Alton weather in August
In August, Alton sees average daytime highs of 98°F and overnight lows near 78°F, with 1.6 in of rain across 6.8 wet days and about 12.9 hours of daylight. It is the 1st-warmest and 7th-wettest month of the year here.
Highs ease over the month, from about 99°F in the first days to 96°F by the end. The sky is clear or mostly clear about 48% of the time in August, and the air most often feels oppressive.
Daylight stretches from about 13 h 12 min at the start of August to 12 h 36 min by month's end. Set against the rest of the year, August is Alton's 5th-clearest and 6th-windiest month. For the whole year in context, see Alton's year-round climate.
- Daytime high
- 98°
- 1st warmest
- Overnight low
- 78°
- 12th coldest
- Rainfall
- 1.6 in
- 6.8 wet days
- Daylight
- 12 h 54 min
- 6:09 AM – 7:05 PM
- Cloud cover
- 47%
- 5th clearest
- Wind
- 10 mph
- 6th windiest
- Solar energy
- 6.42 kWh/m²
- Travel score
- 1.8
- out of 10
Alton is city in Texas, United States.
- Density
- 1,031/km²
- people per km²
- Founded
- 1978
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in August
Highs ease over the month, from about 99°F in the first days to 96°F by the end.
A typical August day in Alton reaches about 98°F in the afternoon and slips back to 78°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 92°F and 103°F. Set against its neighbours, August runs on par with July and about 5°F warmer than September.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 98 | 97 | 97 | 97 | 97 | 97 | 96 | 96 | 96 | 96 |
| Avg low (°F) | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 78 | 77 | 77 | 77 | 77 | 77 |
| Avg high (°F) | Avg low (°F) | |
|---|---|---|
| 1 | 99 | 78 |
| 2 | 99 | 78 |
| 3 | 99 | 78 |
| 4 | 99 | 78 |
| 5 | 99 | 78 |
| 6 | 99 | 78 |
| 7 | 99 | 78 |
| 8 | 99 | 78 |
| 9 | 99 | 78 |
| 10 | 99 | 78 |
| 11 | 99 | 78 |
| 12 | 99 | 78 |
| 13 | 99 | 78 |
| 14 | 98 | 78 |
| 15 | 98 | 78 |
| 16 | 98 | 78 |
| 17 | 98 | 78 |
| 18 | 98 | 78 |
| 19 | 98 | 78 |
| 20 | 98 | 78 |
| 21 | 98 | 78 |
| 22 | 98 | 78 |
| 23 | 97 | 78 |
| 24 | 97 | 78 |
| 25 | 97 | 78 |
| 26 | 97 | 78 |
| 27 | 97 | 77 |
| 28 | 96 | 77 |
| 29 | 96 | 77 |
| 30 | 96 | 77 |
| 31 | 96 | 77 |
How August really feels in Alton
Once humidity and wind are folded in, August averages 31 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 August is heat — humidity pushes the afternoon "feels like" well above the raw temperature.
Alton weather by month
How August compares with the rest of the year at a glance. August is the 1st-warmest and 7th-wettest month here — the current month is highlighted below.
| Month | High / Low (°F) | Rainfall (inches) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 72° / 52° | 1.0 | 4.4 | 10.5 | 7.5 |
| Feb | 76° / 56° | 0.9 | 4.4 | 11.1 | 7.7 |
| Mar | 82° / 62° | 1.4 | 5.2 | 11.8 | 6.8 |
| Apr | 88° / 68° | 1.7 | 5.3 | 12.6 | 5.0 |
| May | 92° / 73° | 2.2 | 6.6 | 13.3 | 3.5 |
| Jun | 96° / 77° | 2.0 | 7.1 | 13.6 | 2.4 |
| Jul | 98° / 78° | 2.1 | 5.8 | 13.5 | 2.0 |
| Aug | 98° / 78° | 1.6 | 6.8 | 12.9 | 1.8 |
| Sep | 93° / 75° | 3.5 | 11.8 | 12.2 | 3.1 |
| Oct | 87° / 68° | 2.3 | 6.7 | 11.4 | 5.2 |
| Nov | 79° / 60° | 1.4 | 5.3 | 10.7 | 7.5 |
| Dec | 73° / 54° | 1.2 | 5.1 | 10.4 | 7.6 |
Cloud cover in August
The sky is clear or mostly clear about 48% of the time in August.
