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Sunlight Analysis

Sunlight Hours in Constanţa

Sunlight hours, shadow patterns, and solar analysis for Constanţa, RO

Interactive 3D Shadow Map

Summer afternoon in Constanţa

Constanţa

3:30 PM • Summer Solstice

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Interactive 3D shadow analysis map of Constanţa. 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.

Drag to rotateScroll to zoomWatch shadows move in real-time

Today's Sunlight

April Average

Sunrise

06:25

Sunset

19:46

Total Daylight

13h 20m

Sun Altitude

56°

at noon

Seasonal Extremes

☀️

Longest Day

15.4h

2026-06-21

❄️

Shortest Day

8.7h

2026-12-21

Interactive 3D

Explore Shadows in 3D

See exactly how building shadows fall across Constanţa at any time of day or year.

Location
Lat

44.1807°

Lng

28.6343°

Launch 3D Map

Best Time to Visit Constanţa

Month-by-month daylight conditions

Constanţa has moderate seasonal variation (6.6h difference between longest and shortest days). May-August offers the best conditions for outdoor activities.

Peak Months

Jun, Jul, May, Aug

Shoulder Season

Apr & Sep

Winter

Jan

9.2h

Fair

Winter

Feb

10.4h

Fair

Spring

Mar

11.8h

Great

Spring

Apr

13.3h

Excellent

Spring

May

14.6h

Excellent

Summer

Jun

15.3h

Excellent

Summer

Jul

15.0h

Excellent

Summer

Aug

13.9h

Excellent

Autumn

Sep

12.4h

Great

Autumn

Oct

10.9h

Good

Autumn

Nov

9.6h

Fair

Winter

Dec

8.9h

Limited

Excellent (14h+) Great (12-14h) Good (10-12h) Fair (8-10h) Limited (<8h)

Golden Hour in Constanţa

Best times for photography

April Golden Hour

Morning

06:25 - 07:25

Blue hour from 05:55

Evening

18:46 - 19:46

Blue hour until 20:16

Best Months

  • 1Year-round — Consistent golden hour length
  • 2Oct-Apr — Milder temperatures for outdoor shoots
  • 3Jun-Aug — 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 south during midday for even lighting on subjects
  • Check the 3D shadow map to scout locations and predict light direction

Scout your shot in 3D

See exactly where shadows fall at any time

Understanding Constanţa's Sunlight

AI-powered insights for your location

Constanţa's mid-latitude location (44.2°N) creates moderate seasonal variation, with winter days 6.6 hours shorter than summer. The sun reaches 69° at summer noon but only 22° in winter.

Key Challenges

  • 1Very low winter sun angle (22°) creates long shadows
  • 2Winter shadows extend 2.4x object height
  • 3Large daylight variation (6.6h) between seasons
  • 4Short winter days (8.7h) limit outdoor activities

Best Months

April through September offers the longest days and highest sun angles in the Northern Hemisphere.

Garden Tips

South-facing gardens receive the most consistent sunlight year-round in Constanţa. Consider shadow patterns from neighboring structures when planning outdoor spaces.

Solar Energy Potential

Is Constanţa good for solar panels?

With approximately 1,989 annual sun hours, Constanţa has good solar potential. A well-designed system can significantly reduce electricity costs.

Annual Sun Hours

1,989

estimated

Optimal Panel Tilt

44°

facing south

Peak Production

Jun, Jul, May

highest output

Relative Monthly Production

Jan
22%
Feb
33%
Mar
50%
Apr
71%
May
90%
Jun
100%
Jul
95%
Aug
78%
Sep
57%
Oct
39%
Nov
25%
Dec
19%

Installation Tips for Constanţa

  • Orient panels south with a 44° 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 (59°), flatter in summer (29°)

UV Index & Sun Safety

Protect yourself in Constanţa

April UV Index

10Very High

Extra protection needed. Avoid midday sun if possible.

UV Index Scale:
1-2 Low3-5 Mod6-7 High8-10 V.High11+ Ext

Monthly UV Index

5
Jan
7
Feb
8
Mar
10
Apr
11
May
11
Jun
11
Jul
10
Aug
9
Sep
7
Oct
6
Nov
5
Dec

Peak UV Months

May, Jun, Jul have the highest UV levels (up to 11). Take extra precautions during these months.

