Mt Shasta Weather Records (USW00024215)

Record envelope, standing records and threshold days for Mt Shasta (USW00024215), California, United States, with 31 years of record.

Key Facts for Mt Shasta

Mt Shasta (USW00024215) is a weather station in California, United States at 41.31 latitude and -122.32 longitude, 1,083 m (3,553 ft) above sea level.
The station reports from 1996 to 2026, 31 years of record.
1,464 records set at Mt Shasta 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, 41.31 latitude, -122.32 longitude.
Elevation: 1,083 m (3,553 ft).
Period of record: 1996 to 2026, 31 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

31 days at or beyond a record

The band shows the record high and record low for each calendar day at Mt Shasta. The lines show the 2026 daily maximum and minimum. 31 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Mt Shasta, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	20.0 C (68.0 F)	-16.0 C (3.2 F)	13.9 C (57.0 F)	-9.9 C (14.2 F)
Feb	21.7 C (71.1 F)	-14.3 C (6.3 F)	21.7 C (71.1 F)	-14.3 C (6.3 F)
Mar	25.0 C (77.0 F)	-9.4 C (15.1 F)	25.0 C (77.0 F)	-2.7 C (27.1 F)
Apr	30.6 C (87.1 F)	-7.7 C (18.1 F)	26.7 C (80.1 F)	0.0 C (32.0 F)
May	35.0 C (95.0 F)	-5.5 C (22.1 F)	33.3 C (91.9 F)	2.8 C (37.0 F)
Jun	39.4 C (102.9 F)	-0.5 C (31.1 F)	34.4 C (93.9 F)	3.9 C (39.0 F)
Jul	41.1 C (106.0 F)	2.8 C (37.0 F)	36.7 C (98.1 F)	7.2 C (45.0 F)
Aug	38.9 C (102.0 F)	2.8 C (37.0 F)	37.2 C (99.0 F)	5.6 C (42.1 F)
Sep	39.4 C (102.9 F)	-1.1 C (30.0 F)	32.8 C (91.0 F)	5.6 C (42.1 F)
Oct	31.7 C (89.1 F)	-8.2 C (17.2 F)	23.9 C (75.0 F)	-1.1 C (30.0 F)
Nov	25.6 C (78.1 F)	-11.6 C (11.1 F)	21.7 C (71.1 F)	-3.9 C (25.0 F)
Dec	18.9 C (66.0 F)	-17.8 C (0.0 F)	18.9 C (66.0 F)	-5.0 C (23.0 F)

Which Years Hold Standing Records

1,464 standing records

1,464 records at Mt Shasta still stand. 1999 holds the most, with 77.

Standing records at Mt Shasta by the year they were set
Year set	Standing records
1996	28
1997	45
1998	47
1999	77
2000	55
2001	33
2002	53
2003	55
2004	31
2005	43
2006	48
2007	43
2008	66
2009	40
2010	50
2011	52
2012	52
2013	62
2014	55
2015	66
2016	50
2017	55
2018	31
2019	48
2020	42
2021	47
2022	52
2023	47
2024	45
2025	46

Wettest Day of Each Month

Feb: 123.7 mm (4.9 in)

The wettest day on record for each calendar month at Mt Shasta. The most was 123.7 mm (4.9 in) on 6 February 2015.

Record daily precipitation for each month at Mt Shasta
Month	Record daily precipitation (mm)	Date
Jan	74.4 mm (2.9 in)	8 January 2017
Feb	123.7 mm (4.9 in)	6 February 2015
Mar	84.6 mm (3.3 in)	1 March 2009
Apr	85.6 mm (3.4 in)	6 April 2017
May	54.4 mm (2.1 in)	15 May 2019
Jun	47.5 mm (1.9 in)	17 June 2005
Jul	29.7 mm (1.2 in)	5 July 2000
Aug	18.3 mm (0.7 in)	2 August 2022
Sep	29.5 mm (1.2 in)	24 September 2014
Oct	89.7 mm (3.5 in)	19 October 2004
Nov	108.2 mm (4.3 in)	21 November 2024
Dec	103.1 mm (4.1 in)	11 December 2014

Period of Record Coverage

1996 to 2025

30 years of record at Mt Shasta, 1996 to 2025. 1 years have data for under 90 percent of days and are left out of rankings: 1996.

