Climate and monthly weather forecastSan Ramon, CA
Climate and monthly weather forecast
Weather in January
January, the same as December, in San Ramon, California, is a moderate winter month, with an average temperature fluctuating between 42.3°F (5.7°C) and 57°F (13.9°C). January ushers in an average high-temperature of a still refreshing 57°F (13.9°C), aligning closely with the preceding month. Weather in January »Weather in February
The last month of the winter, February, is another refreshing month in San Ramon, California, with an average temperature ranging between min 42.4°F (5.8°C) and max 59.7°F (15.4°C). With February's advent, San Ramon sees an average high-temperature of a still mild 59.7°F (15.4°C), subtly shifted from January's 57°F (13.9°C). Weather in February »Weather in March
March, the first month of the spring in San Ramon, is an enjoyable month, with an average temperature ranging between max 62.8°F (17.1°C) and min 43.5°F (6.4°C). The arrival of March coincides with an average high-temperature of a comfortable 62.8°F (17.1°C), indicating a minimal shift from February's 59.7°F (15.4°C). Weather in March »Weather in April
April, the same as March, is another enjoyable spring month in San Ramon, California, with temperature in the range of an average high of 67.6°F (19.8°C) and an average low of 45.3°F (7.4°C). In the transition from March to April, San Ramon reports an average high-temperature of a still refreshing 67.6°F (19.8°C), indicating a close resemblance to the prior month. Weather in April »Weather in May
The last month of the spring, May, is a pleasant month in San Ramon, California, with an average temperature varying between 72.5°F (22.5°C) and 48.7°F (9.3°C). San Ramon marks the start of May with an average high-temperature of an agreeable 72.5°F (22.5°C), hinting at a slight fluctuation from April's 67.6°F (19.8°C). Weather in May »Weather in June
The first month of the summer, June, is a warm month in San Ramon, California, with an average temperature fluctuating between 53.2°F (11.8°C) and 80.2°F (26.8°C). As San Ramon enters June, the average high-temperature marginally increases from the an agreeable 72.5°F (22.5°C) of May to a warm 80.2°F (26.8°C). Weather in June »Weather in July
July, the same as June, is a moderately hot summer month in San Ramon, California, with temperature in the range of an average high of 83.7°F (28.7°C) and an average low of 55°F (12.8°C). In San Ramon, the peak average temperatures are observed in July, with a high of 83.7°F (28.7°C) and a low of 55°F (12.8°C). For July, the heat index is estimated at a tropical 86°F (30°C). Weather in July »Weather in August
The last month of the summer, August, is another warm month in San Ramon, California, with an average temperature ranging between max 83.3°F (28.5°C) and min 55.9°F (13.3°C). San Ramon in August witnesses an average high-temperature of a still moderately hot 83.3°F (28.5°C), indicating a slight variation from July's 83.7°F (28.7°C). Weather in August »Weather in September
The first month of the autumn, September, is still a warm month in San Ramon, California, with temperature in the range of an average low of 56.5°F (13.6°C) and an average high of 82°F (27.8°C). San Ramon observes an average high-temperature of a still warm 82°F (27.8°C) in September, barely different from 83.3°F (28.5°C) in August. Weather in September »Weather in October
October, like September, in San Ramon, California, is another warm autumn month, with an average temperature ranging between max 74.3°F (23.5°C) and min 53.4°F (11.9°C). The transition into October subtly indicates a reduction in the average high-temperature, down to a still warm 74.3°F (23.5°C) from September's moderately hot 82°F (27.8°C). Weather in October »Weather in November
November, the last month of the autumn in San Ramon, is also an enjoyable month, with an average temperature ranging between min 46.8°F (8.2°C) and max 64°F (17.8°C). During the transition into November, San Ramon observes a decrease in the average high-temperature, falling from a warm 74.3°F (23.5°C) in October to an enjoyable 64°F (17.8°C). Weather in November »Weather in December
The first month of the winter, December, is also a moderate month in San Ramon, California, with temperature in the range of an average high of 55.9°F (13.3°C) and an average low of 42.1°F (5.6°C). San Ramon records the coldest temperatures in December, averaging a high of 55.9°F (13.3°C) and a low of 42.1°F (5.6°C). 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
Throughout the year, there are 67.2 rainfall days, and 10.98" (279mm) of precipitation is accumulated.
The months with the lowest UV index in San Ramon are January, February, November and December, with an average maximum UV index of 3.
February is the month with the most rainfall. Rain falls for 8.3 days and accumulates 2.28" (58mm) of precipitation.
March is the most humid month in San Ramon, with an average relative humidity of 74%.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in San Ramon, 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 has the longest days of the year in San Ramon, with an average of 14h and 42min of daylight.
The months with the highest UV index in San Ramon, California, are June through August, with an average maximum UV index of 6.
