Climate and monthly weather forecastLake San Marcos, CA
Climate and monthly weather forecast
Weather in January
January, like December, in Lake San Marcos, California, is another refreshing winter month, with an average temperature fluctuating between 48.7°F (9.3°C) and 64.9°F (18.3°C). January reports an average high-temperature of a still enjoyable 64.9°F (18.3°C), slightly varied from December's 63.3°F (17.4°C). Weather in January »Weather in February
February, the last month of the winter in Lake San Marcos, is another comfortable month, with an average temperature fluctuating between 48°F (8.9°C) and 63.3°F (17.4°C). February and December mark Lake San Marcos's lowest temperatures, averaging a high-temperature of 63.3°F (17.4°C). Weather in February »Weather in March
March, the first month of the spring in Lake San Marcos, is still a comfortable month, with an average temperature varying between 65.8°F (18.8°C) and 49.5°F (9.7°C). The initiation of March records an average high-temperature of a still comfortable 65.8°F (18.8°C), displaying a near consistency with the previous month. Weather in March »Weather in April
April in Lake San Marcos, California, is a pleasant spring month, with an average temperature ranging between max 68.5°F (20.3°C) and min 51.3°F (10.7°C). April's presence records an average high-temperature of an agreeable 68.5°F (20.3°C), closely mirroring March's climate. Weather in April »Weather in May
May, the last month of the spring in Lake San Marcos, is another pleasant month, with an average temperature ranging between max 70.3°F (21.3°C) and min 53.6°F (12°C). May observes an average high-temperature of a still pleasant 70.3°F (21.3°C), marking an insignificant difference from April's 68.5°F (20.3°C). Weather in May »Weather in June
June, the first month of the summer in Lake San Marcos, is a moderately hot month, with an average temperature ranging between min 56.5°F (13.6°C) and max 75.2°F (24°C). The dawn of June sees an average high-temperature of a warm 75.2°F (24°C), subtly contrasting with May's 70.3°F (21.3°C). Weather in June »Weather in July
July, the same as June, is another warm summer month in Lake San Marcos, California, with an average temperature fluctuating between 80.2°F (26.8°C) and 62.6°F (17°C). The arrival of July marks a slight shift to an average high-temperature of a still moderately hot 80.2°F (26.8°C) from June's 75.2°F (24°C). Weather in July »Weather in August
The last month of the summer, August, is also a moderately hot month in Lake San Marcos, California, with an average temperature fluctuating between 64.2°F (17.9°C) and 81.9°F (27.7°C). August, with its high-temperature average of 81.9°F (27.7°C) and a low-temperature average of 64.2°F (17.9°C), is the warmest month. The heat index in August is calculated to be 84.2°F (29°C). Weather in August »Weather in September
The first month of the autumn, September, is also a moderately hot month in Lake San Marcos, California, with an average temperature fluctuating between 80.8°F (27.1°C) and 63.3°F (17.4°C). The arrival of September marks a slight shift to an average high-temperature of a still warm 80.8°F (27.1°C) from August's 81.9°F (27.7°C). Weather in September »Weather in October
October, like September, in Lake San Marcos, California, is a moderately hot autumn month, with an average temperature fluctuating between 58.8°F (14.9°C) and 75.4°F (24.1°C). The move into October indicates a slight reduction in the average high-temperature, down from September's warm 80.8°F (27.1°C) to a still moderately hot 75.4°F (24.1°C). Weather in October »Weather in November
November, the last month of the autumn in Lake San Marcos, is also an agreeable month, with temperature in the range of an average high of 69.4°F (20.8°C) and an average low of 54°F (12.2°C). November marks a gentle change in average high-temperature, declining from October's warm 75.4°F (24.1°C) to an agreeable 69.4°F (20.8°C). Weather in November »Weather in December
The first month of the winter, December, is still a comfortable month in Lake San Marcos, California, with an average temperature varying between 63.3°F (17.4°C) and 48.2°F (9°C). Lake San Marcos's coldest season falls during February and December, averaging a high-temperature of 63.3°F (17.4°C). Weather in December »Updated: Feb 10, 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 Lake San Marcos, during the entire year, the rain falls for 52.1 days and collects up to 6.1" (155mm) of precipitation.
The months with the lowest UV index in Lake San Marcos, California, are January through March, November and December, with an average maximum UV index of 4.
February and December are identified as the coldest months in Lake San Marcos, California, with an average high-temperature of 63.3°F (17.4°C).
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 70%, May is the most humid month in Lake San Marcos, California.
The month with the least rainfall in Lake San Marcos, California, is June, when the rain falls for 1.2 days and typically collects 0.08" (2mm) of precipitation.
June has the longest days of the year in Lake San Marcos, with an average of 14h and 18min of daylight.
June through September, with an average maximum UV index of 6, are months with the highest UV index in Lake San Marcos, California.
July has the most sunshine of the year, with an average of 12.1h of sunshine.
August temperatures in Lake San Marcos tend to peak at an average high of 81.9°F (27.7°C) and dip to a low of 64.2°F (17.9°C).
