May weather forecast
Mill Valley, CA

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Weather in May

May, the last month of the spring in Mill Valley, is another comfortable month, with an average temperature varying between 50.4°F (10.2°C) and 64.9°F (18.3°C).

Temperature

The beginning of May records an average high-temperature of a still refreshing 64.9°F (18.3°C), almost echoing the conditions of the previous month. Mill Valley's average low-temperature for the month of May records at a fresh 50.4°F (10.2°C).

Humidity

In Mill Valley, the average relative humidity in May is 75%.

Rainfall

In Mill Valley, in May, during 3.3 rainfall days, 0.28" (7mm) of precipitation is typically accumulated. Throughout the year, in Mill Valley, California, there are 48 rainfall days, and 3.94" (100mm) of precipitation is accumulated.

Daylight

The average length of the day in May is 14h and 14min.
On the first day of May in Mill Valley, sunrise is at 6:13 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:26 pm PDT.

Sunshine

In Mill Valley, the average sunshine in May is 10h.

UV index

The average daily maximum UV index in May in Mill Valley, California, is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum high daily UV index of 4 during May translates into the following directions:
Adopt protective measures - Suggestions to resist sunburn are offered. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
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Frequently asked questions

What is the average May temperature in Mill Valley?

The high-temperature, in May, in Mill Valley, records 64.9°F (18.3°C), while the low-temperature is 50.4°F (10.2°C).

What is the average humidity in May in Mill Valley?

In Mill Valley, California, the average relative humidity in May is 75%.

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

In Mill Valley, California, in May, during 3.3 rainfall days, 0.28" (7mm) of precipitation is typically accumulated.

What is the average length of the day in May in Mill Valley?

In Mill Valley, California, the average day length in May is 14h and 14min.

When is the sunrise / sunset in May in Mill Valley?

On the first day of May in Mill Valley, California, sunrise is at 6:13 am and sunset at 8:01 pm. On the last day of the month, sunrise is at 5:49 am and sunset at 8:26 pm PDT.

How long on average sun shines in May in Mill Valley?

In May, the average sunshine duration in Mill Valley, California, is 10h.

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

In May, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in May
Mill Valley, CA

Average temperature in May - Mill Valley, CA
  • Average high temperature in May: 64.9°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 May: 50.4°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 May
Mill Valley, CA

Average pressure in May - Mill Valley, CA
  • Average pressure in May: 29.98"Hg

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

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Average wind speed in May
Mill Valley, CA

Average wind speed in May - Mill Valley, CA
  • Average wind speed in May: 7.8mph

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 May
Mill Valley, CA

Average humidity in May - Mill Valley, CA
  • Average humidity in May: 75%

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 May
Mill Valley, CA

Average rainfall in May - Mill Valley, CA
  • Average rainfall in May: 0.28"

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 May
Mill Valley, CA

Average rainfall days in May - Mill Valley, CA
  • Average rainfall days in May: 3.3 days

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

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

Average daylight in May / Average sunshine in May - Mill Valley, CA
  • Average daylight in May: 14h and 1min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in May: 10h and 0min

The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 5h and 30min).

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Average sunshine days in May
Mill Valley, CA

Average sunshine days in May - Mill Valley, CA
  • Average sunshine days in May: 24.7 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 May
Mill Valley, CA

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

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

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Average cloud cover in May
Mill Valley, CA

Average cloud cover in May - Mill Valley, CA
  • Average cloud cover in May: 31

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 May
Mill Valley, CA

Average visibility in May - Mill Valley, CA
  • Average visibility in May: 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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Mill Valley, California, USA

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