Mammoth Lakes Rs Weather Records (USC00045280)

Record envelope, standing records and threshold days for Mammoth Lakes Rs (USC00045280), California, United States, with 30 years of record.

Key Facts for Mammoth Lakes Rs

Mammoth Lakes Rs (USC00045280) is a weather station in California, United States at 37.65 latitude and -118.96 longitude, 2,379 m (7,804 ft) above sea level.
The station reports from 1993 to 2022, 30 years of record.
1,464 records set at Mammoth Lakes Rs still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: California, United States, 37.65 latitude, -118.96 longitude.
Elevation: 2,379 m (7,804 ft).
Period of record: 1993 to 2022, 30 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Mammoth Lakes Rs. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Mammoth Lakes Rs, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	19.4 C (66.9 F)	-26.7 C (-16.1 F)	n/a	n/a
Feb	18.9 C (66.0 F)	-23.9 C (-11.0 F)	n/a	n/a
Mar	20.0 C (68.0 F)	-22.2 C (-8.0 F)	n/a	n/a
Apr	22.8 C (73.0 F)	-18.3 C (-0.9 F)	n/a	n/a
May	27.2 C (81.0 F)	-10.6 C (12.9 F)	n/a	n/a
Jun	30.0 C (86.0 F)	-8.3 C (17.1 F)	n/a	n/a
Jul	32.8 C (91.0 F)	-3.9 C (25.0 F)	n/a	n/a
Aug	31.1 C (88.0 F)	-1.1 C (30.0 F)	n/a	n/a
Sep	28.3 C (82.9 F)	-6.1 C (21.0 F)	n/a	n/a
Oct	26.7 C (80.1 F)	-16.7 C (1.9 F)	n/a	n/a
Nov	21.1 C (70.0 F)	-22.2 C (-8.0 F)	n/a	n/a
Dec	17.8 C (64.0 F)	-24.4 C (-11.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Mammoth Lakes Rs still stand. 2015 holds the most, with 90.

Standing records at Mammoth Lakes Rs by the year they were set
Year set	Standing records
1993	5
1994	49
1995	66
1996	69
1997	48
1998	71
1999	64
2000	48
2001	63
2002	62
2003	57
2004	55
2005	32
2006	49
2007	60
2008	47
2009	41
2010	53
2011	50
2012	61
2013	50
2014	81
2015	90
2016	61
2017	36
2018	53
2019	35
2020	5
2021	3

Wettest Day of Each Month

Dec: 113.8 mm (4.5 in)

The wettest day on record for each calendar month at Mammoth Lakes Rs. The most was 113.8 mm (4.5 in) on 19 December 2010.

Record daily precipitation for each month at Mammoth Lakes Rs
Month	Record daily precipitation (mm)	Date
Jan	66.5 mm (2.6 in)	5 January 2008
Feb	69.1 mm (2.7 in)	20 February 1996
Mar	84.6 mm (3.3 in)	11 March 1995
Apr	58.4 mm (2.3 in)	4 April 2006
May	83.8 mm (3.3 in)	23 May 2019
Jun	22.9 mm (0.9 in)	12 June 2016
Jul	26.9 mm (1.1 in)	9 July 2015
Aug	38.1 mm (1.5 in)	7 August 1998
Sep	33.8 mm (1.3 in)	23 September 1999
Oct	102.9 mm (4.1 in)	14 October 2009
Nov	78.0 mm (3.1 in)	8 November 2002
Dec	113.8 mm (4.5 in)	19 December 2010

Period of Record Coverage

1993 to 2021

29 years of record at Mammoth Lakes Rs, 1993 to 2021. 9 years have data for under 90 percent of days and are left out of rankings: 1993, 1994, 2000, 2001, 2017, 2018, 2019, 2020 and others.

Days with data per year at Mammoth Lakes Rs
Year	Days with data	Share of year	Complete
1993	27	7%	No
1994	324	89%	No
1995	354	97%	Yes
1996	360	98%	Yes
1997	330	90%	Yes
1998	331	91%	Yes
1999	355	97%	Yes
2000	328	90%	No
2001	324	89%	No
2002	359	98%	Yes
2003	360	99%	Yes
2004	363	99%	Yes
2005	353	97%	Yes
2006	349	96%	Yes
2007	355	97%	Yes
2008	353	96%	Yes
2009	359	98%	Yes
2010	363	99%	Yes
2011	364	100%	Yes
2012	356	97%	Yes
2013	344	94%	Yes
2014	359	98%	Yes
2015	365	100%	Yes
2016	335	92%	Yes
2017	168	46%	No
2018	313	86%	No
2019	189	52%	No
2020	86	23%	No
2021	11	3%	No

Latest Records

No records were set at this station in the latest data.

