StormDebris:
The History of Meteorology
Presocratic Cosmology and Early Weather Thought
In the centuries before Aristotle systematized natural philosophy, several Greek thinkers began proposing explanations for natural phenomena that did not rely on mythological causes. These philosophers, commonly grouped under the term Presocratics, lived primarily in the 6th and 5th centuries BCE and sought to explain the structure and behavior of the universe through underlying physical principles.
Although their primary concern was cosmology rather than atmospheric science, many Presocratic thinkers offered early explanations for weather phenomena such as wind, clouds, rain, thunder, and lightning. These explanations were often speculative and based on limited observation, but they represent some of the earliest attempts to treat weather as a natural process governed by physical mechanisms rather than divine intervention.
Later philosophers, particularly Aristotle, would develop more systematic approaches to atmospheric phenomena. Aristotle’s Meteorologica in particular reflects the influence of earlier Presocratic ideas concerning elemental substances and the transformation of matter within the natural world.
Date: c. 600–400 BCE
Location: Greek cities of Ionia and the wider Greek world
Type: Early natural philosophy and cosmology
Key Figures: Thales, Anaximander, Anaximenes, Xenophanes, Empedocles
Why it matters: Introduced natural explanations for atmospheric phenomena
Timeline placement: Antiquity & Early Weather Knowledge
Historical Context
In archaic Greek culture, atmospheric phenomena were commonly interpreted through mythology. Thunder and lightning were associated with the authority of Zeus, while storms and unusual weather events were often understood as expressions of divine will.
Beginning in the 6th century BCE, philosophers from the Ionian region, particularly the city of Miletus, began pursuing explanations based on underlying natural principles. Rather than asking which god produced a storm, these thinkers asked what material processes or physical transformations might account for such events.
This intellectual movement did not yet involve experimental science or systematic measurement. As G. E. R. Lloyd has emphasized, it relied instead on observation, philosophical reasoning, and attempts to identify fundamental substances capable of explaining the diversity of natural phenomena.
Most Presocratic writings have not survived in complete form. Their ideas are preserved primarily through fragments quoted by later authors such as Aristotle, Simplicius, and Diogenes Laertius. Despite this fragmentary record, several Presocratic theories clearly address atmospheric processes and the behavior of air, moisture, and clouds.
Map of the Ionian region of western Anatolia, showing major Greek cities such as Miletus and Ephesus where early natural philosophers developed some of the earliest natural explanations of weather and the cosmos. Wikimedia Commons, licensed under CC BY-SA 3.0.
Thales of Miletus
Thales (c. 624–546 BCE) is often regarded as one of the earliest philosophers in the Greek tradition. Aristotle attributes to him the proposal that water (hydōr) is the fundamental substance underlying all material existence.
Although this claim was cosmological rather than meteorological, it reflects an early attempt to explain natural phenomena through a single physical principle rather than through mythological narrative. Aristotle later cited Thales as an example of philosophers who sought material explanations for natural processes.
Anaximander
Anaximander (c. 610–546 BCE), a student of Thales, proposed that the universe originated from an indefinite and boundless substance known as the apeiron.
Fragments attributed to Anaximander indicate that he attempted to describe several atmospheric phenomena in natural terms. According to Kirk, Raven, and Schofield, Anaximander explained thunder and lightning as disturbances occurring within clouds through the movement and compression of air rather than through divine action.
Some accounts also attribute to him early ideas concerning the role of solar heat in lifting moisture from the Earth, contributing to the formation of winds and precipitation.
Anaximenes
Anaximenes (c. 586–526 BCE) proposed that air (aēr) was the fundamental substance from which all matter derived.
In his cosmological model, transformations between substances occurred through processes of rarefaction and condensation. According to Kirk, Raven, and Schofield, rarefied air became fire, while progressively condensed air produced wind, clouds, water, earth, and eventually stone.
This model represents one of the earliest attempts to describe atmospheric processes, such as cloud formation and precipitation, through physical transformations within air.
