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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
Weather in January
January is a moderate winter month in Rio Vista, California, with an average temperature varying between 41.5°F (5.3°C) and 55.9°F (13.3°C). Rio Vista signifies an average high-temperature of a refreshing 55.9°F (13.3°C) in January, closely mirroring the 55°F (12.8°C) of December. Weather in January »
Weather in February
The last month of the winter, February, is another mild month in Rio Vista, California, with an average temperature fluctuating between 42.3°F (5.7°C) and 59.7°F (15.4°C). The shift from January to February is characterized by an average high-temperature of a still mild 59.7°F (15.4°C), not significantly different from the 55.9°F (13.3°C) of January. Weather in February »
Weather in March
The first month of the spring, March, is a comfortable month in Rio Vista, California, with an average temperature varying between 43.7°F (6.5°C) and 63.7°F (17.6°C). Stepping into March, Rio Vista records an average high-temperature of a still refreshing 63.7°F (17.6°C), almost consistent with February. Weather in March »
Weather in April
April in Rio Vista, California, is a pleasant spring month, with temperature in the range of an average high of 69.6°F (20.9°C) and an average low of 46.8°F (8.2°C). In April, the meteorological conditions subtly change with the average high-temperature edging from a refreshing 63.7°F (17.6°C) in March to an agreeable 69.6°F (20.9°C). Weather in April »
Weather in May
May, the last month of the spring in Rio Vista, is a moderately hot month, with an average temperature varying between 76.6°F (24.8°C) and 51.1°F (10.6°C). The beginning of May marks a minor shift in the average high-temperature, moving from April's agreeable 69.6°F (20.9°C) to a warm 76.6°F (24.8°C). Weather in May »
Weather in June
The first month of the summer, June, is a tropical month in Rio Vista, California, with an average temperature fluctuating between 86.5°F (30.3°C) and 55.8°F (13.2°C). The rise of average high-temperatures is seen in June, with an increase from a warm 76.6°F (24.8°C) in May to a hot 86.5°F (30.3°C). Weather in June »
Weather in July
July, the same as June, in Rio Vista, California, is another tropical summer month, with an average temperature fluctuating between 91°F (32.8°C) and 57.2°F (14°C). Rio Vista records the warmest temperatures in July, averaging a high of 91°F (32.8°C) and a low of 57.2°F (14°C). July's average heat index is estimated at a very hot 96.8°F (36°C). Weather in July »
Weather in August
August, the last month of the summer in Rio Vista, is also a hot month, with temperature in the range of an average high of 90.1°F (32.3°C) and an average low of 57.7°F (14.3°C). With the onset of August, Rio Vista's average high-temperature clocks in at a still tropical 90.1°F (32.3°C), showing a minor fluctuation from the previous month. Weather in August »
Weather in September
September, the first month of the autumn in Rio Vista, is still a hot month, with an average temperature varying between 58.1°F (14.5°C) and 86.9°F (30.5°C). Rio Vista registers an average high-temperature of a still tropical 86.9°F (30.5°C) at the commencement of September, closely related to the preceding month. Weather in September »
Weather in October
October, like September, in Rio Vista, California, is a moderately hot autumn month, with an average temperature fluctuating between 54.1°F (12.3°C) and 76.5°F (24.7°C). The shift from September to October corresponds with a decrease in the average high-temperature, down to a warm 76.5°F (24.7°C) from a hot 86.9°F (30.5°C). Weather in October »
Weather in November
November, the last month of the autumn in Rio Vista, is another refreshing month, with an average temperature ranging between min 46.4°F (8°C) and max 63.9°F (17.7°C). November implies a gentle temperature shift, with average high-temperatures reducing from October's moderately hot 76.5°F (24.7°C) to a refreshing 63.9°F (17.7°C). Weather in November »
Weather in December
The first month of the winter, December, is also a fresh month in Rio Vista, California, with temperature in the range of an average low of 41.7°F (5.4°C) and an average high of 55°F (12.8°C). With average high and low temperatures of 55°F (12.8°C) and 41.7°F (5.4°C) respectively, December is Rio Vista's coldest month. Weather in December »
Updated: Aug 20, 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
What is the most humid month?
January and March, with an average relative humidity of 74%, are most humid months.
How much does it rain?
In Rio Vista, during the entire year, the rain falls for 68.7 days and collects up to 11.18" (284mm) of precipitation.
What are the months with the lowest UV index?
January, February, November and December, with an average maximum UV index of 3, are months with the lowest UV index in Rio Vista.
What is the wettest month?
The month with the most rainfall is February, when the rain falls for 8.6 days and typically aggregates up to 2.17" (55mm) of precipitation.
When is Daylight Saving Time (DST) in Rio Vista?
