UTC Offset
UTC-07:00
Mill Valley, United States Snapshot 2026
Where is Mill Valley?
Mill Valley, United States
- Continent
- Americas
- Country
- United States
- City
- Mill Valley
- Population
- 14.4K
- Elevation
- 24 m
- Coordinates
- 37.91°, -122.54°
Mill Valley is a city in United States with a population of approximately 14.4K. Average temperatures range from 7°C (45°F) in January to 23°C (74°F) in September. The best time to visit is June, July, August, September, October.
Time in Mill Valley right now
Open full time & time zone page 10:49 49
Monday, June 15, 2026
IANA time zone
America/Los_Angeles
Daylight saving
DST in effect
PST / PDT
Next DST change
November 1
backward -1h
Live weather in Mill Valley
Daylight in Mill Valley today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 47m
Climate normals for Mill Valley
Long-term monthly averages based on historical data.
January
Fair 
February
Fair March
Fair April
Good May
Good June best
Excellent July best
Excellent August best
Excellent September best
Excellent October best
Excellent November
Good December
Fair | Month | Temp | Feels Like | Rain | Sun | Humidity | UV | Status | Details |
|---|---|---|---|---|---|---|---|---|
| January | 14°C / 7°C | 12°C / 5°C | 11days (123 mm) Wet | 6.5h Fair | 83% Humid | 2.8 Moderate | Fair | View Details |
| February | 15°C / 7°C | 13°C / 5°C | 7days (105 mm) Good | 8.2h Good | 77% Humid | 3.7 Moderate | Fair | View Details |
| March | 16°C / 8°C | 14°C / 6°C | 11days (100 mm) Wet | 9.2h Good | 78% Humid | 5.2 High | Fair | View Details |
| April | 18°C / 9°C | 17°C / 7°C | 4days (28 mm) Good | 11h Excellent | 75% Muggy | 6.8 High | Good | View Details |
| May | 19°C / 11°C | 19°C / 9°C | 2days (15 mm) Excellent | 12.4h Excellent | 73% Muggy | 7.8 Very High | Good | View Details |
| June best | 22°C / 12°C | 22°C / 11°C | 0days (1 mm) Excellent | 13.2h Excellent | 71% Muggy | 7.9 Very High | Excellent | View Details |
| July best | 22°C / 13°C | 22°C / 12°C | 0days (0 mm) Excellent | 13h Excellent | 76% Humid | 8 Very High | Excellent | View Details |
| August best | 23°C / 14°C | 23°C / 13°C | 0days (0 mm) Excellent | 12.1h Excellent | 77% Humid | 7.4 Very High | Excellent | View Details |
| September best | 23°C / 14°C | 23°C / 13°C | 0days (3 mm) Excellent | 11.1h Excellent | 75% Muggy | 6.3 High | Excellent | View Details |
| October best | 22°C / 12°C | 21°C / 11°C | 3days (30 mm) Excellent | 9.3h Good | 71% Muggy | 4.8 Moderate | Excellent | View Details |
| November | 17°C / 9°C | 16°C / 8°C | 6days (59 mm) Good | 7.8h Good | 77% Humid | 3.3 Moderate | Good | View Details |
| December | 14°C / 7°C | 12°C / 5°C | 9days (108 mm) Wet | 6.3h Fair | 82% Humid | 2.5 Moderate | Fair | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 14°C / 7°C . Feb: 15°C / 7°C . Mar: 16°C / 8°C . Apr: 18°C / 9°C . May: 19°C / 11°C . Jun: 22°C / 12°C . Jul: 22°C / 13°C . Aug: 23°C / 14°C . Sep: 23°C / 14°C . Oct: 22°C / 12°C . Nov: 17°C / 9°C . Dec: 14°C / 7°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 123 mm. Feb: 105 mm. Mar: 100 mm. Apr: 28 mm. May: 15 mm. Jun: 1 mm. Jul: 0 mm. Aug: 0 mm. Sep: 3 mm. Oct: 30 mm. Nov: 59 mm. Dec: 108 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 83%. Feb: 77%. Mar: 78%. Apr: 75%. May: 73%. Jun: 71%. Jul: 76%. Aug: 77%. Sep: 75%. Oct: 71%. Nov: 77%. Dec: 82%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 17 km/h . Feb: 19 km/h . Mar: 20 km/h . Apr: 21 km/h . May: 22 km/h . Jun: 21 km/h . Jul: 19 km/h . Aug: 19 km/h . Sep: 18 km/h . Oct: 16 km/h . Nov: 15 km/h . Dec: 16 km/h .
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 12°C . Feb: 12°C . Mar: 12°C . Apr: 13°C . May: 14°C . Jun: 15°C . Jul: 15°C . Aug: 16°C . Sep: 17°C . Oct: 17°C . Nov: 14°C . Dec: 12°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 3. Feb: UV 4. Mar: UV 5. Apr: UV 7. May: UV 8. Jun: UV 8. Jul: UV 8. Aug: UV 7. Sep: UV 6. Oct: UV 5. Nov: UV 3. Dec: UV 3.
Frequently Asked Questions
Mill Valley has a population of approximately 14.4K.
The best months to visit Mill Valley are June, July, August, September, October, when temperatures are pleasant and rainfall is lower.
Mill Valley receives approximately 572mm of rainfall annually across 53 rainy days.
Mill Valley is located in United States, in the Americas region.
Mill Valley sits at an elevation of 24 m (79 ft) above sea level.