Hamsters have low tolerance for low temperatures. Below is a detailed analysis of how low temperatures affect them:
1. Critical Low-Temperature Thresholds
Dangerous temperatures: When the ambient temperature drops below 15°C (59°F), hamsters may show signs of discomfort such as slowed metabolism and reduced activity. If temperatures remain below 7–8°C (44.6–46.4°F) for an extended period, hamsters will enter a hibernation-like state called "torpor." This is characterized by stiff bodies and weak breathing, and prolonged torpor can lead to organ failure or death.
Greater sensitivity in young hamsters: Newborn hamsters require a higher temperature range (28–30°C / 82.4–86°F). Their survival rate drops significantly in low-temperature environments.
2. Signs of Low-Temperature Stress
Behavioral abnormalities: Curling into a tight ball, reducing movement, and hiding deep in bedding.
Physiological responses: When body temperature drops below 35°C (95°F), hamsters may go into shock and require emergency rewarming.
3. Cold-Proof Measures
Thicken bedding: Add more insulating materials like wood shavings or cotton in winter. Hamsters will dig tunnels in the bedding to keep warm on their own.
Auxiliary equipment: Use a ceramic heat lamp or a pet heating pad. Ensure a safe distance from the hamster to prevent burns.
Stabilize the environment: Avoid temperature fluctuations of more than 10°C (18°F) between day and night. Keep the cage away from vents and cold sources (e.g., windows, air conditioners).
4. Comparison with Other Temperature Ranges
Ideal temperature range: The most comfortable temperature for hamsters is 18–26°C (64.4–78.8°F).
High-temperature risks: Temperatures above 28°C (82.4°F) increase the risk of heatstroke. This requires separate preventive measures from those used for low temperatures.
If you notice signs of low-temperature stress in your hamster, rewarm it slowly (no more than 3°C / 5.4°F per hour) and closely monitor its recovery.