Santa Rosa weather in September
In September, Santa Rosa sees average daytime highs of 28°C and overnight lows near 15°C, with 22 mm of rain across 4.3 wet days and about 11.9 hours of daylight. It is the 6th-warmest and 11th-wettest month of the year here.
Highs climb over the month, from about 27°C in the first days to 29°C by the end. The sky is clear or mostly clear about 54% of the time in September, and the air most often feels dry.
Daylight stretches from about 11 h 30 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Santa Rosa's 2nd-clearest and 2nd-windiest month. For the whole year in context, see Santa Rosa's year-round climate.
- Daytime high
- 28°
- 6th warmest
- Overnight low
- 15°
- 5th coldest
- Rainfall
- 22 mm
- 4.3 wet days
- Daylight
- 11 h 54 min
- 7:16 AM – 7:08 PM
- Cloud cover
- 41%
- 2nd clearest
- Wind
- 7 km/h
- 2nd windiest
- Solar energy
- 5.26 kWh/m²
- Travel score
- 7.1
- out of 10
Temperature in September
Highs climb over the month, from about 27°C in the first days to 29°C by the end.
A typical September day in Santa Rosa reaches about 28°C in the afternoon and slips back to 15°C overnight — a 14°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 35°C. Set against its neighbours, September runs about 3°C warmer than August and about 2°C cooler 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) | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| Avg low (°C) | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 15 | 16 | 16 | 16 | 16 | 16 | 16 | 16 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 13 |
| 2 | 27 | 13 |
| 3 | 27 | 13 |
| 4 | 27 | 13 |
| 5 | 27 | 13 |
| 6 | 27 | 14 |
| 7 | 27 | 14 |
| 8 | 27 | 14 |
| 9 | 27 | 14 |
| 10 | 28 | 14 |
| 11 | 28 | 14 |
| 12 | 28 | 14 |
| 13 | 28 | 14 |
| 14 | 28 | 14 |
| 15 | 28 | 14 |
| 16 | 28 | 15 |
| 17 | 28 | 15 |
| 18 | 28 | 15 |
| 19 | 28 | 15 |
| 20 | 28 | 15 |
| 21 | 29 | 15 |
| 22 | 29 | 15 |
| 23 | 29 | 15 |
| 24 | 29 | 16 |
| 25 | 29 | 16 |
| 26 | 29 | 16 |
| 27 | 29 | 16 |
| 28 | 29 | 16 |
| 29 | 29 | 16 |
| 30 | 29 | 16 |
How September really feels in Santa Rosa
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.
Santa Rosa weather by month
How September compares with the rest of the year at a glance. September is the 6th-warmest and 11th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 31° / 22° | 224 | 16.5 | 13.3 | 3.7 |
| Feb | 30° / 21° | 228 | 16.2 | 12.8 | 4.1 |
| Mar | 28° / 20° | 249 | 18.1 | 12.2 | 4.8 |
| Apr | 25° / 17° | 162 | 15.3 | 11.5 | 5.9 |
| May | 22° / 14° | 79 | 11.9 | 10.9 | 6.3 |
| Jun | 20° / 11° | 38 | 7.9 | 10.6 | 6.6 |
| Jul | 21° / 9° | 23 | 5.1 | 10.7 | 7.5 |
| Aug | 25° / 11° | 16 | 3.6 | 11.2 | 8.3 |
| Sep | 28° / 15° | 22 | 4.3 | 11.9 | 7.1 |
| Oct | 30° / 18° | 81 | 9.5 | 12.5 | 5.0 |
| Nov | 31° / 20° | 126 | 11.9 | 13.1 | 4.3 |
| Dec | 31° / 21° | 218 | 15.4 | 13.4 | 3.7 |
Cloud cover in September
The sky is clear or mostly clear about 54% of the time in September.