Days with data per year at Mt Shasta
Year	Days with data	Share of year	Complete
1996	152	42%	No
1997	363	99%	Yes
1998	365	100%	Yes
1999	363	99%	Yes
2000	366	100%	Yes
2001	365	100%	Yes
2002	364	100%	Yes
2003	363	99%	Yes
2004	366	100%	Yes
2005	364	100%	Yes
2006	365	100%	Yes
2007	365	100%	Yes
2008	363	99%	Yes
2009	359	98%	Yes
2010	363	99%	Yes
2011	365	100%	Yes
2012	365	100%	Yes
2013	365	100%	Yes
2014	365	100%	Yes
2015	365	100%	Yes
2016	365	100%	Yes
2017	364	100%	Yes
2018	365	100%	Yes
2019	353	97%	Yes
2020	366	100%	Yes
2021	365	100%	Yes
2022	358	98%	Yes
2023	365	100%	Yes
2024	362	99%	Yes
2025	353	97%	Yes

Latest Records

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

Climate Trend

29 complete years, 1997 to 2025

One stripe for each of 29 complete years at Mt Shasta, 1997 to 2025. Blue stripes are years cooler than the station's own mean of 10.7 C (51.2 F); red stripes are warmer. The coolest year was 1998, at 9.5 C (49.1 F), and the warmest was 2015, at 12.2 C (54.0 F). The strongest colour marks a difference of 1.6 C (2.9 F).

Annual mean temperature at Mt Shasta as warming stripes, 1997 to 2025
Year	Annual mean temperature	Difference from the station mean
1997	10.3 C	-0.33 C
1998	9.5 C	-1.17 C
1999	9.6 C	-1.02 C
2000	10.0 C	-0.69 C
2001	10.4 C	-0.27 C
2002	10.3 C	-0.33 C
2003	10.6 C	-0.04 C
2004	10.5 C	-0.12 C
2005	9.9 C	-0.71 C
2006	10.2 C	-0.47 C
2007	10.3 C	-0.40 C
2008	10.0 C	-0.62 C
2009	10.2 C	-0.43 C
2010	9.8 C	-0.85 C
2011	9.7 C	-0.93 C
2012	10.6 C	-0.08 C
2013	10.9 C	+0.26 C
2014	12.2 C	+1.52 C
2015	12.2 C	+1.56 C
2016	11.5 C	+0.85 C
2017	11.0 C	+0.39 C
2018	11.0 C	+0.36 C
2019	10.3 C	-0.35 C
2020	11.4 C	+0.72 C
2021	11.5 C	+0.84 C
2022	11.3 C	+0.68 C
2023	10.7 C	+0.06 C
2024	11.6 C	+0.92 C
2025	11.4 C	+0.77 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

1996 to 2026

Yearly extremes at Mt Shasta: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	41.1 C (106.0 F)	2022	37.2 C (99.0 F)	31
Coldest night (TNn)	-17.8 C (0.0 F)	1998	-11.6 C (11.1 F)	31
Wettest day (Rx1day)	123.7 mm (4.9 in)	2015	67.3 mm (2.6 in)	29
Wettest five days (Rx5day)	237.7 mm (9.4 in)	2012	145.0 mm (5.7 in)	29
Longest dry spell (CDD)	97 days	2006	53 days	29

Hottest day (TXx)

The hottest day of the year at Mt Shasta, 1996 to 2026. The record is 41.1 C (106.0 F) in 2022, marked on the chart; the median year is 37.2 C (99.0 F).

Hottest day (TXx) at Mt Shasta by year
Year	Hottest day (TXx)
1996	33.9 C (93.0 F)
1997	35.6 C (96.1 F)
1998	36.7 C (98.1 F)
1999	36.1 C (97.0 F)
2000	34.4 C (93.9 F)
2001	35.6 C (96.1 F)
2002	38.3 C (100.9 F)
2003	36.7 C (98.1 F)
2004	35.6 C (96.1 F)
2005	35.0 C (95.0 F)
2006	36.7 C (98.1 F)
2007	37.8 C (100.0 F)
2008	37.8 C (100.0 F)
2009	37.2 C (99.0 F)
2010	36.7 C (98.1 F)
2011	35.0 C (95.0 F)
2012	37.2 C (99.0 F)
2013	38.3 C (100.9 F)
2014	38.3 C (100.9 F)
2015	37.8 C (100.0 F)
2016	38.9 C (102.0 F)
2017	38.3 C (100.9 F)
2018	36.1 C (97.0 F)
2019	36.7 C (98.1 F)
2020	37.2 C (99.0 F)
2021	39.4 C (102.9 F)
2022	41.1 C (106.0 F)
2023	38.9 C (102.0 F)
2024	40.0 C (104.0 F)
2025	37.2 C (99.0 F)
2026	36.7 C (98.1 F)

Coldest night (TNn)

The coldest night of the year at Mt Shasta, 1996 to 2026. The record is -17.8 C (0.0 F) in 1998, marked on the chart; the median year is -11.6 C (11.1 F).

