Does cold weather directly cause the common cold?
Cold weather does not directly cause the common cold; colds are caused by viruses, although seasonal patterns and some experimental findings may modestly affect transmission or susceptibility.
Where the claims stand
For generations, people associated catching colds with cold weather, wet hair, and winter exposure. Modern virology and epidemiology established that colds are caused by viruses — especially rhinoviruses — while research on whether cold exposure affects susceptibility has produced more limited and mixed findings. This retrospective story traces a familiar misconception and what the evidence actually establishes.
We'll only notify you when something material changes.
Additional information
Status
as of July 9, 2026The core virology is settled: the common cold is caused by viruses, not by temperature alone. Some research suggests cold air or chilling may influence susceptibility or symptoms in limited ways, but that does not restore the popular claim that cold weather directly causes colds.
Confidence — current state
Decades of infectious disease research established that rhinoviruses and other respiratory viruses cause colds. Seasonal increases in colds coincide with colder months largely because of indoor crowding, humidity, and transmission dynamics, not because low temperature itself creates colds. Some experiments have examined whether chilling affects immune response or symptom expression, but these findings do not support the straightforward folk claim that being cold gives you a cold.
This is our best read given the published evidence we have reviewed — not a claim of absolute truth.
Open questions
To what extent does cold dry air change nasal immune defenses or symptom severity?
Mechanistic studies continue to refine how environment interacts with infection.
How much do indoor crowding and school schedules explain winter seasonality?
Seasonal patterns likely reflect multiple overlapping factors.
What would change our mind
- Replicated experimental evidence showing cold exposure alone produces colds without viral infection.
- Discovery that major seasonal cold patterns occur independently of viral transmission.
Claims & evidence
Each claim is tracked separately — not a single verdict.The common cold is caused by respiratory viruses, most commonly rhinoviruses.
CorroboratedEvidence basisPeer-reviewed · independently corroborated- Official statementMarch 2, 2009Understanding a Common Cold Virus
NIH describes rhinovirus as the most common cause of colds and explains that antibiotics do not treat viral colds.
- Peer-reviewedPhysical interventions to interrupt or reduce the spread of respiratory viruses
Systematic review of respiratory virus transmission discusses viral causes of common colds and prevention measures.
Cold weather by itself does not directly cause colds without infection by a cold virus.
SupportedEvidence basisOfficial statement · single source- Official statementMarch 2, 2009Understanding a Common Cold Virus
NIH explains colds as viral infections rather than direct effects of cold exposure alone.
Higher winter cold incidence reflects multiple seasonal factors, including cooler temperatures that can impair nasal antiviral defenses and favor rhinovirus replication.
CorroboratedEvidence basisPeer-reviewed · independently corroborated- Peer-reviewedJanuary 5, 2015Foxman et al., Temperature-dependent innate defense against the common cold virus (2015)
Rhinovirus replicates more robustly at cooler nasal-cavity temperatures than at core body temperature, in part because host antiviral defenses are less effective in cooler airway cells.
- Peer-reviewedDecember 6, 2022Huang et al., Cold exposure impairs extracellular vesicle swarm-mediated nasal antiviral immunity (2022)
Cold exposure impaired TLR3-dependent nasal epithelial extracellular-vesicle antiviral responses, providing a mechanistic explanation for greater upper-respiratory infection risk in colder conditions.
What this doesn’t establish
Claims commonly associated with this story that the available evidence does not establish. Confirming a narrow fact here is not confirmation of the broader narrative around it. As such, these claims are not included in the claims bar above.
Getting chilled or going outside in cold weather directly causes colds without viral infection.
ContradictedEvidence basisPeer-reviewed · independently corroborated- Peer-reviewedOctober 3, 1968Douglas et al., Exposure to Cold Environment and Rhinovirus Common Cold (1968)
Experimental cold exposure in volunteers with rhinovirus infection showed no effect on host resistance that could account for the belief that chilling causes common colds.
- Official statementMarch 2, 2009Understanding a Common Cold Virus
Colds require infection by cold viruses; cold exposure alone is not described as the cause.
Because the folk claim about cold weather is wrong, environmental and seasonal factors play no role in cold transmission.
ContradictedEvidence basisPeer-reviewed · independently corroborated- Peer-reviewedJanuary 5, 2015Foxman et al., Temperature-dependent innate defense against the common cold virus (2015)
Cooler airway temperatures weaken innate antiviral defenses and favor rhinovirus replication — showing environment can shape infection risk without cold weather itself creating colds.
- Peer-reviewedDecember 6, 2022Huang et al., Cold exposure impairs extracellular vesicle swarm-mediated nasal antiviral immunity (2022)
Cold exposure impaired nasal antiviral extracellular-vesicle responses, offering a mechanistic role for temperature in seasonal upper-respiratory infection risk.
How we got here
6 updates · append-only- Stable for now
Evidence review: viruses cause colds; cold can shape risk
Colds require viral infection; experimental chilling does not establish that cold weather alone creates colds. Later mechanistic work shows cooler conditions can impair nasal antiviral defenses and favor rhinovirus replication, so environment still matters for transmission and susceptibility.
What changed
- Story status: developing stable-for-now (retrospective settled arc)
- New evidence
JACI study finds cold exposure impairs nasal antiviral EV response
Huang et al. found that cold exposure impaired TLR3-dependent nasal extracellular-vesicle antiviral immunity, providing a mechanistic link between colder conditions and upper-respiratory infection risk.
What changed
- Cold exposure and nasal immunity: 2015 temperature-defense evidence only 2022 JACI cold-exposure EV mechanism added
- New evidence
PNAS study links cooler airway temperature to weaker antiviral defense
Foxman et al. reported that rhinovirus replicates more robustly at cooler nasal-cavity temperatures, in part because innate antiviral responses are less effective in cooler airway cells.
What changed
- Temperature and susceptibility: Seasonality noted without mechanism on timeline 2015 PNAS mechanism for cooler-temperature replication
- New evidence
NIH summarizes rhinovirus science for the public
NIH published an accessible summary explaining that rhinoviruses cause most colds and that antibiotics do not treat viral colds.
What changed
- Public-facing evidence state: Folk belief still common Official NIH summary distinguishes viruses from cold exposure
- New evidence
NEJM experiment finds chilling does not cause colds
Douglas and colleagues experimentally exposed volunteers to cold rooms and cold water baths during rhinovirus infection and found no effect that could account for the belief that chilling causes common colds.
What changed
- Chilling-causes-colds claim: Folk belief untested experimentally on timeline 1968 NEJM volunteer study fails to support chilling effect
- New evidence
Rhinovirus identified as primary cause of common colds
Virology research established that rhinoviruses and other respiratory viruses cause colds, displacing earlier folk explanations focused on cold exposure alone.
What changed
- Cause of common cold: Widely attributed to cold weather and chilling Viral etiology established in medical literature
Suggest a source
Point us to a primary source or a publisher correction. Sign in to submit — every suggestion is reviewed by a human before anything changes.
Confidence last reviewed July 9, 2026. Updates are append-only; nothing here is edited silently.