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Vacaville, United States Snapshot 2026
Where is Vacaville?
Vacaville, United States
- Continent
- Americas
- Country
- United States
- City
- Vacaville
- Population
- 96.8K
- Elevation
- 53 m
- Coordinates
- 38.36°, -121.99°
Vacaville is a city in United States with a population of approximately 96.8K. Average temperatures range from 6°C (43°F) in January to 34°C (93°F) in July. The best time to visit is May, June, August, September, October.
Time in Vacaville right now
Open full time & time zone page 11:06 06
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 Vacaville
Daylight in Vacaville today
View full sunrise & sunset page Sunrise
Sunset
Day length
14h 49m
Climate normals for Vacaville
Long-term monthly averages based on historical data.
January
Fair 
February
Fair March
Good April
Good May best
Excellent June best
Excellent July
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 | 15°C / 6°C | 13°C / 4°C | 10days (125 mm) Wet | 6.3h Fair | 78% Humid | 2.9 Moderate | Fair | View Details |
| February | 17°C / 7°C | 15°C / 4°C | 7days (96 mm) Good | 8.2h Good | 68% Muggy | 3.7 Moderate | Fair | View Details |
| March | 18°C / 7°C | 17°C / 5°C | 10days (95 mm) Wet | 9.2h Good | 70% Muggy | 5.1 High | Good | View Details |
| April | 23°C / 10°C | 22°C / 8°C | 4days (26 mm) Good | 10.9h Excellent | 62% Muggy | 6.7 High | Good | View Details |
| May best | 28°C / 13°C | 26°C / 11°C | 3days (15 mm) Excellent | 12.6h Excellent | 54% Moderate | 7.8 Very High | Excellent | View Details |
| June best | 33°C / 15°C | 32°C / 14°C | 0days (1 mm) Excellent | 13.5h Excellent | 48% Moderate | 8.2 Very High | Excellent | View Details |
| July | 34°C / 16°C | 34°C / 15°C | 0days (0 mm) Excellent | 13.4h Excellent | 51% Moderate | 8.3 Very High | Excellent | View Details |
| August best | 34°C / 16°C | 34°C / 16°C | 0days (0 mm) Excellent | 12.4h Excellent | 53% Moderate | 7.7 Very High | Excellent | View Details |
| September best | 32°C / 16°C | 31°C / 15°C | 0days (4 mm) Excellent | 11.2h Excellent | 53% Moderate | 6.4 High | Excellent | View Details |
| October best | 27°C / 13°C | 25°C / 12°C | 3days (26 mm) Excellent | 9.5h Good | 52% Moderate | 4.9 Moderate | Excellent | View Details |
| November | 19°C / 9°C | 18°C / 7°C | 5days (52 mm) Good | 7.7h Good | 65% Muggy | 3.3 Moderate | Good | View Details |
| December | 15°C / 6°C | 13°C / 4°C | 9days (97 mm) Wet | 6.1h Fair | 76% Humid | 2.5 Moderate | Fair | View Details |
Monthly Temperatures
HighLow
Line chart showing monthly temperatures. Jan: 15°C / 6°C . Feb: 17°C / 7°C . Mar: 18°C / 7°C . Apr: 23°C / 10°C . May: 28°C / 13°C . Jun: 33°C / 15°C . Jul: 34°C / 16°C . Aug: 34°C / 16°C . Sep: 32°C / 16°C . Oct: 27°C / 13°C . Nov: 19°C / 9°C . Dec: 15°C / 6°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 125 mm. Feb: 96 mm. Mar: 95 mm. Apr: 26 mm. May: 15 mm. Jun: 1 mm. Jul: 0 mm. Aug: 0 mm. Sep: 4 mm. Oct: 26 mm. Nov: 52 mm. Dec: 97 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 78%. Feb: 68%. Mar: 70%. Apr: 62%. May: 54%. Jun: 48%. Jul: 51%. Aug: 53%. Sep: 53%. Oct: 52%. Nov: 65%. Dec: 76%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 13 km/h . Feb: 15 km/h . Mar: 16 km/h . Apr: 16 km/h . May: 18 km/h . Jun: 18 km/h . Jul: 18 km/h . Aug: 17 km/h . Sep: 15 km/h . Oct: 13 km/h . Nov: 11 km/h . Dec: 12 km/h .
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 8. Sep: UV 6. Oct: UV 5. Nov: UV 3. Dec: UV 3.
Frequently Asked Questions
Vacaville has a population of approximately 96.8K.
The best months to visit Vacaville are May, June, August, September, October, when temperatures are pleasant and rainfall is lower.
Vacaville receives approximately 537mm of rainfall annually across 51 rainy days.
Vacaville is located in United States, in the Americas region.
Vacaville sits at an elevation of 53 m (174 ft) above sea level.