San Marcos weather in June
In June, San Marcos sees average daytime highs of 90°F and overnight lows near 72°F, with 3.2 in of rain across 9.8 wet days and about 13.9 hours of daylight. It is the 3rd-warmest and 4th-wettest month of the year here.
Highs climb over the month, from about 89°F in the first days to 91°F by the end. The sky is clear or mostly clear about 42% of the time in June, and the air most often feels oppressive.
Daylight stretches from about 13 h 48 min at the start of June to 13 h 54 min by month's end. Set against the rest of the year, June is San Marcos's 5th-clearest and 8th-windiest month. For the whole year in context, see San Marcos's year-round climate.
- Daytime high
- 90°
- 3rd warmest
- Overnight low
- 72°
- 10th coldest
- Rainfall
- 3.2 in
- 9.8 wet days
- Daylight
- 13 h 54 min
- 5:35 AM – 7:29 PM
- Cloud cover
- 48%
- 5th clearest
- Wind
- 7 mph
- 8th windiest
- Solar energy
- 6.32 kWh/m²
- Travel score
- 3.9
- out of 10
San Marcos is city in and county seat of Hays County, Texas, United States, that extends into Caldwell and Guadalupe counties.
- Density
- 684/km²
- people per km²
- Founded
- 1808
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in June
Highs climb over the month, from about 89°F in the first days to 91°F by the end.
A typical June day in San Marcos reaches about 90°F in the afternoon and slips back to 72°F overnight — a 18°F spread between the day's warmth and the night's chill. On most days the high lands between 84°F and 97°F. Set against its neighbours, June runs about 6°F warmer than May and about 3°F cooler than July.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 88 | 89 | 89 | 89 | 89 | 89 | 89 | 90 | 90 | 90 | 90 | 90 | 90 | 90 | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 91 | 92 |
| Avg low (°F) | 70 | 70 | 71 | 71 | 71 | 71 | 71 | 71 | 72 | 72 | 72 | 72 | 72 | 72 | 72 | 73 | 73 | 73 | 73 | 73 | 73 | 73 | 73 | 73 | 73 | 73 | 73 | 73 | 73 | 73 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 88 | 70 |
| 2 | 89 | 70 |
| 3 | 89 | 71 |
| 4 | 89 | 71 |
| 5 | 89 | 71 |
| 6 | 89 | 71 |
| 7 | 89 | 71 |
| 8 | 90 | 71 |
| 9 | 90 | 72 |
| 10 | 90 | 72 |
| 11 | 90 | 72 |
| 12 | 90 | 72 |
| 13 | 90 | 72 |
| 14 | 90 | 72 |
| 15 | 91 | 72 |
| 16 | 91 | 73 |
| 17 | 91 | 73 |
| 18 | 91 | 73 |
| 19 | 91 | 73 |
| 20 | 91 | 73 |
| 21 | 91 | 73 |
| 22 | 91 | 73 |
| 23 | 91 | 73 |
| 24 | 91 | 73 |
| 25 | 91 | 73 |
| 26 | 91 | 73 |
| 27 | 91 | 73 |
| 28 | 91 | 73 |
| 29 | 91 | 73 |
| 30 | 92 | 73 |
How June really feels in San Marcos
Once humidity and wind are folded in, June averages 30 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.
