San Bernardino, CA weather and climate in 2025
Day
35 °C
Night
17 °C
Sea
20 °C
Precipitation
3 mm
in month
Rainy days
1 days
in month
Daylight
14 hours
average
Sunshine
11 hours
average
Humidity
57 %
Day
35 °C
Night
17 °C
Sea
20 °C
Precipitation
3 mm
in month
Rainy days
1 days
in month
Daylight
14 hours
average
Sunshine
11 hours
average
Humidity
57 %
Overview: San Bernardino, CA
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Weather overview for San Bernardino, CA
Weather overview
San Bernardino, CA (United States of America) is a place with a tropical climate. Temperatures during the day are in the range from 19 °C (67 °F) in December to 35 °C (96 °F) in August. The highest night temperatures could be experienced in August with 17 °C (63 °F), the lowest in December with 5 °C (42 °F). The least rainy month in San Bernardino, CA is June with its 1 day of rain, the rainiest month is February, when it rains 6 days.
January weather
The number of rainy days rises similarly to the previous month, its value is 6 days in San Bernardino, CA, and the rainfall amount continues to rise too, with its value being 68 mm (2.68 in). The minimum of the wind speed is observable, with its value of 3.
February weather
The maximum of the number of rainy days is observable, the value of this measure is 6 days in San Bernardino, CA, and the maximum of the rainfall amount is observable too, with its value being 75 mm (2.94 in). The night temperature rise's start could be observed, with its value of 6 °C (44 °F), and the day temperature starts to rise as well, with its value being 20 °C (69 °F). The number of sun hours (without clouds) starts to rise, with its value being 8 hours.
March weather
The rainfall amount descent's start could be observed, its value is 52 mm (2.04 in) in San Bernardino, CA. The rise of the night temperature can be observed, the value of this measure is 8 °C (46 °F), and the day temperature continues to rise too. The rise of the number of sun hours (without clouds) can be observed, with its value of 9 hours.
April weather
The day temperature continues to rise in San Bernardino, CA, and the night temperature continues to rise as well, with its value of 10 °C (50 °F). The tourist season is about to start. The rainfall amount continues to descent, with its value of 25 mm (0.97 in), while the beginning of the descent of the number of rainy days could be noticed, with its value of 3 days. The rise of the number of sun hours (without clouds) can be observed, the value of this measure is 10 hours.
May weather
The rise of the day temperature can be observed, its value is 27 °C (81 °F) in San Bernardino, CA, and the rise of the night temperature can be observed as well, its value is 12 °C (54 °F). There is pending tourist season, and the dry season continues as well. The descent of the number of rainy days can be observed, with its value of 2 days, and the rainfall amount descents similarly to the previous month too, the value of this measure is 8 mm (0.32 in).
June weather
There is pending tourist season this month in San Bernardino, CA. The day temperature continues to rise, with its value of 31 °C (88 °F). The number of rainy days reaches its minimum, with its value being 1 day, and the rainfall amount reaches its minimum as well in June. The number of sun hours (without clouds) starts to rise in this month. The maximum of the day length can be noticed, its value is 14 hours.
July weather
There is pending tourist season in San Bernardino, CA, and the dry season continues as well. The rise of the day temperature can be observed, its value is 35 °C (95 °F), and the night temperature continues to rise as well, with its value of 17 °C (62 °F). The number of sun hours (without clouds) reaches its maximum, with its value being 11 hours.
August weather
The ongoing tourist season is noticeable in San Bernardino, CA, and the dry season continues as well. The maximum of the night temperature is observable, with its value of 17 °C (63 °F), and the maximum of the day temperature can be noticed as well in August. The number of sun hours (without clouds) descent's start could be observed, the value of this measure is 11 hours.
September weather
The tourist season continues in San Bernardino, CA, and the dry season continues as well. The day temperature descent's start could be observed, with its value of 33 °C (91 °F), and the night temperature starts to descent as well, with its value being 16 °C (60 °F). The descent of the number of sun hours (without clouds) can be observed, the value of this measure is 10 hours.
