Ukko in Finnic tradition
As a deity of thunder and the sky, Ukko governs lightning, rain, storms, and atmospheric phenomena in Finno-Ugric tradition. He is also associated with fertility, agricultural abundance, and protection from destructive weather, and is known as Ylijumala, Taivaan Ukko, and Pilvien Pitäjä. In one account, he gathers clouds and sends gentle rain over the earth so that grass, stems, shoots, and sprouts may grow. Other stories describe him striking the first celestial fire and driving a thunderous vehicle across the sky with a hammer, axe, or sword.
The quick answers
Who is Ukko?
Ukko is a Finnic deity associated with thunder and lightning; the sky and atmospheric phenomena; rain and storms; fertility and agricultural abundance; and protection from destructive weather.Source
Source
- the kalevala
- The Oxford Companion to World Mythology
- Maori Religion and Mythology Part 2
What is Ukko the god of?
Ukko is associated with thunder and lightning; the sky and atmospheric phenomena; rain and storms; fertility and agricultural abundance; and protection from destructive weather.Source
Source
- the kalevala
- The Oxford Companion to World Mythology
What family links are recorded for Ukko?
Spouse: Akka.
Ukko’s family, at a glance
with Akka
The names Ukko answers to
Ylijumala
the supreme or over-god
Sourcethe kalevala
Taivaan Ukko
Ukko of the sky or heavens
Sourcethe kalevala
Taivaan Jumala
sky god
SourceThe Oxford Companion to World Mythology
Pilvien Pitäjä
holder or keeper of the clouds
SourceMaori Religion and Mythology Part 2
The myths of Ukko
4 myths, with sources recorded for each.
Ukko Forges New Sun and Moon
Louhi carried away the moon and the sun. She hid the moon inside a rock with mottled sides and placed the sun in a steel hill. She ordered them not to rise or shine unless she released them herself. She also took fire from the houses in Väinämöinen’s district. Darkness covered the Kaleva District. Night remained in the heavens and across the earth.
The young and the middle-aged considered how people could live without the moon and the sun. Maidens went to Ilmarinen’s smithy and asked him to forge a new moon and a new disk of the sun. Ilmarinen rose and began the work. He made the moon from gold and the sun from silver. He placed the forged bodies in the sky, but they gave no light. They did not gleam or shine, and the northern lands remained dark.
Ukko found the darkness strange in the heavens. He struck fire to make a new sun and moon. The fire fell from the sky towards the earth. Väinämöinen and Ilmarinen went to find it. An air maiden told them that it had entered Lake Alue. The attempt to restore light with the forged bodies had failed. The hidden moon and sun remained inside the hill at North Farm.

2 sources· checked 2026-08-19
- 1the kalevalaT1
- 2the ancient sourcesT1
Quote
“Louhi hides the sun and moon, while Ukko sends a fiery spark from heaven towards the earth after Ilmarinen’s forged replacements give no light.”
the ancient sources
Ukko and Akka Cause the Storm
Ukko gathered the clouds in the sky. He held assemblies in the cloud banks and called clouds from the east, the northwest, the west, and the south. He drove them together across the heavens and made them shed gentle rain upon the earth. The clouds moved, and the vault of heaven cried out as they crossed the sky.
A sower bent over the land and scattered seed across the growing clearing. He called upon the woman beneath the earth, the old ruler of the soil and mistress of the land. He asked her to make the turf grow and to force grass from the rich soil. He asked the earth to rise from sleep, and he called for stems, stalks, shoots, and sprouts to rise from his ploughing, sowing, and toil. The rain fell as he sought the return of strength to the land.
Ukko also struck fire in the heavens with his sharp sword and sparkling blade. He struck the fire upon his fingernail and made the flame flash on a finger joint above the earth, among the constellations. He hid the spark in a golden pouch set in silver. A maiden of the air rocked it in a golden cradle on silver cords, while the clouds moved and the heavens cried. When the fire fell from her hands, Ukko was again called upon to send clouds together and make them pour rain. The rain was asked to soothe burned places and restore health.

