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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
A colorful orange sunset skyline seen over the Napa River and Bridge in Vallejo, California
Weather in January
January, like December, is a moderate winter month in Vallejo, California, with an average temperature varying between 56.5°F (13.6°C) and 43°F (6.1°C). The beginning of January records an average high-temperature of a still refreshing 56.5°F (13.6°C), almost echoing the conditions of the previous month. Weather in January »
Weather in February
February, the last month of the winter in Vallejo, is another refreshing month, with an average temperature varying between 44.1°F (6.7°C) and 59.2°F (15.1°C). The arrival of February brings an average high-temperature of a still refreshing 59.2°F (15.1°C), closely following the temperature pattern of January. Weather in February »
Weather in March
The first month of the spring, March, is a comfortable month in Vallejo, California, with an average temperature fluctuating between 61.5°F (16.4°C) and 45°F (7.2°C). As Vallejo welcomes March, the average high-temperature stabilizes at an enjoyable 61.5°F (16.4°C), showing little deviation from February's 59.2°F (15.1°C). Weather in March »
Weather in April
April, like March, in Vallejo, California, is another enjoyable spring month, with an average temperature varying between 46.8°F (8.2°C) and 66.7°F (19.3°C). April brings an average high-temperature of a still enjoyable 66.7°F (19.3°C), showing a slight difference from March's 61.5°F (16.4°C). Weather in April »
Weather in May
The last month of the spring, May, is an agreeable month in Vallejo, California, with an average temperature fluctuating between 71.1°F (21.7°C) and 49.8°F (9.9°C). The transition into May reveals an average high-temperature of a pleasant 71.1°F (21.7°C), mirroring a close resemblance to April. Weather in May »
Weather in June
June, the first month of the summer in Vallejo, is a warm month, with an average temperature ranging between min 54.1°F (12.3°C) and max 77.7°F (25.4°C). The onset of June brings a minor temperature shift, with the average high-temperature moving from an agreeable 71.1°F (21.7°C) in May to a warm 77.7°F (25.4°C). Weather in June »
Weather in July
July, like June, in Vallejo, California, is a moderately hot summer month, with temperature in the range of an average high of 80.1°F (26.7°C) and an average low of 55.4°F (13°C). During July and September, Vallejo experiences its peak temperatures, averaging a high-temperature of 80.1°F (26.7°C). Weather in July »
Weather in August
The last month of the summer, August, is another warm month in Vallejo, California, with an average temperature varying between 56.5°F (13.6°C) and 79.7°F (26.5°C). The shift into August finds Vallejo at an average high-temperature of a still warm 79.7°F (26.5°C), closely comparable to July's conditions. Weather in August »
Weather in September
September, the first month of the autumn in Vallejo, is also a moderately hot month, with an average temperature ranging between max 80.1°F (26.7°C) and min 56.3°F (13.5°C). July and September, with an average high-temperature of 80.1°F (26.7°C), are the warmest months. Weather in September »
Weather in October
October, the same as September, in Vallejo, California, is an agreeable autumn month, with temperature in the range of an average low of 54°F (12.2°C) and an average high of 72.9°F (22.7°C). Vallejo, California, records a mild change in average high-temperature during October, easing from a moderately hot 80.1°F (26.7°C) in September to an agreeable 72.9°F (22.7°C). Weather in October »
Weather in November
November, the last month of the autumn in Vallejo, is also an enjoyable month, with temperature in the range of an average low of 47.7°F (8.7°C) and an average high of 63°F (17.2°C). The commencement of November indicates a shift in the average high-temperature, receding from October's agreeable 72.9°F (22.7°C) to an enjoyable 63°F (17.2°C). Weather in November »
Weather in December
December, the first month of the winter in Vallejo, is still a refreshing month, with an average temperature ranging between max 55.4°F (13°C) and min 43.2°F (6.2°C). During the coldest month, December, temperatures average a high of 55.4°F (13°C) and a low of 43.2°F (6.2°C). Weather in December »
[Resources]Frequently asked questions
How many days does it rain in Vallejo?
In Vallejo, California, during the entire year, the rain falls for 56.9 days and collects up to 4.88" (124mm) of precipitation.
What is the month with the lowest UV index in Vallejo?
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Vallejo, California.
What is the wettest month in Vallejo?
The month with the most rainfall is February, when the rain falls for 6.8 days and typically aggregates up to 1.14" (29mm) of precipitation.
What is the most humid month in Vallejo?
The most humid month in Vallejo is March, with an average relative humidity of 75%.
When is Daylight Saving Time (DST) in Vallejo?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Vallejo, 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.
When are the longest days in Vallejo?
June has the longest days of the year, with an average of 14h and 48min of daylight.
When is the highest UV index in Vallejo?
With an average maximum UV index of 6, June is the month with the highest UV index in Vallejo, California.
What part of the year is the hottest in Vallejo?
In Vallejo, the months of July and September are known for the peak temperatures, reaching an average high of 80.1°F (26.7°C).
