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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, in San Marcos, Texas, is a moderate winter month, with an average temperature ranging between max 59.9°F (15.5°C) and min 42.8°F (6°C). San Marcos witnesses the coldest weather in January, with temperatures averaging a high of 59.9°F (15.5°C) and a low of 42.8°F (6°C). Weather in January »
Weather in February
February, the last month of the winter in San Marcos, is an enjoyable month, with an average temperature ranging between max 63.7°F (17.6°C) and min 46.9°F (8.3°C). San Marcos's shift from January to February is accompanied by an average high-temperature of a comfortable 63.7°F (17.6°C), a slight deviation from 59.9°F (15.5°C). Weather in February »
Weather in March
March, the first month of the spring in San Marcos, is an agreeable month, with an average temperature fluctuating between 70.9°F (21.6°C) and 53.1°F (11.7°C). San Marcos's transition into March sees a mild rise in the average high-temperature, edging from a refreshing 63.7°F (17.6°C) in February to an agreeable 70.9°F (21.6°C). Weather in March »
Weather in April
April in San Marcos, Texas, is a moderately hot spring month, with temperature in the range of an average high of 77.5°F (25.3°C) and an average low of 58.6°F (14.8°C). The beginning of April signals a minor rise in the average high-temperature, moving from an agreeable 70.9°F (21.6°C) in March to a moderately hot 77.5°F (25.3°C). Weather in April »
Weather in May
May, the last month of the spring in San Marcos, is another warm month, with an average temperature fluctuating between 65.8°F (18.8°C) and 83.8°F (28.8°C). San Marcos's transition into May sees a mild rise in the average high-temperature, edging from 77.5°F (25.3°C) in April to a still moderately hot 83.8°F (28.8°C). Weather in May »
Weather in June
The first month of the summer, June, is a tropical month in San Marcos, Texas, with an average temperature varying between 90.7°F (32.6°C) and 72°F (22.2°C). San Marcos's transition into June sees a mild rise in the average high-temperature, edging from a warm 83.8°F (28.8°C) in May to a hot 90.7°F (32.6°C). Weather in June »
Weather in July
July, the same as June, in San Marcos, Texas, is a hot summer month, with an average temperature ranging between max 94.3°F (34.6°C) and min 73.8°F (23.2°C). July's arrival shows an average high-temperature of a still hot 94.3°F (34.6°C), hardly different from the previous month. Weather in July »
Weather in August
The last month of the summer, August, is a very hot month in San Marcos, Texas, with temperature in the range of an average low of 74.7°F (23.7°C) and an average high of 95.9°F (35.5°C). In San Marcos, August is identified by the highest average temperatures, reaching a peak of 95.9°F (35.5°C) and a low of 74.7°F (23.7°C). The heat index value during August is appraised at a burning hot 118.4°F (48°C). Weather in August »
Weather in September
September, the first month of the autumn in San Marcos, is still a tropical month, with an average temperature ranging between max 88°F (31.1°C) and min 70.5°F (21.4°C). In San Marcos, entering September brings a subtle temperature decrement, reducing from August's very hot 95.9°F (35.5°C) to a tropical 88°F (31.1°C). Weather in September »
Weather in October
October, like September, in San Marcos, Texas, is another warm autumn month, with temperature in the range of an average high of 79°F (26.1°C) and an average low of 61°F (16.1°C). San Marcos's weather changes with the onset of October, slightly falling from a tropical 88°F (31.1°C) in September to a moderately hot 79°F (26.1°C). Weather in October »
Weather in November
The last month of the autumn, November, is another pleasant month in San Marcos, Texas, with an average temperature ranging between max 68.2°F (20.1°C) and min 51.8°F (11°C). In San Marcos, entering November brings a temperature decrement, reducing from October's warm 79°F (26.1°C) to an agreeable 68.2°F (20.1°C). Weather in November »
Weather in December
December, the first month of the winter in San Marcos, is still a mild month, with an average temperature ranging between max 60.4°F (15.8°C) and min 45.5°F (7.5°C). The advent of December brings a subtle shift in temperature, with the average high moving from a pleasant 68.2°F (20.1°C) in November to a mild 60.4°F (15.8°C). Weather in December »
Updated: Aug 6, 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
What are the coldest months?
January proves to be the coldest month, recording an average maximum temperature of 59.9°F (15.5°C) and a minimum temperature of 42.8°F (6°C).
How many days does it rain?
In San Marcos, during the entire year, the rain falls for 151.8 days and collects up to 26.89" (683mm) of precipitation.
When does it snow?
Months with snowfall are January, February and December.
When does it snow the most?
The months with the most snowfall are January and February, with an average 0.12" (3mm) of accumulated snow.
How many days does it snow?
Throughout the year, there are 0.7 snowfall days, and 0.28" (7mm) of snow is accumulated.
What is the driest month?
February is the month with the least rainfall. Rain falls for 11.3 days and accumulates 1.1" (28mm) of precipitation.
When it does not snow?
March through November are months without snowfall.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from CST to CDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from CDT to CST.
What is the most humid month?
May is the most humid month, with an average relative humidity of 77%.
What is the rainiest month?
The month with the most rainfall is May, when the rain falls for 16.6 days and typically aggregates up to 4.57" (116mm) of precipitation.
When are the longest days?
The month with the longest days is June, with an average of 14h and 0min of daylight.
What is the month with the highest UV index?
The months with the highest UV index are June through August, with an average maximum UV index of 7.
What is the month with the most sunshine?
July and August, with an average of 10h of sunshine, are months with the most sunshine.
What time of the year is the hottest?
