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Weather extremes

How extreme does Kennesaw's weather get?

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

Based on 28 years of daily weather observations (1998–present), from the Atlanta Dekalb Peachtree Ap station 33 km away. Updated through June 2026 — 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 Kennesaw has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
105°F Jun 30, 2012

That is about 19°F hotter than a normal June afternoon in Kennesaw (typical high near 86°F).

The three most extreme on record

1 105°F Jun 30, 2012
2 105°F Jul 1, 2012
3 103°F Jun 29, 2012
❄️ Coldest night
-57°F Jun 7, 2007

About 123°F colder than a normal June night in Kennesaw (typical low near 66°F).

The three most extreme on record

1 -57°F Jun 7, 2007
2 5°F Jan 7, 2014
3 6°F Jan 30, 2014
🌧️ Most rain in one day
5.87 in Sep 21, 2009

More rain in a single day than Kennesaw usually gets in the whole month of September (typical September total about 4.1 in).

The three most extreme on record

1 5.87 in Sep 21, 2009
2 5.43 in Sep 26, 2024
3 5.35 in Sep 16, 2004
Most snow in one day
1.0 in Feb 8, 2020

Top recorded days

1 1.0 in Feb 8, 2020

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.

-70°-50°-30°-10°10°30°50°70°90°110°130° all-time high 105°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Kennesaw's record heat sits well above even a hot day for the season — June's 105°F is about 19°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, Kennesaw'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 105°F and as low as −57°F. A single day has delivered over 6 inches of rain or close to 1 inches of snow. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.
Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Mableton 1 N (NOAA GHCN station USC00095404), about 19 km from the city centre.

How we build these numbers →