If she is still laying eggs, she is not broody. When they go truly broody, they quit laying. That's because an egg that is laid after she starts incubating the others won't hatch. She will have to take the chicks off the nest for food and water before that egg has enough time to hatch.
With the temperatures you mentioned, if she really went broody, I'd give her eggs. It's not the best time of year for hatching and raising chicks, but she should be able to handle it.
With the temperatures you mentioned, if she really went broody, I'd give her eggs. It's not the best time of year for hatching and raising chicks, but she should be able to handle it.