Xenophanes
Xenophanes of Colophon (c. 570–478 BCE) criticized anthropomorphic explanations of natural phenomena and proposed that clouds played a central role in atmospheric events.
According to Kirk, Raven, and Schofield, fragments attributed to Xenophanes suggest that he explained rainbows and other optical phenomena through the behavior of clouds rather than divine action. Some interpretations also indicate that he recognized the role of evaporation from the sea in forming clouds and rainfall.
Empedocles
Empedocles (c. 494–434 BCE) introduced a cosmological model based on four fundamental elements: earth, water, air, and fire.
According to his theory, these elements combined and separated under the influence of opposing forces known as Love and Strife. Although primarily philosophical in intent, this framework later became central to many ancient explanations of atmospheric processes.
Later philosophers, including Plato and Aristotle, adopted and elaborated the four-element theory, incorporating it into broader systems of natural philosophy.
What They Proposed
The four classical elements (earth, water, air, and fire) became a foundational framework in ancient natural philosophy after Empedocles.
Strengths and Insights
Although Presocratic explanations were often speculative, they introduced several important conceptual developments in the early study of nature.
One of the most significant contributions was the shift toward natural explanations for atmospheric phenomena. Rather than attributing storms, lightning, or unusual weather to divine action, Presocratic thinkers attempted to explain such events through processes occurring within the natural world. As G. E. R. Lloyd has emphasized, this change in explanatory approach represents a major intellectual development in early Greek science, marking a movement away from mythological interpretation toward causal accounts of natural phenomena.
Presocratic philosophers also introduced material models of environmental change. By proposing fundamental substances such as water, air, or the indefinite apeiron, they attempted to explain how different natural phenomena could arise from transformations within a single underlying substance. Although these models were highly simplified, they reflect an effort to understand weather and other natural events as the result of physical processes rather than supernatural intervention.
Several Presocratic thinkers also attempted to describe specific atmospheric mechanisms. Anaximenes, for example, proposed that changes in the density of air could produce wind, clouds, and precipitation through condensation and rarefaction. Xenophanes associated atmospheric optical phenomena such as rainbows with the behavior of clouds, while other early explanations linked solar heat with the lifting of moisture from the Earth. These ideas do not correspond closely to modern meteorology, but they demonstrate an early interest in identifying the processes that generate atmospheric change.
Taken together, these ideas represent some of the earliest attempts to treat the atmosphere as a system governed by natural processes. Although the Presocratics lacked the observational tools and empirical methods that later scientific traditions would develop, their efforts helped establish a framework in which weather could be studied as part of the natural order.
Limitations and Errors
Presocratic theories were constrained by the intellectual and technological conditions of the time. The early Greek philosophers who proposed these explanations worked without the observational tools, experimental methods, or accumulated scientific knowledge that later traditions would develop.
One major limitation was the absence of instruments for measuring atmospheric conditions. Devices such as barometers, thermometers, and hygrometers would not appear until many centuries later. As Lloyd notes in his study of early Greek science, Presocratic thinkers relied primarily on unaided observation and philosophical reasoning rather than on systematic measurement of natural phenomena.
A related constraint was the lack of experimental methodology. Presocratic explanations typically emerged from attempts to identify underlying principles governing the natural world rather than from repeated observation or controlled investigation. According to Kirk, Raven, and Schofield, many Presocratic theories were therefore constructed as broad cosmological models intended to explain the structure of nature as a whole rather than specific empirical processes.
Another limitation involved the simplified models of matter that dominated early Greek cosmology. Theories proposing that all substances derived from a single fundamental element, such as water in the case of Thales or air in the case of Anaximenes, could not account for the complexity of natural systems. Later thinkers would develop more elaborate elemental frameworks, including the four-element theory associated with Empedocles and later incorporated into Aristotelian natural philosophy.
Despite these limitations, Presocratic thought represents an important early stage in the development of natural explanations for weather and climate. As Lloyd emphasizes, the Presocratics helped establish the idea that natural phenomena could be understood through causal processes operating within the physical world. This intellectual shift provided an important foundation for later attempts to systematize the study of the atmosphere.
