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Weather extremes

How extreme does Sliven's weather get?

The hottest, coldest, wettest and snowiest days Sliven has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 34 years of daily weather observations (1991–present), from the Sliven station 2 km away. Updated through August 2025 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days Sliven has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
108°F Jul 5, 2000

That is about 22°F hotter than a normal July afternoon in Sliven (typical high near 86°F).

The three most extreme on record

1 108°F Jul 5, 2000
2 108°F Jul 24, 2007
3 106°F Jul 26, 2000
❄️ Coldest night
4°F Jan 26, 2010

About 26°F colder than a normal January night in Sliven (typical low near 30°F).

The three most extreme on record

1 4°F Jan 26, 2010
2 5°F Jan 23, 2006
3 5°F Jan 24, 2006
🌧️ Most rain in one day
10.55 in Jul 24, 1992

More rain in a single day than Sliven usually gets in the whole month of July (typical July total about 2.4 in).

The three most extreme on record

1 10.55 in Jul 24, 1992
2 8.43 in Jul 19, 2003
3 5.51 in Jun 20, 1994

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.

-10°10°30°50°70°90°110°130° all-time high 108°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Sliven's record heat sits well above even a hot day for the season — July's 108°F is about 22°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

In a normal year, Sliven's warmest days reach the high 80s°F and its coldest nights drop to the low 30s°F. But across the record it has gone as high as 108°F and as low as 4°F. A single day has delivered over 11 inches of rain. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.
Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 29 years of daily observations at Sliven, a weather station, about 2 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →