Rosario weather in January
In January, Rosario sees average daytime highs of 29°C and overnight lows near 23°C, with 49 mm of rain across 10.2 wet days and about 11.3 hours of daylight. It is the 12th-warmest and 11th-wettest month of the year here.
Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 22% of the time in January, and the air most often feels oppressive.
Daylight stretches from about 11 h 12 min at the start of January to 11 h 24 min by month's end. Set against the rest of the year, January is Rosario's 4th-clearest and 2nd-windiest month. For the whole year in context, see Rosario's year-round climate.
- Daytime high
- 29°
- 12th warmest
- Overnight low
- 23°
- 2nd coldest
- Rainfall
- 49 mm
- 10.2 wet days
- Daylight
- 11 h 18 min
- 6:26 AM – 5:43 PM
- Cloud cover
- 62%
- 4th clearest
- Wind
- 14 km/h
- 2nd windiest
- Solar energy
- 4.65 kWh/m²
- Travel score
- 5.6
- out of 10
Temperature in January
Day-to-day highs hold fairly steady near 29°C through the month.
A typical January day in Rosario reaches about 29°C in the afternoon and slips back to 23°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 30°C. Set against its neighbours, January runs on par with December and about 1°C cooler than February.
| 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 (°C) | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 | 29 |
| Avg low (°C) | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 | 23 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 28 | 23 |
| 2 | 28 | 23 |
| 3 | 28 | 23 |
| 4 | 28 | 23 |
| 5 | 28 | 23 |
| 6 | 28 | 23 |
| 7 | 28 | 23 |
| 8 | 28 | 23 |
| 9 | 28 | 23 |
| 10 | 28 | 23 |
| 11 | 28 | 23 |
| 12 | 28 | 23 |
| 13 | 28 | 23 |
| 14 | 28 | 23 |
| 15 | 28 | 23 |
| 16 | 29 | 23 |
| 17 | 29 | 23 |
| 18 | 29 | 23 |
| 19 | 29 | 23 |
| 20 | 29 | 23 |
| 21 | 29 | 23 |
| 22 | 29 | 23 |
| 23 | 29 | 23 |
| 24 | 29 | 23 |
| 25 | 29 | 23 |
| 26 | 29 | 23 |
| 27 | 29 | 23 |
| 28 | 29 | 23 |
| 29 | 29 | 23 |
| 30 | 29 | 23 |
| 31 | 29 | 23 |
How January really feels in Rosario
Once humidity and wind are folded in, January 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.
January sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.
Rosario weather by month
How January compares with the rest of the year at a glance. January is the 12th-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 | 29° / 23° | 49 | 10.2 | 11.3 | 5.6 |
| Feb | 29° / 23° | 44 | 7.6 | 11.5 | 5.5 |
| Mar | 31° / 24° | 50 | 9.8 | 11.9 | 4.8 |
| Apr | 32° / 25° | 52 | 10.6 | 12.3 | 3.8 |
| May | 33° / 25° | 150 | 20.8 | 12.6 | 2.8 |
| Jun | 32° / 25° | 219 | 24.9 | 12.8 | 2.6 |
| Jul | 31° / 25° | 339 | 27.7 | 12.7 | 2.7 |
| Aug | 30° / 25° | 270 | 26 | 12.5 | 2.8 |
| Sep | 30° / 24° | 329 | 27.1 | 12.1 | 2.7 |
| Oct | 30° / 24° | 236 | 24.6 | 11.7 | 3.2 |
| Nov | 30° / 24° | 145 | 19.9 | 11.4 | 3.9 |
| Dec | 29° / 24° | 187 | 17 | 11.2 | 4.7 |
Cloud cover in January
The sky is clear or mostly clear about 22% of the time in January.
Beyond those clear spells, partly cloudy skies cover about 26% of January, with mostly cloudy or overcast conditions the remaining 52%.
