Climate and monthly weather forecastSan Marino, CA
Climate and monthly weather forecast
Weather in January
January, the same as December, is another enjoyable winter month in San Marino, California, with an average temperature ranging between min 48.4°F (9.1°C) and max 65.1°F (18.4°C). San Marino's weather in January, with an average high-temperature of a still enjoyable 65.1°F (18.4°C), subtly shifts from December's 63.1°F (17.3°C). Weather in January »Weather in February
The last month of the winter, February, is another comfortable month in San Marino, California, with an average temperature fluctuating between 47.1°F (8.4°C) and 64.9°F (18.3°C). The onset of February notes an average high-temperature of a still refreshing 64.9°F (18.3°C), subtly shifted from January's 65.1°F (18.4°C). Weather in February »Weather in March
The first month of the spring, March, is a pleasant month in San Marino, California, with an average temperature ranging between min 48.7°F (9.3°C) and max 68°F (20°C). San Marino's March reports an average high-temperature of an agreeable 68°F (20°C), exhibiting a minor difference from February. Weather in March »Weather in April
April, like March, is an agreeable spring month in San Marino, California, with an average temperature ranging between min 51.4°F (10.8°C) and max 72.1°F (22.3°C). The shift into April finds San Marino at an average high-temperature of a still pleasant 72.1°F (22.3°C), closely comparable to March's conditions. Weather in April »Weather in May
May, the last month of the spring in San Marino, is a moderately hot month, with temperature in the range of an average high of 74.8°F (23.8°C) and an average low of 54.5°F (12.5°C). May's onset records an average high-temperature of a moderately hot 74.8°F (23.8°C), a near match to April's 72.1°F (22.3°C). Weather in May »Weather in June
June, the first month of the summer in San Marino, is also a moderately hot month, with an average temperature ranging between min 57.7°F (14.3°C) and max 80.2°F (26.8°C). As June arrives, San Marino's weather shows a minor increase in high-temperatures, edging from May's moderately hot 74.8°F (23.8°C) to a still 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 Marino, California, with temperature in the range of an average low of 63.3°F (17.4°C) and an average high of 85.5°F (29.7°C). San Marino records a slight change with July's average high-temperatures adjusting to a still moderately hot 85.5°F (29.7°C) from June's 80.2°F (26.8°C). Weather in July »Weather in August
August, the last month of the summer in San Marino, is a tropical month, with an average temperature ranging between min 64.8°F (18.2°C) and max 87.1°F (30.6°C). With an average high-temperature of 87.1°F (30.6°C) and an average low-temperature of 64.8°F (18.2°C), August is the warmest month. August's mean heat index is computed to be 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 San Marino, California, with an average temperature fluctuating between 63.5°F (17.5°C) and 84.7°F (29.3°C). September ushers in an average high-temperature of a moderately hot 84.7°F (29.3°C), aligning closely with the preceding month. Weather in September »Weather in October
October, the same as September, is another warm autumn month in San Marino, California, with an average temperature ranging between min 59.4°F (15.2°C) and max 78.1°F (25.6°C). A moderate decline in average high-temperatures is noted in October, moving from a warm 84.7°F (29.3°C) in September to a still moderately hot 78.1°F (25.6°C). Weather in October »Weather in November
The last month of the autumn, November, is also an agreeable month in San Marino, California, with temperature in the range of an average low of 53.1°F (11.7°C) and an average high of 70.9°F (21.6°C). The transition into November is accompanied by a slight temperature decrease, with the average high-temperature shifting from a warm 78.1°F (25.6°C) in October to an agreeable 70.9°F (21.6°C). Weather in November »Weather in December
The first month of the winter, December, is also an enjoyable month in San Marino, California, with an average temperature ranging between max 63.1°F (17.3°C) and min 47.5°F (8.6°C). December, with an average high of 63.1°F (17.3°C) and a low of 47.5°F (8.6°C), signifies the coldest month of the year. Weather in December »Updated: Jun 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 45 rainfall days, and 6.61" (168mm) of precipitation is accumulated.
January, February and December, with an average of 6.9h of sunshine, are months with the least sunshine in San Marino.
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 4.
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.
With an average relative humidity of 59%, June is the most humid month.
The month with the least rainfall is June, when the rain falls for 1.2 days and typically collects 0.04" (1mm) of precipitation.
June has the longest days of the year, with an average of 14h and 24min of daylight.
The months with the highest UV index in San Marino are June through September, with an average maximum UV index of 6.
July has the most sunshine of the year, with an average of 12.1h of sunshine.
