Weather forecast April 5, 2023 - P4

Climate and Average Weather Year Round in San Marcos California, United States

In San Marcos, the summers are short, warm, arid, and clear and the winters are long, cool, and partly cloudy. Over the course of the year, the temperature typically varies from 45°F to 81°F and is rarely below 39°F or above 88°F.

Based on the tourism score, the best time of year to visit San Marcos for warm-weather activities is from early June to early October.

Average Temperature in San Marcos 

The warm season lasts for 2.9 months, from July 1 to September 28, with an average daily high temperature above 77°F. The hottest month of the year in San Marcos is August, with an average high of 80°F and low of 65°F.

The cool season lasts for 4.3 months, from November 27 to April 6, with an average daily high temperature below 67°F. The coldest month of the year in San Marcos is December, with an average low of 46°F and high of 64°F.

Rainfall 

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. San Marcos experiences significant seasonal variation in monthly rainfall.

The rainy period of the year lasts for 6.3 months, from October 18 to April 26, with a sliding 31-day rainfall of at least 0.5 inches. The month with the most rain in San Marcos is February, with an average rainfall of 2.7 inches.

The rainless period of the year lasts for 5.7 months, from April 26 to October 18. The month with the least rain in San Marcos is June, with an average rainfall of 0.1 inches.

Weather forecast April 5, 2023

Weather 92078

High temperature : 56°F

Low temperature : 51°F

- Overcast clouds, Wind speed 9.22 mph, wind out of the W. Visibility 7 mi, humidity 61% . Chance of Rain : 0 % .

Today's Air Quality - Weather 92078 : Moderate

- Air Quality Index : CO : 263.69 ; NH3 : 1.09 ; NO : 0.75 ; NO2 : 6 ; O3 : 98.71 ; PM10 : 5.52 ; PM2.5 : 4.36 ; SO2 : 1.39

Weather 92079

High temperature : 56°F

Low temperature : 52°F

- Overcast clouds, Wind speed 9.22 mph, wind out of the W. Visibility 7 mi, humidity 60% . Chance of Rain : 0 % .

Today's Air Quality - Weather 92079 : Moderate

- Air Quality Index : CO : 263.69 ; NH3 : 1.09 ; NO : 0.75 ; NO2 : 6 ; O3 : 98.71 ; PM10 : 5.52 ; PM2.5 : 4.36 ; SO2 : 1.39

Weather 92081

High temperature : 56°F

Low temperature : 52°F

- Overcast clouds, Wind speed 9.22 mph, wind out of the W. Visibility 7 mi, humidity 61% . Chance of Rain : 0 % .

Today's Air Quality - Weather 92081 : Poor

- Air Quality Index : CO : 230.31 ; NH3 : 0.5 ; NO : 0.16 ; NO2 : 1.46 ; O3 : 103 ; PM10 : 2.76 ; PM2.5 : 1.98 ; SO2 : 0.71

Weather 92082

High temperature : 53°F

Low temperature : 48°F

- Overcast clouds, Wind speed 3 mph, wind out of the W. Visibility 7 mi, humidity 58% . Chance of Rain : 5 % .

Today's Air Quality - Weather 92082 : Poor

- Air Quality Index : CO : 253.68 ; NH3 : 0.78 ; NO : 0.23 ; NO2 : 2.44 ; O3 : 121.59 ; PM10 : 9.26 ; PM2.5 : 7.67 ; SO2 : 2

Weather 22015

High temperature : 65°F

Low temperature : 61°F

- Overcast clouds, Wind speed 11.01 mph, wind out of the SW. Visibility 7 mi, humidity 85% . Chance of Rain : 100 % .

Today's Air Quality - Weather 22015 : Moderate

- Air Quality Index : CO : 213.62 ; NH3 : 0.44 ; NO : 0 ; NO2 : 1.71 ; O3 : 85.12 ; PM10 : 3.07 ; PM2.5 : 1.69 ; SO2 : 0.75

Weather 92084

High temperature : 56°F

Low temperature : 52°F

- Overcast clouds, Wind speed 12.66 mph, wind out of the WSW. Visibility 7 mi, humidity 60% . Chance of Rain : 0 % .

Today's Air Quality - Weather 92084 : Poor

- Air Quality Index : CO : 233.65 ; NH3 : 0.59 ; NO : 0.17 ; NO2 : 1.69 ; O3 : 108.72 ; PM10 : 5.13 ; PM2.5 : 3.92 ; SO2 : 1.1

Weather 92085

High temperature : 57°F

Low temperature : 52°F

- Overcast clouds, Wind speed 12.66 mph, wind out of the WSW. Visibility 7 mi, humidity 60% . Chance of Rain : 0 % .

Today's Air Quality - Weather 92085 : Poor

- Air Quality Index : CO : 230.31 ; NH3 : 0.5 ; NO : 0.16 ; NO2 : 1.46 ; O3 : 103 ; PM10 : 2.76 ; PM2.5 : 1.98 ; SO2 : 0.71

Weather 92086

High temperature : 48°F

Low temperature : 42°F

- Overcast clouds, Wind speed 5.23 mph, wind out of the W. Visibility 7 mi, humidity 72% . Chance of Rain : 0 % .

Today's Air Quality - Weather 92086 : Poor

- Air Quality Index : CO : 240.33 ; NH3 : 0.6 ; NO : 0.21 ; NO2 : 2.14 ; O3 : 117.3 ; PM10 : 16.27 ; PM2.5 : 14.85 ; SO2 : 1.65

Weather 80922

High temperature : 26°F

Low temperature : 19°F

- Overcast clouds, Wind speed 14.97 mph, wind out of the N. Visibility 7 mi, humidity 77% . Chance of Rain : 75 % .

Today's Air Quality - Weather 80922 : Moderate

- Air Quality Index : CO : 203.61 ; NH3 : 0.51 ; NO : 0.08 ; NO2 : 3.81 ; O3 : 90.84 ; PM10 : 0.58 ; PM2.5 : 0.51 ; SO2 : 1.45

Weather 92090

High temperature : 57°F

Low temperature : 52°F

- Overcast clouds, Wind speed 12.66 mph, wind out of the WNW. Visibility 7 mi, humidity 55% . Chance of Rain : 0 % .

Today's Air Quality - Weather 92090 : Poor

- Air Quality Index : CO : 290.39 ; NH3 : 1.24 ; NO : 1.51 ; NO2 : 12.17 ; O3 : 100.14 ; PM10 : 7.79 ; PM2.5 : 6.18 ; SO2 : 3.01