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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, like December, is a moderate winter month in Mill Valley, California, with an average temperature ranging between max 56.1°F (13.4°C) and min 45.5°F (7.5°C). The commencement of January brings an average high-temperature of a still refreshing 56.1°F (13.4°C), marking an inconsequential divergence from December. Weather in January »
Weather in February
February, the last month of the winter in Mill Valley, is another refreshing month, with temperature in the range of an average high of 57.9°F (14.4°C) and an average low of 45.9°F (7.7°C). February observes an average high-temperature of a still mild 57.9°F (14.4°C), marking an insignificant difference from January's 56.1°F (13.4°C). Weather in February »
Weather in March
The first month of the spring, March, is also a moderate month in Mill Valley, California, with an average temperature ranging between max 59.4°F (15.2°C) and min 46.9°F (8.3°C). March's advent notes a subtle adjustment in average high-temperature to a still mild 59.4°F (15.2°C) from February. Weather in March »
Weather in April
April in Mill Valley, California, is an enjoyable spring month, with an average temperature varying between 48.6°F (9.2°C) and 62.8°F (17.1°C). The advent of April denotes an average high-temperature of an enjoyable 62.8°F (17.1°C), subtly different from March's 59.4°F (15.2°C). Weather in April »
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). 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. Weather in May »
Weather in June
The first month of the summer, June, is an agreeable month in Mill Valley, California, with an average temperature ranging between max 69.1°F (20.6°C) and min 53.2°F (11.8°C). As May turns into June, the average high-temperatures rest at an agreeable 69.1°F (20.6°C), showing a minor variation from the prior month. Weather in June »
Weather in July
July, the same as June, in Mill Valley, California, is an agreeable summer month, with temperature in the range of an average high of 70.5°F (21.4°C) and an average low of 54.3°F (12.4°C). July brings a marginal elevation to a still pleasant 70.5°F (21.4°C) from June's 69.1°F (20.6°C) in Mill Valley's average high-temperatures. Weather in July »
Weather in August
The last month of the summer, August, is also an agreeable month in Mill Valley, California, with an average temperature ranging between max 71.2°F (21.8°C) and min 55.4°F (13°C). The commencement of August introduces an average high-temperature of a still pleasant 71.2°F (21.8°C), closely mirroring the preceding month. Weather in August »
Weather in September
The first month of the autumn, September, is still a pleasant month in Mill Valley, California, with an average temperature varying between 56.1°F (13.4°C) and 72.3°F (22.4°C). September is the warmest month of the year, registering average temperatures as high as 72.3°F (22.4°C) and as low as 56.1°F (13.4°C). Weather in September »
Weather in October
October, the same as September, in Mill Valley, California, is another pleasant autumn month, with an average temperature fluctuating between 54.3°F (12.4°C) and 68.9°F (20.5°C). Mill Valley's shift into October sets the average high-temperature at a still pleasant 68.9°F (20.5°C), a figure that deviates only slightly from September's 72.3°F (22.4°C). Weather in October »
Weather in November
The last month of the autumn, November, is another comfortable month in Mill Valley, California, with an average temperature fluctuating between 49.6°F (9.8°C) and 61.5°F (16.4°C). In Mill Valley, the average high-temperature in November slightly decreases from a pleasant 68.9°F (20.5°C) in October to an enjoyable 61.5°F (16.4°C). Weather in November »
Weather in December
The first month of the winter, December, is still a refreshing month in Mill Valley, California, with an average temperature ranging between min 45.3°F (7.4°C) and max 55.4°F (13°C). December, on average, is the coldest month, registering a high temperature of 55.4°F (13°C) and a low of 45.3°F (7.4°C). Weather in December »
[Resources]Frequently asked questions
How much does it rain in Mill Valley?
In Mill Valley, during the entire year, the rain falls for 48 days and collects up to 3.94" (100mm) of precipitation.
What are the months with the lowest UV index in Mill Valley?
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index.
What is the wettest month in Mill Valley?
February is the month with the most rainfall in Mill Valley, California. Rain falls for 5.3 days and accumulates 0.87" (22mm) of precipitation.
What is the most humid month in Mill Valley?
March is the most humid month, with an average relative humidity of 77%.
When is Daylight Saving Time (DST) in Mill Valley?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Mill Valley, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
When is the highest UV index in Mill Valley?
