Sunlight Hours in Rosario
Sunlight hours, shadow patterns, and solar analysis for Rosario, Argentina
Interactive 3D Shadow Map
Summer afternoon in Rosario
Rosario
3:30 PM • Summer Solstice
Interactive 3D shadow analysis map of Rosario. Shows real building shadows based on sun position calculations. Features include: time-of-day simulation, date selection for seasonal analysis, 3D building rendering, tree shadows, terrain elevation, and sun position indicators. Powered by Mapbox GL JS and SunCalc astronomical calculations.
Today's Sunlight
March Average
Sunrise
07:04
Sunset
19:17
Total Daylight
12h 11m
Sun Altitude
59°
at noon
Seasonal Extremes
Longest Day
14.2h
2026-12-21
Shortest Day
9.9h
2026-06-21
Explore Shadows in 3D
See exactly how building shadows fall across Rosario at any time of day or year.
-32.9468°
-60.6393°
Best Time to Visit Rosario
Month-by-month daylight conditions
Rosario has moderate seasonal variation (4.4h difference between longest and shortest days). November-February offers the best conditions for outdoor activities.
Peak Months
Dec, Jan, Nov, Feb
Shoulder Season
Oct & Mar
Summer
Jan
13.9h
Excellent
Summer
Feb
13.2h
Excellent
Autumn
Mar
12.2h
Great
Autumn
Apr
11.2h
Good
Autumn
May
10.3h
Good
Winter
Jun
9.9h
Fair
Winter
Jul
10.1h
Fair
Winter
Aug
10.8h
Good
Spring
Sep
11.8h
Great
Spring
Oct
12.8h
Great
Spring
Nov
13.7h
Excellent
Summer
Dec
14.2h
Excellent
Golden Hour in Rosario
Best times for photography
March Golden Hour
07:04 - 08:04
Blue hour from 06:34
18:17 - 19:17
Blue hour until 19:47
Best Months
- 1Year-round — Consistent golden hour length
- 2Apr-Oct — Milder temperatures for outdoor shoots
- 3Dec-Feb — Latest sunsets for evening shoots
Photography Tips
- Golden hour transitions are relatively quick - be prepared and in position early
- Midday sun can be harsh; use it for high-contrast architectural photography
- Face north during midday for even lighting on subjects
- Check the 3D shadow map to scout locations and predict light direction
Understanding Rosario's Sunlight
AI-powered insights for your location
Rosario's mid-latitude location (32.9°S) creates moderate seasonal variation, with winter days 4.4 hours shorter than summer. The sun reaches 80° at summer noon but only 34° in winter.
Key Challenges
- 1Low winter sun angle (34°) affects north-facing properties
- 2Consider local weather patterns that may affect sunshine
- 3Urban buildings may create additional shadows
Best Months
October through March offers the longest days and highest sun angles in the Southern Hemisphere.
Garden Tips
North-facing gardens receive the most consistent sunlight year-round in Rosario. Consider shadow patterns from neighboring structures when planning outdoor spaces.
Solar Energy Potential
Is Rosario good for solar panels?
With approximately 1,972 annual sun hours, Rosario has good solar potential. A well-designed system can significantly reduce electricity costs.
Annual Sun Hours
1,972
estimated
Optimal Panel Tilt
33°
facing north
Peak Production
Dec, Jan, Nov
highest output
Relative Monthly Production
Installation Tips for Rosario
- Orient panels north with a 33° tilt for optimal year-round performance
- Use the 3D shadow map to check for obstructions from trees or neighboring buildings
- Consider seasonal tilt adjustment: steeper in winter (48°), flatter in summer (18°)
UV Index & Sun Safety
Protect yourself in Rosario
March UV Index
Maximum protection essential. Avoid outdoor activities during peak hours.
Monthly UV Index
Peak UV Months
Jan, Dec, Feb have the highest UV levels (up to 13). Take extra precautions during these months.