The story in June is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
San Marcos weather by month
How June compares with the rest of the year at a glance. June is the 3rd-warmest and 4th-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 61° / 42° | 2.5 | 7.4 | 10.3 | 5.4 |
| Feb | 65° / 46° | 2.4 | 7.6 | 10.9 | 6.2 |
| Mar | 71° / 52° | 3.0 | 9.4 | 11.8 | 6.8 |
| Apr | 78° / 59° | 3.3 | 9 | 12.7 | 6.9 |
| May | 85° / 66° | 4.5 | 11.4 | 13.5 | 5.3 |
| Jun | 90° / 72° | 3.2 | 9.8 | 13.9 | 3.9 |
| Jul | 94° / 74° | 1.8 | 6.4 | 13.7 | 3.2 |
| Aug | 94° / 74° | 2.4 | 6.4 | 13.1 | 3.0 |
| Sep | 88° / 69° | 3.0 | 8.2 | 12.2 | 4.7 |
| Oct | 80° / 60° | 3.2 | 7.5 | 11.3 | 7.1 |
| Nov | 69° / 50° | 2.8 | 7 | 10.5 | 7.0 |
| Dec | 62° / 43° | 2.8 | 7.9 | 10.1 | 5.7 |
Cloud cover in June
The sky is clear or mostly clear about 42% of the time in June.
Beyond those clear spells, partly cloudy skies cover about 23% of June, with mostly cloudy or overcast conditions the remaining 34%.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 59 | 60 | 61 | 62 | 64 | 64 | 66 | 66 | 67 | 67 | 67 | 68 | 67 | 68 | 68 | 67 | 67 | 68 | 68 | 67 | 67 | 66 | 66 | 66 | 65 | 65 | 65 | 65 | 65 | 65 |
| Cloudier (%) | 41 | 40 | 39 | 38 | 36 | 36 | 34 | 34 | 33 | 33 | 33 | 32 | 33 | 32 | 32 | 33 | 33 | 32 | 32 | 33 | 33 | 34 | 34 | 34 | 35 | 35 | 35 | 35 | 35 | 35 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 59 | 41 |
| 2 | 60 | 40 |
| 3 | 61 | 39 |
| 4 | 62 | 38 |
| 5 | 64 | 36 |
| 6 | 64 | 36 |
| 7 | 66 | 34 |
| 8 | 66 | 34 |
| 9 | 67 | 33 |
| 10 | 67 | 33 |
| 11 | 67 | 33 |
| 12 | 68 | 32 |
| 13 | 67 | 33 |
| 14 | 68 | 32 |
| 15 | 68 | 32 |
| 16 | 67 | 33 |
| 17 | 67 | 33 |
| 18 | 68 | 32 |
| 19 | 68 | 32 |
| 20 | 67 | 33 |
| 21 | 67 | 33 |
| 22 | 66 | 34 |
| 23 | 66 | 34 |
| 24 | 66 | 34 |
| 25 | 65 | 35 |
| 26 | 65 | 35 |
| 27 | 65 | 35 |
| 28 | 65 | 35 |
| 29 | 65 | 35 |
| 30 | 65 | 35 |
Chance of precipitation in June
San Marcos gets around 3.2 in of rain over 9.8 wet days in June. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 33% and peaks near 35% on the wettest days.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 35 | 34 | 34 | 33 | 33 | 33 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 32 | 33 | 33 | 33 | 33 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 33 | 33 |
