Custom Search     Monsanto Number Fifteen Lake     How did that trip work out for you? Has anyone else been down to that lake? I would like to have more information on this lake if anyone has any. Says Kristen Dalton Going today to check out the lake. Has anyone fish this lake? 05.24/08 Says Laura Miller Throughout the warm days of summer here at Monsanto Number Fifteen Lake, high temperatures frequently reach the 80's, and during summer nights temperatures are in the 60's. The cold days of the wintertime     come with highs in the 40's; overnight lows in the 20's for Monsanto Number Fifteen Lake. Monsanto Number Fifteen Lake is a wet site that gets lots of precipitation.            Map Detailed Map Weather Local weather forecast