Henderson averages 134 days a year above 90°F, with February the wettest month at 0.8 in of normal rain. The hottest day on record was 120°F on Jul 7, 2024; the coldest, 11°F on Dec 23, 1990. The single biggest 24-hour rain event recorded was 1.65 in on Aug 22, 2012.
Climate and Average Weather Year Round in Henderson
Year-round temperature
In Henderson, the warmest months are June through September, with average daily highs between 95°F and 105°F. The coldest stretch runs December through February, with highs between 57°F and 63°F and overnight lows reaching 40°F.
Rainfall through the year
Rainfall in Henderson averages 0.3 in per month over the long run. February is the wettest at 0.8 in, while June is the driest at 0.0 in.
Days at 90 °F or hotter
Henderson averages 134.0 days per year at 90 °F or hotter. The hottest year on record saw 158 such days (2020); the coolest just 32 (2026).
Precipitation this year
As of May 28, Henderson has received 0.5 in of precipitation this year — 76% below the long-term normal for this point in the year (2.0 in).