| Rain chance (%) | |
|---|---|
| 1 | 35 |
| 2 | 34 |
| 3 | 34 |
| 4 | 33 |
| 5 | 33 |
| 6 | 33 |
| 7 | 32 |
| 8 | 32 |
| 9 | 32 |
| 10 | 32 |
| 11 | 32 |
| 12 | 32 |
| 13 | 32 |
| 14 | 32 |
| 15 | 33 |
| 16 | 33 |
| 17 | 33 |
| 18 | 33 |
| 19 | 34 |
| 20 | 34 |
| 21 | 34 |
| 22 | 34 |
| 23 | 34 |
| 24 | 34 |
| 25 | 34 |
| 26 | 34 |
| 27 | 34 |
| 28 | 34 |
| 29 | 33 |
| 30 | 33 |
Humidity in June
Most of June feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, June lands in the oppressive band about 48% of days. Sticky, muggy-or-worse air turns up on roughly 88% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Dry (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Comfortable (%) | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Humid (%) | 12 | 11 | 11 | 10 | 10 | 10 | 9 | 9 | 9 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 6 |
| Muggy (%) | 53 | 53 | 51 | 50 | 48 | 47 | 46 | 45 | 44 | 43 | 43 | 42 | 41 | 40 | 40 | 39 | 38 | 37 | 37 | 36 | 35 | 35 | 34 | 34 | 33 | 33 | 33 | 32 | 32 | 32 |
| Oppressive (%) | 31 | 32 | 34 | 36 | 37 | 39 | 40 | 41 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 50 | 51 | 51 | 52 | 53 | 54 | 55 | 55 | 57 | 57 | 57 | 58 | 58 | 59 |
| Miserable (%) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|---|---|
| 1 | 1 | 3 | 12 | 53 | 31 | 0 |
| 2 | 1 | 3 | 11 | 53 | 32 | 0 |
| 3 | 1 | 3 | 11 | 51 | 34 | 0 |
| 4 | 1 | 3 | 10 | 50 | 36 | 0 |
| 5 | 1 | 3 | 10 | 48 | 37 | 0 |
| 6 | 1 | 3 | 10 | 47 | 39 | 0 |
| 7 | 1 | 3 | 9 | 46 | 40 | 0 |
| 8 | 1 | 3 | 9 | 45 | 41 | 0 |
| 9 | 1 | 3 | 9 | 44 | 43 | 1 |
| 10 | 1 | 3 | 8 | 43 | 44 | 1 |
| 11 | 1 | 3 | 8 | 43 | 45 | 1 |
| 12 | 1 | 3 | 8 | 42 | 46 | 1 |
| 13 | 1 | 3 | 8 | 41 | 47 | 1 |
| 14 | 1 | 2 | 8 | 40 | 48 | 1 |
| 15 | 1 | 2 | 8 | 40 | 49 | 1 |
| 16 | 1 | 2 | 8 | 39 | 50 | 1 |
| 17 | 1 | 2 | 8 | 38 | 50 | 1 |
| 18 | 1 | 2 | 8 | 37 | 51 | 1 |
| 19 | 1 | 2 | 8 | 37 | 51 | 1 |
| 20 | 1 | 2 | 8 | 36 | 52 | 1 |
| 21 | 1 | 2 | 8 | 35 | 53 | 1 |
| 22 | 1 | 1 | 8 | 35 | 54 | 1 |
| 23 | 1 | 1 | 8 | 34 | 55 | 1 |
| 24 | 1 | 1 | 8 | 34 | 55 | 1 |
| 25 | 1 | 1 | 7 | 33 | 57 | 1 |
| 26 | 1 | 1 | 7 | 33 | 57 | 1 |
| 27 | 1 | 1 | 7 | 33 | 57 | 1 |
| 28 | 1 | 1 | 7 | 32 | 58 | 1 |
| 29 | 1 | 1 | 7 | 32 | 58 | 1 |
| 30 | 1 | 1 | 6 | 32 | 59 | 1 |
Wind in June
Winds average 7 mph in June.
