When it is raining, it is generally recommended to adjust your driving behavior to ensure safety on the road. While there is no hard and fast rule that mandates driving exactly ten miles per hour below the speed limit, it is advisable to drive at a reduced speed that is appropriate for the conditions.
Driving at a slower speed in wet conditions can help compensate for reduced traction and increased stopping distances. It is important to adjust your speed according to factors such as visibility, road conditions, and the behavior of other drivers.
Different areas and jurisdictions may have specific laws or guidelines regarding speed limits during adverse weather conditions. It is always a good idea to familiarize yourself with local regulations and recommendations. Additionally, using your best judgment, being cautious, and maintaining a safe following distance can help ensure your safety and the safety of others on the road during rainy weather.