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Teresina

Piauí, Brazil
Today
Feb 21, 2026
Poor

Netflix & Chill Night (Too Cloudy)

100% cloud cover — nothing to see tonight. Good time to plan next week.

Tonight's Forecast
0
/ 100
First Light Index
Poor
Our proprietary metric combining sky clarity, moon interference, and light pollution for optimal stargazing conditions.
0
/ 100
Shutter Score
Poor
Photography-specific metric factoring cloud quality and golden hour potential for landscape shooters.

Light Windows Today

Blue HourGolden HourGolden HourBlue Hour
4 AM12 PM11 PM
Sunrise
5:57 AM
Golden: 41min
Sunset
6:11 PM
Golden: 41min
True Darkness
7:22 PM
Stars visible

Add to Calendar

Get reminders for golden hour and dark sky windows

Morning Golden Hour
5:44 AM - 6:25 AM
Evening Golden Hour
5:43 PM - 6:24 PM
Dark Sky Window
7:22 PM onwards
📱 How to use:
  1. 1. Download the .ics file above
  2. 2. Open it with your calendar app (iPhone Calendar, Google Calendar, Outlook)
  3. 3. Events will be added automatically
  4. 4. You'll get 30-minute reminders before each window
30-min reminders
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Moon Phase

14%
Phase
Waxing Gibbous
Illumination
14%
💡 Slight Moon Interference
Moon may affect darkest sky observations

Light Pollution

9
Class 1
DarkClass 5
SuburbanClass 9
City
Teresina Classification
Poor for Astronomy
Bortle Class 9: Inner City Sky

Inner city sky

Visible Tonight

Entire sky brightly lit, only Moon, planets, and brightest stars visible

💡 Urban Sky Recommendation
Focus on lunar and planetary observation. Consider driving to a darker location for deep sky work.
💡 Tip: Check "Nearby Dark Sky" section below to find better observing sites within driving distance

Weather Conditions

Cloud Cover
100%
Overcast - poor conditions for photography
Morning
100%
Evening
100%
Overnight
100%
Precipitation
51%
Likely
Wind
6
km/h avg
Gusts up to 12 km/h
🟢 Calm - Excellent for tracking
Humidity
86%
High - May cause haze
Visibility
23.4
km
Excellent clarity
Temperature
29°C
High
/
24°C
Low
Seeing
2
/ 5
Fair - Atmospheric stability
Transparency
1
/ 5
Hazy - Air clarity
Conditions Summary
🌪️ Poor seeing - Stick to wide-field imaging or wait for better atmospheric stability

Nearby Dark Sky Locations

Within 100km

Estreito

Bortle
9
2
Dramatic improvement
91.4km·~1h 9min

Várzea Alegre

Bortle
9
2
Dramatic improvement
269.7km·~3h 22min

Pio XII

Bortle
9
2
Dramatic improvement
295.6km·~3h 42min
💡 These locations have significantly darker skies (9 → 2). Expect 128x more visible stars.

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