Across June, daily wind ranges from about 7 mph on the calmest days to 8 mph at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| Feels | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 8 | light breeze |
| 2 | 8 | light breeze |
| 3 | 8 | light breeze |
| 4 | 8 | light breeze |
| 5 | 8 | light breeze |
| 6 | 8 | light breeze |
| 7 | 8 | light breeze |
| 8 | 8 | light breeze |
| 9 | 8 | light breeze |
| 10 | 8 | light breeze |
| 11 | 8 | light breeze |
| 12 | 8 | light breeze |
| 13 | 8 | light breeze |
| 14 | 8 | light breeze |
| 15 | 8 | light breeze |
| 16 | 8 | light breeze |
| 17 | 8 | light breeze |
| 18 | 8 | light breeze |
| 19 | 7 | light breeze |
| 20 | 7 | light breeze |
| 21 | 7 | light breeze |
| 22 | 7 | calm |
| 23 | 7 | calm |
| 24 | 7 | calm |
| 25 | 7 | calm |
| 26 | 7 | calm |
| 27 | 7 | calm |
| 28 | 7 | calm |
| 29 | 7 | calm |
| 30 | 7 | calm |
Sunrise & sunset in June
Daylight runs from about 13 h 48 min at the start of June to 13 h 54 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 6 minutes over June. Sunrise moves from 5:36 AM to 5:38 AM, and sunset from 7:23 PM to 7:32 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.8 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 | 13.9 |
| Sunrise (AM) | 5:36 | 5:36 | 5:36 | 5:35 | 5:35 | 5:35 | 5:35 | 5:35 | 5:35 | 5:35 | 5:35 | 5:35 | 5:35 | 5:35 | 5:35 | 5:35 | 5:35 | 5:35 | 5:35 | 5:35 | 5:35 | 5:36 | 5:36 | 5:36 | 5:36 | 5:37 | 5:37 | 5:37 | 5:37 | 5:38 |
| Sunset (PM) | 7:23 | 7:23 | 7:24 | 7:24 | 7:25 | 7:25 | 7:26 | 7:26 | 7:27 | 7:27 | 7:27 | 7:28 | 7:28 | 7:29 | 7:29 | 7:29 | 7:30 | 7:30 | 7:30 | 7:30 | 7:31 | 7:31 | 7:31 | 7:31 | 7:32 | 7:32 | 7:32 | 7:32 | 7:32 | 7:32 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.8 | 5:36 | 7:23 |
| 2 | 13.8 | 5:36 | 7:23 |
| 3 | 13.8 | 5:36 | 7:24 |
| 4 | 13.8 | 5:35 | 7:24 |
| 5 | 13.8 | 5:35 | 7:25 |
| 6 | 13.8 | 5:35 | 7:25 |
| 7 | 13.8 | 5:35 | 7:26 |
| 8 | 13.9 | 5:35 | 7:26 |
| 9 | 13.9 | 5:35 | 7:27 |
| 10 | 13.9 | 5:35 | 7:27 |
| 11 | 13.9 | 5:35 | 7:27 |
| 12 | 13.9 | 5:35 | 7:28 |
| 13 | 13.9 | 5:35 | 7:28 |
| 14 | 13.9 | 5:35 | 7:29 |
| 15 | 13.9 | 5:35 | 7:29 |
| 16 | 13.9 | 5:35 | 7:29 |
| 17 | 13.9 | 5:35 | 7:30 |
| 18 | 13.9 | 5:35 | 7:30 |
| 19 | 13.9 | 5:35 | 7:30 |
| 20 | 13.9 | 5:35 | 7:30 |
| 21 | 13.9 | 5:35 | 7:31 |
| 22 | 13.9 | 5:36 | 7:31 |
| 23 | 13.9 | 5:36 | 7:31 |
| 24 | 13.9 | 5:36 | 7:31 |
| 25 | 13.9 | 5:36 | 7:32 |
| 26 | 13.9 | 5:37 | 7:32 |
| 27 | 13.9 | 5:37 | 7:32 |
| 28 | 13.9 | 5:37 | 7:32 |
| 29 | 13.9 | 5:37 | 7:32 |
| 30 | 13.9 | 5:38 | 7:32 |
Solar energy in June
Average shortwave solar energy reaching the ground each day in June, about 6.32 kWh/m².