July is the warmest month, with the temperature often reaching an average high of 83.7°F (28.7°C) and an average low of 55°F (12.8°C).
July is the only month when rain does not fall.
July has the most sunshine of the year in San Ramon, California, with an average of 12.1h of sunshine.
January through June, August through December are months with rainfall in San Ramon.
With an average relative humidity of 57%, September is the least humid month.
The month of December, characterized by an average high of 55.9°F (13.3°C) and a low of 42.1°F (5.6°C), is recognized as the coldest in San Ramon.
With an average of 9h and 36min of daylight, December has the shortest days of the year in San Ramon, California.
The month with the least sunshine in San Ramon is December, with an average of 5.8h of sunshine.
Average temperature
San Ramon, CA
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is December (55.9°F).
The month with the highest average low temperature is September (56.5°F).
The coldest month (with the lowest average low temperature) is December (42.1°F).
Average pressure
San Ramon, CA
- Average pressure in January:
30.14"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.07"Hg - Average pressure in April:
30.03"Hg - Average pressure in May:
29.98"Hg - Average pressure in June:
29.92"Hg
- Average pressure in July:
29.93"Hg - Average pressure in August:
29.92"Hg - Average pressure in September:
29.92"Hg - Average pressure in October:
29.98"Hg - Average pressure in November:
30.07"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed
San Ramon, CA
- Average wind speed in January:
4.4mph - Average wind speed in February:
5.3mph - Average wind speed in March:
5.6mph - Average wind speed in April:
6.1mph - Average wind speed in May:
6.7mph - Average wind speed in June:
6.5mph
- Average wind speed in July:
6.1mph - Average wind speed in August:
5.8mph - Average wind speed in September:
5.2mph - Average wind speed in October:
4.6mph - Average wind speed in November:
4.2mph - Average wind speed in December:
4.7mph
The windiest month (with the highest average wind speed) is May (6.7mph).
The calmest month (with the lowest average wind speed) is November (4.2mph).
Average humidity
San Ramon, CA
The month with the highest relative humidity is March (74%).
The month with the lowest relative humidity is September (57%).
Average rainfall
San Ramon, CA
- Average rainfall in January:
1.89" - Average rainfall in February:
2.28" - Average rainfall in March:
1.81" - Average rainfall in April:
0.67" - Average rainfall in May:
0.55" - Average rainfall in June:
0.08"
The wettest month (with the highest rainfall) is February (2.28").
The driest month (with the least rainfall) is July (0").
Average rainfall days
San Ramon, CA
- Average rainfall days in January:
9.1 days - Average rainfall days in February:
8.3 days - Average rainfall days in March:
12.6 days - Average rainfall days in April:
6.9 days - Average rainfall days in May:
4.6 days - Average rainfall days in June:
1.5 days
- Average rainfall days in July:
0.9 days - Average rainfall days in August:
0.6 days - Average rainfall days in September:
1.8 days - Average rainfall days in October:
4.3 days - Average rainfall days in November:
6.6 days - Average rainfall days in December:
10 days
The month with the highest number of rainy days is March (12.6 days).
The month with the least rainy days is August (0.6 days).
Average daylight / Average sunshine
San Ramon, CA
- Average daylight in January:
9h and 54min - Average daylight in February:
10h and 48min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 12min - Average daylight in May:
14h and 12min - Average daylight in June:
14h and 42min
- Average daylight in July:
14h and 30min - Average daylight in August:
13h and 36min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 12min - Average daylight in November:
10h and 6min - Average daylight in December:
9h and 36min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in January:
6h and 6min - Average sunshine in February:
6h and 6min - Average sunshine in March:
7h and 48min - Average sunshine in April:
10h and 18min - Average sunshine in May:
10h and 54min - Average sunshine in June:
11h and 42min
- Average sunshine in July:
12h and 6min - Average sunshine in August:
11h and 54min - Average sunshine in September:
11h and 12min - Average sunshine in October:
7h and 6min - Average sunshine in November:
6h and 36min - Average sunshine in December:
5h and 48min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days
San Ramon, CA
- Average sunshine days in January:
21 days - Average sunshine days in February:
19.2 days - Average sunshine days in March:
17.5 days - Average sunshine days in April:
22.4 days - Average sunshine days in May:
25.7 days - Average sunshine days in June:
28.3 days
- Average sunshine days in July:
29.9 days - Average sunshine days in August:
29.8 days - Average sunshine days in September:
27.5 days - Average sunshine days in October:
25.6 days - Average sunshine days in November:
22.4 days - Average sunshine days in December:
20.5 days
The month with the most sunshine days is July (29.9 days).
The month with the least sunshine days is March (17.5 days).
Average UV index
San Ramon, CA
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover
San Ramon, CA
The month with the most cloud cover is March (Cloud cover 36).
The month with the least cloud cover is July (Cloud cover 6).
Average visibility
San Ramon, 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).