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.
When are the longest days?
June has the longest days of the year, with an average of 14h and 48min of daylight.
When is the highest UV index?
June through August, with an average maximum UV index of 6, are months with the highest UV index.
What is the hottest time of year?
July, recognised by an average high temperature of 91°F (32.8°C) and a low of 57.2°F (14°C), is Rio Vista's warmest month.
What month has the most sunshine?
July has the most sunshine of the year, with an average of 12.1h of sunshine.
What is the driest month?
August is the only month when rain does not fall.
What is the least humid month?
September is the least humid month, with an average relative humidity of 49%.
When does it rain?
January through July, September through December are months with rainfall.
What are the coldest months?
In Rio Vista, December records the average lowest temperatures, peaking at 55°F (12.8°C) and reaching a low of 41.7°F (5.4°C).
What is the month with the shortest days?
With an average of 9h and 36min of daylight, December has the shortest days of the year.
What is the month with the least sunshine?
December has the least sunshine of the year, with an average of 5.9h of sunshine.
Average temperature
Rio Vista, CA
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is December (55°F).
The month with the highest average low temperature is September (58.1°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).
Average pressure
Rio Vista, 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:
29.96"Hg - Average pressure in June:
29.91"Hg
- Average pressure in July:
29.92"Hg - Average pressure in August:
29.92"Hg - Average pressure in September:
29.92"Hg - Average pressure in October:
29.99"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
Rio Vista, CA
- Average wind speed in January:
4.8mph - Average wind speed in February:
6mph - Average wind speed in March:
6mph - Average wind speed in April:
6.6mph - Average wind speed in May:
7.3mph - Average wind speed in June:
7.6mph
- Average wind speed in July:
7.5mph - Average wind speed in August:
7mph - Average wind speed in September:
5.9mph - Average wind speed in October:
5.7mph - Average wind speed in November:
4.7mph - Average wind speed in December:
5.3mph
The windiest month (with the highest average wind speed) is June (7.6mph).
The calmest month (with the lowest average wind speed) is November (4.7mph).
Average humidity
Rio Vista, CA
The months with the highest relative humidity are January and March (74%).
The month with the lowest relative humidity is September (49%).
Average rainfall
Rio Vista, CA
- Average rainfall in January:
1.93" - Average rainfall in February:
2.17" - Average rainfall in March:
2.01" - Average rainfall in April:
0.79" - Average rainfall in May:
0.51" - Average rainfall in June:
0.08"
The wettest month (with the highest rainfall) is February (2.17").
The driest month (with the least rainfall) is August (0").
Average rainfall days
Rio Vista, CA
- Average rainfall days in January:
8.7 days - Average rainfall days in February:
8.6 days - Average rainfall days in March:
13 days - Average rainfall days in April:
7.7 days - Average rainfall days in May:
4.7 days - Average rainfall days in June:
1.5 days
- Average rainfall days in July:
0.8 days - Average rainfall days in August:
0.7 days - Average rainfall days in September:
1.6 days - Average rainfall days in October:
4.2 days - Average rainfall days in November:
7.5 days - Average rainfall days in December:
9.7 days
The month with the highest number of rainy days is March (13 days).
The month with the least rainy days is August (0.7 days).
Average daylight / Average sunshine
Rio Vista, 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:
6h and 1min - Average sunshine in February:
6h and 1min - Average sunshine in March:
8h and 0min - Average sunshine in April:
10h and 2min - Average sunshine in May:
11h and 1min - Average sunshine in June:
11h and 5min
- Average sunshine in July:
12h and 1min - Average sunshine in August:
12h and 0min - Average sunshine in September:
11h and 1min - Average sunshine in October:
7h and 1min - Average sunshine in November:
6h and 4min - Average sunshine in December:
5h and 5min
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 54min).
Average sunshine days
Rio Vista, CA
- Average sunshine days in January:
21.1 days - Average sunshine days in February:
18.5 days - Average sunshine days in March:
17.3 days - Average sunshine days in April:
20.8 days - Average sunshine days in May:
25.8 days - Average sunshine days in June:
28.1 days
- Average sunshine days in July:
29.8 days - Average sunshine days in August:
29.9 days - Average sunshine days in September:
27.7 days - Average sunshine days in October:
25.9 days - Average sunshine days in November:
22 days - Average sunshine days in December:
20.5 days
The month with the most sunshine days is August (29.9 days).
The month with the least sunshine days is March (17.3 days).
Average UV index
Rio Vista, 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
Rio Vista, CA
The months with the most cloud cover are March and December (Cloud cover 35).
The month with the least cloud cover is July (Cloud cover 4).
Average visibility
Rio Vista, 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).
Rio Vista, California, USA
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