We're having a picnic tomorrow. Why don't you come with us?
I'd like to, but I think it's going to rain. The weatherman says so.
I don't think he is right. It hasn't rained for a week and it isn't cloudy, either.
But he is usually correct in his weather news.
The temperature is 32t this afternoon. I'm sure we'll have fine weather for our picnic.
Well, I'll go, but I'll take my umbrella with me.