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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, like December, is another refreshing winter month in Riverdale, California, with an average temperature varying between 44.2°F (6.8°C) and 59.4°F (15.2°C). The shift to January signals an average high-temperature of a still refreshing 59.4°F (15.2°C), subtly varied from December's 57.2°F (14°C). Weather in January »
Weather in February
February, the last month of the winter in Riverdale, is a refreshing month, with an average temperature varying between 62.4°F (16.9°C) and 44.6°F (7°C). February brings a marginal elevation to a comfortable 62.4°F (16.9°C) from January's 59.4°F (15.2°C) in Riverdale's average high-temperatures. Weather in February »
Weather in March
The first month of the spring, March, is still a comfortable month in Riverdale, California, with an average temperature fluctuating between 47.8°F (8.8°C) and 67.8°F (19.9°C). The commencement of March sees a minor shift in the average high-temperature, moving from a comfortable 62.4°F (16.9°C) in February to a still refreshing 67.8°F (19.9°C). Weather in March »
Weather in April
April in Riverdale, California, is a warm spring month, with an average temperature fluctuating between 51.4°F (10.8°C) and 74.8°F (23.8°C). As Riverdale welcomes April, the average high-temperature displays a subtle shift, adjusting from a comfortable 67.8°F (19.9°C) in March to a warm 74.8°F (23.8°C). Weather in April »
Weather in May
May, the last month of the spring in Riverdale, is also a moderately hot month, with an average temperature ranging between min 57°F (13.9°C) and max 82.8°F (28.2°C). With the onset of May, Riverdale observes a minor temperature ascent, with the average high-temperature adjusting from April's 74.8°F (23.8°C) to a still warm 82.8°F (28.2°C). Weather in May »
Weather in June
The first month of the summer, June, is a hot month in Riverdale, California, with temperature in the range of an average high of 94.6°F (34.8°C) and an average low of 63.3°F (17.4°C). June's arrival brings a change in high-temperatures, moving from a warm 82.8°F (28.2°C) in May to a hot 94.6°F (34.8°C). Weather in June »
Weather in July
July in Riverdale, California, is a torrid summer month, with temperature in the range of an average low of 66.9°F (19.4°C) and an average high of 102.2°F (39°C). July, with its high-temperature average of 102.2°F (39°C) and a low-temperature average of 66.9°F (19.4°C), is the warmest month. Weather in July »
Weather in August
The last month of the summer, August, is also a sweltering month in Riverdale, California, with an average temperature varying between 66.2°F (19°C) and 100.9°F (38.3°C). The beginning of August reveals an average high-temperature of a still fiery hot 100.9°F (38.3°C), showing minimal deviation from the previous month. Weather in August »
Weather in September
September, the first month of the autumn in Riverdale, is still a hot month, with an average temperature varying between 63.1°F (17.3°C) and 94.1°F (34.5°C). The onset of September aligns with a soft reduction in the average high-temperature, gently falling from a torrid 100.9°F (38.3°C) in August to a hot 94.1°F (34.5°C). Weather in September »
Weather in October
October, the same as September, is another warm autumn month in Riverdale, California, with an average temperature varying between 56.5°F (13.6°C) and 80.4°F (26.9°C). Riverdale's average high-temperature decreases in October, falling from a hot 94.1°F (34.5°C) in September to a moderately hot 80.4°F (26.9°C). Weather in October »
Weather in November
The last month of the autumn, November, is also an enjoyable month in Riverdale, California, with temperature in the range of an average high of 67.3°F (19.6°C) and an average low of 48.7°F (9.3°C). November is characterized by a reduction in the average high-temperature, from a moderately hot 80.4°F (26.9°C) in October to an enjoyable 67.3°F (19.6°C). Weather in November »
Weather in December
December, the first month of the winter in Riverdale, is still a refreshing month, with temperature in the range of an average high of 57.2°F (14°C) and an average low of 43°F (6.1°C). Riverdale experiences its lowest average temperatures in December, reaching a peak of 57.2°F (14°C) and a minimum of 43°F (6.1°C). Weather in December »
[Resources]Frequently asked questions
What is the most humid month in Riverdale?
The months with the highest humidity are January and December, with an average relative humidity of 66%.
What is the rainiest month in Riverdale?
The wettest months are January through March, with an average 1.54" (39mm) of rainfall.
How much does it rain in Riverdale?
Throughout the year, there are 58.2 rainfall days, and 9.29" (236mm) of precipitation is accumulated.
When is the lowest UV index in Riverdale?
The months with the lowest UV index in Riverdale are January, November and December, with an average maximum UV index of 3.
When is Daylight Saving Time (DST) in Riverdale?
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 in Riverdale?
The month with the longest days in Riverdale, California, is June, with an average of 14h and 36min of daylight.
What is the month with the most sunshine in Riverdale?
June and July, with an average of 12.1h of sunshine, are months with the most sunshine in Riverdale.
What is the month with the highest UV index in Riverdale?
The months with the highest UV index in Riverdale are June through August, with an average maximum UV index of 7.