Beyond those clear spells, partly cloudy skies cover about 19% of August, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to cloud over as the month goes on.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 72 | 72 | 72 | 71 | 71 | 71 | 71 | 70 | 70 | 70 | 69 | 69 | 69 | 68 | 68 | 67 | 67 | 68 | 67 | 67 | 67 | 66 | 66 | 65 | 64 | 63 | 62 | 61 | 60 | 59 | 58 |
| Cloudier (%) | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 30 | 30 | 30 | 31 | 31 | 31 | 32 | 32 | 33 | 33 | 32 | 33 | 33 | 33 | 34 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 72 | 28 |
| 2 | 72 | 28 |
| 3 | 72 | 28 |
| 4 | 71 | 29 |
| 5 | 71 | 29 |
| 6 | 71 | 29 |
| 7 | 71 | 29 |
| 8 | 70 | 30 |
| 9 | 70 | 30 |
| 10 | 70 | 30 |
| 11 | 69 | 31 |
| 12 | 69 | 31 |
| 13 | 69 | 31 |
| 14 | 68 | 32 |
| 15 | 68 | 32 |
| 16 | 67 | 33 |
| 17 | 67 | 33 |
| 18 | 68 | 32 |
| 19 | 67 | 33 |
| 20 | 67 | 33 |
| 21 | 67 | 33 |
| 22 | 66 | 34 |
| 23 | 66 | 34 |
| 24 | 65 | 35 |
| 25 | 64 | 36 |
| 26 | 63 | 37 |
| 27 | 62 | 38 |
| 28 | 61 | 39 |
| 29 | 60 | 40 |
| 30 | 59 | 41 |
| 31 | 58 | 42 |
Chance of precipitation in August
Alton gets around 1.6 in of rain over 6.8 wet days in August. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 23% and peaks near 37% on the wettest days. The odds climb toward the end of the month.
| 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 15 | 15 | 16 | 16 | 16 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 19 | 19 | 20 | 21 | 21 | 22 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 30 | 32 | 33 | 35 | 36 | 37 |
| Rain chance (%) | |
|---|---|
| 1 | 15 |
| 2 | 15 |
| 3 | 16 |
| 4 | 16 |
| 5 | 16 |
| 6 | 17 |
| 7 | 17 |
| 8 | 17 |
| 9 | 17 |
| 10 | 18 |
| 11 | 18 |
| 12 | 18 |
| 13 | 19 |
| 14 | 19 |
| 15 | 20 |
| 16 | 21 |
| 17 | 21 |
| 18 | 22 |
| 19 | 22 |
| 20 | 23 |
| 21 | 24 |
| 22 | 25 |
| 23 | 26 |
| 24 | 27 |
| 25 | 28 |
| 26 | 30 |
| 27 | 32 |
| 28 | 33 |
| 29 | 35 |
| 30 | 36 |
| 31 | 37 |
Humidity in August
Most of August feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the oppressive band about 83% of days. Sticky, muggy-or-worse air turns up on roughly 99% 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Humid (%) | 0 | 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 | 2 |
| Muggy (%) | 6 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 7 | 8 | 8 | 8 | 9 | 9 | 9 |
| Oppressive (%) | 85 | 86 | 86 | 86 | 85 | 86 | 86 | 86 | 87 | 86 | 86 | 86 | 86 | 86 | 86 | 85 | 85 | 84 | 84 | 83 | 82 | 82 | 80 | 80 | 79 | 77 | 77 | 76 | 74 | 74 | 72 |
| Miserable (%) | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 9 | 10 | 10 | 10 | 11 | 11 | 12 | 12 | 13 | 14 | 14 | 15 | 16 | 16 | 17 |
| Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|
| 1 | 0 | 6 | 85 | 9 |
| 2 | 0 | 5 | 86 | 9 |
| 3 | 0 | 5 | 86 | 9 |
| 4 | 0 | 5 | 86 | 9 |
| 5 | 0 | 5 | 85 | 10 |
| 6 | 0 | 4 | 86 | 10 |
| 7 | 0 | 4 | 86 | 10 |
| 8 | 0 | 4 | 86 | 10 |
| 9 | 0 | 4 | 87 | 9 |
| 10 | 1 | 4 | 86 | 9 |
| 11 | 1 | 4 | 86 | 9 |
| 12 | 1 | 4 | 86 | 9 |
| 13 | 1 | 4 | 86 | 9 |
| 14 | 1 | 4 | 86 | 9 |
| 15 | 1 | 4 | 86 | 9 |
| 16 | 1 | 5 | 85 | 9 |
| 17 | 1 | 5 | 85 | 9 |
| 18 | 1 | 5 | 84 | 10 |
| 19 | 1 | 5 | 84 | 10 |
| 20 | 1 | 6 | 83 | 10 |
| 21 | 1 | 6 | 82 | 11 |
| 22 | 1 | 6 | 82 | 11 |
| 23 | 1 | 7 | 80 | 12 |
| 24 | 1 | 7 | 80 | 12 |
| 25 | 1 | 7 | 79 | 13 |
| 26 | 1 | 8 | 77 | 14 |
| 27 | 1 | 8 | 77 | 14 |
| 28 | 1 | 8 | 76 | 15 |
| 29 | 1 | 9 | 74 | 16 |
| 30 | 1 | 9 | 74 | 16 |
| 31 | 2 | 9 | 72 | 17 |
Wind in August
Winds average 10 mph in August.
