Live Weather & Forecast
Weather in Mill Valley
California, United States · Real-time conditions & 3-day outlook
15°C
Feels like 15°C
59°F / Feels 59°F
Partly cloudy
Mill Valley, California
🌞 Daytime
Updated: 2026-04-12 16:45
Humidity
72%
Wind
25.6 km/h WSW
Wind Gust
34.6 km/h
Pressure
1012 mb
Visibility
16 km
UV Index
2.9
(Low)
Precipitation
0 mm
Cloud Cover
75%
Dew Point
9.4°C
Wind Degree
254°
Air Quality Index
US EPA: Good
UK DEFRA: Low (1)
CO
228.9 μg/m³
NO₂
23.6 μg/m³
O₃
48 μg/m³
SO₂
2.9 μg/m³
PM 2.5
10.3 μg/m³
PM 10
12.9 μg/m³
Today's Hourly Forecast
24-hour breakdown for Mill Valley, California
12 AM
10°
Patchy rain nearby
1 AM
10°
Moderate rain
2 AM
10°
Patchy rain nearby
3 AM
10°
Patchy rain nearby
4 AM
10°
Clear
5 AM
10°
Overcast
6 AM
10°
Patchy rain nearby
7 AM
10°
Moderate rain at times
8 AM
11°
Patchy rain nearby
9 AM
12°
Moderate rain at times
10 AM
13°
Partly Cloudy
11 AM
13°
Light rain
12 PM
14°
Patchy rain nearby
1 PM
15°
Partly Cloudy
2 PM
15°
Partly Cloudy
3 PM
15°
Sunny
4 PM
15°
Partly cloudy
5 PM
15°
Sunny
6 PM
15°
Sunny
7 PM
13°
Sunny
8 PM
12°
Clear
9 PM
11°
Clear
10 PM
11°
Clear
11 PM
10°
Partly Cloudy
3-Day Forecast
Daily overview for Mill Valley, California
Today
Moderate rain
16°
/
9°
🌧️ 85% chance of rain
💧 Avg. humidity: 74%
💨 Max wind: 45.7 km/h
🌧️ Total precip: 6.52 mm
☀️ UV Index: 1.1
🌅 Sunrise: 06:39 AM
🌇 Sunset: 07:44 PM
🌙 Waning Crescent
🌑 Moon: 33% lit
Mon, Apr 13
Partly Cloudy
17°
/
8°
🌧️ 0% chance of rain
💧 Avg. humidity: 77%
💨 Max wind: 21.2 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.5
🌅 Sunrise: 06:37 AM
🌇 Sunset: 07:45 PM
🌙 Waning Crescent
🌑 Moon: 23% lit
Tue, Apr 14
Mist
15°
/
8°
🌧️ 0% chance of rain
💧 Avg. humidity: 83%
💨 Max wind: 20.5 km/h
🌧️ Total precip: 0 mm
☀️ UV Index: 1.6
🌅 Sunrise: 06:36 AM
🌇 Sunset: 07:46 PM
🌙 Waning Crescent
🌑 Moon: 15% lit
Best Time to Visit Mill Valley
Plan your trip to Mill Valley, United States around the most favorable weather conditions.
Peak Season
June – September
Warm, dry summers — ideal for outdoor activities.
Shoulder Season
April – May, October
Fewer crowds, moderate prices, mild weather.
Off Season
November – March
Cooler temperatures; some regions may experience rain or snow.
Frequently Asked Questions
What is the current weather in Mill Valley?
Current conditions in Mill Valley: Partly cloudy, temperature 15°C, humidity 72%.
What is the best time to visit Mill Valley?
The best time to visit Mill Valley is typically June – September. Warm, dry summers — ideal for outdoor activities.
What is the climate like in Mill Valley?
Mill Valley is located at approximately 37.9° latitude. It has a temperate climate with warm summers and cold winters.
Does it rain a lot in Mill Valley?
The wettest period in Mill Valley is typically during November – March. Cooler temperatures; some regions may experience rain or snow.
What should I pack for a trip to Mill Valley?
For visits to Mill Valley during June – September: light clothing and sun protection. For November – March: layers and a waterproof jacket are recommended.
What country is Mill Valley in?
Mill Valley is located in United States, in the state of California.
What are the public holidays in Mill Valley in 2026?
View the 2026 public holidays for Mill Valley on our Holidays page.
What are the GPS coordinates used for the weather forecast in Mill Valley?
The weather forecast for Mill Valley uses coordinates 37.906, -122.545.