How extreme does Canyon Lake's weather get?

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

Based on 50+ years of daily weather observations (1971–present), from the San Marcos station 30 km away. Updated through April 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 Canyon Lake has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day

111°F Sep 5, 2000

That is about 20°F hotter than a normal September afternoon in Canyon Lake (typical high near 91°F).

The three most extreme on record

1 111°F Sep 5, 2000

2 110°F Sep 4, 2000

3 109°F Jun 15, 1998

❄️ Coldest night

0°F Mar 31, 1999

About 50°F colder than a normal March night in Canyon Lake (typical low near 50°F).

The three most extreme on record

1 0°F Mar 31, 1999

2 4°F Dec 22, 1989

3 7°F Dec 25, 1983

🌧️ Most rain in one day

15.78 in Oct 17, 1998

More rain in a single day than Canyon Lake usually gets in the whole month of October (typical October total about 4.4 in).

The three most extreme on record

1 15.78 in Oct 17, 1998

2 13.98 in Jun 14, 1981

3 9.07 in Nov 24, 1985

⛄ Most snow in one day

1.5 in Feb 9, 1973

The three most extreme on record

1 1.5 in Feb 9, 1973

2 1.5 in Feb 14, 2004

3 1.0 in Dec 8, 2017

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

Canyon Lake's record heat sits well above even a hot day for the season — September's 111°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, Canyon Lake's warmest days reach the high 90s°F and its coldest nights drop to the high 30s°F. But across the record it has gone as high as 111°F and as low as 0°F. A single day has delivered over 16 inches of rain or close to 2 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 San Marcos (NOAA GHCN station USC00417983), about 30 km from the city centre.

How we build these numbers →

← Canyon Lake city detail