Castaños weather in September
In September, Castaños sees average daytime highs of 28°C and overnight lows near 19°C, with 121 mm of rain across 13 wet days and about 12.2 hours of daylight. It is the 6th-warmest and 1st-wettest month of the year here.
Highs ease over the month, from about 30°C in the first days to 27°C by the end. The sky is clear or mostly clear about 43% of the time in September, and the air most often feels muggy.
Daylight stretches from about 12 h 36 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Castaños's 12th-clearest and 8th-windiest month. For the whole year in context, see Castaños's year-round climate.
- Daytime high
- 28°
- 6th warmest
- Overnight low
- 19°
- 8th coldest
- Rainfall
- 121 mm
- 13 wet days
- Daylight
- 12 h 12 min
- 6:35 AM – 6:45 PM
- Cloud cover
- 50%
- 12th clearest
- Wind
- 7 km/h
- 8th windiest
- Solar energy
- 5.34 kWh/m²
- Travel score
- 5.6
- out of 10
Castaños is municipal seat of Castaños, State of Coahuila, Mexico.
- Founded
- 1674
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Highs ease over the month, from about 30°C in the first days to 27°C by the end.
A typical September day in Castaños reaches about 28°C in the afternoon and slips back to 19°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 24°C and 33°C. Set against its neighbours, September runs about 3°C cooler than August and about 2°C warmer than October.
| 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 (°C) | 30 | 30 | 30 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 27 | 27 |
| Avg low (°C) | 21 | 21 | 21 | 21 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 20 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 30 | 21 |
| 2 | 30 | 21 |
| 3 | 30 | 21 |
| 4 | 30 | 21 |
| 5 | 30 | 20 |
| 6 | 29 | 20 |
| 7 | 29 | 20 |
| 8 | 29 | 20 |
| 9 | 29 | 20 |
| 10 | 29 | 20 |
| 11 | 29 | 20 |
| 12 | 29 | 20 |
| 13 | 29 | 20 |
| 14 | 28 | 20 |
| 15 | 28 | 19 |
| 16 | 28 | 19 |
| 17 | 28 | 19 |
| 18 | 28 | 19 |
| 19 | 28 | 19 |
| 20 | 28 | 19 |
| 21 | 28 | 19 |
| 22 | 28 | 19 |
| 23 | 28 | 18 |
| 24 | 28 | 18 |
| 25 | 28 | 18 |
| 26 | 28 | 18 |
| 27 | 28 | 18 |
| 28 | 28 | 18 |
| 29 | 27 | 18 |
| 30 | 27 | 18 |
How September really feels in Castaños
Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.
September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Castaños weather by month
How September compares with the rest of the year at a glance. September is the 6th-warmest and 1st-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 19° / 7° | 17 | 3.6 | 10.5 | 7.2 |
| Feb | 22° / 9° | 12 | 3.1 | 11.1 | 8.0 |
| Mar | 25° / 13° | 24 | 4.3 | 11.8 | 8.0 |
| Apr | 29° / 16° | 27 | 5.8 | 12.6 | 6.2 |
| May | 32° / 20° | 49 | 11.6 | 13.3 | 4.3 |
| Jun | 33° / 22° | 56 | 10.2 | 13.7 | 3.8 |
| Jul | 32° / 22° | 81 | 10.2 | 13.5 | 4.0 |
| Aug | 32° / 22° | 64 | 9.2 | 12.9 | 4.3 |
| Sep | 28° / 19° | 121 | 13 | 12.2 | 5.6 |
| Oct | 26° / 15° | 39 | 6.7 | 11.4 | 7.6 |
| Nov | 22° / 11° | 21 | 3.9 | 10.7 | 8.0 |
| Dec | 19° / 7° | 19 | 3.4 | 10.3 | 7.4 |
Cloud cover in September
The sky is clear or mostly clear about 43% of the time in September, the cloudiest month of the year.
Beyond those clear spells, partly cloudy skies cover about 20% of September, with mostly cloudy or overcast conditions the remaining 37%. Skies tend to open up 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 62 | 61 | 60 | 60 | 59 | 59 | 58 | 58 | 58 | 59 | 59 | 59 | 59 | 60 | 60 | 60 | 61 | 61 | 63 | 63 | 64 | 65 | 67 | 68 | 69 | 70 | 71 | 73 | 73 | 73 |
| Cloudier (%) | 38 | 39 | 40 | 40 | 41 | 41 | 42 | 42 | 42 | 41 | 41 | 41 | 41 | 40 | 40 | 40 | 39 | 39 | 37 | 37 | 36 | 35 | 33 | 32 | 31 | 30 | 29 | 27 | 27 | 27 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 62 | 38 |
| 2 | 61 | 39 |
| 3 | 60 | 40 |
| 4 | 60 | 40 |
| 5 | 59 | 41 |
| 6 | 59 | 41 |
| 7 | 58 | 42 |
| 8 | 58 | 42 |
| 9 | 58 | 42 |
| 10 | 59 | 41 |
| 11 | 59 | 41 |
| 12 | 59 | 41 |
| 13 | 59 | 41 |
| 14 | 60 | 40 |
| 15 | 60 | 40 |
| 16 | 60 | 40 |
| 17 | 61 | 39 |
| 18 | 61 | 39 |
| 19 | 63 | 37 |
| 20 | 63 | 37 |
| 21 | 64 | 36 |
| 22 | 65 | 35 |
| 23 | 67 | 33 |
| 24 | 68 | 32 |
| 25 | 69 | 31 |
| 26 | 70 | 30 |
| 27 | 71 | 29 |
| 28 | 73 | 27 |
| 29 | 73 | 27 |
| 30 | 73 | 27 |
Chance of precipitation in September
Castaños gets around 121 mm of rain over 13 wet days in September, the wettest month. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 42% and peaks near 50% on the wettest days. The odds ease 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 43 | 44 | 45 | 47 | 48 | 49 | 49 | 49 | 50 | 49 | 49 | 48 | 48 | 47 | 46 | 45 | 44 | 43 | 42 | 40 | 39 | 37 | 36 | 34 | 33 | 32 | 30 | 30 | 29 | 28 |
| Rain chance (%) | |
|---|---|
| 1 | 43 |
| 2 | 44 |
| 3 | 45 |
| 4 | 47 |
| 5 | 48 |
| 6 | 49 |
| 7 | 49 |
| 8 | 49 |
| 9 | 50 |
| 10 | 49 |
| 11 | 49 |
| 12 | 48 |
| 13 | 48 |
| 14 | 47 |
| 15 | 46 |
| 16 | 45 |
| 17 | 44 |
| 18 | 43 |
| 19 | 42 |
| 20 | 40 |
| 21 | 39 |
| 22 | 37 |
| 23 | 36 |
| 24 | 34 |
| 25 | 33 |
| 26 | 32 |
| 27 | 30 |
| 28 | 30 |
| 29 | 29 |
| 30 | 28 |
Humidity in September
Most of September feels muggy — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the muggy band about 43% of days. Sticky, muggy-or-worse air turns up on roughly 46% 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 (%) | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 15 | 16 | 17 | 18 | 19 | 20 |
| Comfortable (%) | 14 | 13 | 13 | 13 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 13 | 13 | 13 | 14 | 14 | 15 | 16 | 17 | 18 | 18 | 19 | 20 | 21 | 21 | 22 | 23 |
| Humid (%) | 36 | 35 | 34 | 33 | 32 | 31 | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 31 | 30 | 30 | 30 | 29 |
| Muggy (%) | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 49 | 50 | 50 | 50 | 50 | 50 | 49 | 49 | 48 | 47 | 46 | 44 | 43 | 41 | 40 | 38 | 36 | 34 | 33 | 31 | 30 | 29 | 27 |
| Oppressive (%) | 4 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 2 | 2 | 2 | 2 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 4 | 14 | 36 | 43 | 4 |
| 2 | 4 | 13 | 35 | 44 | 4 |
| 3 | 4 | 13 | 34 | 45 | 4 |
| 4 | 4 | 13 | 33 | 46 | 4 |
| 5 | 4 | 12 | 32 | 47 | 4 |
| 6 | 4 | 12 | 31 | 48 | 5 |
| 7 | 4 | 12 | 30 | 49 | 5 |
| 8 | 4 | 12 | 30 | 49 | 5 |
| 9 | 4 | 12 | 29 | 50 | 5 |
| 10 | 4 | 12 | 29 | 50 | 5 |
| 11 | 5 | 12 | 29 | 50 | 5 |
| 12 | 5 | 12 | 29 | 50 | 5 |
| 13 | 5 | 12 | 29 | 50 | 5 |
| 14 | 5 | 12 | 29 | 49 | 4 |
| 15 | 5 | 13 | 29 | 49 | 4 |
| 16 | 6 | 13 | 30 | 48 | 4 |
| 17 | 6 | 13 | 30 | 47 | 3 |
| 18 | 7 | 14 | 31 | 46 | 3 |
| 19 | 8 | 14 | 31 | 44 | 2 |
| 20 | 9 | 15 | 31 | 43 | 2 |
| 21 | 10 | 16 | 31 | 41 | 2 |
| 22 | 11 | 17 | 31 | 40 | 2 |
| 23 | 12 | 18 | 31 | 38 | 1 |
| 24 | 13 | 18 | 31 | 36 | 1 |
| 25 | 15 | 19 | 31 | 34 | 1 |
| 26 | 16 | 20 | 31 | 33 | 1 |
| 27 | 17 | 21 | 30 | 31 | 1 |
| 28 | 18 | 21 | 30 | 30 | 1 |
| 29 | 19 | 22 | 30 | 29 | 1 |
| 30 | 20 | 23 | 29 | 27 | 1 |
Wind in September
Winds average 7 km/h in September.
Across September, daily wind ranges from about 6 km/h on the calmest days to 7 km/h 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 (km/h) | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 | 6 |
| Feels | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm | calm |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 7 | calm |
| 2 | 7 | calm |
| 3 | 7 | calm |
| 4 | 7 | calm |
| 5 | 7 | calm |
| 6 | 7 | calm |
| 7 | 7 | calm |
| 8 | 7 | calm |
| 9 | 7 | calm |
| 10 | 7 | calm |
| 11 | 7 | calm |
| 12 | 7 | calm |
| 13 | 7 | calm |
| 14 | 7 | calm |
| 15 | 7 | calm |
| 16 | 7 | calm |
| 17 | 6 | calm |
| 18 | 6 | calm |
| 19 | 6 | calm |
| 20 | 6 | calm |
| 21 | 6 | calm |
| 22 | 6 | calm |
| 23 | 6 | calm |
| 24 | 6 | calm |
| 25 | 6 | calm |
| 26 | 6 | calm |
| 27 | 6 | calm |
| 28 | 6 | calm |
| 29 | 6 | calm |
| 30 | 6 | calm |
Sunrise & sunset in September
Daylight runs from about 12 h 36 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 48 minutes over September. Sunrise moves from 6:29 AM to 6:42 AM, and sunset from 7:02 PM to 6:28 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) | 12.6 | 12.5 | 12.5 | 12.5 | 12.5 | 12.4 | 12.4 | 12.4 | 12.3 | 12.3 | 12.3 | 12.3 | 12.2 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12.0 | 12.0 | 12.0 | 12.0 | 11.9 | 11.9 | 11.9 | 11.9 | 11.8 | 11.8 | 11.8 |
| Sunrise (AM) | 6:29 | 6:29 | 6:30 | 6:30 | 6:31 | 6:31 | 6:31 | 6:32 | 6:32 | 6:33 | 6:33 | 6:34 | 6:34 | 6:34 | 6:35 | 6:35 | 6:36 | 6:36 | 6:37 | 6:37 | 6:38 | 6:38 | 6:38 | 6:39 | 6:39 | 6:40 | 6:40 | 6:41 | 6:41 | 6:42 |
| Sunset (PM) | 7:02 | 7:01 | 7:00 | 6:59 | 6:58 | 6:56 | 6:55 | 6:54 | 6:53 | 6:52 | 6:51 | 6:49 | 6:48 | 6:47 | 6:46 | 6:45 | 6:44 | 6:42 | 6:41 | 6:40 | 6:39 | 6:38 | 6:36 | 6:35 | 6:34 | 6:33 | 6:32 | 6:31 | 6:29 | 6:28 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.6 | 6:29 | 7:02 |
| 2 | 12.5 | 6:29 | 7:01 |
| 3 | 12.5 | 6:30 | 7:00 |
| 4 | 12.5 | 6:30 | 6:59 |
| 5 | 12.5 | 6:31 | 6:58 |
| 6 | 12.4 | 6:31 | 6:56 |
| 7 | 12.4 | 6:31 | 6:55 |
| 8 | 12.4 | 6:32 | 6:54 |
| 9 | 12.3 | 6:32 | 6:53 |
| 10 | 12.3 | 6:33 | 6:52 |
| 11 | 12.3 | 6:33 | 6:51 |
| 12 | 12.3 | 6:34 | 6:49 |
| 13 | 12.2 | 6:34 | 6:48 |
| 14 | 12.2 | 6:34 | 6:47 |
| 15 | 12.2 | 6:35 | 6:46 |
| 16 | 12.2 | 6:35 | 6:45 |
| 17 | 12.1 | 6:36 | 6:44 |
| 18 | 12.1 | 6:36 | 6:42 |
| 19 | 12.1 | 6:37 | 6:41 |
| 20 | 12.0 | 6:37 | 6:40 |
| 21 | 12.0 | 6:38 | 6:39 |
| 22 | 12.0 | 6:38 | 6:38 |
| 23 | 12.0 | 6:38 | 6:36 |
| 24 | 11.9 | 6:39 | 6:35 |
| 25 | 11.9 | 6:39 | 6:34 |
| 26 | 11.9 | 6:40 | 6:33 |
| 27 | 11.9 | 6:40 | 6:32 |
| 28 | 11.8 | 6:41 | 6:31 |
| 29 | 11.8 | 6:41 | 6:29 |
| 30 | 11.8 | 6:42 | 6:28 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 5.34 kWh/m².