What is the driest month in Vallejo?
The months with the least rainfall are July and August Rain falls for 1.5 days and accumulates 0.04" (1mm) of rain.
What month has the most sunshine in Vallejo?
The month with the most sunshine in Vallejo, California, is July, with an average of 12h of sunshine.
What is the least humid month in Vallejo?
September and October, with an average relative humidity of 60%, are the least humid months.
What time of the year is the coldest in Vallejo?
December brings the lowest temperatures in Vallejo, with an average high of 55.4°F (13°C) and an average low of 43.2°F (6.2°C).
What is the month with the shortest days in Vallejo?
The month with the shortest days in Vallejo, California, is December, with an average of 9h and 36min of daylight.
What is the month with the least sunshine in Vallejo?
With an average of 5.7h of sunshine, December has the least sunshine of the year in Vallejo, California.
Average temperature
Vallejo, CA
The warmest months (with the highest average high temperature) are July and September (80.1°F).
The month with the lowest average high temperature is December (55.4°F).
The month with the highest average low temperature is August (56.5°F).
The coldest month (with the lowest average low temperature) is January (43°F).
Average pressure
Vallejo, 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:
30.03"Hg - Average pressure in May:
29.97"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.92"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 month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed
Vallejo, CA
- Average wind speed in January:
4.9mph - Average wind speed in February:
5.7mph - Average wind speed in March:
6mph - Average wind speed in April:
6.5mph - Average wind speed in May:
7.1mph - Average wind speed in June:
6.9mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
6.2mph - Average wind speed in September:
5.5mph - Average wind speed in October:
5mph - Average wind speed in November:
4.6mph - Average wind speed in December:
5.2mph
The windiest month (with the highest average wind speed) is May (7.1mph).
The calmest month (with the lowest average wind speed) is November (4.6mph).
Average humidity
Vallejo, CA
The month with the highest relative humidity is March (75%).
The months with the lowest relative humidity are September and October (60%).
Average rainfall
Vallejo, CA
- Average rainfall in January:
0.83" - Average rainfall in February:
1.14" - Average rainfall in March:
0.75" - Average rainfall in April:
0.2" - Average rainfall in May:
0.28" - Average rainfall in June:
0.08"
- Average rainfall in July:
0.04" - Average rainfall in August:
0.04" - Average rainfall in September:
0.08" - Average rainfall in October:
0.2" - Average rainfall in November:
0.47" - Average rainfall in December:
0.79"
The wettest month (with the highest rainfall) is February (1.14").
The driest months (with the least rainfall) are July and August (0.04").
Average rainfall days
Vallejo, CA
- Average rainfall days in January:
7.7 days - Average rainfall days in February:
6.8 days - Average rainfall days in March:
10.2 days - Average rainfall days in April:
5.8 days - Average rainfall days in May:
3.6 days - Average rainfall days in June:
1.1 days
- Average rainfall days in July:
1.5 days - Average rainfall days in August:
0.9 days - Average rainfall days in September:
2.1 days - Average rainfall days in October:
3.4 days - Average rainfall days in November:
5.3 days - Average rainfall days in December:
8.5 days
The month with the highest number of rainy days is March (10.2 days).
The month with the least rainy days is August (0.9 days).
Average daylight / Average sunshine
Vallejo, CA
- Average daylight in January:
9h and 5min - Average daylight in February:
10h and 5min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 1min - Average daylight in May:
14h and 2min - Average daylight in June:
14h and 5min
- Average daylight in July:
14h and 3min - Average daylight in August:
13h and 4min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 1min - Average daylight in November:
10h and 1min - Average daylight in December:
9h and 4min
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 36min).
- Average sunshine in January:
5h and 5min - Average sunshine in February:
6h and 1min - Average sunshine in March:
7h and 4min - Average sunshine in April:
10h and 2min - Average sunshine in May:
10h and 5min - Average sunshine in June:
11h and 4min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
11h and 5min - Average sunshine in September:
11h and 1min - Average sunshine in October:
7h and 0min - Average sunshine in November:
6h and 3min - Average sunshine in December:
5h and 4min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days
Vallejo, CA
- Average sunshine days in January:
21.8 days - Average sunshine days in February:
20.1 days - Average sunshine days in March:
18.8 days - Average sunshine days in April:
22.8 days - Average sunshine days in May:
24.3 days - Average sunshine days in June:
26.7 days
- Average sunshine days in July:
27.2 days - Average sunshine days in August:
25.8 days - Average sunshine days in September:
26 days - Average sunshine days in October:
25.5 days - Average sunshine days in November:
23.6 days - Average sunshine days in December:
20.8 days
The month with the most sunshine days is July (27.2 days).
The month with the least sunshine days is March (18.8 days).
Average UV index
Vallejo, CA
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover
Vallejo, CA
The month with the most cloud cover is March (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 9).
Average visibility
Vallejo, 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).
Vallejo, California, USA
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