Ghaziabad falls in the northern parts of India in the National Capital Region, so the climate gets extreme in summers and winters. The best time to plan a visit is late October to Early March when the temperature is pleasant for sightseeing.
December and January are the winter months when the temperature records drastic fall, making it inconvenient for people not used to the extreme cold. Summers in Ghaziabad experiences uncomfortably high temperatures with regular passing of "loo" (hot dusty wind). So, it is best to avoid during this time.