Across August, daily wind ranges from about 9 mph on the calmest days to 11 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (mph) | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 9 | 9 | 9 | 9 |
| 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 | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze | light breeze |
| Wind speed (mph) | Feels | |
|---|---|---|
| 1 | 11 | light breeze |
| 2 | 11 | light breeze |
| 3 | 11 | light breeze |
| 4 | 11 | light breeze |
| 5 | 11 | light breeze |
| 6 | 11 | light breeze |
| 7 | 11 | light breeze |
| 8 | 11 | light breeze |
| 9 | 11 | light breeze |
| 10 | 11 | light breeze |
| 11 | 11 | light breeze |
| 12 | 11 | light breeze |
| 13 | 11 | light breeze |
| 14 | 11 | light breeze |
| 15 | 11 | light breeze |
| 16 | 11 | light breeze |
| 17 | 11 | light breeze |
| 18 | 10 | light breeze |
| 19 | 10 | light breeze |
| 20 | 10 | light breeze |
| 21 | 10 | light breeze |
| 22 | 10 | light breeze |
| 23 | 10 | light breeze |
| 24 | 10 | light breeze |
| 25 | 10 | light breeze |
| 26 | 9 | light breeze |
| 27 | 9 | light breeze |
| 28 | 9 | light breeze |
| 29 | 9 | light breeze |
| 30 | 9 | light breeze |
| 31 | 9 | light breeze |
Sunrise & sunset in August
Daylight runs from about 13 h 12 min at the start of August to 12 h 36 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 36 minutes over August. Sunrise moves from 6:02 AM to 6:16 AM, and sunset from 7:17 PM to 6:50 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 13.2 | 13.2 | 13.2 | 13.2 | 13.2 | 13.2 | 13.1 | 13.1 | 13.1 | 13.1 | 13.0 | 13.0 | 13.0 | 13.0 | 13.0 | 12.9 | 12.9 | 12.9 | 12.9 | 12.8 | 12.8 | 12.8 | 12.8 | 12.7 | 12.7 | 12.7 | 12.7 | 12.6 | 12.6 | 12.6 | 12.6 |
| Sunrise (AM) | 6:02 | 6:02 | 6:03 | 6:03 | 6:04 | 6:04 | 6:05 | 6:05 | 6:06 | 6:06 | 6:07 | 6:07 | 6:08 | 6:08 | 6:09 | 6:09 | 6:10 | 6:10 | 6:11 | 6:11 | 6:12 | 6:12 | 6:13 | 6:13 | 6:14 | 6:14 | 6:14 | 6:15 | 6:15 | 6:16 | 6:16 |
| Sunset (PM) | 7:17 | 7:16 | 7:15 | 7:15 | 7:14 | 7:13 | 7:13 | 7:12 | 7:11 | 7:10 | 7:10 | 7:09 | 7:08 | 7:07 | 7:06 | 7:05 | 7:04 | 7:04 | 7:03 | 7:02 | 7:01 | 7:00 | 6:59 | 6:58 | 6:57 | 6:56 | 6:55 | 6:54 | 6:53 | 6:51 | 6:50 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 13.2 | 6:02 | 7:17 |
| 2 | 13.2 | 6:02 | 7:16 |
| 3 | 13.2 | 6:03 | 7:15 |
| 4 | 13.2 | 6:03 | 7:15 |
| 5 | 13.2 | 6:04 | 7:14 |
| 6 | 13.2 | 6:04 | 7:13 |
| 7 | 13.1 | 6:05 | 7:13 |
| 8 | 13.1 | 6:05 | 7:12 |
| 9 | 13.1 | 6:06 | 7:11 |
| 10 | 13.1 | 6:06 | 7:10 |
| 11 | 13.0 | 6:07 | 7:10 |
| 12 | 13.0 | 6:07 | 7:09 |
| 13 | 13.0 | 6:08 | 7:08 |
| 14 | 13.0 | 6:08 | 7:07 |
| 15 | 13.0 | 6:09 | 7:06 |
| 16 | 12.9 | 6:09 | 7:05 |
| 17 | 12.9 | 6:10 | 7:04 |
| 18 | 12.9 | 6:10 | 7:04 |
| 19 | 12.9 | 6:11 | 7:03 |
| 20 | 12.8 | 6:11 | 7:02 |
| 21 | 12.8 | 6:12 | 7:01 |
| 22 | 12.8 | 6:12 | 7:00 |
| 23 | 12.8 | 6:13 | 6:59 |
| 24 | 12.7 | 6:13 | 6:58 |
| 25 | 12.7 | 6:14 | 6:57 |
| 26 | 12.7 | 6:14 | 6:56 |
| 27 | 12.7 | 6:14 | 6:55 |
| 28 | 12.6 | 6:15 | 6:54 |
| 29 | 12.6 | 6:15 | 6:53 |
| 30 | 12.6 | 6:16 | 6:51 |
| 31 | 12.6 | 6:16 | 6:50 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 6.42 kWh/m².
