December weather forecast
Bay City, OR

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Weather in December

The first month of the winter, December, is also a frosty month in Bay City, Oregon, with an average temperature varying between 40.1°F (4.5°C) and 46.2°F (7.9°C).

Temperature

Bay City's temperature records reveal December as the coldest month, marked by average highs of 46.2°F (7.9°C) and lows of 40.1°F (4.5°C).

Humidity

In December, the average relative humidity in Bay City, Oregon, is 81%.

Rainfall

The month with the most rainfall is December, when the rain falls for 14.9 days and typically aggregates up to 2.13" (54mm) of precipitation.

Snowfall

In Bay City, snow does not fall in March through December.

Ocean temperature

In Bay City, in December, the average water temperature is 50°F (10°C).
Note: If planning to swim in 50°F (10°C) under 50°F (10°C), wear a protective suit. Neglecting this advice might cause immediate cold shock and troubled breathing. A splash around 55.4°F (13°C) is not much warmer.

Daylight

The month with the shortest days in Bay City is December, with an average of 8h and 48min of daylight.
On the first day of December in Bay City, sunrise is at 7:36 am and sunset at 4:33 pm. On the last day of the month, sunrise is at 7:55 am and sunset at 4:42 pm PST.

Sunshine

In Bay City, the average sunshine in December is 4.3h.

UV index

The months with the lowest UV index in Bay City are February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to Sun's UV rays for the average person.
Note: During December, 2 as the daily maximum UV index converts into the following advice:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
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Frequently asked questions

What time of the year is the coldest in Bay City?

December, with average temperatures reaching a high of 46.2°F (7.9°C) and a low of 40.1°F (4.5°C), is the coldest month in Bay City.

What are the temperatures in Bay City in December?

The high-temperature, in December, in Bay City, is 46.2°F (7.9°C), while the low-temperature averages to 40.1°F (4.5°C).

What is the average humidity in December in Bay City?

The average relative humidity in December in Bay City, Oregon, is 81%.

What is the wettest month in Bay City?

December is the month with the most rainfall in Bay City, Oregon. Rain falls for 14.9 days and accumulates 2.13" (54mm) of precipitation.

How much does it rain in Bay City in December?

In Bay City, during December, the rain falls for 14.9 days and regularly aggregates up to 2.13" (54mm) of precipitation.

When it does not snow in Bay City?

March through December are months without snowfall.

Does it snow in Bay City in December?

In Bay City, Oregon, in December, it doesn't snow. In January, it regularly snows.

What is the ocean temperature in December in Bay City?

In December, the average ocean temperature in Bay City, Oregon, is 50°F (10°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.

What is the month with the shortest days in Bay City?

The month with the shortest days in Bay City is December, with an average of 8h and 48min of daylight.

What is the average length of the day in December in Bay City?

The average day length in December in Bay City, Oregon, is 8h and 46min.

When is the sunrise / sunset in December in Bay City?

In December, on the first day of the month, sunrise is at 7:36 am and sunset at 4:33 pm. On the last day of the month, in Bay City, Oregon, sunrise is at 7:55 am and sunset at 4:42 pm PST.

How many hours of sunshine does Bay City have in December?

In December, the average sunshine duration is 4.3h.

When is the lowest UV index in Bay City?

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

What is the UV index intensity in December in Bay City?

In Bay City, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a low health threat from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Bay City, OR

Average temperature in December - Bay City, OR
  • Average high temperature in December: 46.2°F

The warmest month (with the highest average high temperature) is August (66.2°F).
The month with the lowest average high temperature is December (46.2°F).

  • Average low temperature in December: 40.1°F

The month with the highest average low temperature is August (55°F).
The coldest month (with the lowest average low temperature) is December (40.1°F).

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Average pressure in December
Bay City, OR

Average pressure in December - Bay City, OR
  • Average pressure in December: 30.07"Hg

The months with the highest atmospheric pressure are January and April (30.08"Hg).
The month with the lowest atmospheric pressure is September (30.02"Hg).

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Average wind speed in December
Bay City, OR

Average wind speed in December - Bay City, OR
  • Average wind speed in December: 10.2mph

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).

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Average humidity in December
Bay City, OR

Average humidity in December - Bay City, OR
  • Average humidity in December: 81%

The month with the highest relative humidity is August (83%).
The month with the lowest relative humidity is May (80%).

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Average rainfall in December
Bay City, OR

Average rainfall in December - Bay City, OR
  • Average rainfall in December: 2.13"

The wettest month (with the highest rainfall) is December (2.13").
The driest month (with the least rainfall) is August (0.2").

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Average rainfall days in December
Bay City, OR

Average rainfall days in December - Bay City, OR
  • Average rainfall days in December: 14.9 days

The month with the highest number of rainy days is March (16.1 days).
The month with the least rainy days is August (4.4 days).

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Average snowfall in December
Bay City, OR

Average snowfall in December - Bay City, OR
  • Average snowfall in December: 0"

The month with the highest snowfall is February (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").

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Average snowfall days in December
Bay City, OR

Average snowfall days in December - Bay City, OR
  • Average snowfall days in December: 0.1 days

The month with the highest number of snowfall days is February (1.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average sea temperature in December
Bay City, OR

Average sea temperature in December - Bay City, OR
  • Average sea temperature in December: 49.9°F

The best month for swimming (with the highest average sea temperature) is July (57.2°F).
The coldest month (with the lowest average sea temperature) is February (48.1°F).

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Average daylight in December /
Average sunshine in December
Bay City, OR

Average daylight in December / Average sunshine in December - Bay City, OR
  • Average daylight in December: 8h and 5min

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

  • Average sunshine in December: 4h and 2min

The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 0min).

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Average sunshine days in December
Bay City, OR

Average sunshine days in December - Bay City, OR
  • Average sunshine days in December: 13.2 days

The month with the most sunshine days is August (25.3 days).
The month with the least sunshine days is March (12.4 days).

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Average UV index in December
Bay City, OR

Average UV index in December - Bay City, OR
  • Average UV index in December: 2

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

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Average cloud cover in December
Bay City, OR

Average cloud cover in December - Bay City, OR
  • Average cloud cover in December: 55

The months with the most cloud cover are January and March (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in December
Bay City, OR

Average visibility in December - Bay City, OR
  • Average visibility in December: 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).

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Bay City, Oregon, USA

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