Climate Trend

13 complete years, 1995 to 2015

One stripe for each of 13 complete years at Mammoth Lakes Rs, 1995 to 2015. Blue stripes are years cooler than the station's own mean of 6.4 C (43.6 F); red stripes are warmer. The coolest year was 2010, at 5.4 C (41.7 F), and the warmest was 2014, at 8.4 C (47.0 F). The strongest colour marks a difference of 2.0 C (3.6 F).

Annual mean temperature at Mammoth Lakes Rs as warming stripes, 1995 to 2015
Year	Annual mean temperature	Difference from the station mean
1995	5.9 C	-0.51 C
1996	6.6 C	+0.18 C
1999	5.9 C	-0.53 C
2002	6.0 C	-0.44 C
2003	6.4 C	-0.07 C
2004	5.7 C	-0.73 C
2005	5.6 C	-0.88 C
2007	6.8 C	+0.31 C
2009	6.0 C	-0.48 C
2010	5.4 C	-1.07 C
2012	7.6 C	+1.16 C
2014	8.4 C	+1.90 C
2015	7.6 C	+1.14 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1993 to 2022

Yearly extremes at Mammoth Lakes Rs: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	32.8 C (91.0 F)	2002	30.0 C (86.0 F)	29
Coldest night (TNn)	-26.7 C (-16.1 F)	2007	-20.6 C (-5.1 F)	29
Wettest day (Rx1day)	113.8 mm (4.5 in)	2010	54.6 mm (2.1 in)	28
Wettest five days (Rx5day)	253.9 mm (10.0 in)	2010	91.3 mm (3.6 in)	28
Longest dry spell (CDD)	110 days	1994	43 days	28

Hottest day (TXx)

The hottest day of the year at Mammoth Lakes Rs, 1993 to 2022. The record is 32.8 C (91.0 F) in 2002, marked on the chart; the median year is 30.0 C (86.0 F).

Hottest day (TXx) at Mammoth Lakes Rs by year
Year	Hottest day (TXx)
1993	15.0 C (59.0 F)
1994	30.0 C (86.0 F)
1995	28.3 C (82.9 F)
1996	30.0 C (86.0 F)
1997	30.6 C (87.1 F)
1998	31.1 C (88.0 F)
1999	31.1 C (88.0 F)
2000	31.1 C (88.0 F)
2001	29.4 C (84.9 F)
2002	32.8 C (91.0 F)
2003	32.2 C (90.0 F)
2004	29.4 C (84.9 F)
2005	30.0 C (86.0 F)
2006	30.6 C (87.1 F)
2007	32.2 C (90.0 F)
2008	31.1 C (88.0 F)
2009	29.4 C (84.9 F)
2010	29.4 C (84.9 F)
2011	28.3 C (82.9 F)
2012	29.4 C (84.9 F)
2013	32.2 C (90.0 F)
2014	29.4 C (84.9 F)
2015	29.4 C (84.9 F)
2016	31.7 C (89.1 F)
2017	30.0 C (86.0 F)
2018	30.6 C (87.1 F)
2019	28.3 C (82.9 F)
2020	21.7 C (71.1 F)
2021	19.4 C (66.9 F)
2022	n/a

Coldest night (TNn)

The coldest night of the year at Mammoth Lakes Rs, 1993 to 2022. The record is -26.7 C (-16.1 F) in 2007, marked on the chart; the median year is -20.6 C (-5.1 F).

Coldest night (TNn) at Mammoth Lakes Rs by year
Year	Coldest night (TNn)
1993	-20.6 C (-5.1 F)
1994	-22.2 C (-8.0 F)
1995	-20.0 C (-4.0 F)
1996	-22.2 C (-8.0 F)
1997	-22.8 C (-9.0 F)
1998	-24.4 C (-11.9 F)
1999	-20.6 C (-5.1 F)
2000	-17.8 C (0.0 F)
2001	-21.7 C (-7.1 F)
2002	-24.4 C (-11.9 F)
2003	-20.6 C (-5.1 F)
2004	-23.3 C (-9.9 F)
2005	-18.3 C (-0.9 F)
2006	-20.0 C (-4.0 F)
2007	-26.7 C (-16.1 F)
2008	-19.4 C (-2.9 F)
2009	-21.7 C (-7.1 F)
2010	-21.7 C (-7.1 F)
2011	-20.6 C (-5.1 F)
2012	-20.6 C (-5.1 F)
2013	-22.2 C (-8.0 F)
2014	-15.6 C (3.9 F)
2015	-22.8 C (-9.0 F)
2016	-23.3 C (-9.9 F)
2017	-17.8 C (0.0 F)
2018	-23.9 C (-11.0 F)
2019	-20.6 C (-5.1 F)
2020	-14.4 C (6.1 F)
2021	-10.0 C (14.0 F)
2022	n/a

