How extreme does West Linn's weather get?

The hottest, coldest, wettest and snowiest days West Linn 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 Oregon City station 1 km away. Updated through September 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 West Linn has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day

114°F Jun 28, 2021

That is about 38°F hotter than a normal June afternoon in West Linn (typical high near 76°F).

The three most extreme on record

1 114°F Jun 28, 2021recent

2 111°F Jun 27, 2021

3 108°F Jul 29, 2009

❄️ Coldest night

-99°F Oct 16, 2020

About 146°F colder than a normal October night in West Linn (typical low near 47°F).

The three most extreme on record

1 -99°F Oct 16, 2020

2 6°F Dec 21, 1990

3 7°F Dec 8, 1972

🌧️ Most rain in one day

5.00 in Mar 20, 2017

More rain in a single day than West Linn usually gets in the whole month of March (typical March total about 4.8 in).

The three most extreme on record

1 5.00 in Mar 20, 2017

2 3.35 in Oct 27, 1994

3 3.30 in Nov 19, 1996

⛄ Most snow in one day

10.0 in Feb 19, 1993

The three most extreme on record

1 10.0 in Feb 19, 1993

2 10.0 in Feb 21, 1993

3 6.0 in Dec 22, 2008

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

West Linn's record heat sits well above even a hot day for the season — June's 114°F is about 38°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, West Linn's warmest days reach the mid-80s°F and its coldest nights drop to the mid-30s°F. But across the record it has gone as high as 114°F and as low as −99°F. A single day has delivered over 5 inches of rain or close to 10 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 Portland Intl AP (NOAA GHCN station USW00024229), about 26 km from the city centre.

How we build these numbers →

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