Hi!
It is possible, but its unlikely that it would happen so early, unless your cycle is completely out of sync with your medications. Temperatures can be hard to interpret, so I always have my patients use ovulation predictors (similar to home pregnancy tests).
If your clomid is working, you should see a positive predictor on about day 11 or 12 and the ovulation should occur 24-48 hours after that.
Once your body is producing progesterone you should see the temperature up around 99 every day until the end of the cycle. I also like to confirm ovulation in my patients with a progesterone level on day 21 or so.
I hope this helps!
Dr B
I've just finished my first clomid cycle and I think I ovulated on day 9. My cycle was only 23 days. Does this mean the clomid didn't work properly? I had an ultrasound on day 11 which showed 3 giant follicles (more than 20mm) on the right and one on the left, and one that had already ruptured. But my temperature never went higher than 98°. Thanks for any help or advice you can give me.