Wettest day (Rx1day)

The wettest day of the year at Mammoth Lakes Rs, 1993 to 2022. The record is 113.8 mm (4.5 in) in 2010, marked on the chart; the median year is 54.6 mm (2.1 in).

Wettest day (Rx1day) at Mammoth Lakes Rs by year
Year	Wettest day (Rx1day)
1993	n/a
1994	46.2 mm (1.8 in)
1995	84.6 mm (3.3 in)
1996	69.1 mm (2.7 in)
1997	59.2 mm (2.3 in)
1998	55.9 mm (2.2 in)
1999	33.8 mm (1.3 in)
2000	38.1 mm (1.5 in)
2001	57.2 mm (2.3 in)
2002	78.0 mm (3.1 in)
2003	27.9 mm (1.1 in)
2004	78.7 mm (3.1 in)
2005	51.6 mm (2.0 in)
2006	58.4 mm (2.3 in)
2007	46.2 mm (1.8 in)
2008	66.5 mm (2.6 in)
2009	102.9 mm (4.1 in)
2010	113.8 mm (4.5 in)
2011	26.7 mm (1.1 in)
2012	54.1 mm (2.1 in)
2013	14.0 mm (0.6 in)
2014	26.9 mm (1.1 in)
2015	38.1 mm (1.5 in)
2016	52.8 mm (2.1 in)
2017	54.6 mm (2.1 in)
2018	74.9 mm (2.9 in)
2019	83.8 mm (3.3 in)
2020	13.5 mm (0.5 in)
2021	54.6 mm (2.1 in)
2022	n/a

Wettest five days (Rx5day)

The wettest five days of the year at Mammoth Lakes Rs, 1993 to 2022. The record is 253.9 mm (10.0 in) in 2010, marked on the chart; the median year is 91.3 mm (3.6 in).

Wettest five days (Rx5day) at Mammoth Lakes Rs by year
Year	Wettest five days (Rx5day)
1993	n/a
1994	85.6 mm (3.4 in)
1995	159.0 mm (6.3 in)
1996	131.3 mm (5.2 in)
1997	161.3 mm (6.4 in)
1998	103.4 mm (4.1 in)
1999	61.7 mm (2.4 in)
2000	77.8 mm (3.1 in)
2001	100.0 mm (3.9 in)
2002	151.4 mm (6.0 in)
2003	59.4 mm (2.3 in)
2004	131.2 mm (5.2 in)
2005	64.6 mm (2.5 in)
2006	93.5 mm (3.7 in)
2007	58.7 mm (2.3 in)
2008	106.9 mm (4.2 in)
2009	102.9 mm (4.1 in)
2010	253.9 mm (10.0 in)
2011	76.2 mm (3.0 in)
2012	94.8 mm (3.7 in)
2013	25.7 mm (1.0 in)
2014	50.8 mm (2.0 in)
2015	55.1 mm (2.2 in)
2016	84.3 mm (3.3 in)
2017	89.1 mm (3.5 in)
2018	133.4 mm (5.3 in)
2019	112.4 mm (4.4 in)
2020	13.7 mm (0.5 in)
2021	14.0 mm (0.6 in)
2022	n/a

Longest dry spell (CDD)

The longest dry spell of the year at Mammoth Lakes Rs, 1993 to 2022. The record is 110 days in 1994, marked on the chart; the median year is 43 days.

Longest dry spell (CDD) at Mammoth Lakes Rs by year
Year	Longest dry spell (CDD)
1993	n/a
1994	110 days
1995	51 days
1996	54 days
1997	36 days
1998	54 days
1999	37 days
2000	40 days
2001	75 days
2002	51 days
2003	65 days
2004	37 days
2005	35 days
2006	64 days
2007	35 days
2008	105 days
2009	40 days
2010	43 days
2011	39 days
2012	47 days
2013	29 days
2014	48 days
2015	43 days
2016	69 days
2017	35 days
2018	69 days
2019	25 days
2020	21 days
2021	22 days
2022	n/a

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Download the Data

Data for Mammoth Lakes Rs standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mammoth Lakes Rs threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).