Growing Beef Newsletter
June 2025, Volume 15, Issue 12
Summer heat reminders
Grant Dewell, ISU extension beef veterinarian
The long-range forecasts for the summer look like about normal temperatures (slight chance of higher than normal) and precipitation (slight chance below normal) throughout the summer. However, even though we are not expecting any heat waves this summer that can be devastating, heat stress can have a negative impact on beef cattle. Iowa cattle are mostly Bos taurus which are cold-adapted animals and experience heat stress when temperatures are about 75°F. Prepare now to provide some basic necessities for cattle when it gets above 90°.
Water is critical for cattle to be able to endure high temperatures. Their water consumption in the summer is about double their winter consumption rate, and during heat events, it can increase even more. Cattle cool themselves by sweating and panting which increases their water loss. Cattle need access to clean water to promote adequate intake. Your water supply systems should provide at least 1.5 gallons of water per hour per animal to meet their needs. Check flow rates now to make sure your cattle will have enough water when high temperatures occur.
Shade is the next important need that cattle have after water to stay cool. Due to their large body size, cattle absorb a lot of heat from solar radiation. Shade structures are commercially available that can provide relief for cattle during the summer. Plan for about 25 square feet per head of shade to allow all animals to comfortably get under the shade.
Finally, pay attention to the forecast and your cattle and provide additional relief (sprinklers, shift feeding times, etc.) if needed.
This monthly newsletter is free and provides timely information on topics that matter most to Iowa beef producers. You’re welcome to use information and articles from the newsletter - simply credit Iowa Beef Center.
