Climate and monthly weather forecastFountain Valley, CA
Climate and monthly weather forecast
Weather in January
January, like December, in Fountain Valley, California, is another enjoyable winter month, with an average temperature ranging between min 52.9°F (11.6°C) and max 64.6°F (18.1°C). Fountain Valley, California, experiences an average high-temperature of a still enjoyable 64.6°F (18.1°C) in January, subtly different from December's 62.6°F (17°C). Weather in January »Weather in February
The last month of the winter, February, is also an enjoyable month in Fountain Valley, California, with an average temperature ranging between max 63.9°F (17.7°C) and min 51.8°F (11°C). As Fountain Valley, California, transitions from January to February, the average high-temperatures adjust to a still comfortable 63.9°F (17.7°C), nearly the same as the previous 64.6°F (18.1°C). Weather in February »Weather in March
March, the first month of the spring in Fountain Valley, is also an enjoyable month, with an average temperature fluctuating between 65.3°F (18.5°C) and 53.2°F (11.8°C). March reports an average high-temperature of a still refreshing 65.3°F (18.5°C), slightly varied from February's 63.9°F (17.7°C). Weather in March »Weather in April
April, like March, in Fountain Valley, California, is another refreshing spring month, with an average temperature fluctuating between 67.5°F (19.7°C) and 54.3°F (12.4°C). As Fountain Valley welcomes April, the average high-temperature stabilizes at a still refreshing 67.5°F (19.7°C), showing little deviation from March's 65.3°F (18.5°C). Weather in April »Weather in May
The last month of the spring, May, is an agreeable month in Fountain Valley, California, with an average temperature fluctuating between 68.7°F (20.4°C) and 56.8°F (13.8°C). With the onset of May, Fountain Valley's average high-temperature clocks in at a pleasant 68.7°F (20.4°C), showing a minor fluctuation from the previous month. Weather in May »Weather in June
June, the first month of the summer in Fountain Valley, is also an agreeable month, with an average temperature fluctuating between 72.1°F (22.3°C) and 59°F (15°C). In the transition from May to June, Fountain Valley reports an average high-temperature of a still agreeable 72.1°F (22.3°C), indicating a close resemblance to the prior month. Weather in June »Weather in July
July is a warm summer month in Fountain Valley, California, with an average temperature varying between 76.6°F (24.8°C) and 63.1°F (17.3°C). July's presence marks an average high-temperature of a moderately hot 76.6°F (24.8°C), subtly varied from June's 72.1°F (22.3°C). Weather in July »Weather in August
August, the last month of the summer in Fountain Valley, is another warm month, with an average temperature varying between 65.1°F (18.4°C) and 78.1°F (25.6°C). Fountain Valley's warmest temperatures are experienced in August, with average high temperatures of 78.1°F (25.6°C) and lows of 65.1°F (18.4°C). Weather in August »Weather in September
September, the first month of the autumn in Fountain Valley, is also a moderately hot month, with an average temperature ranging between min 64.8°F (18.2°C) and max 77.5°F (25.3°C). Fountain Valley transitions into September recording an average high-temperature of a still moderately hot 77.5°F (25.3°C), closely aligning with the preceding month's temperature. Weather in September »Weather in October
October, the same as September, is a moderately hot autumn month in Fountain Valley, California, with an average temperature fluctuating between 74.3°F (23.5°C) and 62.1°F (16.7°C). In October, Fountain Valley's weather conditions record an average high-temperature of a still moderately hot 74.3°F (23.5°C), demonstrating little divergence from the preceding month. Weather in October »Weather in November
The last month of the autumn, November, is another pleasant month in Fountain Valley, California, with an average temperature varying between 69.3°F (20.7°C) and 57.7°F (14.3°C). The transition from October to November sees an average high-temperature of an agreeable 69.3°F (20.7°C), indicating a minor variance from the prior month. Weather in November »Weather in December
The first month of the winter, December, is still a refreshing month in Fountain Valley, California, with an average temperature ranging between min 52.7°F (11.5°C) and max 62.6°F (17°C). The month of December, characterized by an average high of 62.6°F (17°C) and a low of 52.7°F (11.5°C), is recognized as the coldest. 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
In Fountain Valley, California, during the entire year, the rain falls for 59.1 days and collects up to 8.86" (225mm) of precipitation.
The months with the lowest UV index in Fountain Valley, California, are January through March, November and December, with an average maximum UV index of 4.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Fountain Valley, California, 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.
June is the most humid month in Fountain Valley, California, with an average relative humidity of 72%.
June is the month with the least rainfall in Fountain Valley, California. Rain falls for 2.3 days and accumulates 0.04" (1mm) of precipitation.
The month with the longest days is June, with an average of 14h and 24min of daylight.
The months with the most sunshine are July and August, with an average of 12h of sunshine.
The months with the highest UV index in Fountain Valley are July through September, with an average maximum UV index of 6.
August is the month when Fountain Valley, California, sees the average highest temperatures, with a high of 78.1°F (25.6°C) and a low of 65.1°F (18.4°C).
With an average relative humidity of 56%, November is the least humid month.
