Climate - San Fernando (California)

The climate of San Fernando is subtropical semi-arid, with very mild, relatively rainy winters and hot, sunny summers.
The city is located in the homonymous valley, north-west of Los Angeles, and at an altitude of 300 meters (1,000 feet). San Fernando valley has a climate not much different from that of Los Angeles, but it is a little colder on winter nights and a little warmer in summer, because the Santa Monica Mountains separate it from the ocean. However, here too, sometimes there can be days that are a bit cool, in May (with highs around 17 °C or 63 °F) and in early June (with highs around 20 °C or 68 °F).
On the coldest nights of the year, the temperature generally drops to 1/2 °C (34/36 °F). Snow is extremely rare, although it snowed in 1949.
On the hottest days of the year, which can also occur in September, the temperature generally reaches 41/42 °C (106/108 °F), but sometimes as high as 45 °C (113 °F). This happens when the Santa Ana winds blow from the deserts of Nevada.
For the climate averages, we can refer to the neighboring city of Van Nuys.
The average temperature of the coldest month (December) is of 13.4 °C (56.2 °F), that of the warmest month (August) is of 26.1 °C (79 °F). Here are the average temperatures.

Precipitation amounts to 340 millimeters (13.4 inches) per year: it is therefore scarce (although in winter there may be periods of bad weather). It ranges from 0 mm (0 in) in the driest months (June, July, August) to 95 mm (3.7 in) in the wettest (February). Here is the average precipitation.

On average, there are around 3,440 sunshine hours per year. Therefore, the sun shines very often. Here are the average sunshine hours per day.

Best Time

The best time to visit San Fernando is spring, in April and May, in fact, it is a mild to pleasantly warm and sunny period, and with a very low risk of hot days. Autumn, in October and November, is generally a good season as well, although the Santa Ana winds are quite common, and the first rains can fall, especially in November.

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San Fernando - Weather by month

Based on the period 1991-2020

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In January, the weather in San Fernando is usually mild. The average temperature is of 14.0 °C (57 °F), with a minimum of 7.8 °C (46.1 °F) and a maximum of 20.1 °C (68.2 °F).
On the coldest nights of the month, the temperature usually drops to around 2 °C (35.5 °F). However, it dropped to -3.3 °C (26.1 °F) in January 2007.
On the warmest days of the month, the temperature usually reaches around 27.5 °C (81.5 °F). However, it reached 33.3 °C (91.9 °F) in January 2003.
Precipitation amounts to 70 mm (2.8 in), distributed over 5 days.
The day lasts on average 10 hours and 10 minutes.
There are on average 7 hours of sunshine per day. So, the sun shines 71% of the time.
The average humidity is 51%.
The average wind speed is 10 kph (6 mph).

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In February, the weather in San Fernando is usually mild. The average temperature is of 14.1 °C (57 °F), with a minimum of 8 °C (46.4 °F) and a maximum of 20.2 °C (68.4 °F).
On the coldest nights of the month, the temperature usually drops to around 3 °C (37.5 °F). However, it dropped to -0.6 °C (30.9 °F) in February 2002.
On the warmest days of the month, the temperature usually reaches around 28 °C (82.5 °F). However, it reached 33.3 °C (91.9 °F) in February 2003.
Precipitation amounts to 95 mm (3.7 in), distributed over 6 days.
The day lasts on average 11 hours and 0 minutes.
There are on average 8 hours of sunshine per day. So, the sun shines 74% of the time.
The average humidity is 55%.
The average wind speed is 9 kph (6 mph).

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In March, the weather in San Fernando is usually very mild. The average temperature is of 15.9 °C (61 °F), with a minimum of 9.6 °C (49.2 °F) and a maximum of 22.3 °C (72.1 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 4.5 °C (40 °F). However, it dropped to 0 °C (32 °F) in March 2006.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 30 °C (86 °F). However, it reached 36.1 °C (97 °F) in March 2013.
Precipitation amounts to 65 mm (2.6 in), distributed over 5 days.
The day lasts on average 12 hours and 0 minutes.
There are on average 8.5 hours of sunshine per day. So, the sun shines 72% of the time.
The average humidity is 56%.
The average wind speed is 9 kph (6 mph).

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In April, the weather in San Fernando is usually very mild. However, there are remarkable differences between night and day. The average temperature is of 17.4 °C (63 °F), with a minimum of 10.8 °C (51.5 °F) and a maximum of 24.1 °C (75.3 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 6.5 °C (43.5 °F). However, it dropped to 2.2 °C (36 °F) in April 2011.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 33.5 °C (92.5 °F). However, it reached 38.3 °C (100.9 °F) in April 2004.
Precipitation amounts to 20 mm (0.8 in), distributed over 3 days.
The day lasts on average 13 hours and 5 minutes.
There are on average 10.5 hours of sunshine per day. So, the sun shines 79% of the time.
The average humidity is 53%.
The average wind speed is 10 kph (6 mph).

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In May, the weather in San Fernando is usually warm. The average temperature is of 19.7 °C (68 °F), with a minimum of 13.4 °C (56.1 °F) and a maximum of 26.1 °C (78.9 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 9.5 °C (49 °F). However, it dropped to 6.1 °C (43 °F) in May 1991.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 35 °C (95 °F). However, it reached 40.6 °C (105.1 °F) in May 2013.
Precipitation amounts to only 5 mm (0.2 in), distributed over 2 days.
The day lasts on average 14 hours and 0 minutes.
There are on average 10 hours of sunshine per day. So, the sun shines 72% of the time.
The average humidity is 57%.
The average wind speed is 9 kph (6 mph).