| 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 (%) | 47 | 47 | 48 | 47 | 47 | 47 | 48 | 48 | 47 | 46 | 46 | 45 | 45 | 44 | 45 | 45 | 45 | 45 | 45 | 46 | 46 | 48 | 48 | 49 | 50 | 51 | 52 | 52 | 53 | 53 | 53 |
| Cloudier (%) | 53 | 53 | 52 | 53 | 53 | 53 | 52 | 52 | 53 | 54 | 54 | 55 | 55 | 56 | 55 | 55 | 55 | 55 | 55 | 54 | 54 | 52 | 52 | 51 | 50 | 49 | 48 | 48 | 47 | 47 | 47 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 47 | 53 |
| 2 | 47 | 53 |
| 3 | 48 | 52 |
| 4 | 47 | 53 |
| 5 | 47 | 53 |
| 6 | 47 | 53 |
| 7 | 48 | 52 |
| 8 | 48 | 52 |
| 9 | 47 | 53 |
| 10 | 46 | 54 |
| 11 | 46 | 54 |
| 12 | 45 | 55 |
| 13 | 45 | 55 |
| 14 | 44 | 56 |
| 15 | 45 | 55 |
| 16 | 45 | 55 |
| 17 | 45 | 55 |
| 18 | 45 | 55 |
| 19 | 45 | 55 |
| 20 | 46 | 54 |
| 21 | 46 | 54 |
| 22 | 48 | 52 |
| 23 | 48 | 52 |
| 24 | 49 | 51 |
| 25 | 50 | 50 |
| 26 | 51 | 49 |
| 27 | 52 | 48 |
| 28 | 52 | 48 |
| 29 | 53 | 47 |
| 30 | 53 | 47 |
| 31 | 53 | 47 |
Chance of precipitation in January
Rosario gets around 49 mm of rain over 10.2 wet days in January. 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 39% 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 39 | 38 | 37 | 36 | 35 | 34 | 34 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 34 | 33 | 33 | 32 | 32 | 31 | 31 | 30 | 29 | 29 |
| Rain chance (%) | |
|---|---|
| 1 | 39 |
| 2 | 38 |
| 3 | 37 |
| 4 | 36 |
| 5 | 35 |
| 6 | 34 |
| 7 | 34 |
| 8 | 33 |
| 9 | 33 |
| 10 | 33 |
| 11 | 33 |
| 12 | 33 |
| 13 | 33 |
| 14 | 33 |
| 15 | 34 |
| 16 | 34 |
| 17 | 34 |
| 18 | 34 |
| 19 | 34 |
| 20 | 34 |
| 21 | 34 |
| 22 | 34 |
| 23 | 33 |
| 24 | 33 |
| 25 | 32 |
| 26 | 32 |
| 27 | 31 |
| 28 | 31 |
| 29 | 30 |
| 30 | 29 |
| 31 | 29 |
Humidity in January
Most of January feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, January lands in the oppressive band about 71% 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 (%) | 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 | 1 |
| Muggy (%) | 20 | 20 | 20 | 20 | 20 | 21 | 21 | 22 | 22 | 23 | 24 | 24 | 24 | 25 | 25 | 26 | 26 | 26 | 27 | 27 | 27 | 28 | 28 | 28 | 29 | 29 | 30 | 30 | 31 | 31 | 32 |
| Oppressive (%) | 72 | 73 | 74 | 74 | 75 | 74 | 74 | 74 | 74 | 73 | 73 | 73 | 73 | 72 | 72 | 71 | 71 | 71 | 70 | 70 | 70 | 69 | 69 | 69 | 68 | 68 | 67 | 67 | 66 | 66 | 65 |
| Miserable (%) | 7 | 6 | 5 | 5 | 4 | 4 | 4 | 3 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 | 2 |
| Humid (%) | Muggy (%) | Oppressive (%) | Miserable (%) | |
|---|---|---|---|---|
| 1 | 1 | 20 | 72 | 7 |
| 2 | 1 | 20 | 73 | 6 |
| 3 | 1 | 20 | 74 | 5 |
| 4 | 1 | 20 | 74 | 5 |
| 5 | 1 | 20 | 75 | 4 |
| 6 | 1 | 21 | 74 | 4 |
| 7 | 1 | 21 | 74 | 4 |
| 8 | 1 | 22 | 74 | 3 |
| 9 | 1 | 22 | 74 | 3 |
| 10 | 1 | 23 | 73 | 3 |
| 11 | 1 | 24 | 73 | 2 |
| 12 | 1 | 24 | 73 | 2 |
| 13 | 1 | 24 | 73 | 2 |
| 14 | 1 | 25 | 72 | 2 |
| 15 | 1 | 25 | 72 | 2 |
| 16 | 1 | 26 | 71 | 2 |
| 17 | 1 | 26 | 71 | 2 |
| 18 | 1 | 26 | 71 | 2 |
| 19 | 1 | 27 | 70 | 2 |
| 20 | 1 | 27 | 70 | 2 |
| 21 | 1 | 27 | 70 | 2 |
| 22 | 1 | 28 | 69 | 2 |
| 23 | 1 | 28 | 69 | 2 |
| 24 | 1 | 28 | 69 | 2 |
| 25 | 1 | 29 | 68 | 2 |
| 26 | 1 | 29 | 68 | 2 |
| 27 | 1 | 30 | 67 | 2 |
| 28 | 1 | 30 | 67 | 2 |
| 29 | 1 | 31 | 66 | 2 |
| 30 | 1 | 31 | 66 | 2 |
| 31 | 1 | 32 | 65 | 2 |
Wind in January
Winds average 14 km/h in January.