Beyond those clear spells, partly cloudy skies cover about 13% of September, 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 74 | 73 | 72 | 72 | 72 | 71 | 71 | 70 | 71 | 70 | 70 | 70 | 70 | 70 | 69 | 68 | 68 | 67 | 67 | 66 | 64 | 64 | 63 | 62 | 60 | 60 | 59 | 58 | 57 | 57 |
| Cloudier (%) | 26 | 27 | 28 | 28 | 28 | 29 | 29 | 30 | 29 | 30 | 30 | 30 | 30 | 30 | 31 | 32 | 32 | 33 | 33 | 34 | 36 | 36 | 37 | 38 | 40 | 40 | 41 | 42 | 43 | 43 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 74 | 26 |
| 2 | 73 | 27 |
| 3 | 72 | 28 |
| 4 | 72 | 28 |
| 5 | 72 | 28 |
| 6 | 71 | 29 |
| 7 | 71 | 29 |
| 8 | 70 | 30 |
| 9 | 71 | 29 |
| 10 | 70 | 30 |
| 11 | 70 | 30 |
| 12 | 70 | 30 |
| 13 | 70 | 30 |
| 14 | 70 | 30 |
| 15 | 69 | 31 |
| 16 | 68 | 32 |
| 17 | 68 | 32 |
| 18 | 67 | 33 |
| 19 | 67 | 33 |
| 20 | 66 | 34 |
| 21 | 64 | 36 |
| 22 | 64 | 36 |
| 23 | 63 | 37 |
| 24 | 62 | 38 |
| 25 | 60 | 40 |
| 26 | 60 | 40 |
| 27 | 59 | 41 |
| 28 | 58 | 42 |
| 29 | 57 | 43 |
| 30 | 57 | 43 |
Chance of precipitation in September
Santa Rosa gets around 22 mm of rain over 4.3 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 14% and peaks near 21% 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 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 12 | 12 | 13 | 13 | 13 | 13 | 13 | 13 | 13 | 12 | 12 | 12 | 11 | 11 | 12 | 12 | 12 | 12 | 13 | 13 | 14 | 15 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 21 |
| Rain chance (%) | |
|---|---|
| 1 | 12 |
| 2 | 12 |
| 3 | 13 |
| 4 | 13 |
| 5 | 13 |
| 6 | 13 |
| 7 | 13 |
| 8 | 13 |
| 9 | 13 |
| 10 | 12 |
| 11 | 12 |
| 12 | 12 |
| 13 | 11 |
| 14 | 11 |
| 15 | 12 |
| 16 | 12 |
| 17 | 12 |
| 18 | 12 |
| 19 | 13 |
| 20 | 13 |
| 21 | 14 |
| 22 | 15 |
| 23 | 15 |
| 24 | 16 |
| 25 | 17 |
| 26 | 18 |
| 27 | 19 |
| 28 | 20 |
| 29 | 21 |
| 30 | 21 |
Humidity in September
Most of September feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, September lands in the dry band about 70% of days. It rarely turns muggy — the humid and sticky bands barely register.
| 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 (%) | 75 | 75 | 75 | 74 | 74 | 74 | 74 | 75 | 75 | 74 | 74 | 74 | 74 | 74 | 73 | 73 | 73 | 72 | 71 | 70 | 69 | 67 | 66 | 64 | 62 | 60 | 59 | 56 | 55 | 55 |
| Comfortable (%) | 17 | 17 | 17 | 17 | 17 | 17 | 17 | 16 | 16 | 17 | 17 | 17 | 17 | 17 | 18 | 18 | 18 | 18 | 19 | 19 | 19 | 20 | 20 | 21 | 21 | 21 | 21 | 22 | 22 | 22 |
| Humid (%) | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 8 | 9 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 17 | 18 | 19 | 20 | 20 |
| Muggy (%) | 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 | 2 | 2 | 3 | 3 | 3 |
| Dry (%) | Comfortable (%) | Humid (%) | Muggy (%) | |
|---|---|---|---|---|
| 1 | 75 | 17 | 8 | 0 |
| 2 | 75 | 17 | 8 | 0 |
| 3 | 75 | 17 | 8 | 0 |
| 4 | 74 | 17 | 8 | 1 |
| 5 | 74 | 17 | 8 | 1 |
| 6 | 74 | 17 | 8 | 1 |
| 7 | 74 | 17 | 8 | 1 |
| 8 | 75 | 16 | 8 | 1 |
| 9 | 75 | 16 | 8 | 1 |
| 10 | 74 | 17 | 8 | 1 |
| 11 | 74 | 17 | 8 | 1 |
| 12 | 74 | 17 | 8 | 1 |
| 13 | 74 | 17 | 8 | 1 |
| 14 | 74 | 17 | 8 | 1 |
| 15 | 73 | 18 | 8 | 1 |
| 16 | 73 | 18 | 8 | 1 |
| 17 | 73 | 18 | 8 | 1 |
| 18 | 72 | 18 | 9 | 1 |
| 19 | 71 | 19 | 9 | 1 |
| 20 | 70 | 19 | 10 | 1 |
| 21 | 69 | 19 | 11 | 1 |
| 22 | 67 | 20 | 12 | 1 |
| 23 | 66 | 20 | 13 | 1 |
| 24 | 64 | 21 | 14 | 1 |
| 25 | 62 | 21 | 15 | 2 |
| 26 | 60 | 21 | 17 | 2 |
| 27 | 59 | 21 | 18 | 2 |
| 28 | 56 | 22 | 19 | 3 |
| 29 | 55 | 22 | 20 | 3 |
| 30 | 55 | 22 | 20 | 3 |
Wind in September
Winds average 7 km/h in September.
