Weather

General Weather Services
Foreca (Finland)

Wind
Windy.com

Precipitation (Rain)
URSA, precipitation (in Finnish) 
 
 
 URSA, precipitation and lightning (in Finnish) 
 
 
 Finnish Meteorological Institute, percipitation

Solar Activity
SpaceWeatherLive.com 
 
 
 SpaceWeather.com

UV-indexes
Finnish Meteorological Institute / Ilmatieteenlaitos

Ozone
Finnish Meteorological Institute

Lightning
LightningMaps.org 
 
 
 Blitzortung.org

The Star Sky
https://www.ursa.fi/taivaalla/tahtitaivas-tanaan.html

Meteorology Organizations
Finland 
 
 
 Finnish Meteorological Institute / Ilmatieteen laitos

Other
URSA:n weather links (page in Finnish, many resource in English) 
 
 NOAA Geostationary Satellite Server

Ice
Finnish Meteorological institute - Ice status (black and white version) 
 
 
 Finnish Meteorological institute - Ice status (color version)