Rosarito weather in September
In September, Rosarito sees average daytime highs of 22°C and overnight lows near 18°C, with 3 mm of rain across 0.5 wet days and about 12.2 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.
Day-to-day highs hold fairly steady near 22°C through the month. The sky is clear or mostly clear about 81% of the time in September, and the air most often feels humid.
Daylight stretches from about 12 h 42 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Rosarito's 2nd-clearest and 6th-windiest month. For the whole year in context, see Rosarito's year-round climate.
- Daytime high
- 22°
- 2nd warmest
- Overnight low
- 18°
- 11th coldest
- Rainfall
- 3 mm
- 0.5 wet days
- Daylight
- 12 h 12 min
- 5:37 AM – 5:48 PM
- Cloud cover
- 24%
- 2nd clearest
- Wind
- 11 km/h
- 6th windiest
- Solar energy
- 6.11 kWh/m²
- Travel score
- 8.8
- out of 10
Rosarito is municipal seat of Rosarito, State of Baja California, Mexico.
- Founded
- 1885
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in September
Day-to-day highs hold fairly steady near 22°C through the month.
A typical September day in Rosarito reaches about 22°C in the afternoon and slips back to 18°C overnight — a 4°C spread between the day's warmth and the night's chill. On most days the high lands between 19°C and 25°C. Set against its neighbours, September runs on par with August and about 1°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) | 23 | 23 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 | 22 |
| Avg low (°C) | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 19 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 | 18 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 23 | 19 |
| 2 | 23 | 19 |
| 3 | 22 | 19 |
| 4 | 22 | 19 |
| 5 | 22 | 19 |
| 6 | 22 | 19 |
| 7 | 22 | 19 |
| 8 | 22 | 19 |
| 9 | 22 | 19 |
| 10 | 22 | 19 |
| 11 | 22 | 19 |
| 12 | 22 | 19 |
| 13 | 22 | 19 |
| 14 | 22 | 18 |
| 15 | 22 | 18 |
| 16 | 22 | 18 |
| 17 | 22 | 18 |
| 18 | 22 | 18 |
| 19 | 22 | 18 |
| 20 | 22 | 18 |
| 21 | 22 | 18 |
| 22 | 22 | 18 |
| 23 | 22 | 18 |
| 24 | 22 | 18 |
| 25 | 22 | 18 |
| 26 | 22 | 18 |
| 27 | 22 | 18 |
| 28 | 22 | 18 |
| 29 | 22 | 18 |
| 30 | 22 | 18 |
Rosarito weather by month
How September compares with the rest of the year at a glance. September is the 2nd-warmest and 9th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 16° / 12° | 56 | 5.5 | 10.1 | 5.9 |
| Feb | 16° / 12° | 69 | 6.3 | 10.8 | 5.5 |
| Mar | 16° / 12° | 43 | 5.2 | 11.8 | 5.8 |
| Apr | 17° / 13° | 18 | 3.2 | 12.8 | 6.6 |
| May | 18° / 14° | 7 | 1.5 | 13.6 | 7.3 |
| Jun | 19° / 16° | 1 | 0.2 | 14.1 | 8.1 |
| Jul | 21° / 18° | 1 | 0.2 | 13.9 | 8.6 |
| Aug | 22° / 19° | 0 | 0.1 | 13.2 | 9.0 |
| Sep | 22° / 18° | 3 | 0.5 | 12.2 | 8.8 |
| Oct | 21° / 17° | 13 | 2.1 | 11.2 | 8.2 |
| Nov | 19° / 14° | 20 | 3.1 | 10.3 | 7.4 |
| Dec | 16° / 12° | 44 | 5.2 | 9.9 | 6.0 |
Cloud cover in September
The sky is clear or mostly clear about 81% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 7%. 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 95 | 95 | 95 | 95 | 95 | 95 | 95 | 95 | 95 | 95 | 95 | 95 | 94 | 94 | 94 | 93 | 93 | 93 | 92 | 91 | 91 | 91 | 90 | 90 | 90 | 90 | 88 | 88 | 88 | 88 |