The month of August sees the average highest temperatures, reaching 95.9°F (35.5°C) at the peak and 74.7°F (23.7°C) at the low.
What is the least humid month?
With an average relative humidity of 62%, August is the least humid month.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 10h and 18min of daylight.
What is the month with the least sunshine?
The month with the least sunshine is December, with an average of 5.2h of sunshine.
When is the lowest UV index?
The month with the lowest UV index is December, with an average maximum UV index of 3.
Average temperature
San Marcos, TX
The warmest month (with the highest average high temperature) is August (95.9°F).
The month with the lowest average high temperature is January (59.9°F).
The month with the highest average low temperature is August (74.7°F).
The coldest month (with the lowest average low temperature) is January (42.8°F).
Average pressure
San Marcos, TX
- Average pressure in January:
30.15"Hg - Average pressure in February:
30.08"Hg - Average pressure in March:
30.02"Hg - Average pressure in April:
29.93"Hg - Average pressure in May:
29.91"Hg - Average pressure in June:
29.9"Hg
- Average pressure in July:
29.95"Hg - Average pressure in August:
29.93"Hg - Average pressure in September:
29.95"Hg - Average pressure in October:
30"Hg - Average pressure in November:
30.1"Hg - Average pressure in December:
30.11"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed
San Marcos, TX
- Average wind speed in January:
8.4mph - Average wind speed in February:
9.1mph - Average wind speed in March:
9mph - Average wind speed in April:
8.8mph - Average wind speed in May:
8.6mph - Average wind speed in June:
7.5mph
- Average wind speed in July:
7.3mph - Average wind speed in August:
6.9mph - Average wind speed in September:
6.1mph - Average wind speed in October:
7.3mph - Average wind speed in November:
7.9mph - Average wind speed in December:
8.1mph
The windiest month (with the highest average wind speed) is February (9.1mph).
The calmest month (with the lowest average wind speed) is September (6.1mph).
Average humidity
San Marcos, TX
The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is August (62%).
Average rainfall
San Marcos, TX
- Average rainfall in January:
1.38" - Average rainfall in February:
1.1" - Average rainfall in March:
1.93" - Average rainfall in April:
2.05" - Average rainfall in May:
4.57" - Average rainfall in June:
2.48"
- Average rainfall in July:
1.65" - Average rainfall in August:
2.05" - Average rainfall in September:
3.62" - Average rainfall in October:
3.11" - Average rainfall in November:
1.38" - Average rainfall in December:
1.57"
The wettest month (with the highest rainfall) is May (4.57").
The driest month (with the least rainfall) is February (1.1").
Average rainfall days
San Marcos, TX
- Average rainfall days in January:
9.4 days - Average rainfall days in February:
11.3 days - Average rainfall days in March:
14.4 days - Average rainfall days in April:
14.9 days - Average rainfall days in May:
16.6 days - Average rainfall days in June:
14.2 days
- Average rainfall days in July:
11.3 days - Average rainfall days in August:
10.9 days - Average rainfall days in September:
15.5 days - Average rainfall days in October:
10.6 days - Average rainfall days in November:
11 days - Average rainfall days in December:
11.7 days
The month with the highest number of rainy days is May (16.6 days).
The month with the least rainy days is January (9.4 days).
Average snowfall
San Marcos, TX
The months with the highest snowfall are January and February (0.12").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days
San Marcos, TX
- Average snowfall days in January:
0.3 days - Average snowfall days in February:
0.3 days - Average snowfall days in March:
0 days - Average snowfall days in April:
0 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0 days - Average snowfall days in November:
0 days - Average snowfall days in December:
0.1 days
The months with the highest number of snowfall days are January and February (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight / Average sunshine
San Marcos, TX
- Average daylight in January:
10h and 3min - Average daylight in February:
11h and 1min - Average daylight in March:
12h and 0min - Average daylight in April:
12h and 5min - Average daylight in May:
13h and 4min - Average daylight in June:
14h and 0min
- Average daylight in July:
13h and 5min - Average daylight in August:
13h and 1min - Average daylight in September:
12h and 2min - Average daylight in October:
11h and 2min - Average daylight in November:
10h and 4min - Average daylight in December:
10h and 2min
The month with the longest days is June (Average daylight: 14h and 0min).
The month with the shortest days is December (Average daylight: 10h and 18min).
- Average sunshine in January:
6h and 1min - Average sunshine in February:
6h and 4min - Average sunshine in March:
6h and 2min - Average sunshine in April:
7h and 2min - Average sunshine in May:
7h and 4min - Average sunshine in June:
9h and 0min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
10h and 0min - Average sunshine in September:
8h and 2min - Average sunshine in October:
6h and 5min - Average sunshine in November:
5h and 2min - Average sunshine in December:
5h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days
San Marcos, TX
- Average sunshine days in January:
19.4 days - Average sunshine days in February:
15.4 days - Average sunshine days in March:
14.2 days - Average sunshine days in April:
13.1 days - Average sunshine days in May:
11.9 days - Average sunshine days in June:
13.1 days
- Average sunshine days in July:
17.7 days - Average sunshine days in August:
18.4 days - Average sunshine days in September:
12.4 days - Average sunshine days in October:
17.6 days - Average sunshine days in November:
17.2 days - Average sunshine days in December:
17.1 days
The month with the most sunshine days is January (19.4 days).
The month with the least sunshine days is May (11.9 days).
Average UV index
San Marcos, TX
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is December (UV index 3).
Average cloud cover
San Marcos, TX
The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility
San Marcos, TX
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
San Marcos, Texas, USA
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