For context, solar energy here swings from a low near 2.69 kWh/m² to a high of 6.69 kWh/m² in July across the year — June's 6.32 kWh/m² sits near the top of that range.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.1 | 6.1 | 6.2 | 6.2 | 6.2 | 6.2 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.4 | 6.4 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.1 | Intense |
| 2 | 6.1 | Intense |
| 3 | 6.2 | Intense |
| 4 | 6.2 | Intense |
| 5 | 6.2 | Intense |
| 6 | 6.2 | Intense |
| 7 | 6.3 | Intense |
| 8 | 6.3 | Intense |
| 9 | 6.3 | Intense |
| 10 | 6.3 | Intense |
| 11 | 6.3 | Intense |
| 12 | 6.3 | Intense |
| 13 | 6.3 | Intense |
| 14 | 6.3 | Intense |
| 15 | 6.3 | Intense |
| 16 | 6.3 | Intense |
| 17 | 6.3 | Intense |
| 18 | 6.3 | Intense |
| 19 | 6.3 | Intense |
| 20 | 6.3 | Intense |
| 21 | 6.3 | Intense |
| 22 | 6.3 | Intense |
| 23 | 6.3 | Intense |
| 24 | 6.3 | Intense |
| 25 | 6.3 | Intense |
| 26 | 6.3 | Intense |
| 27 | 6.3 | Intense |
| 28 | 6.3 | Intense |
| 29 | 6.4 | Intense |
| 30 | 6.4 | Intense |
Is June a good time to visit San Marcos?
Our two travel scores rate June for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
June is a weaker month for outdoor sightseeing in San Marcos. The water and warmth also suit a beach or pool day.
What to pack for San Marcos in June
From June's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In June, San Marcos sees daytime highs around 90°F and nights near 72°F. Pack light clothes and sun protection. Worth having: rain gear. About 10 days see rain.
UV index in San Marcos in June
Clear-sky midday UV in June peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in San Marcos peaks around August 11 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 4 (moderate).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 4 | 6 | 7 | 10 | 10 | 10 | 10 | 11 | 9 | 6 | 5 | 4 |
| Level | Moderate | High | High | Very high | Extreme | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 6 | High |
| Mar | 7 | High |
| Apr | 10 | Very high |
| May | 10 | Extreme |
| Jun | 10 | Extreme |
| Jul | 10 | Extreme |
| Aug | 11 | Extreme |
| Sep | 9 | Very high |
| Oct | 6 | High |
| Nov | 5 | Moderate |
| Dec | 4 | Moderate |
Air quality in San Marcos in June
Average fine-particle pollution (PM2.5) through the year — so you can see where June falls, not just the annual average.
Air quality in San Marcos is worst in July — around 17 µg/m³ PM2.5 (moderate), about 2.9× the cleanest month (December, 6 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 6 | 7 | 8 | 9 | 14 | 14 | 17 | 12 | 10 | 6 | 6 | 6 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Good | Good | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 6 | Good |
| Feb | 7 | Good |
| Mar | 8 | Good |
| Apr | 9 | Good |
| May | 14 | Moderate |
| Jun | 14 | Moderate |
| Jul | 17 | Moderate |
| Aug | 12 | Good |
| Sep | 10 | Good |
| Oct | 6 | Good |
| Nov | 6 | Good |
| Dec | 6 | Good |
Where is San Marcos?
San Marcos sits at 29.9°N, 97.9°W, 617 ft above sea level, in United States. The nearest listed city is Kyle, 8.1 mi away.
Topography around San Marcos
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of San Marcos.
Within 2 miles, the terrain around San Marcos has only modest variations in elevation — a maximum elevation change of 289 ft around an average of 643 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 751 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,814 ft.
The land around San Marcos is covered by trees (42%), artificial surfaces (31%) and grassland (23%) within 2 miles, trees (41%) and grassland (39%) within 10 miles, and trees (48%) and grassland (42%) within 50 miles.
United States travel facts
- Power plugs
- Type A / B
- 120 V · 60 Hz
- Prices
- ≈ 100% of US
- price level, 2025
- GDP per capita
- $90,027
- 2025
- Happiness
- 6.8 / 10
- World Happiness, 2025
- Safe drinking water
- 98%
- of population, 2024
- Homicide rate
- 5.8
- per 100k, 2023
- Road deaths
- 12.7
- per 100k/yr, 2019
- Income group
- High
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for San Marcos (29.8833°, -97.9414°, elevation 617 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).