| Cloudier (%) | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 5 | 6 | 6 | 6 | 7 | 7 | 7 | 8 | 9 | 9 | 9 | 10 | 10 | 10 | 10 | 12 | 12 | 12 | 12 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 95 | 5 |
| 2 | 95 | 5 |
| 3 | 95 | 5 |
| 4 | 95 | 5 |
| 5 | 95 | 5 |
| 6 | 95 | 5 |
| 7 | 95 | 5 |
| 8 | 95 | 5 |
| 9 | 95 | 5 |
| 10 | 95 | 5 |
| 11 | 95 | 5 |
| 12 | 95 | 5 |
| 13 | 94 | 6 |
| 14 | 94 | 6 |
| 15 | 94 | 6 |
| 16 | 93 | 7 |
| 17 | 93 | 7 |
| 18 | 93 | 7 |
| 19 | 92 | 8 |
| 20 | 91 | 9 |
| 21 | 91 | 9 |
| 22 | 91 | 9 |
| 23 | 90 | 10 |
| 24 | 90 | 10 |
| 25 | 90 | 10 |
| 26 | 90 | 10 |
| 27 | 88 | 12 |
| 28 | 88 | 12 |
| 29 | 88 | 12 |
| 30 | 88 | 12 |
Chance of precipitation in September
Rosarito gets around 3 mm of rain over 0.5 wet days in September. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 2% and peaks near 3% 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 (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 2 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 |
| Rain chance (%) | |
|---|---|
| 1 | 1 |
| 2 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1 |
| 11 | 1 |
| 12 | 1 |
| 13 | 2 |
| 14 | 2 |
| 15 | 2 |
| 16 | 2 |
| 17 | 2 |
| 18 | 2 |
| 19 | 3 |
| 20 | 3 |
| 21 | 3 |
| 22 | 3 |
| 23 | 3 |
| 24 | 3 |
| 25 | 3 |
| 26 | 3 |
| 27 | 3 |
| 28 | 3 |
| 29 | 3 |
| 30 | 3 |
Humidity in September
Most of September feels humid — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the humid band about 51% of days. Sticky, muggy-or-worse air turns up on roughly 20% 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 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | 5 | 5 | 5 | 6 | 6 | 7 | 7 | 8 | 8 | 9 | 10 |
| Comfortable (%) | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 19 | 20 | 21 | 22 | 24 | 25 | 26 | 27 | 27 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 31 | 32 | 33 |
| Humid (%) | 54 | 53 | 52 | 52 | 51 | 51 | 51 | 50 | 50 | 50 | 51 | 50 | 50 | 50 | 51 | 51 | 51 | 52 | 52 | 51 | 52 | 54 | 53 | 54 | 53 | 53 | 52 | 52 | 50 | 49 |
| Muggy (%) | 33 | 33 | 33 | 32 | 32 | 31 | 30 | 29 | 27 | 26 | 24 | 23 | 21 | 20 | 18 | 17 | 16 | 15 | 14 | 14 | 13 | 12 | 12 | 11 | 11 | 10 | 10 | 9 | 9 | 8 |
| Oppressive (%) | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | Oppressive (%) | |
|---|---|---|---|---|---|
| 1 | 1 | 11 | 54 | 33 | 1 |
| 2 | 1 | 12 | 53 | 33 | 1 |
| 3 | 1 | 13 | 52 | 33 | 1 |
| 4 | 1 | 14 | 52 | 32 | 1 |
| 5 | 1 | 15 | 51 | 32 | 1 |
| 6 | 1 | 16 | 51 | 31 | 1 |
| 7 | 1 | 17 | 51 | 30 | 1 |
| 8 | 2 | 19 | 50 | 29 | 1 |
| 9 | 2 | 20 | 50 | 27 | 1 |
| 10 | 2 | 21 | 50 | 26 | 1 |
| 11 | 2 | 22 | 51 | 24 | 1 |
| 12 | 2 | 24 | 50 | 23 | 1 |
| 13 | 3 | 25 | 50 | 21 | 1 |
| 14 | 3 | 26 | 50 | 20 | 1 |
| 15 | 3 | 27 | 51 | 18 | 1 |
| 16 | 4 | 27 | 51 | 17 | 1 |
| 17 | 4 | 28 | 51 | 16 | 1 |
| 18 | 4 | 28 | 52 | 15 | 1 |
| 19 | 4 | 29 | 52 | 14 | 1 |
| 20 | 5 | 29 | 51 | 14 | 1 |
| 21 | 5 | 29 | 52 | 13 | 1 |
| 22 | 5 | 29 | 54 | 12 | 0 |
| 23 | 6 | 29 | 53 | 12 | 0 |
| 24 | 6 | 29 | 54 | 11 | 0 |
| 25 | 7 | 29 | 53 | 11 | 0 |
| 26 | 7 | 30 | 53 | 10 | 0 |
| 27 | 8 | 30 | 52 | 10 | 0 |
| 28 | 8 | 31 | 52 | 9 | 0 |
| 29 | 9 | 32 | 50 | 9 | 0 |
| 30 | 10 | 33 | 49 | 8 | 0 |
Wind in September
Winds average 11 km/h in September.
