Funny you say this, I did my update this morning and was bugged by the weather on the lock screen as well. I have Weather & clock widget and it turns out the setting was within the app itself, not the phone settings. For me I launched the app, opened settings and it was called Show Temperature in Status Bar. So you will need to launch both accuweather and 1weather and check the settings and turn off temp in status bar/lock screen display or something along those lines. I thought this selection would have been in phone settings-device-lock screen-show information-weather and simply uncheck all the boxes but this did nothing.