For context, solar energy here swings from a low near 3.06 kWh/m² to a high of 6.78 kWh/m² in July across the year — August's 6.42 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.8 | 6.8 | 6.8 | 6.8 | 6.7 | 6.7 | 6.7 | 6.7 | 6.7 | 6.6 | 6.6 | 6.6 | 6.5 | 6.5 | 6.5 | 6.5 | 6.4 | 6.4 | 6.3 | 6.3 | 6.3 | 6.2 | 6.2 | 6.1 | 6.1 | 6.0 | 6.0 | 5.9 | 5.9 | 5.8 | 5.8 |
| 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 | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.8 | Intense |
| 2 | 6.8 | Intense |
| 3 | 6.8 | Intense |
| 4 | 6.8 | Intense |
| 5 | 6.7 | Intense |
| 6 | 6.7 | Intense |
| 7 | 6.7 | Intense |
| 8 | 6.7 | Intense |
| 9 | 6.7 | Intense |
| 10 | 6.6 | Intense |
| 11 | 6.6 | Intense |
| 12 | 6.6 | Intense |
| 13 | 6.5 | Intense |
| 14 | 6.5 | Intense |
| 15 | 6.5 | Intense |
| 16 | 6.5 | Intense |
| 17 | 6.4 | Intense |
| 18 | 6.4 | Intense |
| 19 | 6.3 | Intense |
| 20 | 6.3 | Intense |
| 21 | 6.3 | Intense |
| 22 | 6.2 | Intense |
| 23 | 6.2 | Intense |
| 24 | 6.1 | Intense |
| 25 | 6.1 | Intense |
| 26 | 6.0 | Intense |
| 27 | 6.0 | Bright |
| 28 | 5.9 | Bright |
| 29 | 5.9 | Bright |
| 30 | 5.8 | Bright |
| 31 | 5.8 | Bright |
Is August a good time to visit Alton?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is a weaker month for outdoor sightseeing in Alton.
What to pack for Alton in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Alton sees daytime highs around 98°F and nights near 78°F. Pack light clothes and sun protection. About 7 days see rain.
UV index in Alton in August
Clear-sky midday UV in August peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Alton peaks around June 20 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 22 at about 5 (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) | 5 | 7 | 8 | 11 | 9 | 12 | 11 | 11 | 10 | 8 | 6 | 5 |
| Level | Moderate | High | Very high | Extreme | Very high | Extreme | Extreme | Extreme | Very high | Very high | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 5 | Moderate |
| Feb | 7 | High |
| Mar | 8 | Very high |
| Apr | 11 | Extreme |
| May | 9 | Very high |
| Jun | 12 | Extreme |
| Jul | 11 | Extreme |
| Aug | 11 | Extreme |
| Sep | 10 | Very high |
| Oct | 8 | Very high |
| Nov | 6 | High |
| Dec | 5 | Moderate |
Air quality in Alton in August
Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.
Air quality in Alton is worst in July — around 26 µg/m³ PM2.5 (moderate), about 3.5× the cleanest month (November, 7 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) | 9 | 10 | 11 | 13 | 20 | 21 | 26 | 19 | 12 | 8 | 7 | 9 |
| Level | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 9 | Good |
| Feb | 10 | Good |
| Mar | 11 | Good |
| Apr | 13 | Moderate |
| May | 20 | Moderate |
| Jun | 21 | Moderate |
| Jul | 26 | Moderate |
| Aug | 19 | Moderate |
| Sep | 12 | Moderate |
| Oct | 8 | Good |
| Nov | 7 | Good |
| Dec | 9 | Good |
Where is Alton?
Alton sits at 26.3°N, 98.3°W, 161 ft above sea level, in United States. The nearest listed city is Mission, 5.0 mi away.
Topography around Alton
How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Alton.
Within 2 miles, the terrain around Alton has only modest variations in elevation — a maximum elevation change of 59 ft around an average of 164 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 203 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,024 ft.
The land around Alton is covered by trees (31%), grassland (25%) and artificial surfaces (20%) within 2 miles, trees (29%), cropland (25%) and grassland (21%) within 10 miles, and cropland (31%), grassland (26%) and shrubs (20%) 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 Alton (26.2873°, -98.3133°, elevation 161 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).