Across September, daily wind ranges from about 11 km/h on the calmest days to 12 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) | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 | 11 |
| 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 | 12 | calm |
| 2 | 12 | calm |
| 3 | 12 | calm |
| 4 | 12 | calm |
| 5 | 12 | calm |
| 6 | 12 | calm |
| 7 | 12 | calm |
| 8 | 12 | calm |
| 9 | 12 | calm |
| 10 | 12 | calm |
| 11 | 12 | calm |
| 12 | 12 | calm |
| 13 | 11 | calm |
| 14 | 11 | calm |
| 15 | 11 | calm |
| 16 | 11 | calm |
| 17 | 11 | calm |
| 18 | 11 | calm |
| 19 | 11 | calm |
| 20 | 11 | calm |
| 21 | 11 | calm |
| 22 | 11 | calm |
| 23 | 11 | calm |
| 24 | 11 | calm |
| 25 | 11 | calm |
| 26 | 11 | calm |
| 27 | 11 | calm |
| 28 | 11 | calm |
| 29 | 11 | calm |
| 30 | 11 | calm |
Sunrise & sunset in September
Daylight runs from about 12 h 42 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 60 minutes over September. Sunrise moves from 5:27 AM to 5:46 AM, and sunset from 6:09 PM to 5:29 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) | 12.7 | 12.7 | 12.6 | 12.6 | 12.6 | 12.5 | 12.5 | 12.5 | 12.4 | 12.4 | 12.4 | 12.3 | 12.3 | 12.3 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12.0 | 12.0 | 12.0 | 11.9 | 11.9 | 11.9 | 11.8 | 11.8 | 11.8 | 11.7 |
| Sunrise (AM) | 5:27 | 5:28 | 5:28 | 5:29 | 5:30 | 5:30 | 5:31 | 5:31 | 5:32 | 5:33 | 5:33 | 5:34 | 5:35 | 5:35 | 5:36 | 5:37 | 5:37 | 5:38 | 5:39 | 5:39 | 5:40 | 5:41 | 5:41 | 5:42 | 5:43 | 5:43 | 5:44 | 5:45 | 5:45 | 5:46 |
| Sunset (PM) | 6:09 | 6:08 | 6:06 | 6:05 | 6:04 | 6:02 | 6:01 | 5:59 | 5:58 | 5:57 | 5:55 | 5:54 | 5:53 | 5:51 | 5:50 | 5:48 | 5:47 | 5:46 | 5:44 | 5:43 | 5:41 | 5:40 | 5:39 | 5:37 | 5:36 | 5:35 | 5:33 | 5:32 | 5:30 | 5:29 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.7 | 5:27 | 6:09 |
| 2 | 12.7 | 5:28 | 6:08 |
| 3 | 12.6 | 5:28 | 6:06 |
| 4 | 12.6 | 5:29 | 6:05 |
| 5 | 12.6 | 5:30 | 6:04 |
| 6 | 12.5 | 5:30 | 6:02 |
| 7 | 12.5 | 5:31 | 6:01 |
| 8 | 12.5 | 5:31 | 5:59 |
| 9 | 12.4 | 5:32 | 5:58 |
| 10 | 12.4 | 5:33 | 5:57 |
| 11 | 12.4 | 5:33 | 5:55 |
| 12 | 12.3 | 5:34 | 5:54 |
| 13 | 12.3 | 5:35 | 5:53 |
| 14 | 12.3 | 5:35 | 5:51 |
| 15 | 12.2 | 5:36 | 5:50 |
| 16 | 12.2 | 5:37 | 5:48 |
| 17 | 12.2 | 5:37 | 5:47 |
| 18 | 12.1 | 5:38 | 5:46 |
| 19 | 12.1 | 5:39 | 5:44 |
| 20 | 12.1 | 5:39 | 5:43 |
| 21 | 12.0 | 5:40 | 5:41 |
| 22 | 12.0 | 5:41 | 5:40 |
| 23 | 12.0 | 5:41 | 5:39 |
| 24 | 11.9 | 5:42 | 5:37 |
| 25 | 11.9 | 5:43 | 5:36 |
| 26 | 11.9 | 5:43 | 5:35 |
| 27 | 11.8 | 5:44 | 5:33 |
| 28 | 11.8 | 5:45 | 5:32 |
| 29 | 11.8 | 5:45 | 5:30 |
| 30 | 11.7 | 5:46 | 5:29 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 6.11 kWh/m².