Across September, daily wind ranges from about 7 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 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 | 7 |
| 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 | 7 | calm |
| 18 | 7 | calm |
| 19 | 7 | calm |
| 20 | 7 | calm |
| 21 | 7 | calm |
| 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 September
Daylight runs from about 11 h 30 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 42 minutes over September. Sunrise moves from 7:32 AM to 7:01 AM, and sunset from 7:03 PM to 7:13 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) | 11.5 | 11.5 | 11.6 | 11.6 | 11.6 | 11.6 | 11.7 | 11.7 | 11.7 | 11.7 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.9 | 11.9 | 11.9 | 11.9 | 12.0 | 12.0 | 12.0 | 12.0 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.2 | 12.2 |
| Sunrise (AM) | 7:32 | 7:31 | 7:30 | 7:29 | 7:28 | 7:27 | 7:26 | 7:25 | 7:23 | 7:22 | 7:21 | 7:20 | 7:19 | 7:18 | 7:17 | 7:16 | 7:15 | 7:14 | 7:13 | 7:12 | 7:11 | 7:10 | 7:09 | 7:08 | 7:06 | 7:05 | 7:04 | 7:03 | 7:02 | 7:01 |
| Sunset (PM) | 7:03 | 7:03 | 7:04 | 7:04 | 7:04 | 7:05 | 7:05 | 7:05 | 7:06 | 7:06 | 7:06 | 7:07 | 7:07 | 7:07 | 7:08 | 7:08 | 7:08 | 7:09 | 7:09 | 7:09 | 7:10 | 7:10 | 7:10 | 7:11 | 7:11 | 7:11 | 7:12 | 7:12 | 7:12 | 7:13 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.5 | 7:32 | 7:03 |
| 2 | 11.5 | 7:31 | 7:03 |
| 3 | 11.6 | 7:30 | 7:04 |
| 4 | 11.6 | 7:29 | 7:04 |
| 5 | 11.6 | 7:28 | 7:04 |
| 6 | 11.6 | 7:27 | 7:05 |
| 7 | 11.7 | 7:26 | 7:05 |
| 8 | 11.7 | 7:25 | 7:05 |
| 9 | 11.7 | 7:23 | 7:06 |
| 10 | 11.7 | 7:22 | 7:06 |
| 11 | 11.8 | 7:21 | 7:06 |
| 12 | 11.8 | 7:20 | 7:07 |
| 13 | 11.8 | 7:19 | 7:07 |
| 14 | 11.8 | 7:18 | 7:07 |
| 15 | 11.8 | 7:17 | 7:08 |
| 16 | 11.9 | 7:16 | 7:08 |
| 17 | 11.9 | 7:15 | 7:08 |
| 18 | 11.9 | 7:14 | 7:09 |
| 19 | 11.9 | 7:13 | 7:09 |
| 20 | 12.0 | 7:12 | 7:09 |
| 21 | 12.0 | 7:11 | 7:10 |
| 22 | 12.0 | 7:10 | 7:10 |
| 23 | 12.0 | 7:09 | 7:10 |
| 24 | 12.1 | 7:08 | 7:11 |
| 25 | 12.1 | 7:06 | 7:11 |
| 26 | 12.1 | 7:05 | 7:11 |
| 27 | 12.1 | 7:04 | 7:12 |
| 28 | 12.1 | 7:03 | 7:12 |
| 29 | 12.2 | 7:02 | 7:12 |
| 30 | 12.2 | 7:01 | 7:13 |
Solar energy in September
Average shortwave solar energy reaching the ground each day in September, about 5.26 kWh/m².
