How extreme does Saint Peters's weather get?

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

Based on 46 years of daily weather observations (1980–present), from the St Peters 2 Se station 5 km away. Updated through May 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 Saint Peters has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day

107°F Aug 30, 1984

That is about 20°F hotter than a normal August afternoon in Saint Peters (typical high near 87°F).

The three most extreme on record

1 107°F Aug 30, 1984

2 106°F Jul 16, 1980

3 106°F Jul 20, 1980

❄️ Coldest night

-20°F Jan 21, 1985

About 41°F colder than a normal January night in Saint Peters (typical low near 21°F).

The three most extreme on record

1 -20°F Jan 21, 1985

2 -18°F Dec 22, 1989

3 -18°F Dec 23, 1989

🌧️ Most rain in one day

10.88 in Jul 26, 2022

More rain in a single day than Saint Peters usually gets in the whole month of July (typical July total about 4.2 in).

The three most extreme on record

1 10.88 in Jul 26, 2022recent

2 6.59 in Dec 27, 2015

3 5.34 in Jul 7, 1987

⛄ Most snow in one day

11.5 in Mar 25, 2013

Close to a whole typical March's snow in one day (Saint Peters averages about 2 in across the month).

The three most extreme on record

1 11.5 in Mar 25, 2013

2 11.0 in Jan 31, 1982

3 11.0 in Jan 6, 2014

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.

normal range of daily temperatureshottest ever recordedcoldest ever recorded

Saint Peters's record heat sits well above even a hot day for the season — August's 107°F is about 20°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, Saint Peters's warmest days reach the high 80s°F and its coldest nights drop to the low 20s°F. But across the record it has gone as high as 107°F and as low as −20°F. A single day has delivered over 11 inches of rain or close to 12 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 ST Charles 7 Ssw (NOAA GHCN station USC00237398), about 16 km from the city centre.

How we build these numbers →

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