Protection Needed

  • SPF 50+ sunscreen (reapply frequently)
  • Cover up with clothing
  • Avoid sun exposure 10am-4pm

Outdoor Activities in Constanţa

Best times for popular activities

Best Activities in April

🥇

Outdoor Dining

63% match

🥈

Hiking & Walking

63% match

🥉

Photography

63% match

Year-Round Activity Guide

ActivityJanFebMarAprMayJunJulAugSepOctNovDec
Outdoor Dining
★
★
★
★
★
Hiking & Walking
★
★
★
★
Beach & Swimming
★
★
★
Photography
★
★
★
★
★
Gardening
★
★
★
★
★
Running & Cycling
★
★
★
★
★
★
★
★ Best months Good Fair Limited Current month

Outdoor Dining

Enjoy al fresco dining during the warmer months with longer evening light.

Best:Jun, Jul, Aug

Hiking & Walking

Mild temperatures and good daylight make spring and autumn ideal for trails.

Best:Apr, May, Sep

Beach & Swimming

Peak sun and warmest temperatures during summer months.

Best:Jun, Jul, Aug

Seasonal Sunlight Calendar

Monthly averages throughout the year

MonthSunriseSunsetDaylightSun Angle
January
07:4116:48
9h 13m
25°
February
07:0817:31
10h 23m
33°
March
06:2118:08
11h 49m
44°
April
06:2519:46
13h 20m
56°
May
05:4220:21
14h 37m
65°
☀️June
05:2520:46
15h 17m
69°
☀️July
05:3920:42
14h 58m
67°
☀️August
06:1220:07
13h 52m
59°
September
06:4719:13
12h 25m
49°
October
07:2318:18
10h 54m
37°
November
07:0416:35
9h 33m
28°
December
07:3716:23
8h 52m
23°
☀️

Summer Solstice

15.4h daylight

❄️

Winter Solstice

8.7h daylight

Explore Nearby Cities

Sunlight data for surrounding areas

Varna

BG

12.1h avg sunlight

Frequently Asked Questions

Sunlight in Constanţa

1

How many hours of sunlight does Constanţa get?

Constanţa receives an average of 12.1 hours of daylight per day. This varies throughout the year, from 8.7 hours on the shortest day to 15.4 hours on the longest day.

2

What is the sun angle in Constanţa during winter?

During winter solstice, the sun reaches a maximum altitude of only 22.4° above the horizon at solar noon in Constanţa. This creates shadows that are 2.4x the height of objects.

3

When is the best time for outdoor activities in Constanţa?

April through September offers the longest days and highest sun angles in the Northern Hemisphere.

4

How do I plan a garden in Constanţa for maximum sunlight?

South-facing gardens receive the most consistent sunlight year-round in Constanţa. Consider shadow patterns from neighboring structures when planning outdoor spaces.

5

What time is golden hour in Constanţa?

In April, golden hour in Constanţa occurs in the morning from 06:25 - 07:25 and in the evening from 18:46 - 19:46. These times shift throughout the year as sunrise and sunset times change.

6

What is the UV index in Constanţa?

The UV index in Constanţa varies by season. During summer, UV can reach 11 (very high), while winter UV levels are much lower. Always check daily UV forecasts and wear SPF 30+ sunscreen during peak hours (10am-4pm).

7

Are solar panels worth it in Constanţa?

Constanţa receives approximately 1,989 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 south at a 44° tilt angle.

8

When is sunrise and sunset in Constanţa?

In April, sunrise in Constanţa is around 06:25 and sunset is around 19:46, giving 13.3 hours of daylight. The earliest sunrise occurs around the summer solstice (05:25) and latest sunset follows shortly after.

9

What is the best month to visit Constanţa for weather?

For optimal daylight and outdoor conditions in Constanţa, April through September offers the longest days and highest sun angles in the Northern Hemisphere. The shoulder seasons often offer a good balance of pleasant weather and fewer crowds.

10

How long are shadows in Constanţa?

Shadow length varies dramatically by season in Constanţa. At summer noon, shadows are only 0.4x the height of objects (sun at 69°). In winter, shadows extend to 2.4x object height (sun at just 22°).