Contents
- Weather in April
- Frequently asked questions
- Average temperature in April
- Average pressure in April
- Average wind speed in April
- Average humidity in April
- Average rainfall in April
- Average rainfall days in April
- Average daylight in April
- Average sunshine in April
- Average sunshine days in April
- Average UV index in April
- Average cloud cover in April
- Average visibility in April
Weather in April
Temperature
Mill Valley registers an average high-temperature of a comfortable 62.8°F (17.1°C) with the arrival of April, showing minor deviation from the preceding month. Throughout the month of April, Mill Valley reports a steady low-temperature average of 48.6°F (9.2°C).Humidity
In Mill Valley, the average relative humidity in April is 74%.Rainfall
In Mill Valley, in April, it is raining for 5.5 days, with typically 0.2" (5mm) of accumulated precipitation. In Mill Valley, during the entire year, the rain falls for 48 days and collects up to 3.94" (100mm) of precipitation.Daylight
The average length of the day in April is 13h and 13min.On the first day of the month, sunrise is at 6:53 am and sunset at 7:33 pm. On the last day of April, in Mill Valley, sunrise is at 6:14 am and sunset at 8:00 pm PDT.
Sunshine
In April, the average sunshine is 10h.UV index
April, June through September, with an average maximum UV index of 5, are months with the highest UV index. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: In April, the average maximum UV index of 5 translates into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Mill Valley in April?
What is the average humidity in April?
How much does it rain in April?
How many hours of daylight does Mill Valley have in April?
What time are sunrise and sunset in April?
How long on average sun shines in April?
When is the highest UV index?
What is the UV index intensity in April?
Average temperature in April
Mill Valley, CA
- Average high temperature in April: 62.8°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 April: 48.6°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 in April
Mill Valley, CA
- Average pressure in April: 30.03"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 in April
Mill Valley, CA
- Average wind speed in April: 7.6mph
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 in April
Mill Valley, CA
- Average humidity in April: 74%
The month with the highest relative humidity is March (77%).
The month with the lowest relative humidity is October (68%).
Average rainfall in April
Mill Valley, CA
- Average rainfall in April: 0.2"
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 in April
Mill Valley, CA
- Average rainfall days in April: 5.5 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 in April /
Average sunshine in April
Mill Valley, CA
- Average daylight in April: 13h 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 April: 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).
Average sunshine days in April
Mill Valley, CA
- Average sunshine days in April: 23.3 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 in April
Mill Valley, CA
- Average UV index in April: 5
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 in April
Mill Valley, CA
- Average cloud cover in April: 30
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 in April
Mill Valley, CA
- Average visibility in April: 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).
Mill Valley, California, USA
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