Fountain Valley, California, experiences its average lowest temperatures in December, reaching a peak of 62.6°F (17°C) and a minimum of 52.7°F (11.5°C).
December is the month with the most rainfall. Rain falls for 7.1 days and accumulates 1.81" (46mm) of precipitation.
The month with the shortest days in Fountain Valley, California, is December, with an average of 10h and 0min of daylight.
The month with the least sunshine in Fountain Valley, California, is December, with an average of 6.6h of sunshine.
Average temperature
Fountain Valley, CA
The warmest month (with the highest average high temperature) is August (78.1°F).
The month with the lowest average high temperature is December (62.6°F).
The month with the highest average low temperature is August (65.1°F).
The coldest month (with the lowest average low temperature) is February (51.8°F).
Average pressure
Fountain Valley, CA
- Average pressure in January:
30.1"Hg - Average pressure in February:
30.05"Hg - Average pressure in March:
30.03"Hg - Average pressure in April:
29.97"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.89"Hg
- Average pressure in July:
29.92"Hg - Average pressure in August:
29.9"Hg - Average pressure in September:
29.89"Hg - Average pressure in October:
29.95"Hg - Average pressure in November:
30.03"Hg - Average pressure in December:
30.07"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The months with the lowest atmospheric pressure are June and September (29.89"Hg).
Average wind speed
Fountain Valley, CA
- Average wind speed in January:
5.4mph - Average wind speed in February:
5.7mph - Average wind speed in March:
5.9mph - Average wind speed in April:
6.5mph - Average wind speed in May:
6.3mph - Average wind speed in June:
5.7mph
- Average wind speed in July:
5.5mph - Average wind speed in August:
5.3mph - Average wind speed in September:
5.2mph - Average wind speed in October:
5.2mph - Average wind speed in November:
5.5mph - Average wind speed in December:
5.5mph
The windiest month (with the highest average wind speed) is April (6.5mph).
The calmest months (with the lowest average wind speed) are September and October (5.2mph).
Average humidity
Fountain Valley, CA
The month with the highest relative humidity is June (72%).
The month with the lowest relative humidity is November (56%).
Average rainfall
Fountain Valley, CA
- Average rainfall in January:
1.54" - Average rainfall in February:
1.61" - Average rainfall in March:
1.1" - Average rainfall in April:
0.51" - Average rainfall in May:
0.28" - Average rainfall in June:
0.04"
- Average rainfall in July:
0.28" - Average rainfall in August:
0.2" - Average rainfall in September:
0.24" - Average rainfall in October:
0.43" - Average rainfall in November:
0.83" - Average rainfall in December:
1.81"
The wettest month (with the highest rainfall) is December (1.81").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days
Fountain Valley, CA
- Average rainfall days in January:
5.5 days - Average rainfall days in February:
6.3 days - Average rainfall days in March:
7.9 days - Average rainfall days in April:
6.4 days - Average rainfall days in May:
4.7 days - Average rainfall days in June:
2.3 days
- Average rainfall days in July:
3.8 days - Average rainfall days in August:
2.1 days - Average rainfall days in September:
3.1 days - Average rainfall days in October:
4.7 days - Average rainfall days in November:
5.2 days - Average rainfall days in December:
7.1 days
The month with the highest number of rainy days is March (7.9 days).
The month with the least rainy days is August (2.1 days).
Average daylight / Average sunshine
Fountain Valley, CA
- Average daylight in January:
10h and 12min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 0min - Average daylight in May:
13h and 54min - Average daylight in June:
14h and 24min
- Average daylight in July:
14h and 6min - Average daylight in August:
13h and 24min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 18min - Average daylight in November:
10h and 24min - Average daylight in December:
10h and 0min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January:
6h and 48min - Average sunshine in February:
6h and 48min - Average sunshine in March:
8h and 42min - Average sunshine in April:
10h and 54min - Average sunshine in May:
11h and 6min - Average sunshine in June:
11h and 42min
- Average sunshine in July:
12h and 0min - Average sunshine in August:
12h and 0min - Average sunshine in September:
10h and 36min - Average sunshine in October:
8h and 24min - Average sunshine in November:
7h and 6min - Average sunshine in December:
6h and 36min
The months with the most sunshine are July and August (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 6h and 36min).
Average sunshine days
Fountain Valley, CA
- Average sunshine days in January:
23.9 days - Average sunshine days in February:
20 days - Average sunshine days in March:
21.4 days - Average sunshine days in April:
21.5 days - Average sunshine days in May:
22.8 days - Average sunshine days in June:
24.9 days
- Average sunshine days in July:
25.7 days - Average sunshine days in August:
26.8 days - Average sunshine days in September:
24.2 days - Average sunshine days in October:
23 days - Average sunshine days in November:
22.8 days - Average sunshine days in December:
22.9 days
The month with the most sunshine days is August (26.8 days).
The month with the least sunshine days is February (20 days).
Average UV index
Fountain Valley, CA
The months with the highest UV index are July, August and September (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 4).
Average cloud cover
Fountain Valley, CA
The months with the most cloud cover are March and December (Cloud cover 24).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility
Fountain Valley, 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).
