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Plan

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  • Night Outlook
    • Weather
  • Targets
    • Saved targets
  • Plan a night
  • Night plans
    • Logbook

Tools

  • Sky atlas
  • Field of View
  • Exposure Lab
  • Calculators
  • Horizon Studio
  • Sequence Studio
    • Nights
    • Projects

Setup

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  • About & Support
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Fri, Oct 30 · Sample site — Tucson, AZ (not your location) · Choose your site

Weather forecast

Night grade and best window → Night Outlook

Live forecast · Open-Meteo · updated 35 min ago

Seven nights of sky

Every forecast hour from evening to morning, Tucson, AZ time · MST. The sky tone follows the Sun; the white veil is the forecast cloud cover.

  • Cloud 0 → 100%
  • Precipitation
  • Daylight → dark
  • No forecast
15:0018:0021:0000:0003:0006:0009:00CloudWind maxMin tempRain (mm)

Forecast highlights for Fri, Oct 30

  • Cloud while astronomically dark29–100%10 dark hours, 20:00–05:00
  • Lowest temperature19.1 °Cat 04:00
  • Air closest to its dew point5.8 °C apartat 15:00 · 69% humidity
  • Strongest wind20 km/hfrom E at 16:00
  • Precipitation10.9 mmmost at 17:00 (3.4 mm)

Hour by hour · Fri, Oct 30

Cloud at the height it sits, then what reaches the ground. Point at an hour for every value.

Local time
High cloud %1001001001001001000005100100101006051100100100100100
Mid cloud %1001001001001009829701007866455591001008281055
Low cloud %1001007010050000000000505000
Total cloud %10010010010010010029711008110010064100100100100100100100100
Precip mm2.82.03.41.31.00.10.20.1
Temp °C191920212121201920191919191919191920212223
Air
Dew point
Dew point °C131313131212131313131313131313131312121211
Humidity %696966615858626666676767696968666662585348
Wind km/h17201385536412510101010911131212
Seeing (est.)1.91.91.71.71.71.71.71.71.71.71.71.71.71.71.71.71.71.71.71.71.7
Transp. (est.)0.230.230.230.230.230.200.200.200.190.190.190.190.190.190.200.200.200.190.190.190.18

Hour readout

20:00Astronomically dark

Cloud
100%high 100 · mid 98 · low 0
Temperature
21.0 °C
Dew point
12.4 °C8.6 °C below the air
Humidity
58%
Precipitation
0.0 mm
Wind
5 km/hfrom NE
Seeing (est.)
good · ~1.7″ (1.3–2.2″)
Transparency (est.)
excellent · ~0.20 mag/airmass

Seeing and transparency: AstroBrain estimate from NOAA GFS and Copernicus CAMS data via Open-Meteo (CC BY 4.0).

Observing site

Sample site — Tucson, AZ (not your location)Nobody has chosen a site yet, so this is a built-in sample. Use your approximate area or enter a site to read your own sky.

Forecast source

Provider
open-meteo
Forecast model
open-data-aws
Forecast issued
2026-10-30 13:12 UTC
Last checked
2026-10-30 13:12 UTC
Forecast age
Current
Provider confidence
Provider data
  • Open-Meteo does not measure astronomical seeing or transparency. Values shown here are AstroBrain estimates.
  • Forecast age is based on when it was retrieved.

Weather: Open-Meteo open data (CC BY 4.0) from DWD ICON-D2/ICON-EU and NOAA GFS.