Ungoliant, I think weather does have an effect upon "emotional" times. For a quick cheesy example, sunny-happy, rainy-sad. But, also you can look at the "seasons" and they too can be symbolic. Spring=Birth, new life, youth. Summer=Growing up, maturity. Fall=middle to old age. Winter=death.
If you look in the Appnedices, Gandalf dies in January, Boromir dies in February, both winter months. March 25th was the ultimate destruction of the Ring. If I'm not mistaken its during the late march month when we change from winter to spring. September (fall), we have the birthdays of Frodo and Bilbo, both considerable old. Frodo just reaching the age first time is 33, the age of "manhood" for the hobbits. Then when he departs from the Shire he's 50, and it was noted Hobbits find it odd how "active" Frodo was at this age. So not only weather, but seasons can be forms of symbolism, forms of a new birth, maturing, older days, then your death. Tolkien plays with this, and there are probably more examples but I think you get the point
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