For context, solar energy here swings from a low near 2.94 kWh/m² to a high of 5.68 kWh/m² in December across the year — September's 5.26 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) | 5.0 | 5.0 | 5.1 | 5.1 | 5.1 | 5.1 | 5.1 | 5.2 | 5.2 | 5.2 | 5.2 | 5.2 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.3 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 |
| 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 | 5.0 | Bright |
| 2 | 5.0 | Bright |
| 3 | 5.1 | Bright |
| 4 | 5.1 | Bright |
| 5 | 5.1 | Bright |
| 6 | 5.1 | Bright |
| 7 | 5.1 | Bright |
| 8 | 5.2 | Bright |
| 9 | 5.2 | Bright |
| 10 | 5.2 | Bright |
| 11 | 5.2 | Bright |
| 12 | 5.2 | Bright |
| 13 | 5.3 | Bright |
| 14 | 5.3 | Bright |
| 15 | 5.3 | Bright |
| 16 | 5.3 | Bright |
| 17 | 5.3 | Bright |
| 18 | 5.3 | Bright |
| 19 | 5.4 | Bright |
| 20 | 5.4 | Bright |
| 21 | 5.4 | Bright |
| 22 | 5.4 | Bright |
| 23 | 5.4 | Bright |
| 24 | 5.4 | Bright |
| 25 | 5.4 | Bright |
| 26 | 5.4 | Bright |
| 27 | 5.4 | Bright |
| 28 | 5.4 | Bright |
| 29 | 5.4 | Bright |
| 30 | 5.4 | Bright |
Hazard calendar for Santa Rosa
None of Santa Rosa's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.
Santa Rosa's monsoon runs November–April, when most of the year's rain falls.
Is September a good time to visit Santa Rosa?
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 Santa Rosa for general sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Santa Rosa in September
From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In September, Santa Rosa sees daytime highs around 28°C and nights near 15°C. Pack light clothes. Worth having: sun protection. About 4 days see rain.
UV index in Santa Rosa in September
Clear-sky midday UV in September 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 Santa Rosa peaks around January 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 5 (high).
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) | 15 | 14 | 13 | 9 | 7 | 6 | 5 | 8 | 10 | 8 | 13 | 14 |
| Level | Extreme | Extreme | Extreme | Very high | High | High | High | Very high | Very high | Very high | Extreme | Extreme |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 15 | Extreme |
| Feb | 14 | Extreme |
| Mar | 13 | Extreme |
| Apr | 9 | Very high |
| May | 7 | High |
| Jun | 6 | High |
| Jul | 5 | High |
| Aug | 8 | Very high |
| Sep | 10 | Very high |
| Oct | 8 | Very high |
| Nov | 13 | Extreme |
| Dec | 14 | Extreme |
Air quality in Santa Rosa 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 Santa Rosa is worst in September — around 36 µg/m³ PM2.5 (poor), about 8.2× the cleanest month (May, 4 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) | 8 | 8 | 7 | 5 | 4 | 7 | 8 | 15 | 36 | 32 | 27 | 17 |
| Level | Good | Good | Good | Good | Good | Good | Good | Moderate | Poor | Moderate | Moderate | Moderate |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 8 | Good |
| Feb | 8 | Good |
| Mar | 7 | Good |
| Apr | 5 | Good |
| May | 4 | Good |
| Jun | 7 | Good |
| Jul | 8 | Good |
| Aug | 15 | Moderate |
| Sep | 36 | Poor |
| Oct | 32 | Moderate |
| Nov | 27 | Moderate |
| Dec | 17 | Moderate |
Where is Santa Rosa?
Santa Rosa sits at 23.4°S, 64.4°W, 341 m above sea level, in Argentina. The nearest listed city is Pichanal, 23 km away.
Topography around Santa Rosa
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Santa Rosa.
Within 3 km, the terrain around Santa Rosa has only modest variations in elevation — a maximum elevation change of 78 m around an average of 352 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 433 m; within 80 km, extreme variations in elevation — a maximum elevation change of 4,850 m.
The land around Santa Rosa is covered by cropland (43%) and trees (31%) within 3 km, trees (62%) and cropland (31%) within 16 km, and trees (64%) within 80 km.
Argentina travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type C / I
- 220 V · 50 Hz
- Prices
- ≈ 46% of US
- price level, 2025
- GDP per capita
- $14,898
- 2025
- Happiness
- 6.4 / 10
- World Happiness, 2025
- Homicide rate
- 4.5
- per 100k, 2023
- Road deaths
- 14.1
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- High
- EF EPI 575
- 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 Santa Rosa (-23.3943°, -64.4251°, elevation 341 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).