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Upper San Juan SNOTEL

No snow sat on the pillow at Upper San Juan at the start of October 4, 2026. The NRCS median first snow is November 1, and the median peak is 29.7 in around April 9.

as of

All values are from the start of the day, midnight Pacific Standard Time

Last 8 days

Start-of-day readings for Upper San Juan, last 8 days.
DateSWEMedianPercentDepthPrecip since Oct 1
Oct 40.0 inches0.0 inches0 inches
Oct 30.0 inches0.0 inches0 inches0.0 inches
Oct 20.0 inches0.0 inches0 inches
Oct 10.1 inches0.0 inches0 inches0.0 inches
Sep 300.1 inches0.0 inches0 inches49.7 inches
Sep 290.1 inches0.0 inches0 inches49.4 inches
Sep 280.1 inches0.0 inches1 inches47.1 inches
Sep 270.0 inches0.0 inches0 inches47.0 inches

The Natural Resources Conservation Service (USDA) created the figures on this page, which are works of the US government and therefore have no copyright under 17 U.S.C. 105. The notice that 17 U.S.C. 403 requires appears in this sentence. Neither NRCS nor USDA endorses or is affiliated with WeatherTotals. See: Data sources and attribution.

Records at Upper San Juan

Record values for Upper San Juan, from daily snowpack history.
Highest SWE on record64.7 inches, April 19, 1979
Deepest snow on record139 inches, March 14, 2019
Biggest season peak64.7 in, 1978-79 season, on April 19, 1979
Smallest season peak11.2 in, 2001-02 season, on March 25, 2002
Last season's peak13.4 in, 2025-26 season, on March 7, 2026

48 complete water years in the record, daily SWE since October 1, 1978

Station details

Elevation10,140 ft
CountyMineral
Position37.4856, -106.8353
Record startsOctober 1, 1978
Median peak SWE29.7 in around April 9
Median first snowNovember 1
Median melt-outMay 31
NRCS station ID840:CO:SNTL

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