March weather forecast and climate
Mill Valley, CA

Weather in March

The first month of the spring, March, is still a mild month in Mill Valley, California, with average temperature ranging between min 46.9°F (8.3°C) and max 59.4°F (15.2°C).

Temperature

In Mill Valley, the average high-temperature in March is relatively the same as in February - a still mild 59.4°F (15.2°C). The average low-temperature, in March, is 46.9°F (8.3°C).

Humidity

The most humid month in Mill Valley, California, is March, with an average relative humidity of 77%.

Rainfall

In March, the rain falls for 8.8 days. Throughout March, 0.59" (15mm) of precipitation is accumulated. Throughout the year, there are 48 rainfall days, and 3.94" (100mm) of precipitation is accumulated.

Daylight

In Mill Valley, the average length of the day is 12h.

Sunshine

The average sunshine in Mill Valley, California, is 7.5h.

UV index

In Mill Valley, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to the UV radiation for average individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in March in Mill Valley?

The average high-temperature, in March, is 59.4°F (15.2°C), while the average low-temperature is 46.9°F (8.3°C).

What is the most humid month in Mill Valley?

With an average relative humidity of 77%, March is the most humid month in Mill Valley.

What is the average humidity in March in Mill Valley?

In March, the average relative humidity in Mill Valley, California, is 77%.

How many days does it rain in March in Mill Valley?

In Mill Valley, California, in March, during 8.8 rainfall days, 0.59" (15mm) of precipitation is typically accumulated.

How many hours of daylight does Mill Valley have in March?

In March, the average length of the day is 12h.

How many hours of sunshine does Mill Valley have in March?

In March, the average sunshine in Mill Valley is 7.5h.

How high is the UV index in March in Mill Valley?

The average daily maximum UV index in March is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV radiation.

Average temperature in March
Mill Valley, CA

Average temperature in March - Mill Valley, CA
  • Average high temperature in March: 59.4°F

The warmest month (with the highest average high temperature) is September (72.3°F).
The month with the lowest average high temperature is December (55.4°F).

  • Average low temperature in March: 46.9°F

The month with the highest average low temperature is September (56.1°F).
The coldest month (with the lowest average low temperature) is December (45.3°F).

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Average pressure in March
Mill Valley, CA

Average pressure in March - Mill Valley, CA
  • Average pressure in March: 30.07"

The month with the highest atmospheric pressure is January (30.13").
Months with the lowest atmospheric pressure are June, August and September (29.92").

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Average wind speed in March
Mill Valley, CA

Average wind speed in March - Mill Valley, CA
  • Average wind speed in March: 7.3mph

The windiest month (with the highest average wind speed) is May (7.8mph).
The calmest months (with the lowest average wind speed) are October and November (5.5mph).

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Average humidity in March
Mill Valley, CA

Average humidity in March - Mill Valley, CA
  • Average humidity in March: 77%

The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is October (68%).

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Average rainfall in March
Mill Valley, CA

Average rainfall in March - Mill Valley, CA
  • Average rainfall in March: 0.59"

The wettest month (with the highest rainfall) is February (0.87").
The driest months (with the least rainfall) are June, July, August and September (0.04").

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Average rainfall days in March
Mill Valley, CA

Average rainfall days in March - Mill Valley, CA
  • Average rainfall days in March: 8.8 days

The month with the highest number of rainy days is March (8.8 days).
Months with the least rainy days are June and August (1.2 days).

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Average daylight in March /
Average sunshine in March
Mill Valley, CA

Average daylight in March / Average sunshine in March - Mill Valley, CA
  • Average daylight in March: 12h

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 March: 7.5h

The month with the most sunshine is July (Average sunshine: 11.2h).
The month with the least sunshine is December (Average sunshine: 5.5h).

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Average sunshine days in March
Mill Valley, CA

Average sunshine days in March - Mill Valley, CA
  • Average sunshine days in March: 20.7 days

The month with the most sunshine days is June (26.4 days).
The month with the least sunshine days is March (20.7 days).

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Average UV index in March
Mill Valley, CA

Average UV index in March - Mill Valley, CA
  • Average UV index in March: 4

Months with the highest UV index are April, June, July, August and September (UV index 5).
Months with the lowest UV index are January, February, November and December (UV index 3).

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Average cloud cover in March
Mill Valley, CA

Average cloud cover in March - Mill Valley, CA
  • Average cloud cover in March: 39

The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 19).

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Average visibility in March
Mill Valley, CA

Average visibility in March - Mill Valley, CA
  • Average visibility in March: 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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