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In June, the weather in San Fernando is usually warm. However, there are remarkable differences between night and day. The average temperature is of 22.2 °C (72 °F), with a minimum of 15.4 °C (59.8 °F) and a maximum of 29 °C (84.2 °F).
On the coldest nights, which normally occur at the beginning of the month, the temperature usually drops to around 12.5 °C (54 °F). However, it dropped to 8.3 °C (46.9 °F) in June 1999.
On the warmest days, which normally occur at the end of the month, the temperature usually reaches around 37.5 °C (99 °F). However, it reached 45.6 °C (114.1 °F) in June 2016.
Precipitation amounts to only 0 mm (0 in), so on average it never rains in the whole month.
The day lasts on average 14 hours and 25 minutes. So the days are long. June 21, the summer solstice, is the longest day of the year in the Northern Hemisphere.
There are on average 11 hours of sunshine per day. So, the sun shines 77% of the time.
The average humidity is 58%.
The average wind speed is 9 kph (6 mph).

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In July, the weather in San Fernando is usually warm to hot. However, there are remarkable differences between night and day. The average temperature is of 25.4 °C (78 °F), with a minimum of 17.9 °C (64.3 °F) and a maximum of 32.9 °C (91.2 °F).
On the coldest nights of the month, the temperature usually drops to around 14.5 °C (58.5 °F). However, it dropped to 12.8 °C (55 °F) in July 2012.
On the warmest days of the month, the temperature usually reaches around 39.5 °C (103 °F). However, it reached 47.2 °C (117 °F) in July 2018.
Precipitation amounts to only 0 mm (0 in), so on average it never rains in the whole month.
The day lasts on average 14 hours and 10 minutes. So the days are long.
There are on average 12 hours of sunshine per day. So, the sun shines 85% of the time.
The average humidity is 53%.
The average wind speed is 9 kph (5 mph).

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In August, the hottest month of the year, the weather in San Fernando is usually warm to hot. However, there are remarkable differences between night and day. The average temperature is of 26.1 °C (79 °F), with a minimum of 18.3 °C (64.9 °F) and a maximum of 33.9 °C (93.1 °F).
On the coldest nights of the month, the temperature usually drops to around 15 °C (59 °F). However, it dropped to 13 °C (55.4 °F) in August 2010.
On the warmest days of the month, the temperature usually reaches around 40.5 °C (105 °F). However, it reached 44.4 °C (111.9 °F) in August 2020.
Precipitation amounts to only 0 mm (0 in), so on average it never rains in the whole month.
The day lasts on average 13 hours and 25 minutes.
There are on average 11.5 hours of sunshine per day. So, the sun shines 86% of the time.
The average humidity is 49%.
The average wind speed is 8 kph (5 mph).

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In September, the weather in San Fernando is usually warm to hot. However, there are remarkable differences between night and day. The average temperature is of 24.8 °C (77 °F), with a minimum of 17.1 °C (62.7 °F) and a maximum of 32.4 °C (90.4 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 13 °C (55 °F). However, it dropped to 10.6 °C (51.1 °F) in September 1998.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 40.5 °C (104.5 °F). However, it reached 47.8 °C (118 °F) in September 2020.
Precipitation amounts to only 5 mm (0.2 in), and all occurs in one day.
The day lasts on average 12 hours and 20 minutes.
There are on average 10 hours of sunshine per day. So, the sun shines 83% of the time.
The average humidity is 49%.
The average wind speed is 7 kph (4 mph).

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In October, the weather in San Fernando is usually warm. However, there are remarkable differences between night and day. The average temperature is of 21.0 °C (70 °F), with a minimum of 13.7 °C (56.6 °F) and a maximum of 28.3 °C (82.9 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 9.5 °C (49 °F). However, it dropped to 6 °C (42.8 °F) in October 1996.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 37 °C (98.5 °F). However, it reached 41.7 °C (107.1 °F) in October 2020.
Precipitation amounts to 10 mm (0.4 in), distributed over 2 days.
The day lasts on average 11 hours and 20 minutes.
There are on average 9 hours of sunshine per day. So, the sun shines 79% of the time.
The average humidity is 50%.
The average wind speed is 8 kph (5 mph).

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In November, the weather in San Fernando is usually very mild. However, there are remarkable differences between night and day. The average temperature is of 16.8 °C (62 °F), with a minimum of 9.6 °C (49.3 °F) and a maximum of 23.9 °C (75 °F).
On the coldest nights, which normally occur at the end of the month, the temperature usually drops to around 4.5 °C (40 °F). However, it dropped to -0.6 °C (30.9 °F) in November 2004.
On the warmest days, which normally occur at the beginning of the month, the temperature usually reaches around 32.5 °C (90 °F). However, it reached 40 °C (104 °F) in November 2019.
Precipitation amounts to 20 mm (0.8 in), distributed over 3 days.
The day lasts on average 10 hours and 25 minutes.
There are on average 7.5 hours of sunshine per day. So, the sun shines 72% of the time.
The average humidity is 47%.
The average wind speed is 9 kph (5 mph).

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In December, the coldest month of the year, the weather in San Fernando is usually mild. The average temperature is of 13.4 °C (56 °F), with a minimum of 7.2 °C (44.9 °F) and a maximum of 19.7 °C (67.4 °F).
On the coldest nights of the month, the temperature usually drops to around 1.5 °C (34.5 °F). However, it dropped to -2.2 °C (28 °F) in December 1998.
On the warmest days of the month, the temperature usually reaches around 27.5 °C (81.5 °F). However, it reached 31.1 °C (88 °F) in December 2003.
Precipitation amounts to 50 mm (2 in), distributed over 6 days.
The day lasts on average 9 hours and 55 minutes. December 21, the winter solstice, is the shortest day of the year in the Northern Hemisphere.
There are on average 7 hours of sunshine per day. So, the sun shines 73% of the time.
The average humidity is 49%.
The average wind speed is 10 kph (6 mph).