unseasonal
Out of place
Unseasonal describes weather or conditions that are unusual for the time of year: unseasonal warmth in February, an unseasonal frost destroyed the early blooms.
The word emphasizes deviation from what's typical for a particular season.
Unseasonable means the same thing and is slightly more common.
Occurring too soon
- prematureOccurring before expected
- belatedArriving after expected
- ill-timedOccurring at wrong moment
- mistimedDone at wrong moment
inopportune · early · late · irregular · atypical · anomalous · unexpected · unusual
Prolonged abnormally high temperatures
- cold snapBrief period of bitter chill
- frostThin ice coating
- thawReturn to liquid
- droughtProlonged water scarcity
flooding · storm · precipitation · temperature shift · extreme weather · anomaly · warm spell · Indian summer
Gathering mature crops
- bloomFlower or flourishing state
- frost damageHarm from ice formation
- crop failureWhen fields yield nothing
- germinationSeed's initial growth phase
yield · fruit set · bolting · pollination · budding · ripening · stunted growth · greenhouse
untimely
Occurring too soon
mistimed · inopportune · early · late · irregular · atypical · anomalous · unexpected · unusual · aberrant
heatwave
Prolonged abnormally high temperatures
drought · flooding · storm · precipitation · temperature shift · extreme weather · anomaly · warm spell · Indian summer · weather pattern
harvest
Gathering mature crops
- bloomFlower or flourishing state
- frost damageHarm from ice formation
- crop failureWhen fields yield nothing
germination · yield · fruit set · bolting · pollination · budding · ripening · stunted growth · greenhouse · irrigation
migration
Movement to new territory
- hibernationProlonged winter dormancy
- breedingReproductive cultivation of organisms
- floweringProducing reproductive structures
fruiting · phenology · foliage · shedding · spawning · nesting · dormancy
unseasonalseasonal
Recurring at fixed intervals
seasonable · in season · timely · well-timed · on schedule