January weather forecast and climate
Lafayette, CA

Weather in January

January in Lafayette, California, is a mild winter month, with average temperature fluctuating between 56.5°F (13.6°C) and 43.3°F (6.3°C).

Temperature

In Lafayette, the average high-temperature is essentially the same as in December - a mild 56.5°F (13.6°C). The average low-temperature, in Lafayette, is 43.3°F (6.3°C).

Humidity

In January, the average relative humidity is 73%.

Rainfall

In Lafayette, during January, the rain falls for 10.1 days and regularly aggregates up to 2.13" (54mm) of precipitation. In Lafayette, California, during the entire year, the rain falls for 74.4 days and collects up to 12.6" (320mm) of precipitation.

Daylight

The average length of the day in Lafayette is 9.9h.

Sunshine

In Lafayette, the average sunshine in January is 6.1h.

UV index

January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: In January, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in January in Lafayette?

In January, the average high-temperature is 56.5°F (13.6°C), and the average low-temperature is 43.3°F (6.3°C).

What is the average humidity in January in Lafayette?

In January, the average relative humidity is 73%.

How much does it rain in Lafayette in January?

In Lafayette, in January, during 10.1 rainfall days, 2.13" (54mm) of precipitation is typically accumulated.

How many hours of daylight does Lafayette have in January?

The average length of the day in January in Lafayette, California, is 9.9h.

How long on average sun shines in January in Lafayette?

In January, the average sunshine in Lafayette, California, is 6.1h.

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

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 3.

How high is the UV index in January in Lafayette?

In Lafayette, the average daily maximum UV index in January is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in January
Lafayette, CA

Average temperature in January - Lafayette, CA
  • Average high temperature in January: 56.5°F

The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is December (55.2°F).

  • Average low temperature in January: 43.3°F

Months with the highest average low temperature are August and September (56.8°F).
The coldest month (with the lowest average low temperature) is January (43.3°F).

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Average pressure in January
Lafayette, CA

Average pressure in January - Lafayette, CA
  • Average pressure in January: 30.14"

The month with the highest atmospheric pressure is January (30.14").
Months with the lowest atmospheric pressure are June, August and September (29.92").

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Average wind speed in January
Lafayette, CA

Average wind speed in January - Lafayette, CA
  • Average wind speed in January: 4.8mph

The windiest month (with the highest average wind speed) is May (7.2mph).
The calmest month (with the lowest average wind speed) is November (4.6mph).

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Average humidity in January
Lafayette, CA

Average humidity in January - Lafayette, CA
  • Average humidity in January: 73%

The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is October (60%).

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Average rainfall in January
Lafayette, CA

Average rainfall in January - Lafayette, CA
  • Average rainfall in January: 2.13"

The wettest month (with the highest rainfall) is February (2.6").
The driest months (with the least rainfall) are July and August (0.04").

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Average rainfall days in January
Lafayette, CA

Average rainfall days in January - Lafayette, CA
  • Average rainfall days in January: 10.1 days

The month with the highest number of rainy days is March (13.1 days).
The month with the least rainy days is August (0.8 days).

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Average daylight in January /
Average sunshine in January
Lafayette, CA

Average daylight in January / Average sunshine in January - Lafayette, CA
  • Average daylight in January: 9.9h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.6h).

  • Average sunshine in January: 6.1h

The month with the most sunshine is July (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 5.8h).

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Average sunshine days in January
Lafayette, CA

Average sunshine days in January - Lafayette, CA
  • Average sunshine days in January: 19.7 days

The month with the most sunshine days is August (27.8 days).
The month with the least sunshine days is March (16.3 days).

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Average UV index in January
Lafayette, CA

Average UV index in January - Lafayette, CA
  • Average UV index in January: 3

The month with the highest UV index is June (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in January
Lafayette, CA

Average cloud cover in January - Lafayette, CA
  • Average cloud cover in January: 33

The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 8).

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Average visibility in January
Lafayette, CA

Average visibility in January - Lafayette, CA
  • Average visibility in January: 6mi

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

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