Climate and monthly weather forecastVacaville, CA
Climate and monthly weather forecast
Weather in January
January in Vacaville, California, is a mild winter month, with an average temperature ranging between max 55.8°F (13.2°C) and min 41.4°F (5.2°C). During January, Vacaville records an average high-temperature of a refreshing 55.8°F (13.2°C), marking a slight divergence from December's 54.7°F (12.6°C). Weather in January »Weather in February
February, the last month of the winter in Vacaville, is another mild month, with temperature in the range of an average high of 59.5°F (15.3°C) and an average low of 41.9°F (5.5°C). Vacaville records an average high-temperature of a still mild 59.5°F (15.3°C) as February arrives, nearly mirroring the previous month's climate. Weather in February »Weather in March
The first month of the spring, March, is a refreshing month in Vacaville, California, with an average temperature varying between 62.8°F (17.1°C) and 43.2°F (6.2°C). The transition into March notes an average high-temperature of a still refreshing 62.8°F (17.1°C), revealing a mild distinction from the 59.5°F (15.3°C) in February. Weather in March »Weather in April
April in Vacaville, California, is an agreeable spring month, with an average temperature ranging between max 69.4°F (20.8°C) and min 46.2°F (7.9°C). April introduces a marginal temperature uplift, with average high-temperatures adjusting from March's comfortable 62.8°F (17.1°C) to an agreeable 69.4°F (20.8°C). Weather in April »Weather in May
May, the last month of the spring in Vacaville, is a moderately hot month, with temperature in the range of an average high of 76.5°F (24.7°C) and an average low of 50.4°F (10.2°C). May's arrival signals a modest temperature shift, moving from a pleasant 69.4°F (20.8°C) in April to a moderately hot 76.5°F (24.7°C). Weather in May »Weather in June
June, the first month of the summer in Vacaville, is a hot month, with temperature in the range of an average low of 55.8°F (13.2°C) and an average high of 86°F (30°C). A shift in the average high-temperature is noticeable in June, changing from a moderately hot 76.5°F (24.7°C) in May to a hot 86°F (30°C). Weather in June »Weather in July
July, the same as June, in Vacaville, California, is another tropical summer month, with an average temperature ranging between max 91°F (32.8°C) and min 57.7°F (14.3°C). Vacaville's July weather, with an average high temperature of 91°F (32.8°C) and an average low temperature of 57.7°F (14.3°C), tends to be the warmest of the year. In July, the average heat index is appraised at a torrid 96.8°F (36°C). Weather in July »Weather in August
August, the last month of the summer in Vacaville, is another tropical month, with temperature in the range of an average high of 90.3°F (32.4°C) and an average low of 57.9°F (14.4°C). In August, Vacaville experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 91°F (32.8°C) in July to a still tropical 90.3°F (32.4°C). Weather in August »Weather in September
September, the first month of the autumn in Vacaville, is still a hot month, with temperature in the range of an average low of 58.1°F (14.5°C) and an average high of 86.9°F (30.5°C). Vacaville, California, starts September with an average high-temperature of a still tropical 86.9°F (30.5°C), hinting at a minimal fluctuation from August. Weather in September »Weather in October
October, the same as September, is a moderately hot autumn month in Vacaville, California, with an average temperature fluctuating between 76.5°F (24.7°C) and 54.1°F (12.3°C). October implies a gentle temperature shift, with average high-temperatures reducing from September's tropical 86.9°F (30.5°C) to a warm 76.5°F (24.7°C). Weather in October »Weather in November
The last month of the autumn, November, is also an enjoyable month in Vacaville, California, with an average temperature fluctuating between 46.6°F (8.1°C) and 63.5°F (17.5°C). Vacaville, California, observes a minor decrease in the average high-temperature with the arrival of November, falling from October's warm 76.5°F (24.7°C) to a comfortable 63.5°F (17.5°C). Weather in November »Weather in December
The first month of the winter, December, is also a fresh month in Vacaville, California, with an average temperature varying between 41.4°F (5.2°C) and 54.7°F (12.6°C). December, noted for its average high-temperature of 54.7°F (12.6°C) and an average low-temperature of 41.4°F (5.2°C), is considered the coldest month. Weather in December »Updated: Feb 9, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Throughout the year, in Vacaville, there are 47.1 rainfall days, and 4.17" (106mm) of precipitation is accumulated.
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Vacaville, California.
The month with the most rainfall in Vacaville, California, is February, when the rain falls for 6 days and typically aggregates up to 0.87" (22mm) of precipitation.
March is the most humid month in Vacaville, with an average relative humidity of 75%.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from PDT to PST.
The month with the longest days is June, with an average of 14h and 48min of daylight.
The months with the highest UV index in Vacaville, California, are June through August, with an average maximum UV index of 6.