Historical Impact
Presocratic cosmology established an enduring tradition of explaining natural phenomena through underlying physical principles rather than mythological causes. By proposing that weather and other environmental processes could arise from transformations within fundamental substances such as water, air, or elemental matter, these early philosophers helped introduce a framework in which atmospheric events could be understood as part of the natural order.
Later philosophers expanded upon these ideas while developing more systematic accounts of the natural world. Aristotle in particular drew upon earlier Presocratic concepts when composing his treatise Meteorologica. According to Lloyd, Aristotle incorporated and reorganized many earlier discussions of elements, vapors, and atmospheric transformations into a structured explanation of weather, climate, and related terrestrial phenomena.
In Aristotle’s system, the interaction of the four elements (earth, water, air, and fire) produced processes such as evaporation, condensation, wind formation, and precipitation. Although this framework differed in important ways from earlier Presocratic models, it reflected the same broader effort to explain atmospheric behavior through natural mechanisms rather than divine intervention.
For many centuries, the Aristotelian framework, rooted in part in Presocratic cosmology, shaped the understanding of atmospheric phenomena throughout the Mediterranean and later European intellectual traditions. As Kirk, Raven, and Schofield observe, Presocratic ideas about elemental substances and natural causation formed part of the intellectual background against which later Greek natural philosophy developed.
While modern meteorology ultimately emerged through very different scientific methods, the Presocratics helped establish the foundational assumption that weather and climate are governed by processes operating within the natural world. This shift in explanatory perspective represents one of the earliest steps in the long historical development of atmospheric science.
Related Pages
Timeline
These thinkers represent some of the earliest attempts to interpret weather and environmental processes through natural causes rather than mythology.
Themes
Presocratic cosmology introduced foundational ideas about elemental substances and natural transformation that later shaped early atmospheric theory.
Later Developments
Later philosophers, particularly Aristotle, developed more structured explanations of atmospheric processes by expanding on earlier cosmological ideas.
Sources & Notes
Primary Sources
Aristotle. (350 BCE/1998). Meteorologica (E. W. Webster, Trans.). Internet Classics Archive, MIT.
https://classics.mit.edu/Aristotle/meteorology.html
Aristotle. (350 BCE/1924). Metaphysics (W. D. Ross, Trans.). The Internet Classics Archive.
https://classics.mit.edu/Aristotle/metaphysics.html
Diogenes Laertius. (3rd century CE/1925). Lives of the eminent philosophers (R. D. Hicks, Trans.). Perseus Digital Library.
https://scaife.perseus.org/library/urn:cts:greekLit:tlg0004.tlg001.perseus-eng2/
Secondary Sources
Kirk, G. S., Raven, J. E., & Schofield, M. (1983). The Presocratic philosophers: A critical history with a selection of texts (2nd ed.). Cambridge University Press. https://archive.org/details/presocraticphilo0000kirk_w5t7
Lloyd, G. E. R. (1970). Early Greek science: Thales to Aristotle. W. W. Norton & Company. https://archive.org/details/earlygreekscienc00gerl
Notes
1. Most writings attributed to the Presocratic philosophers survive only in fragments preserved by later authors such as Aristotle, Simplicius, and Diogenes Laertius. Modern reconstructions of Presocratic thought rely heavily on collections of these fragments, particularly the compilation presented by Kirk, Raven, and Schofield.
2. Much of what is known about early Greek natural philosophy comes from Aristotle’s discussions of earlier thinkers in works such as Metaphysics and Meteorologica. As a result, Aristotle often serves both as a philosophical commentator and as a historical source for earlier cosmological theories.
3. Greek philosophical terms such as hydōr (water), aēr (air), and apeiron (the indefinite or boundless) are sometimes preserved in transliteration because they carry specific philosophical meanings that are difficult to capture fully in English translation.
4. Presocratic thinkers did not write dedicated treatises on meteorology. Their explanations of atmospheric phenomena appear primarily within broader cosmological discussions about the nature of matter, elemental transformation, and the structure of the universe.
Revision Note
Last reviewed: March 2026