Climate and monthly weather forecastRio Dell, CA
Climate and monthly weather forecast
Weather in January
January, the same as December, is a cool winter month in Rio Dell, California, with temperature in the range of an average high of 54.3°F (12.4°C) and an average low of 41.4°F (5.2°C). January's arrival brings an average high-temperature of a still cool 54.3°F (12.4°C), demonstrating subtle variation from the preceding month. Weather in January »Weather in February
February, the last month of the winter in Rio Dell, is also a fresh month, with an average temperature fluctuating between 53.6°F (12°C) and 39.7°F (4.3°C). The introduction of February notes a subtle temperature variation to a still fresh 53.6°F (12°C) from January's 54.3°F (12.4°C). Weather in February »Weather in March
The first month of the spring, March, is also a fresh month in Rio Dell, California, with an average temperature fluctuating between 54.9°F (12.7°C) and 40.3°F (4.6°C). Upon the onset of March, Rio Dell witnesses an average high-temperature of a still fresh 54.9°F (12.7°C), showing a close resemblance to the prior month. Weather in March »Weather in April
April is a refreshing spring month in Rio Dell, California, with temperature in the range of an average low of 41.5°F (5.3°C) and an average high of 58.5°F (14.7°C). As April unfolds, the average high-temperature reaches a mild 58.5°F (14.7°C), hinting at a slight fluctuation from the previous month. Weather in April »Weather in May
May, the last month of the spring in Rio Dell, is an enjoyable month, with temperature in the range of an average high of 63°F (17.2°C) and an average low of 44.1°F (6.7°C). Rio Dell's average high-temperature in May sits at a still refreshing 63°F (17.2°C), showing little difference from the previous month. Weather in May »Weather in June
The first month of the summer, June, is also an enjoyable month in Rio Dell, California, with an average temperature fluctuating between 67.8°F (19.9°C) and 48.7°F (9.3°C). June's commencement is accompanied by an average high-temperature of a still refreshing 67.8°F (19.9°C), diverging marginally from May's 63°F (17.2°C). Weather in June »Weather in July
July in Rio Dell, California, is an agreeable summer month, with an average temperature ranging between min 51.4°F (10.8°C) and max 73°F (22.8°C). July records an average high-temperature of a pleasant 73°F (22.8°C), indicating a minor variation from the preceding month. Weather in July »Weather in August
The last month of the summer, August, is a warm month in Rio Dell, California, with an average temperature fluctuating between 74.1°F (23.4°C) and 51.8°F (11°C). Rio Dell records the warmest temperatures in August, averaging a high of 74.1°F (23.4°C) and a low of 51.8°F (11°C). Weather in August »Weather in September
The first month of the autumn, September, is still a pleasant month in Rio Dell, California, with an average temperature ranging between max 72.5°F (22.5°C) and min 50.9°F (10.5°C). September's weather displays an average high-temperature of an agreeable 72.5°F (22.5°C), slightly varied from August's 74.1°F (23.4°C). Weather in September »Weather in October
October, like September, in Rio Dell, California, is another refreshing autumn month, with temperature in the range of an average high of 66.2°F (19°C) and an average low of 47.8°F (8.8°C). The shift from September to October includes a minor decrease in the average high-temperature, lightly dropping from an agreeable 72.5°F (22.5°C) to a comfortable 66.2°F (19°C). Weather in October »Weather in November
The last month of the autumn, November, is another refreshing month in Rio Dell, California, with an average temperature varying between 58.1°F (14.5°C) and 43.5°F (6.4°C). Rio Dell's progression into November involves a gentle drop in the average high-temperature, from a comfortable 66.2°F (19°C) in October to a moderate 58.1°F (14.5°C). Weather in November »Weather in December
December, the first month of the winter in Rio Dell, is also a fresh month, with an average temperature ranging between max 52.9°F (11.6°C) and min 40.1°F (4.5°C). December, known for its average high temperature of 52.9°F (11.6°C) and an average low temperature of 40.1°F (4.5°C), is the coldest month. Weather in December »Updated: Aug 21, 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
In Rio Dell, during the entire year, the rain falls for 110.9 days and collects up to 28.27" (718mm) of precipitation.
In Rio Dell, snow does not fall in January, March through December.
In Rio Dell, during the entire year, snow aggregates up to 0.59" (15mm).
January through March, November and December, with an average maximum UV index of 3, are months with the lowest UV index.
February is the only month when snow falls.
February is the month with the most snowfall. Snow falls for 0.3 days and accumulates 0.59" (15mm) of snow.
March is the most humid month, with an average relative humidity of 83%.
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 15h and 0min of daylight.
June through August, with an average maximum UV index of 5, are months with the highest UV index.
July is the month with the least rainfall. Rain falls for 1.8 days and accumulates 0.08" (2mm) of precipitation.
July and August, with an average of 11.6h of sunshine, are months with the most sunshine in Rio Dell.
The warmest period is August, when temperatures fluctuate between an average high of 74.1°F (23.4°C) and a low of 51.8°F (11°C).
The least humid month is September, with an average relative humidity of 73%.
December tends to be the coldest month, with temperatures averaging a daily high of 52.9°F (11.6°C) and a low of 40.1°F (4.5°C).
