Vacaville (CA)
May
Weather in Vacaville, California for May 2026
Your guide to Vacaville weather in May - trends and predictions
In general, the average temperature in Vacaville at the beginning of May is 25.1 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 29.7 °F by the end of May.
With an average of 2 rainy days, Vacaville experiences minimal rainfall in May.
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Temperatures
Rain 🌧️
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29
Dry days
2
Rainy days
0
Snow days
27°/11°
Temperatures
20 km/h
Avg max wind
66 %
Avg humidity
Vacaville Weather May
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Temperatures trend during May in Vacaville
See the weather trend as well as the moving average line
May weather in Vacaville day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| May 1 |  Overcast | 25° /9° | 0 mm | 6 | |
| May 2 | Overcast | 22° /8° | 0 mm | 5 | |
| May 3 |  Patchy rain possible | 21° /9° | 0.3 mm | 5 | |
| May 4 |  Sunny | 27° /9° | 0 mm | 7 | |
| May 5 | Sunny | 28° /16° | 0 mm | 7 | |
| May 6 | Sunny | 30° /13° | 0 mm | 8 | |
| May 7 | Overcast | 23° /9° | 0 mm | 5 | |
| May 8 | Overcast | 29° /8° | 0 mm | 6 | |
| May 9 |  Partly cloudy | 32° /12° | 0 mm | 8 | |
| May 10 | Sunny | 32° /12° | 0 mm | 8 | |
| May 11 | Partly cloudy | 22° /10° | 0 mm | 6 | |
| May 12 |  Moderate or heavy rain shower | 17° /9° | 5.3 mm | 4 | |
| May 13 | Patchy rain possible | 21° /8° | 0.2 mm | 5 | |
| May 14 |  Cloudy | 24° /8° | 0 mm | 5 | |
| May 15 | Partly cloudy | 27° /10° | 0 mm | 7 | |
| May 16 | Sunny | 28° /12° | 0 mm | 7 | |
| May 17 | Cloudy | 26° /11° | 0 mm | 6 | |
| May 18 | Sunny | 28° /12° | 0 mm | 7 | |
| May 19 | Sunny | 31° /13° | 0 mm | 8 | |
| May 20 | Sunny | 30° /12° | 0 mm | 8 | |
| May 21 | Sunny | 31° /12° | 0 mm | 8 | |
| May 22 | Sunny | 26° /11° | 0 mm | 7 | |
| May 23 | Overcast | 24° /7° | 0 mm | 5 | |
| May 24 | Overcast | 26° /9° | 0 mm | 6 | |
| May 25 |  Mist | 22° /9° | 0 mm | 5 | |
| May 26 | Cloudy | 26° /10° | 0 mm | 6 | |
| May 27 | Partly cloudy | 30° /10° | 0 mm | 8 | |
| May 28 | Mist | 27° /9° | 0 mm | 6 | |
| May 29 | Partly cloudy | 33° /10° | 0 mm | 8 | |
| May 30 | Partly cloudy | 37° /14° | 0 mm | 9 | |
| May 31 | Sunny | 33° /14° | 0 mm | 8 | |
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Important Notice
Our weather forecast for Vacaville in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Vacaville forecast closer to your planned date for the most up-to-date weather information.
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Vacaville in May - FAQ
What are the expected maximum and minimum temperatures in Vacaville during May?
Enjoy moderate daytime temperatures of up to 27° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Vacaville during May?
Rainfall in Vacaville during May is rare to nonexistent, with the total expected rainfall being less than 10 mm and approximately 2 days seeing any precipitation. Planning without the concern for rain is generally straightforward during this very dry period.
What are the typical wind conditions in Vacaville during May?
The average wind speed in Vacaville during May is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
May rainfall patterns in Vacaville
Explore the daily rainfall trends and prepare for Vacavilles May weather 💧
UV exposure in Vacaville during May
Stay informed about UV levels for safe outdoor activities throughout the month of May ☀️
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Where is Vacaville?Get accurate weather forecasts for Vacaville, located at latitude 38.357 and longitude -121.988. Stay updated with localized weather information tailored for Vacaville.
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