1.7 days. Throughout January, 0.63" (16mm) of snow is accumulated. In Manchester, during the entire year, snow falls for 7 days and aggregates up to 2.36" (60mm) of snow.

Ocean temperature

In Manchester, in January, the average water temperature is 45.5°F (7.5°C).
Note: Swimming in 45.5°F (7.5°C) can be lethal. Merely spending a few minutes in 55.4°F (13°C) waters feels harsh, and venturing below 50°F (10°C) might disrupt breathing control and bring about cold shock, contingent on individual resilience.

Daylight

In Manchester, Washington, the average length of the day in January is 8h and 58min.
On the first day of the month, sunrise is at 7:58 am and sunset at 4:29 pm. On the last day of January, sunrise is at 7:37 am and sunset at 5:09 pm PST.

Sunshine

The average sunshine in January is 4.2h.

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 reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In January, the maximum UV index of 2 transforms into these recommendations:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.

Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

Manchester in January has an average high-temperature of 45°F (7.2°C) and an average low-temperature of 36.1°F (2.3°C).

In Manchester, the average relative humidity in January is 86%.

The wettest months are January and December, with an average 2.05" (52mm) of rainfall.

In Manchester, Washington, in January, during 13.4 rainfall days, 2.05" (52mm) of precipitation is typically accumulated.

In Manchester, during January, snow falls for 1.7 days and regularly aggregates up to 0.63" (16mm) of snow.

In January, the average ocean temperature is 45.5°F (7.5°C). At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.

In Manchester, the average day length in January is 8h and 58min.

On the first day of January, sunrise is at 7:58 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 5:09 pm PST.

The average sunshine duration in January is 4.2h.

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

In January, the average daily maximum UV index is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability 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

43.2°F

45°F

46°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

5.2mph

5.7mph

5.6mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

1.7

2.8

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

13.8

14.9

11.8

Average UV index

Average cloud cover

Average visibility

Average temperature in January
Manchester, WA

Average high temperature in January: 45°F

The warmest month (with the highest average high temperature) is August (77.2°F).
The month with the lowest average high temperature is December (43.2°F).

Average low temperature in January: 36.1°F

The month with the highest average low temperature is August (53.6°F).
The coldest month (with the lowest average low temperature) is December (34.9°F).

Average pressure in January
Manchester, WA

Average pressure in January: 30.09"Hg

The month with the highest atmospheric pressure is January (30.09"Hg).
The months with the lowest atmospheric pressure are March, August and September (30.01"Hg).

Average wind speed in January
Manchester, WA

Average wind speed in January: 5.1mph

The windiest month (with the highest average wind speed) is March (5.5mph).
The calmest months (with the lowest average wind speed) are July and August (3.5mph).

Average humidity in January
Manchester, WA

Average humidity in January: 86%

The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is July (69%).

Average rainfall in January
Manchester, WA

Average rainfall in January: 2.05"

The wettest months (with the highest rainfall) are January and December (2.05").
The driest month (with the least rainfall) is July (0.28").

Average rainfall days in January
Manchester, WA

Average rainfall days in January: 13.4 days

The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is August (5.4 days).

Average snowfall in January
Manchester, WA

Average snowfall in January: 0.63"

The month with the highest snowfall is February (1.22").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in January
Manchester, WA

Average snowfall days in January: 1.7 days

The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in January
Manchester, WA

Average sea temperature in January: 45.6°F

The best month for swimming (with the highest average sea temperature) is August (53.2°F).
The coldest month (with the lowest average sea temperature) is February (45.3°F).

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

Average daylight in January: 9h and 0min

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 12min

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
Manchester, WA

Average sunshine days in January: 14.9 days

The month with the most sunshine days is August (22.8 days).
The month with the least sunshine days is February (11.8 days).

Average UV index in January
Manchester, WA

Average UV index in January: 2

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in January
Manchester, WA

Average cloud cover in January: 57

The month with the most cloud cover is December (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 25).

Average visibility in January
Manchester, WA

Average visibility in January: 5mi

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