Vacaville's temperatures tend to reach their peak averages in July, with a high of 91°F (32.8°C) and a low of 57.7°F (14.3°C).
The months with the least rainfall are July through September Rain falls for 1.1 days and accumulates 0.04" (1mm) of rain.
The month with the most sunshine is July, with an average of 12.1h of sunshine.
September is the least humid month in Vacaville, California, with an average relative humidity of 48%.
The lowest temperatures in Vacaville are recorded in December, with averages reaching a high of 54.7°F (12.6°C) and a low of 41.4°F (5.2°C).
December has the shortest days of the year in Vacaville, California, with an average of 9h and 30min of daylight.
With an average of 5.7h of sunshine, December has the least sunshine of the year in Vacaville.
Average temperature
Vacaville, CA
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is December (54.7°F).
The month with the highest average low temperature is September (58.1°F).
The coldest months (with the lowest average low temperature) are January and December (41.4°F).
Average pressure
Vacaville, CA
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
30.02"Hg - Average pressure in May:
29.96"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.92"Hg - Average pressure in August:
29.91"Hg - Average pressure in September:
29.92"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June and August (29.91"Hg).
Average wind speed
Vacaville, CA
- Average wind speed in January:
4.7mph - Average wind speed in February:
5.8mph - Average wind speed in March:
5.8mph - Average wind speed in April:
6.2mph - Average wind speed in May:
6.8mph - Average wind speed in June:
6.8mph
- Average wind speed in July:
6.7mph - Average wind speed in August:
6.3mph - Average wind speed in September:
5.5mph - Average wind speed in October:
5.3mph - Average wind speed in November:
4.7mph - Average wind speed in December:
5.2mph
The windiest months (with the highest average wind speed) are May and June (6.8mph).
The calmest months (with the lowest average wind speed) are January and November (4.7mph).
Average humidity
Vacaville, CA
The month with the highest relative humidity is March (75%).
The month with the lowest relative humidity is September (48%).
Average rainfall
Vacaville, CA
- Average rainfall in January:
0.83" - Average rainfall in February:
0.87" - Average rainfall in March:
0.51" - Average rainfall in April:
0.31" - Average rainfall in May:
0.24" - Average rainfall in June:
0.08"
- Average rainfall in July:
0.04" - Average rainfall in August:
0.04" - Average rainfall in September:
0.04" - Average rainfall in October:
0.24" - Average rainfall in November:
0.35" - Average rainfall in December:
0.63"
The wettest month (with the highest rainfall) is February (0.87").
The driest months (with the least rainfall) are July, August and September (0.04").
Average rainfall days
Vacaville, CA
- Average rainfall days in January:
7 days - Average rainfall days in February:
6 days - Average rainfall days in March:
7.2 days - Average rainfall days in April:
5.7 days - Average rainfall days in May:
3.6 days - Average rainfall days in June:
1.3 days
- Average rainfall days in July:
1.1 days - Average rainfall days in August:
1 days - Average rainfall days in September:
1.4 days - Average rainfall days in October:
2.6 days - Average rainfall days in November:
3.6 days - Average rainfall days in December:
6.6 days
The month with the highest number of rainy days is March (7.2 days).
The month with the least rainy days is August (1 days).
Average daylight / Average sunshine
Vacaville, CA
- Average daylight in January:
9h and 54min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 18min - Average daylight in June:
14h and 48min
- Average daylight in July:
14h and 30min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 6min - Average daylight in December:
9h and 30min
The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January:
5h and 48min - Average sunshine in February:
5h and 54min - Average sunshine in March:
7h and 42min - Average sunshine in April:
10h and 6min - Average sunshine in May:
11h and 0min - Average sunshine in June:
11h and 42min
- Average sunshine in July:
12h and 6min - Average sunshine in August:
11h and 54min - Average sunshine in September:
11h and 12min - Average sunshine in October:
7h and 6min - Average sunshine in November:
6h and 24min - Average sunshine in December:
5h and 42min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days
Vacaville, CA
- Average sunshine days in January:
23 days - Average sunshine days in February:
21.5 days - Average sunshine days in March:
23 days - Average sunshine days in April:
23.4 days - Average sunshine days in May:
26.5 days - Average sunshine days in June:
28.1 days
- Average sunshine days in July:
29.8 days - Average sunshine days in August:
29.7 days - Average sunshine days in September:
27.8 days - Average sunshine days in October:
27.8 days - Average sunshine days in November:
26 days - Average sunshine days in December:
23.5 days
The month with the most sunshine days is July (29.8 days).
The month with the least sunshine days is February (21.5 days).
Average UV index
Vacaville, CA
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover
Vacaville, CA
The months with the most cloud cover are March and December (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 5).
Average visibility
Vacaville, CA
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