Protection Needed
- SPF 50+ broad-spectrum sunscreen
- Full coverage clothing and wide-brim hat
- Stay indoors 10am-4pm
Outdoor Activities in Rosario
Best times for popular activities
Best Activities in March
Outdoor Dining
56% match
Hiking & Walking
56% match
Photography
56% match
Year-Round Activity Guide
| Activity | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Outdoor Dining | ★ | ★ | ★ | ★ | ★ | |||||||
| Hiking & Walking | ★ | ★ | ★ | ★ | ||||||||
| Beach & Swimming | ★ | ★ | ★ | |||||||||
| Photography | ★ | ★ | ★ | ★ | ★ | |||||||
| Gardening | ★ | ★ | ★ | ★ | ★ | |||||||
| Running & Cycling | ★ | ★ | ★ | ★ | ★ | ★ | ★ |
Outdoor Dining
Enjoy al fresco dining during the warmer months with longer evening light.
Hiking & Walking
Mild temperatures and good daylight make spring and autumn ideal for trails.
Beach & Swimming
Peak sun and warmest temperatures during summer months.
Seasonal Sunlight Calendar
Monthly averages throughout the year
| Month | Sunrise | Sunset | Daylight | Sun Angle |
|---|---|---|---|---|
☀️January | 06:12 | 20:11 | 13h 55m | 78° |
☀️February | 06:41 | 19:50 | 13h 9m | 70° |
March | 07:04 | 19:17 | 12h 11m | 59° |
April | 07:27 | 18:37 | 11h 10m | 47° |
May | 07:48 | 18:08 | 10h 21m | 38° |
June | 08:06 | 17:59 | 9h 56m | 34° |
July | 08:06 | 18:11 | 10h 8m | 36° |
August | 07:42 | 18:31 | 10h 51m | 44° |
September | 07:04 | 18:51 | 11h 49m | 54° |
October | 06:24 | 19:12 | 12h 49m | 66° |
November | 05:55 | 19:39 | 13h 43m | 75° |
☀️December | 05:51 | 20:04 | 14h 9m | 80° |
Summer Solstice
14.2h daylight
Winter Solstice
9.9h daylight
Explore Nearby Cities
Sunlight data for surrounding areas
Frequently Asked Questions
Sunlight in Rosario
1How many hours of sunlight does Rosario get?
How many hours of sunlight does Rosario get?
Rosario receives an average of 12 hours of daylight per day. This varies throughout the year, from 9.9 hours on the shortest day to 14.2 hours on the longest day.
2What is the sun angle in Rosario during winter?
What is the sun angle in Rosario during winter?
During winter solstice, the sun reaches a maximum altitude of only 33.6° above the horizon at solar noon in Rosario. This creates shadows that are 1.5x the height of objects.
3When is the best time for outdoor activities in Rosario?
When is the best time for outdoor activities in Rosario?
October through March offers the longest days and highest sun angles in the Southern Hemisphere.
4How do I plan a garden in Rosario for maximum sunlight?
How do I plan a garden in Rosario for maximum sunlight?
North-facing gardens receive the most consistent sunlight year-round in Rosario. Consider shadow patterns from neighboring structures when planning outdoor spaces.
5What time is golden hour in Rosario?
What time is golden hour in Rosario?
In March, golden hour in Rosario occurs in the morning from 07:04 - 08:04 and in the evening from 18:17 - 19:17. These times shift throughout the year as sunrise and sunset times change.
6What is the UV index in Rosario?
What is the UV index in Rosario?
The UV index in Rosario varies by season. During summer, UV can reach 13 (very high), while winter UV levels are much lower. Always check daily UV forecasts and wear SPF 30+ sunscreen during peak hours (10am-4pm).
7Are solar panels worth it in Rosario?
Are solar panels worth it in Rosario?
Rosario receives approximately 1,972 hours of sunshine annually. This makes it a good location for solar panels, with typical payback periods of 5-10 years. For optimal performance, orient panels north at a 33° tilt angle.
8When is sunrise and sunset in Rosario?
When is sunrise and sunset in Rosario?
In March, sunrise in Rosario is around 07:04 and sunset is around 19:17, giving 12.2 hours of daylight. The earliest sunrise occurs around the summer solstice (05:53) and latest sunset follows shortly after.
9What is the best month to visit Rosario for weather?
What is the best month to visit Rosario for weather?
For optimal daylight and outdoor conditions in Rosario, October through March offers the longest days and highest sun angles in the Southern Hemisphere. The shoulder seasons often offer a good balance of pleasant weather and fewer crowds.
10How long are shadows in Rosario?
How long are shadows in Rosario?
Shadow length varies dramatically by season in Rosario. At summer noon, shadows are only 0.2x the height of objects (sun at 81°). In winter, shadows extend to 1.5x object height (sun at just 34°).