The months with the highest UV index are April, June through September, with an average maximum UV index of 5.
What is the driest month in Mill Valley?
The months with the least rainfall in Mill Valley, California, are June through September Rain falls for 1.2 days and accumulates 0.04" (1mm) of rain.
When are the longest days in Mill Valley?
June has the longest days of the year, with an average of 14h and 48min of daylight.
What month has the most sunshine in Mill Valley?
With an average of 11.2h of sunshine, July has the most sunshine of the year in Mill Valley, California.
What part of the year is the hottest in Mill Valley?
September, known for its average high temperature of 72.3°F (22.4°C) and an average low temperature of 56.1°F (13.4°C), is the warmest month.
What is the least humid month in Mill Valley?
October is the least humid month, with an average relative humidity of 68%.
What is the coldest month in Mill Valley?
With its average high temperature of 55.4°F (13°C) and a low of 45.3°F (7.4°C), December is regarded as the coldest month.
What is the month with the shortest days in Mill Valley?
December has the shortest days of the year in Mill Valley, California, with an average of 9h and 36min of daylight.
What is the month with the least sunshine in Mill Valley?
The month with the least sunshine in Mill Valley is December, with an average of 5.5h of sunshine.
Average temperature
Mill Valley, CA
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).
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).
Average pressure
Mill Valley, CA
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
30.03"Hg - Average pressure in May:
29.98"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.92"Hg - Average pressure in September:
29.92"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.1"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).
Average wind speed
Mill Valley, CA
- Average wind speed in January:
6mph - Average wind speed in February:
6.8mph - Average wind speed in March:
7.3mph - Average wind speed in April:
7.6mph - Average wind speed in May:
7.8mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.4mph - Average wind speed in September:
5.9mph - Average wind speed in October:
5.5mph - Average wind speed in November:
5.5mph - Average wind speed in December:
6.2mph
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).
Average humidity
Mill Valley, CA
The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is October (68%).
Average rainfall
Mill Valley, CA
- Average rainfall in January:
0.59" - Average rainfall in February:
0.87" - Average rainfall in March:
0.59" - Average rainfall in April:
0.2" - Average rainfall in May:
0.28" - Average rainfall in June:
0.04"
- Average rainfall in July:
0.04" - Average rainfall in August:
0.04" - Average rainfall in September:
0.04" - Average rainfall in October:
0.12" - Average rainfall in November:
0.47" - Average rainfall in December:
0.67"
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").
Average rainfall days
Mill Valley, CA
- Average rainfall days in January:
5.9 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
8.8 days - Average rainfall days in April:
5.5 days - Average rainfall days in May:
3.3 days - Average rainfall days in June:
1.2 days
- Average rainfall days in July:
1.4 days - Average rainfall days in August:
1.2 days - Average rainfall days in September:
1.7 days - Average rainfall days in October:
2.6 days - Average rainfall days in November:
3.9 days - Average rainfall days in December:
7.2 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).
Average daylight / Average sunshine
Mill Valley, CA
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 1min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 3min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 4min
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 January:
5h and 4min - Average sunshine in February:
6h and 1min - Average sunshine in March:
7h and 3min - Average sunshine in April:
10h and 0min - Average sunshine in May:
10h and 0min - Average sunshine in June:
11h and 1min
- Average sunshine in July:
11h and 1min - Average sunshine in August:
10h and 5min - Average sunshine in September:
10h and 2min - Average sunshine in October:
6h and 5min - Average sunshine in November:
6h and 2min - Average sunshine in December:
5h and 3min
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).
Average sunshine days
Mill Valley, CA
- Average sunshine days in January:
24.2 days - Average sunshine days in February:
21.4 days - Average sunshine days in March:
20.7 days - Average sunshine days in April:
23.3 days - Average sunshine days in May:
24.7 days - Average sunshine days in June:
26.4 days
- Average sunshine days in July:
26.3 days - Average sunshine days in August:
24.8 days - Average sunshine days in September:
26 days - Average sunshine days in October:
26.2 days - Average sunshine days in November:
24 days - Average sunshine days in December:
22.1 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).
Average UV index
Mill Valley, CA
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).
Average cloud cover
Mill Valley, CA
The month with the most cloud cover is March (Cloud cover 39).
The month with the least cloud cover is September (Cloud cover 19).
Average visibility
Mill Valley, CA
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).
Mill Valley, California, USA
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