Climate and monthly weather forecastCastaic, CA
Climate and monthly weather forecast
Weather in January
January in Castaic, California, is an enjoyable winter month, with temperature in the range of an average high of 61.2°F (16.2°C) and an average low of 43.9°F (6.6°C). In January, Castaic notes an average high-temperature of an enjoyable 61.2°F (16.2°C), hardly different from the preceding month. Weather in January »Weather in February
The last month of the winter, February, is another refreshing month in Castaic, California, with temperature in the range of an average high of 61.3°F (16.3°C) and an average low of 42.8°F (6°C). The beginning of February records an average high-temperature of a still refreshing 61.3°F (16.3°C), almost echoing the conditions of the previous month. Weather in February »Weather in March
March, the first month of the spring in Castaic, is still a refreshing month, with an average temperature fluctuating between 44.6°F (7°C) and 64.6°F (18.1°C). March begins with an average high-temperature of a still enjoyable 64.6°F (18.1°C), reflecting close similarity to the preceding month. Weather in March »Weather in April
April in Castaic, California, is a pleasant spring month, with an average temperature varying between 69.6°F (20.9°C) and 47.5°F (8.6°C). April's arrival shows an average high-temperature of a pleasant 69.6°F (20.9°C), hardly different from the previous month. Weather in April »Weather in May
May, the last month of the spring in Castaic, is a warm month, with an average temperature fluctuating between 73.9°F (23.3°C) and 51.8°F (11°C). May's average high-temperature stands at a moderately hot 73.9°F (23.3°C), showing little deviation from April's 69.6°F (20.9°C). Weather in May »Weather in June
The first month of the summer, June, is still a warm month in Castaic, California, with an average temperature ranging between max 81.7°F (27.6°C) and min 57.2°F (14°C). Castaic's transition into June is noticed by a slight rise in the average high-temperature, advancing from a warm 73.9°F (23.3°C) in May to a still moderately hot 81.7°F (27.6°C). Weather in June »Weather in July
July is a hot summer month in Castaic, California, with an average temperature ranging between min 63°F (17.2°C) and max 87.3°F (30.7°C). Castaic's transition into July brings a slight rise in the average high-temperature, moving from a warm 81.7°F (27.6°C) in June to a hot 87.3°F (30.7°C). Weather in July »Weather in August
August, the last month of the summer in Castaic, is another hot month, with an average temperature fluctuating between 63.7°F (17.6°C) and 88.2°F (31.2°C). During the warmest month, August, temperatures average a high of 88.2°F (31.2°C) and a low of 63.7°F (17.6°C). August's average heat index is evaluated at a tropical 89.6°F (32°C). Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in Castaic, California, with temperature in the range of an average low of 61°F (16.1°C) and an average high of 84.7°F (29.3°C). The commencement of September records an average high-temperature of a moderately hot 84.7°F (29.3°C), barely varying from August's 88.2°F (31.2°C). Weather in September »Weather in October
October, the same as September, is a moderately hot autumn month in Castaic, California, with temperature in the range of an average low of 55.8°F (13.2°C) and an average high of 76.6°F (24.8°C). In the transition to October, Castaic observes a minor drop in the average high-temperature, shifting from 84.7°F (29.3°C) in September to a still moderately hot 76.6°F (24.8°C). Weather in October »Weather in November
The last month of the autumn, November, is another pleasant month in Castaic, California, with an average temperature varying between 49.1°F (9.5°C) and 68°F (20°C). During the shift to November, a minor reduction in average high-temperature is observed, shifting from a warm 76.6°F (24.8°C) in October to a pleasant 68°F (20°C). Weather in November »Weather in December
The first month of the winter, December, is also a moderate month in Castaic, California, with temperature in the range of an average low of 42.3°F (5.7°C) and an average high of 59.5°F (15.3°C). December stands out as Castaic's coldest month, with temperatures ranging between an average high of 59.5°F (15.3°C) and a low of 42.3°F (5.7°C). Weather in December »Updated: Jul 5, 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 Castaic, during the entire year, the rain falls for 42.2 days and collects up to 6.77" (172mm) of precipitation.
February has the least sunshine of the year, with an average of 6.7h of sunshine.
February, November and December, with an average maximum UV index of 3, are months with the lowest UV index.
With an average relative humidity of 56%, March is the most humid month.
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 months with the least rainfall are June and August Rain falls for 0.7 days and accumulates 0.04" (1mm) of rain.
June has the longest days of the year, with an average of 14h and 24min of daylight.
June and July, with an average of 12.1h of sunshine, are months with the most sunshine.
The months with the highest UV index are June through August, with an average maximum UV index of 6.
Castaic's warmest temperatures are experienced in August, with average high temperatures of 88.2°F (31.2°C) and lows of 63.7°F (17.6°C).