Across January, daily wind ranges from about 13 km/h on the calmest days to 14 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 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 14 | 13 | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 |
| 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 (km/h) | Feels | |
|---|---|---|
| 1 | 14 | light breeze |
| 2 | 14 | light breeze |
| 3 | 14 | light breeze |
| 4 | 14 | light breeze |
| 5 | 14 | light breeze |
| 6 | 14 | light breeze |
| 7 | 14 | light breeze |
| 8 | 14 | light breeze |
| 9 | 14 | light breeze |
| 10 | 14 | light breeze |
| 11 | 14 | light breeze |
| 12 | 14 | light breeze |
| 13 | 14 | light breeze |
| 14 | 14 | light breeze |
| 15 | 14 | light breeze |
| 16 | 14 | light breeze |
| 17 | 14 | light breeze |
| 18 | 14 | light breeze |
| 19 | 14 | light breeze |
| 20 | 13 | light breeze |
| 21 | 13 | light breeze |
| 22 | 13 | light breeze |
| 23 | 13 | light breeze |
| 24 | 13 | light breeze |
| 25 | 13 | light breeze |
| 26 | 14 | light breeze |
| 27 | 14 | light breeze |
| 28 | 14 | light breeze |
| 29 | 14 | light breeze |
| 30 | 14 | light breeze |
| 31 | 14 | light breeze |
Sunrise & sunset in January
Daylight runs from about 11 h 12 min at the start of January to 11 h 24 min by month's end. The lit band spans sunrise to sunset each day.
Days grow by about 12 minutes over January. Sunrise moves from 6:22 AM to 6:27 AM, and sunset from 5:35 PM to 5:50 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) | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.2 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.3 | 11.4 | 11.4 | 11.4 | 11.4 | 11.4 |
| Sunrise (AM) | 6:22 | 6:22 | 6:23 | 6:23 | 6:23 | 6:24 | 6:24 | 6:24 | 6:25 | 6:25 | 6:25 | 6:25 | 6:26 | 6:26 | 6:26 | 6:26 | 6:26 | 6:26 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 | 6:27 |
| Sunset (PM) | 5:35 | 5:35 | 5:36 | 5:36 | 5:37 | 5:37 | 5:38 | 5:38 | 5:39 | 5:39 | 5:40 | 5:41 | 5:41 | 5:42 | 5:42 | 5:43 | 5:43 | 5:44 | 5:44 | 5:45 | 5:45 | 5:46 | 5:46 | 5:47 | 5:47 | 5:48 | 5:48 | 5:49 | 5:49 | 5:50 | 5:50 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 11.2 | 6:22 | 5:35 |
| 2 | 11.2 | 6:22 | 5:35 |
| 3 | 11.2 | 6:23 | 5:36 |
| 4 | 11.2 | 6:23 | 5:36 |
| 5 | 11.2 | 6:23 | 5:37 |
| 6 | 11.2 | 6:24 | 5:37 |
| 7 | 11.2 | 6:24 | 5:38 |
| 8 | 11.2 | 6:24 | 5:38 |
| 9 | 11.2 | 6:25 | 5:39 |
| 10 | 11.2 | 6:25 | 5:39 |
| 11 | 11.2 | 6:25 | 5:40 |
| 12 | 11.3 | 6:25 | 5:41 |
| 13 | 11.3 | 6:26 | 5:41 |
| 14 | 11.3 | 6:26 | 5:42 |
| 15 | 11.3 | 6:26 | 5:42 |
| 16 | 11.3 | 6:26 | 5:43 |
| 17 | 11.3 | 6:26 | 5:43 |
| 18 | 11.3 | 6:26 | 5:44 |
| 19 | 11.3 | 6:27 | 5:44 |
| 20 | 11.3 | 6:27 | 5:45 |
| 21 | 11.3 | 6:27 | 5:45 |
| 22 | 11.3 | 6:27 | 5:46 |
| 23 | 11.3 | 6:27 | 5:46 |
| 24 | 11.3 | 6:27 | 5:47 |
| 25 | 11.3 | 6:27 | 5:47 |
| 26 | 11.3 | 6:27 | 5:48 |
| 27 | 11.4 | 6:27 | 5:48 |
| 28 | 11.4 | 6:27 | 5:49 |
| 29 | 11.4 | 6:27 | 5:49 |
| 30 | 11.4 | 6:27 | 5:50 |
| 31 | 11.4 | 6:27 | 5:50 |
Solar energy in January
Average shortwave solar energy reaching the ground each day in January, about 4.65 kWh/m².
