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Weather extremes
How extreme does Semnan's weather get?
The hottest, coldest, wettest and snowiest days Semnan has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.
The four kinds of extreme
The hottest, coldest, wettest and snowiest single days Semnan has recorded — each shown against what a normal day that time of year looks like.
That is about 11°F hotter than a normal July afternoon in Semnan (typical high near 101°F).
The three most extreme on record
About 23°F colder than a normal January night in Semnan (typical low near 32°F).
The three most extreme on record
More rain in a single day than Semnan usually gets in the whole month of December (typical December total about 0.8 in).
The three most extreme on record
How hot and cold it gets, month by month
The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.
Semnan's record heat sits well above even a hot day for the season — July's 112°F is about 11°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.
In plain terms
Methodology & sources
Temperature — modelled for this location from ERA5-Land reanalysis, a ~9 km global grid, because no long-record weather station is close enough to use.
Precipitation — 1991–2020 normals computed from 17 years of daily observations at Semnan, a weather station, about 9 km from the city centre. The underlying daily records come from NOAA's global station network.