I agree with the prior posts. You didn't mention if she's sick or had a different routine that day. If you don't think she's sick or teething, then perhaps she is just overtired? I know when our kids get overtired they fight going to sleep, are very restless and fussy and wake frequently.
Sometimes a growth spurt or change in schedule will make them sleepier than usual, so even tho you tried to put her down at her normal bedtime, she still could have already become overtired. One is a hard age because they are so busy! And now that the weather's nicer she may be playing more/harder and just be wearing herself out.
Perfect example, our little guy has already had TWO naps this morning. Don't know why, but when he's fussy and eye rubbing I put him down.
Watch for signs of being tired like yawning, eye rubbing, hair twirling, fussiness, etc. or whatever your daughter does when she's wearing out. You can either put her down for a nap then or if it's after dinner/close to bedtime, start dimming the lights, quieting down and do a shortened bedtime routine.
I hope it's as simple as that, and she's not sick.
Best wishes