The highest temperatures are recorded in August, with averages reaching a high of 87.1°F (30.6°C) and a low of 64.8°F (18.2°C).
With an average relative humidity of 47%, November is the least humid month.
December brings the lowest temperatures, with an average high of 63.1°F (17.3°C) and an average low of 47.5°F (8.6°C).
December is the month with the most rainfall in San Marino. Rain falls for 4.9 days and accumulates 1.34" (34mm) of precipitation.
The month with the shortest days is December, with an average of 9h and 54min of daylight.
Average temperature
San Marino, CA
The warmest month (with the highest average high temperature) is August (87.1°F).
The month with the lowest average high temperature is December (63.1°F).
The month with the highest average low temperature is August (64.8°F).
The coldest month (with the lowest average low temperature) is February (47.1°F).
Average pressure
San Marino, 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:
29.92"Hg - Average pressure in June:
29.88"Hg
- Average pressure in July:
29.91"Hg - Average pressure in August:
29.89"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:
30.08"Hg
The month with the highest atmospheric pressure is January (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed
San Marino, CA
- Average wind speed in January:
5.3mph - Average wind speed in February:
5mph - Average wind speed in March:
5.2mph - Average wind speed in April:
5.7mph - Average wind speed in May:
5.6mph - Average wind speed in June:
5.1mph
- Average wind speed in July:
4.8mph - Average wind speed in August:
4.5mph - Average wind speed in September:
4.4mph - Average wind speed in October:
4.5mph - Average wind speed in November:
4.9mph - Average wind speed in December:
5.2mph
The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is September (4.4mph).
Average humidity
San Marino, CA
The month with the highest relative humidity is June (59%).
The month with the lowest relative humidity is November (47%).
Average rainfall
San Marino, CA
- Average rainfall in January:
1.1" - Average rainfall in February:
1.3" - Average rainfall in March:
0.83" - Average rainfall in April:
0.51" - Average rainfall in May:
0.16" - Average rainfall in June:
0.04"
- Average rainfall in July:
0.24" - Average rainfall in August:
0.12" - Average rainfall in September:
0.16" - Average rainfall in October:
0.2" - Average rainfall in November:
0.63" - Average rainfall in December:
1.34"
The wettest month (with the highest rainfall) is December (1.34").
The driest month (with the least rainfall) is June (0.04").
Average rainfall days
San Marino, CA
- Average rainfall days in January:
4.9 days - Average rainfall days in February:
5.3 days - Average rainfall days in March:
5.8 days - Average rainfall days in April:
4.6 days - Average rainfall days in May:
3.4 days - Average rainfall days in June:
1.2 days
- Average rainfall days in July:
3.6 days - Average rainfall days in August:
2.3 days - Average rainfall days in September:
2.8 days - Average rainfall days in October:
2.6 days - Average rainfall days in November:
3.6 days - Average rainfall days in December:
4.9 days
The month with the highest number of rainy days is March (5.8 days).
The month with the least rainy days is June (1.2 days).
Average daylight / Average sunshine
San Marino, 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 54min - Average sunshine in February:
6h and 54min - Average sunshine in March:
9h and 0min - Average sunshine in April:
11h and 18min - Average sunshine in May:
11h and 42min - Average sunshine in June:
12h and 0min
- Average sunshine in July:
12h and 6min - Average sunshine in August:
12h and 0min - Average sunshine in September:
10h and 42min - Average sunshine in October:
8h and 36min - Average sunshine in November:
7h and 18min - Average sunshine in December:
6h and 54min
The month with the most sunshine is July (Average sunshine: 12h and 6min).
The months with the least sunshine are January, February and December (Average sunshine: 6h and 54min).
Average sunshine days
San Marino, CA
- Average sunshine days in January:
25.3 days - Average sunshine days in February:
22.3 days - Average sunshine days in March:
24.9 days - Average sunshine days in April:
24.8 days - Average sunshine days in May:
25.3 days - Average sunshine days in June:
27.1 days
- Average sunshine days in July:
24.8 days - Average sunshine days in August:
26.3 days - Average sunshine days in September:
25 days - Average sunshine days in October:
26.7 days - Average sunshine days in November:
25.6 days - Average sunshine days in December:
24.5 days
The month with the most sunshine days is June (27.1 days).
The month with the least sunshine days is February (22.3 days).
Average UV index
San Marino, CA
The months with the highest UV index are June, July, August and September (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 4).
Average cloud cover
San Marino, CA
The months with the most cloud cover are March and December (Cloud cover 21).
The month with the least cloud cover is August (Cloud cover 5).
Average visibility
San Marino, 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).