3 sources· checked 2026-08-19
- 1the kalevalaT1
- 2the ancient sourcesT1
Quote
“When Ukko and Akka come together, or quarrel, thunder and lightning appear and rain falls to earth, bringing fertility.”
the ancient sources
- 3the kalevalaT1
Ukko Strikes the First Fire
Ukko struck a fiery spark in the sky with his sharp sword and made the flame flash from his fingernail, high among the constellations. In another telling, he rubbed the fiery spark together in the sky. He placed the spark in a golden pouch and a silver setting. He gave it to a maiden of the air, who rocked it on a long cloud in a golden cradle hung from silver cords. He meant the light to begin a new moon and a new sun.
The maiden rocked the fire and guarded the flame with her fingers. The clouds moved, the heavens cried, and the vault of heaven bent as the golden cradle swung. Then the fire fell from the maiden’s careless hands. The spark dropped from the heavens through the clouds and passed through eight heavenly spheres and the ninth heaven. It fell towards the earth and brought the first fire with it.
Vainamoinen found the fire inside a red clew that fell from a blue clew. He loosened the red clew and took out the drop of fire that came from the heavens. As he considered what he could use to carry it to the fireless houses and dark cabins, the spark bounced from the hand of the Sun’s son. It burned Vainamoinen’s beard, scorched his cheekbones, and burned his hands. Then it sped over Lake Alue, crossed a juniper grove, and burned a heath and a stand of fir. It travelled farther and burned across half the northern country, the frontier of Savo, and two thirds of Karelia.
Vainamoinen followed the fierce fire. Ilmarinen later quenched the flame with cold and icy water, and the craftsman recovered from his burns. When the fire reached the earth, it became the first earthly flame. Ukko’s spark from the sky brought fire to the ground.

3 sources· checked 2026-08-19
- 1the kalevalaT1
- 2the ancient sourcesT1
Quote
“Ukko makes a fiery spark in the sky, and when the resulting fire falls to earth, it becomes the first earthly flame.”
the ancient sources
- 3the kalevalaT1
Ukko Drives the Thunder Chariot
Ukko drove his thunderous vehicle across the sky. He carried the power of the storm with him and struck rocks or clouds with his weapon. The blows sent thunder across the heavens. The weapon is described in different forms as a hammer, an axe, or a sword. Ukko was also regarded as the god of the elements and as lord of fire.
When he made fire in the heavens, Ukko struck with his sharp sword. A flame flashed from the blade. He struck the fire on his fingernail and on a joint of his finger, high among the constellations. He hid the spark in a golden pouch set in silver. He gave it to a maiden of the air, who rocked it in a golden cradle suspended by silver cords.
The maiden swung the flame on a long cloud at the edge of the sky. The clouds moved, the heavens cried out, and the vault of heaven bent. She lost her grip. The flame fell from her hands, and the fire escaped from her care.
Ukko also sent storms against the Demon’s horse when Lemminkäinen tried to bridle it. He tore the sky apart and brought down sleet, ice, and iron hail. The hail struck the horse’s mane and flanks. In these accounts, thunder and fire follow Ukko’s actions in the sky, whether he travels in his vehicle or uses his weapon against the heavens.

3 sources· checked 2026-08-19
- 1the kalevalaT1
- 2the ancient sourcesT1
Quote
“Ukko travels through the sky in a thunderous vehicle, strikes with his weapon, and causes thunder, fire, storms, and hail to descend or resound.”
the ancient sources
- 3the kalevalaT1
Also mentioned in
Stories elsewhere on MythSource that mention Ukko, each on that figure’s page.
- Otso's hunt, return and feast · on Otso
1 work catalogued
This catalogue brings together reviewed connections and candidates for Ukko: reworks first, then references, then names used as atmosphere. A row is not proof by itself. Reviewed connections appear in Overview, beneath a story or under The wider mythology.
Showing 1 of 1 works.
Game1
- Ukko & Guara: StellarboundName only
A catalogue row is not proof by itself. Reviewed connections appear in Overview, beneath a story or under The wider mythology.
What this page is built from
About this page
Written and maintained by MythSource. How a page gets built.
2 sources are cited on this page and listed below.
Cite this page
MythSource. (n.d.). Ukko. https://www.mythsource.com/figures/ukko
"Ukko." MythSource, n.d., www.mythsource.com/figures/ukko.
"Ukko." MythSource. n.d. https://www.mythsource.com/figures/ukko.
Source details
- The Kalevala, or Poems of the Kaleva District. Elias Lönnrot, compiler; Francis Peabody Magoun, Jr., English translator. Harvard University Press, 1963. English prose translation. Copyright 1963 by the President and Fellows of Harvard College; all rights reserved. MythSource’s accounts are newly written summaries, not quotations from this edition. Source edition
The mythology summaries and identity fields on this page are grounded in the sources listed above. The appearance table records candidates separately; only confirmed connections are presented as modern retellings in Overview.
