Annual mean 16°C · wettest around January · prevailing wind W
Warmest
28.8 °C
Coldest
11.6 °C
Wettest
28%
Windiest
4.6 m/s
Prevailing
W
3.9 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Vacaville over the whole year is 16°C. July is the hottest month, with highs of about 28°C; December is the coldest, with lows of about 6°C. The rainy (wet) season in Vacaville runs from October to May, peaking in January with a 29% chance of rain on a given day. The dry season is June to September; July is the driest month, at 6%. Winds in Vacaville are highest in June, averaging 4.4 m/s (16 km/h), and lightest in November, at 2.2 m/s (8 km/h). The prevailing wind is from the W. The clearest skies in Vacaville come in July, when the sky is typically 5% covered; January is the cloudiest month, at 40%.
Month by month Vacaville climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
13°C
7°C
10°C
29%
40%
2.5 m/s
10
0
75
February
15°C
7°C
11°C
28%
25%
2.9 m/s
25
0
76
March
16°C
8°C
13°C
29%
33%
3.2 m/s
35
1
81
April
20°C
10°C
17°C
20%
20%
3.5 m/s
67
10
80
May
23°C
13°C
20°C
21%
15%
4.2 m/s
73
26
63
June
27°C
16°C
25°C
9%
7%
4.4 m/s
62
48
37
July
28°C
16°C
27°C
6%
5%
4.4 m/s
50
59
24
August
28°C
16°C
27°C
8%
8%
4.0 m/s
51
61
23
September
27°C
15°C
25°C
10%
9%
3.4 m/s
65
51
36
October
24°C
12°C
21°C
19%
12%
2.7 m/s
79
25
65
November
17°C
8°C
14°C
24%
24%
2.2 m/s
44
1
88
December
12°C
6°C
10°C
29%
36%
2.3 m/s
9
0
74
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Vacaville weather by season
Year round, Vacaville has days of about 12°C at their warmest in December, its coolest month, and 28°C in July, its warmest; the coolest hours of the day run from 6°C to 16°C through the year, and the average temperature over the year is 16°C around the clock. Rain is most likely around January and least likely around July. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Vacaville weather in winterDecember to February
High 13°CLow 7°CRain 29%
Winter in Vacaville has typical daily highs of about 13°C and lows of about 7°C, with a 29% chance of rain on a given day.
Vacaville weather in springMarch to May
High 20°CLow 10°CRain 23%
Spring in Vacaville has typical daily highs of about 20°C and lows of about 10°C, with a 23% chance of rain on a given day.
Vacaville weather in summerJune to August
High 28°CLow 16°CRain 8%
Summer in Vacaville has typical daily highs of about 28°C and lows of about 16°C, with a 8% chance of rain on a given day.
Vacaville weather in autumnSeptember to November
High 22°CLow 12°CRain 18%
Autumn in Vacaville has typical daily highs of about 22°C and lows of about 12°C, with a 18% chance of rain on a given day.
When is the rainy season in Vacaville?
The rainy (wet) season in Vacaville runs from October to May, peaking in January with a 29% chance of rain on a given day. The dry season is June to September; July is the driest month, at 6%.
What time of year is Vacaville windiest?
Winds in Vacaville are highest in June, averaging 4.4 m/s (16 km/h), and lightest in November, at 2.2 m/s (8 km/h). The prevailing wind is from the W.
What is the average temperature in Vacaville year round?
The average temperature in Vacaville over the whole year is 16°C. July is the hottest month, with highs of about 28°C; December is the coldest, with lows of about 6°C.