For context, solar energy here swings from a low near 4.14 kWh/m² to a high of 6.7 kWh/m² in April across the year — January's 4.65 kWh/m² sits near the bottom.
| 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) | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.4 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.5 | 4.6 | 4.6 | 4.6 | 4.6 | 4.7 | 4.7 | 4.7 | 4.7 | 4.8 | 4.8 | 4.8 | 4.8 | 4.9 | 4.9 | 4.9 | 4.9 |
| 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 | Bright |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 4.4 | Bright |
| 2 | 4.4 | Bright |
| 3 | 4.4 | Bright |
| 4 | 4.4 | Bright |
| 5 | 4.4 | Bright |
| 6 | 4.4 | Bright |
| 7 | 4.5 | Bright |
| 8 | 4.5 | Bright |
| 9 | 4.5 | Bright |
| 10 | 4.5 | Bright |
| 11 | 4.5 | Bright |
| 12 | 4.5 | Bright |
| 13 | 4.5 | Bright |
| 14 | 4.5 | Bright |
| 15 | 4.5 | Bright |
| 16 | 4.6 | Bright |
| 17 | 4.6 | Bright |
| 18 | 4.6 | Bright |
| 19 | 4.6 | Bright |
| 20 | 4.7 | Bright |
| 21 | 4.7 | Bright |
| 22 | 4.7 | Bright |
| 23 | 4.7 | Bright |
| 24 | 4.8 | Bright |
| 25 | 4.8 | Bright |
| 26 | 4.8 | Bright |
| 27 | 4.8 | Bright |
| 28 | 4.9 | Bright |
| 29 | 4.9 | Bright |
| 30 | 4.9 | Bright |
| 31 | 4.9 | Bright |
Hazard calendar for Rosario
In January, Rosario sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.
Rosario sits in the Pacific typhoon belt; the season peaks July–October.
Rosario's rainy season runs June–October, when most of the year's rain falls.
Is January a good time to visit Rosario?
Our two travel scores rate January for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
January is a reasonable time to visit Rosario for sightseeing. The water and warmth also suit a beach or pool day.
What to pack for Rosario in January
From January's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In January, Rosario sees daytime highs around 29°C and nights near 23°C. Pack light clothes. Worth having: rain gear and sun protection. About 10 days see rain.
Sea temperature near Rosario in January
The nearest coast averages about 26°C in January — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in June at about 30°C and coldest in February near 26°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 26 | 26 | 27 | 28 | 30 | 30 | 29 | 29 | 29 | 29 | 28 | 27 |
| Comfort | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 26 | Warm |
| Feb | 26 | Warm |
| Mar | 27 | Warm |
| Apr | 28 | Tropical |
| May | 30 | Tropical |
| Jun | 30 | Tropical |
| Jul | 29 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 28 | Tropical |
| Dec | 27 | Warm |
UV index in Rosario in January
Clear-sky midday UV in January 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 Rosario peaks around August 17 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 11 at about 9 (very 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) | 10 | 12 | 12 | 13 | 13 | 13 | 12 | 14 | 13 | 11 | 9 | 9 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 10 | Very high |
| Feb | 12 | Extreme |
| Mar | 12 | Extreme |
| Apr | 13 | Extreme |
| May | 13 | Extreme |
| Jun | 13 | Extreme |
| Jul | 12 | Extreme |
| Aug | 14 | Extreme |
| Sep | 13 | Extreme |
| Oct | 11 | Extreme |
| Nov | 9 | Very high |
| Dec | 9 | Very high |
Where is Rosario?
Rosario sits at 13.6°N, 121.2°E, 13 m above sea level, in Philippines. The nearest listed city is Batangas, 22 km away.
Topography around Rosario
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Rosario.
Within 3 km, the terrain around Rosario has significant variations in elevation — a maximum elevation change of 299 m around an average of 24 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 986 m; within 80 km, extreme variations in elevation — a maximum elevation change of 2,538 m.
The land around Rosario is covered by trees (47%) and water (40%) within 3 km, trees (50%) and water (48%) within 16 km, and trees (44%) and water (44%) within 80 km.
Philippines travel facts
- Travel advisory
- Level 2
- Exercise Increased Caution
- Power plugs
- Type A / B / C
- 230 V · 60 Hz
- Prices
- ≈ 33% of US
- price level, 2025
- GDP per capita
- $4,171
- 2025
- Happiness
- 6.2 / 10
- World Happiness, 2025
- Safe drinking water
- 48%
- of population, 2024
- Homicide rate
- 4.3
- per 100k, 2023
- Road deaths
- 12
- per 100k/yr, 2019
- Income group
- Upper middle
- World Bank
- English
- High
- EF EPI 569
- 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 Rosario (13.6323°, 121.2207°, elevation 13 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).