(snip) From what I've seen after using iOS 7 for the past 3 months, it seems like it will say the current temperature in the morning and in the evenings, but during the time when the temperature is near the high for the day (which it does say usually in the description), it won't.
This does seem to be true. I noticed the current temperature listed yesterday evening and this morning, but gone now. I guess it doesn't show when the temperature is close to the high as you surmised.
Huh...I guess I hope they add the option to always show current temp. I can see some people liking it this way for sure but I'd definitely prefer to see it even if it's the same as the high.