What are the warmest months in Riverdale?
Riverdale's warmest weather arrives in July, when temperatures average a high of 102.2°F (39°C) and a low of 66.9°F (19.4°C).
What is the least humid month in Riverdale?
With an average relative humidity of 30%, July is the least humid month in Riverdale.
What is the driest month in Riverdale?
August is the month with the least rainfall. Rain falls for 0.8 days and accumulates 0.08" (2mm) of precipitation.
What time of the year is the coldest in Riverdale?
The coldest time of the year in Riverdale is December, with temperatures averaging a high of 57.2°F (14°C) and a low of 43°F (6.1°C).
What is the month with the shortest days in Riverdale?
The month with the shortest days in Riverdale, California, is December, with an average of 9h and 42min of daylight.
What is the month with the least sunshine in Riverdale?
With an average of 6.4h of sunshine, December has the least sunshine of the year in Riverdale, California.
Average temperature
Riverdale, CA
The warmest month (with the highest average high temperature) is July (102.2°F).
The month with the lowest average high temperature is December (57.2°F).
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is December (43°F).
Average pressure
Riverdale, CA
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.06"Hg - Average pressure in April:
30"Hg - Average pressure in May:
29.94"Hg - Average pressure in June:
29.89"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 month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed
Riverdale, CA
- Average wind speed in January:
4.8mph - Average wind speed in February:
5.3mph - Average wind speed in March:
5.8mph - Average wind speed in April:
6.5mph - Average wind speed in May:
6.6mph - Average wind speed in June:
7.1mph
- Average wind speed in July:
6.3mph - Average wind speed in August:
6.2mph - Average wind speed in September:
5.7mph - Average wind speed in October:
5.4mph - Average wind speed in November:
4.8mph - Average wind speed in December:
4.9mph
The windiest month (with the highest average wind speed) is June (7.1mph).
The calmest months (with the lowest average wind speed) are January and November (4.8mph).
Average humidity
Riverdale, CA
The months with the highest relative humidity are January and December (66%).
The month with the lowest relative humidity is July (30%).
Average rainfall
Riverdale, CA
- Average rainfall in January:
1.54" - Average rainfall in February:
1.54" - Average rainfall in March:
1.54" - Average rainfall in April:
0.94" - Average rainfall in May:
0.51" - Average rainfall in June:
0.12"
- Average rainfall in July:
0.12" - Average rainfall in August:
0.08" - Average rainfall in September:
0.12" - Average rainfall in October:
0.47" - Average rainfall in November:
0.91" - Average rainfall in December:
1.42"
The wettest months (with the highest rainfall) are January, February and March (1.54").
The driest month (with the least rainfall) is August (0.08").
Average rainfall days
Riverdale, CA
- Average rainfall days in January:
7.3 days - Average rainfall days in February:
7.7 days - Average rainfall days in March:
9.6 days - Average rainfall days in April:
7 days - Average rainfall days in May:
4 days - Average rainfall days in June:
1.3 days
- Average rainfall days in July:
2.3 days - Average rainfall days in August:
0.8 days - Average rainfall days in September:
1.9 days - Average rainfall days in October:
3.4 days - Average rainfall days in November:
4.7 days - Average rainfall days in December:
8.2 days
The month with the highest number of rainy days is March (9.6 days).
The month with the least rainy days is August (0.8 days).
Average daylight / Average sunshine
Riverdale, CA
- Average daylight in January:
10h and 0min - 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 1min - Average daylight in June:
14h and 4min
- Average daylight in July:
14h and 2min - Average daylight in August:
13h and 3min - 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 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in January:
6h and 4min - Average sunshine in February:
6h and 3min - Average sunshine in March:
8h and 4min - Average sunshine in April:
10h and 5min - Average sunshine in May:
11h and 4min - Average sunshine in June:
12h and 1min
- Average sunshine in July:
12h and 1min - Average sunshine in August:
12h and 0min - Average sunshine in September:
11h and 2min - Average sunshine in October:
7h and 5min - Average sunshine in November:
7h and 0min - Average sunshine in December:
6h and 2min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).
Average sunshine days
Riverdale, CA
- Average sunshine days in January:
22.8 days - Average sunshine days in February:
19.4 days - Average sunshine days in March:
20.6 days - Average sunshine days in April:
22.5 days - Average sunshine days in May:
26.4 days - Average sunshine days in June:
27.9 days
- Average sunshine days in July:
27.5 days - Average sunshine days in August:
29.3 days - Average sunshine days in September:
27.4 days - Average sunshine days in October:
27 days - Average sunshine days in November:
24.5 days - Average sunshine days in December:
21.8 days
The month with the most sunshine days is August (29.3 days).
The month with the least sunshine days is February (19.4 days).
Average UV index
Riverdale, CA
The months with the highest UV index are June, July and August (UV index 7).
The months with the lowest UV index are January, November and December (UV index 3).
Average cloud cover
Riverdale, CA
The months with the most cloud cover are March and December (Cloud cover 28).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility
Riverdale, 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).
Riverdale, California, USA
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