The months with the lowest humidity are August and October, with an average relative humidity of 43%.
December, with its high-temperature average of 59.5°F (15.3°C) and a low-temperature average of 42.3°F (5.7°C), is the coldest month.
December is the month with the most rainfall. Rain falls for 5.3 days and accumulates 1.42" (36mm) of precipitation.
The month with the shortest days in Castaic is December, with an average of 9h and 54min of daylight.
Average temperature
Castaic, CA
The warmest month (with the highest average high temperature) is August (88.2°F).
The month with the lowest average high temperature is December (59.5°F).
The month with the highest average low temperature is August (63.7°F).
The coldest month (with the lowest average low temperature) is December (42.3°F).
Average pressure
Castaic, CA
- Average pressure in January:
30.11"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.04"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
29.93"Hg - Average pressure in June:
29.88"Hg
- Average pressure in July:
29.91"Hg - Average pressure in August:
29.9"Hg - Average pressure in September:
29.9"Hg - Average pressure in October:
29.96"Hg - Average pressure in November:
30.04"Hg - Average pressure in December:
30.08"Hg
The month with the highest atmospheric pressure is January (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed
Castaic, CA
- Average wind speed in January:
7.3mph - Average wind speed in February:
6.8mph - Average wind speed in March:
6.5mph - Average wind speed in April:
6.6mph - Average wind speed in May:
6.1mph - Average wind speed in June:
5.5mph
- Average wind speed in July:
5.1mph - Average wind speed in August:
4.9mph - Average wind speed in September:
5mph - Average wind speed in October:
6.2mph - Average wind speed in November:
6.7mph - Average wind speed in December:
7.3mph
The windiest months (with the highest average wind speed) are January and December (7.3mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).
Average humidity
Castaic, CA
The month with the highest relative humidity is March (56%).
The months with the lowest relative humidity are August and October (43%).
Average rainfall
Castaic, CA
- Average rainfall in January:
1.22" - Average rainfall in February:
1.34" - Average rainfall in March:
1.22" - Average rainfall in April:
0.51" - Average rainfall in May:
0.2" - Average rainfall in June:
0.04"
- Average rainfall in July:
0.08" - Average rainfall in August:
0.04" - Average rainfall in September:
0.08" - Average rainfall in October:
0.16" - Average rainfall in November:
0.47" - Average rainfall in December:
1.42"
The wettest month (with the highest rainfall) is December (1.42").
The driest months (with the least rainfall) are June and August (0.04").
Average rainfall days
Castaic, CA
- Average rainfall days in January:
5.3 days - Average rainfall days in February:
6 days - Average rainfall days in March:
6.9 days - Average rainfall days in April:
4.9 days - Average rainfall days in May:
2.9 days - Average rainfall days in June:
0.7 days
- Average rainfall days in July:
2.2 days - Average rainfall days in August:
0.8 days - Average rainfall days in September:
2.3 days - Average rainfall days in October:
2 days - Average rainfall days in November:
2.9 days - Average rainfall days in December:
5.3 days
The month with the highest number of rainy days is March (6.9 days).
The month with the least rainy days is June (0.7 days).
Average daylight / Average sunshine
Castaic, 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 6min - Average daylight in May:
14h and 0min - Average daylight in June:
14h and 24min
- Average daylight in July:
14h and 12min - 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:
9h and 54min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in January:
6h and 48min - Average sunshine in February:
6h and 42min - Average sunshine in March:
8h and 48min - Average sunshine in April:
11h and 6min - Average sunshine in May:
11h and 30min - Average sunshine in June:
12h and 6min
- Average sunshine in July:
12h and 6min - Average sunshine in August:
12h and 0min - Average sunshine in September:
10h and 54min - Average sunshine in October:
8h and 24min - Average sunshine in November:
7h and 18min - Average sunshine in December:
6h and 48min
The months with the most sunshine are June and July (Average sunshine: 12h and 6min).
The month with the least sunshine is February (Average sunshine: 6h and 42min).
Average sunshine days
Castaic, CA
- Average sunshine days in January:
25.2 days - Average sunshine days in February:
21.5 days - Average sunshine days in March:
23.5 days - Average sunshine days in April:
25 days - Average sunshine days in May:
27.1 days - Average sunshine days in June:
28.1 days
- Average sunshine days in July:
27.2 days - Average sunshine days in August:
28.7 days - Average sunshine days in September:
27 days - Average sunshine days in October:
28.1 days - Average sunshine days in November:
26.1 days - Average sunshine days in December:
24.9 days
The month with the most sunshine days is August (28.7 days).
The month with the least sunshine days is February (21.5 days).
Average UV index
Castaic, CA
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are February, November and December (UV index 3).
Average cloud cover
Castaic, CA
The month with the most cloud cover is March (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 4).
Average visibility
Castaic, 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).