October weather
The tourist season is close to its peak in San Bernardino, CA. The day temperature continues to descent, the value of this measure is 28 °C (83 °F), and the night temperature continues to descent too. The rainfall amount rise's start could be observed, the value of this measure is 14 mm (0.53 in), and the number of rainy days starts to rise too, the value of this measure is 2 days. The descent of the number of sun hours (without clouds) can be observed, with its value being 9 hours.
November weather
The rise of the number of rainy days can be observed, its value is 4 days in San Bernardino, CA, and the rainfall amount rises similarly to the previous month too, with its value of 30 mm (1.16 in). The descent of the day temperature can be observed, the value of this measure is 23 °C (74 °F), and the night temperature continues to descent too, its value is 8 °C (47 °F). The number of sun hours (without clouds) continues to descent, with its value being 7 hours.
December weather
The day temperature reaches its minimum, its value is 19 °C (67 °F) in San Bernardino, CA, and the night temperature reaches its minimum too, with its value of 5 °C (42 °F). The rainfall amount continues to rise, the value of this measure is 48 mm (1.90 in), and the rise of the number of rainy days can be observed as well, with its value of 5 days. The number of sun hours (without clouds) is on its minimum in December. The maximum of the humidity can be noticed, with its value of 61 %.
FAQs
What level of humidity is to expect in February in San Bernardino, CA?
Humidity in San Bernardino, CA in February is 60 %.
How windy is San Bernardino, CA in March?
An average wind scale that can be expected in March in San Bernardino, CA is 3.
Is there a dry season in April in San Bernardino, CA?
Yes, there is a dry season in San Bernardino, CA in April with just 3 days during the month being rainy.
How many days of precipitation on average can I expect in May in San Bernardino, CA?
In San Bernardino, CA in May, we can expect 2 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 0.4 days of the week, or in general - 6 % days.
Are there good conditions to visit in June in San Bernardino, CA?
June is one of the best months to visit San Bernardino, CA. The daily temperatures in this month reach pleasant 31 °C (88 °F). You can expect just 1 day of rain during the month, taking an umbrella is not necessary. A sea temperature of 18 °C (65 °F) can seem colder to some, but others will call it refreshing. The temperature of 15 °C (58 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
What is the sea temperature in July in San Bernardino, CA?
The sea will reach 20 °C (68 °F) in July in San Bernardino, CA. At this sea temperature, swimming probably won't be the best experience. You probably won't like to stay in water for a long time. On the other hand, there are a minority of people who seek these conditions. This indicator is higher by 2 °C (35 °F) than in the previous month.
What is the temperature in San Bernardino, CA during the day in August?
In August in San Bernardino, CA, the average daily temperatures will be 35 °C (96 °F). High temperature, when staying in other than air-conditioned rooms or water can be uncomfortable. Be sure to bring sunscreen, very light clothing, and strictly look for rooms with air conditioning.
Is it hot in San Bernardino, CA in September?
Yes, it is hot in San Bernardino, CA in September, although the perception of heat can be subjective. Daytime temperatures rise to 33 °C (91 °F).
Is there a wet season in San Bernardino, CA in October?
No, there is no wet season in October in San Bernardino, CA - you can expect 2 days of rain during the month.
How many hours of sun to expect in November in San Bernardino, CA?
In November in San Bernardino, CA, you can expect around 7 hours of sunshine. In absolute terms, the decrease compared to the last month is 1 hour. This is 14 % decrease of the indicator.
What is the air temperature in San Bernardino, CA in December at night?
The average night temperature in December in San Bernardino, CA is 5 °C (42 °F). The nights will be cool, layers of clothes will be needed for evening and morning walks, the hotel should be equipped with heating. In absolute terms, the decrease compared to the last month is 3 °C (37 °F).
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