For context, solar energy here swings from a low near 3.2 kWh/m² to a high of 7.85 kWh/m² in June across the year — September's 6.11 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) | 6.6 | 6.6 | 6.6 | 6.5 | 6.5 | 6.5 | 6.4 | 6.4 | 6.4 | 6.3 | 6.3 | 6.3 | 6.2 | 6.2 | 6.1 | 6.1 | 6.1 | 6.0 | 6.0 | 5.9 | 5.9 | 5.9 | 5.8 | 5.8 | 5.7 | 5.7 | 5.7 | 5.6 | 5.6 | 5.5 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.6 | Intense |
| 2 | 6.6 | Intense |
| 3 | 6.6 | Intense |
| 4 | 6.5 | Intense |
| 5 | 6.5 | Intense |
| 6 | 6.5 | Intense |
| 7 | 6.4 | Intense |
| 8 | 6.4 | Intense |
| 9 | 6.4 | Intense |
| 10 | 6.3 | Intense |
| 11 | 6.3 | Intense |
| 12 | 6.3 | Intense |
| 13 | 6.2 | Intense |
| 14 | 6.2 | Intense |
| 15 | 6.1 | Intense |
| 16 | 6.1 | Intense |
| 17 | 6.1 | Intense |
| 18 | 6.0 | Intense |
| 19 | 6.0 | Bright |
| 20 | 5.9 | Bright |
| 21 | 5.9 | Bright |
| 22 | 5.9 | Bright |
| 23 | 5.8 | Bright |
| 24 | 5.8 | Bright |
| 25 | 5.7 | Bright |
| 26 | 5.7 | Bright |
| 27 | 5.7 | Bright |
| 28 | 5.6 | Bright |
| 29 | 5.6 | Bright |
| 30 | 5.5 | Bright |
Is September a good time to visit Rosarito?
Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
September is one of the better times to visit Rosarito for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Rosarito in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Rosarito sees daytime highs around 22°C and nights near 18°C. Pack sun protection. Worth having: light clothes.
Sea temperature near Rosarito in September
The nearest coast averages about 21°C in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in August at about 21°C and coldest in February near 15°C.
It's comfortable for a long swim from Jul 18 to Sep 29 — about 2.4 months when the water holds above 20°C.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 15 | 15 | 16 | 16 | 17 | 18 | 20 | 21 | 21 | 19 | 18 | 16 |
| Comfort | Cool | Cool | Cool | Cool | Cool | Cool | Refreshing | Refreshing | Refreshing | Cool | Cool | Cool |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 15 | Cool |
| Feb | 15 | Cool |
| Mar | 16 | Cool |
| Apr | 16 | Cool |
| May | 17 | Cool |
| Jun | 18 | Cool |
| Jul | 20 | Refreshing |
| Aug | 21 | Refreshing |
| Sep | 21 | Refreshing |
| Oct | 19 | Cool |
| Nov | 18 | Cool |
| Dec | 16 | Cool |
UV index in Rosarito in September
Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Rosarito peaks around June 23 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 17 at about 3 (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 | 5 | 5 | 8 | 8 | 11 | 11 | 10 | 8 | 6 | 4 | 3 |
| Level | Moderate | Moderate | High | Very high | Very high | Extreme | Extreme | Extreme | Very high | High | Moderate | Moderate |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 4 | Moderate |
| Feb | 5 | Moderate |
| Mar | 5 | High |
| Apr | 8 | Very high |
| May | 8 | Very high |
| Jun | 11 | Extreme |
| Jul | 11 | Extreme |
| Aug | 10 | Extreme |
| Sep | 8 | Very high |
| Oct | 6 | High |
| Nov | 4 | Moderate |
| Dec | 3 | Moderate |
Air quality in Rosarito 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 Rosarito is worst in October — around 33 µg/m³ PM2.5 (moderate), about 5.4× the cleanest month (May, 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) | 11 | 11 | 10 | 9 | 6 | 9 | 8 | 9 | 16 | 33 | 13 | 17 |
| Level | Good | Good | Good | Good | Good | Good | Good | Good | Moderate | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 11 | Good |
| Feb | 11 | Good |
| Mar | 10 | Good |
| Apr | 9 | Good |
| May | 6 | Good |
| Jun | 9 | Good |
| Jul | 8 | Good |
| Aug | 9 | Good |
| Sep | 16 | Moderate |
| Oct | 33 | Moderate |
| Nov | 13 | Moderate |
| Dec | 17 | Moderate |
Where is Rosarito?
Rosarito sits at 32.4°N, 117.0°W, 46 m above sea level, in Mexico. The nearest listed city is Pórticos de San Antonio, 9.0 km away.
Topography around Rosarito
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Rosarito.
Within 3 km, the terrain around Rosarito has only modest variations in elevation — a maximum elevation change of 174 m around an average of 58 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 725 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,966 m.
The land around Rosarito is covered by artificial surfaces (39%) and grassland (37%) within 3 km, water (45%) and grassland (30%) within 16 km, and water (38%) and shrubs (27%) 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 Rosarito (32.3604°, -117.0464°, elevation 46 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. Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).