The least humid month is November, with an average relative humidity of 56%.
The month with the most rainfall is December, when the rain falls for 5.9 days and typically aggregates up to 1.22" (31mm) of precipitation.
The month with the shortest days in Lake San Marcos, California, is December, with an average of 10h and 0min of daylight.
With an average of 6.8h of sunshine, December has the least sunshine of the year in Lake San Marcos, California.
Average temperature
Lake San Marcos, CA
The warmest month (with the highest average high temperature) is August (81.9°F).
The months with the lowest average high temperature are February and December (63.3°F).
The month with the highest average low temperature is August (64.2°F).
The coldest month (with the lowest average low temperature) is February (48°F).
Average pressure
Lake San Marcos, CA
- Average pressure in January:
30.09"Hg - Average pressure in February:
30.04"Hg - Average pressure in March:
30.01"Hg - Average pressure in April:
29.95"Hg - Average pressure in May:
29.91"Hg - Average pressure in June:
29.87"Hg
- Average pressure in July:
29.9"Hg - Average pressure in August:
29.88"Hg - Average pressure in September:
29.88"Hg - Average pressure in October:
29.93"Hg - Average pressure in November:
30.02"Hg - Average pressure in December:
30.06"Hg
The month with the highest atmospheric pressure is January (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed
Lake San Marcos, CA
- Average wind speed in January:
5mph - Average wind speed in February:
5.2mph - Average wind speed in March:
5.2mph - Average wind speed in April:
5.7mph - Average wind speed in May:
5.5mph - Average wind speed in June:
5mph
- Average wind speed in July:
4.8mph - Average wind speed in August:
4.7mph - Average wind speed in September:
4.5mph - Average wind speed in October:
4.4mph - Average wind speed in November:
4.8mph - Average wind speed in December:
5mph
The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is October (4.4mph).
Average humidity
Lake San Marcos, CA
The month with the highest relative humidity is May (70%).
The month with the lowest relative humidity is November (56%).
Average rainfall
Lake San Marcos, CA
- Average rainfall in January:
0.59" - Average rainfall in February:
1.18" - Average rainfall in March:
0.75" - Average rainfall in April:
0.59" - Average rainfall in May:
0.35" - Average rainfall in June:
0.08"
- Average rainfall in July:
0.12" - Average rainfall in August:
0.12" - Average rainfall in September:
0.16" - Average rainfall in October:
0.2" - Average rainfall in November:
0.75" - Average rainfall in December:
1.22"
The wettest month (with the highest rainfall) is December (1.22").
The driest month (with the least rainfall) is June (0.08").
Average rainfall days
Lake San Marcos, CA
- Average rainfall days in January:
5 days - Average rainfall days in February:
6.3 days - Average rainfall days in March:
7.8 days - Average rainfall days in April:
6.3 days - Average rainfall days in May:
4.8 days - Average rainfall days in June:
1.2 days
- Average rainfall days in July:
2.5 days - Average rainfall days in August:
1.6 days - Average rainfall days in September:
2.7 days - Average rainfall days in October:
3.5 days - Average rainfall days in November:
4.5 days - Average rainfall days in December:
5.9 days
The month with the highest number of rainy days is March (7.8 days).
The month with the least rainy days is June (1.2 days).
Average daylight / Average sunshine
Lake San Marcos, CA
- Average daylight in January:
10h and 18min - Average daylight in February:
11h and 0min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 0min - Average daylight in May:
13h and 54min - Average daylight in June:
14h and 18min
- Average daylight in July:
14h and 6min - Average daylight in August:
13h and 18min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 18min - Average daylight in November:
10h and 30min - Average daylight in December:
10h and 0min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in January:
6h and 54min - Average sunshine in February:
6h and 54min - Average sunshine in March:
8h and 42min - Average sunshine in April:
11h and 0min - Average sunshine in May:
11h and 12min - 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 24min - Average sunshine in October:
8h and 54min - Average sunshine in November:
7h and 12min - Average sunshine in December:
6h 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: 6h and 48min).
Average sunshine days
Lake San Marcos, CA
- Average sunshine days in January:
25 days - Average sunshine days in February:
20 days - Average sunshine days in March:
21.6 days - Average sunshine days in April:
21.8 days - Average sunshine days in May:
21.3 days - Average sunshine days in June:
22.8 days
- Average sunshine days in July:
24.5 days - Average sunshine days in August:
25.8 days - Average sunshine days in September:
25.3 days - Average sunshine days in October:
25 days - Average sunshine days in November:
23.4 days - Average sunshine days in December:
22.5 days
The month with the most sunshine days is August (25.8 days).
The month with the least sunshine days is February (20 days).
Average UV index
Lake San Marcos, 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, March, November and December (UV index 4).
Average cloud cover
Lake San Marcos, CA
The months with the most cloud cover are March and December (Cloud cover 23).
The month with the least cloud cover is August (Cloud cover 7).
Average visibility
Lake San Marcos, 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).