For context, solar energy here swings from a low near 3.69 kWh/m² to a high of 7.06 kWh/m² in June across the year — September's 5.34 kWh/m² falls in the middle.
| 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) | 5.9 | 5.8 | 5.8 | 5.7 | 5.6 | 5.6 | 5.5 | 5.5 | 5.5 | 5.4 | 5.4 | 5.4 | 5.4 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.2 |
| Level | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 5.9 | Bright |
| 2 | 5.8 | Bright |
| 3 | 5.8 | Bright |
| 4 | 5.7 | Bright |
| 5 | 5.6 | Bright |
| 6 | 5.6 | Bright |
| 7 | 5.5 | Bright |
| 8 | 5.5 | Bright |
| 9 | 5.5 | Bright |
| 10 | 5.4 | Bright |
| 11 | 5.4 | Bright |
| 12 | 5.4 | Bright |
| 13 | 5.4 | Bright |
| 14 | 5.3 | Bright |
| 15 | 5.3 | Bright |
| 16 | 5.3 | Bright |
| 17 | 5.3 | Bright |
| 18 | 5.3 | Bright |
| 19 | 5.3 | Bright |
| 20 | 5.3 | Bright |
| 21 | 5.3 | Bright |
| 22 | 5.3 | Bright |
| 23 | 5.3 | Bright |
| 24 | 5.3 | Bright |
| 25 | 5.3 | Bright |
| 26 | 5.3 | Bright |
| 27 | 5.3 | Bright |
| 28 | 5.3 | Bright |
| 29 | 5.3 | Bright |
| 30 | 5.2 | Bright |
Hazard calendar for Castaños
In September, Castaños sits inside its rainy season season. The full year is below, with each hazard's peak months called out.
Castaños's rainy season runs June–September, when most of the year's rain falls.
Is September a good time to visit Castaños?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is a reasonable time to visit Castaños for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Castaños in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Castaños sees daytime highs around 28°C and nights near 19°C. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.
UV index in Castaños in September
Clear-sky midday UV in September 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 Castaños peaks around July 15 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 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) | 6 | 7 | 9 | 11 | 12 | 12 | 12 | 11 | 11 | 8 | 6 | 5 |
| Level | High | Very high | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | High | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 6 | High |
| Feb | 7 | Very high |
| Mar | 9 | Very high |
| Apr | 11 | Extreme |
| May | 12 | Extreme |
| Jun | 12 | Extreme |
| Jul | 12 | Extreme |
| Aug | 11 | Extreme |
| Sep | 11 | Extreme |
| Oct | 8 | Very high |
| Nov | 6 | High |
| Dec | 5 | Moderate |
Air quality in Castaños in September
Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.
Air quality in Castaños is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (January, 9 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 | 9 | 9 | 11 | 15 | 15 | 18 | 15 | 14 | 11 | 10 | 9 |
| Level | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Good | Good | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 9 | Good |
| Feb | 9 | Good |
| Mar | 9 | Good |
| Apr | 11 | Good |
| May | 15 | Moderate |
| Jun | 15 | Moderate |
| Jul | 18 | Moderate |
| Aug | 15 | Moderate |
| Sep | 14 | Moderate |
| Oct | 11 | Good |
| Nov | 10 | Good |
| Dec | 9 | Good |
Where is Castaños?
Castaños sits at 26.8°N, 101.4°W, 756 m above sea level, in Mexico. The nearest listed city is Monclova, 13 km away.
Topography around Castaños
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Castaños.
Within 3 km, the terrain around Castaños has only modest variations in elevation — a maximum elevation change of 240 m around an average of 777 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,344 m; within 80 km, very significant variations in elevation — a maximum elevation change of 2,316 m.
The land around Castaños is covered by shrubs (58%) and artificial surfaces (26%) within 3 km, shrubs (81%) within 16 km, and shrubs (88%) within 80 km.
Mexico travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B
- 120 / 127 V · 60 Hz
- Prices
- ≈ 54% of US
- price level, 2025
- GDP per capita
- $13,889
- 2025
- Happiness
- 7.0 / 10
- World Happiness, 2025
- Safe drinking water
- 43%
- of population, 2024
- Homicide rate
- 24.9
- per 100k, 2023
- Road deaths
- 12.8
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- Very low
- EF EPI 440
- 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 Castaños (26.7893°, -101.4321°, elevation 756 m), 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).