Yeah, it is perfectly ok to go. You can enjoy a lot there. If you are going to Jaisalmer, don't forget to try camel safari and desert camping. Happy travelling !!
We visited Jaisalmer on 26th November. It was perfect weather at that time. We also managed an economical trip as it was not rush season. The rush season starts from 15th December. So, my advice, anytime before 15th December will be good on your pocket. Weather will remain pleasant frm the start of November itself.
November to March: These months constitute the winter season in Jaisalmer. It is also an ideal time to visit Jaisalmer. Sightseeing and other outdoor activities like camel ride, desert safari are more enjoyable during this time as the maximum temperature does not go beyond 24 degree Celsius.