December is the month with the most rainfall. Rain falls for 14.8 days and accumulates 4.96" (126mm) of precipitation.
December has the shortest days of the year in Rio Dell, with an average of 9h and 18min of daylight.
With an average of 5h of sunshine, December has the least sunshine of the year.
Average temperature
Rio Dell, CA
The warmest month (with the highest average high temperature) is August (74.1°F).
The month with the lowest average high temperature is December (52.9°F).
The month with the highest average low temperature is August (51.8°F).
The coldest month (with the lowest average low temperature) is February (39.7°F).
Average pressure
Rio Dell, CA
- Average pressure in January:
30.13"Hg - Average pressure in February:
30.09"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
30.06"Hg - Average pressure in May:
30.01"Hg - Average pressure in June:
29.98"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
29.96"Hg - Average pressure in September:
29.96"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.08"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are August and September (29.96"Hg).
Average wind speed
Rio Dell, CA
- Average wind speed in January:
6.8mph - Average wind speed in February:
7.5mph - Average wind speed in March:
7.6mph - Average wind speed in April:
7.4mph - Average wind speed in May:
7.2mph - Average wind speed in June:
7.7mph
- Average wind speed in July:
6.6mph - Average wind speed in August:
5.9mph - Average wind speed in September:
6mph - Average wind speed in October:
6.5mph - Average wind speed in November:
6.6mph - Average wind speed in December:
7mph
The windiest month (with the highest average wind speed) is June (7.7mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).
Average humidity
Rio Dell, CA
The month with the highest relative humidity is March (83%).
The month with the lowest relative humidity is September (73%).
Average rainfall
Rio Dell, CA
- Average rainfall in January:
4.41" - Average rainfall in February:
3.98" - Average rainfall in March:
4.53" - Average rainfall in April:
2.28" - Average rainfall in May:
1.69" - Average rainfall in June:
0.51"
- Average rainfall in July:
0.08" - Average rainfall in August:
0.12" - Average rainfall in September:
0.59" - Average rainfall in October:
1.89" - Average rainfall in November:
3.23" - Average rainfall in December:
4.96"
The wettest month (with the highest rainfall) is December (4.96").
The driest month (with the least rainfall) is July (0.08").
Average rainfall days
Rio Dell, CA
- Average rainfall days in January:
13.8 days - Average rainfall days in February:
13.3 days - Average rainfall days in March:
17.3 days - Average rainfall days in April:
12.3 days - Average rainfall days in May:
8.1 days - Average rainfall days in June:
4.6 days
- Average rainfall days in July:
1.8 days - Average rainfall days in August:
1.8 days - Average rainfall days in September:
4 days - Average rainfall days in October:
8 days - Average rainfall days in November:
11.1 days - Average rainfall days in December:
14.8 days
The month with the highest number of rainy days is March (17.3 days).
The months with the least rainy days are July and August (1.8 days).
Average snowfall
Rio Dell, CA
The month with the highest snowfall is February (0.59").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days
Rio Dell, CA
- Average snowfall days in January:
0 days - Average snowfall days in February:
0.3 days - Average snowfall days in March:
0 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0.1 days
The month with the highest number of snowfall days is February (0.3 days).
The months with the least snowfall days are January, March, April, May, June, July, August, September, October and November (0 days).
Average daylight / Average sunshine
Rio Dell, CA
- Average daylight in January:
9h and 42min - Average daylight in February:
10h and 42min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 18min - Average daylight in May:
14h and 30min - Average daylight in June:
15h and 0min
- Average daylight in July:
14h and 42min - Average daylight in August:
13h and 42min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 6min - Average daylight in November:
9h and 54min - Average daylight in December:
9h and 18min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January:
5h and 12min - Average sunshine in February:
5h and 24min - Average sunshine in March:
6h and 30min - Average sunshine in April:
8h and 42min - Average sunshine in May:
9h and 54min - Average sunshine in June:
10h and 54min
- Average sunshine in July:
11h and 36min - Average sunshine in August:
11h and 36min - Average sunshine in September:
10h and 12min - Average sunshine in October:
6h and 36min - Average sunshine in November:
5h and 54min - Average sunshine in December:
5h and 0min
The months with the most sunshine are July and August (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days
Rio Dell, CA
- Average sunshine days in January:
15.6 days - Average sunshine days in February:
14.1 days - Average sunshine days in March:
11.9 days - Average sunshine days in April:
15.4 days - Average sunshine days in May:
21.1 days - Average sunshine days in June:
23.8 days
- Average sunshine days in July:
28.5 days - Average sunshine days in August:
27.9 days - Average sunshine days in September:
25.8 days - Average sunshine days in October:
22.1 days - Average sunshine days in November:
17.3 days - Average sunshine days in December:
15.1 days
The month with the most sunshine days is July (28.5 days).
The month with the least sunshine days is March (11.9 days).
Average UV index
Rio Dell, CA
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 3).
Average cloud cover
Rio Dell, CA
The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility
Rio Dell, CA
The months with the highest visibility are January, February, March, April, June, September, October, November and December (6mi).
The months with the lowest visibility are May, July and August (5mi).