Coldest night (TNn) at Mt Shasta by year
Year	Coldest night (TNn)
1996	-7.8 C (18.0 F)
1997	-13.9 C (7.0 F)
1998	-17.8 C (0.0 F)
1999	-10.6 C (12.9 F)
2000	-8.3 C (17.1 F)
2001	-10.6 C (12.9 F)
2002	-13.9 C (7.0 F)
2003	-10.0 C (14.0 F)
2004	-11.7 C (10.9 F)
2005	-9.4 C (15.1 F)
2006	-11.0 C (12.2 F)
2007	-11.6 C (11.1 F)
2008	-14.3 C (6.3 F)
2009	-16.6 C (2.1 F)
2010	-14.3 C (6.3 F)
2011	-11.6 C (11.1 F)
2012	-12.1 C (10.2 F)
2013	-17.1 C (1.2 F)
2014	-8.8 C (16.2 F)
2015	-11.6 C (11.1 F)
2016	-13.2 C (8.2 F)
2017	-16.0 C (3.2 F)
2018	-8.8 C (16.2 F)
2019	-11.6 C (11.1 F)
2020	-7.7 C (18.1 F)
2021	-12.1 C (10.2 F)
2022	-11.0 C (12.2 F)
2023	-11.0 C (12.2 F)
2024	-7.7 C (18.1 F)
2025	-14.3 C (6.3 F)
2026	-10.6 C (12.9 F)

Wettest day (Rx1day)

The wettest day of the year at Mt Shasta, 1996 to 2026. The record is 123.7 mm (4.9 in) in 2015, marked on the chart; the median year is 67.3 mm (2.6 in).

Wettest day (Rx1day) at Mt Shasta by year
Year	Wettest day (Rx1day)
1996	n/a
1997	n/a
1998	65.5 mm (2.6 in)
1999	55.6 mm (2.2 in)
2000	77.2 mm (3.0 in)
2001	66.5 mm (2.6 in)
2002	86.1 mm (3.4 in)
2003	71.4 mm (2.8 in)
2004	98.6 mm (3.9 in)
2005	63.0 mm (2.5 in)
2006	69.6 mm (2.7 in)
2007	64.8 mm (2.6 in)
2008	64.5 mm (2.5 in)
2009	85.6 mm (3.4 in)
2010	68.3 mm (2.7 in)
2011	67.3 mm (2.6 in)
2012	98.8 mm (3.9 in)
2013	26.4 mm (1.0 in)
2014	103.1 mm (4.1 in)
2015	123.7 mm (4.9 in)
2016	65.3 mm (2.6 in)
2017	85.6 mm (3.4 in)
2018	35.6 mm (1.4 in)
2019	90.2 mm (3.6 in)
2020	39.6 mm (1.6 in)
2021	48.8 mm (1.9 in)
2022	24.6 mm (1.0 in)
2023	63.8 mm (2.5 in)
2024	108.2 mm (4.3 in)
2025	70.6 mm (2.8 in)
2026	45.2 mm (1.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Mt Shasta, 1996 to 2026. The record is 237.7 mm (9.4 in) in 2012, marked on the chart; the median year is 145.0 mm (5.7 in).

Wettest five days (Rx5day) at Mt Shasta by year
Year	Wettest five days (Rx5day)
1996	n/a
1997	n/a
1998	104.8 mm (4.1 in)
1999	100.3 mm (3.9 in)
2000	150.9 mm (5.9 in)
2001	123.6 mm (4.9 in)
2002	183.6 mm (7.2 in)
2003	122.7 mm (4.8 in)
2004	182.6 mm (7.2 in)
2005	165.4 mm (6.5 in)
2006	172.9 mm (6.8 in)
2007	100.6 mm (4.0 in)
2008	151.4 mm (6.0 in)
2009	174.2 mm (6.9 in)
2010	103.4 mm (4.1 in)
2011	138.8 mm (5.5 in)
2012	237.7 mm (9.4 in)
2013	46.2 mm (1.8 in)
2014	162.0 mm (6.4 in)
2015	229.7 mm (9.0 in)
2016	128.5 mm (5.1 in)
2017	145.0 mm (5.7 in)
2018	72.6 mm (2.9 in)
2019	196.2 mm (7.7 in)
2020	59.5 mm (2.3 in)
2021	124.0 mm (4.9 in)
2022	79.7 mm (3.1 in)
2023	205.8 mm (8.1 in)
2024	151.6 mm (6.0 in)
2025	209.6 mm (8.3 in)
2026	119.9 mm (4.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Mt Shasta, 1996 to 2026. The record is 97 days in 2006, marked on the chart; the median year is 53 days.

Longest dry spell (CDD) at Mt Shasta by year
Year	Longest dry spell (CDD)
1996	n/a
1997	n/a
1998	53 days
1999	56 days
2000	34 days
2001	55 days
2002	49 days
2003	49 days
2004	53 days
2005	76 days
2006	97 days
2007	71 days
2008	68 days
2009	42 days
2010	52 days
2011	54 days
2012	96 days
2013	51 days
2014	52 days
2015	44 days
2016	95 days
2017	71 days
2018	50 days
2019	40 days
2020	81 days
2021	42 days
2022	44 days
2023	54 days
2024	90 days
2025	36 days
2026	74 days

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.

Frost Dates and Growing Season

29 years with a frost

Across 29 years with a frost, the median last spring frost at Mt Shasta falls on 12 May and the median first autumn frost on 11 October, which leaves a median of 151 days between them.

Fitted over all years, the growing season changes by +6.4 days per decade at this station.

Frost dates and growing season at Mt Shasta
Measure	Median, all years	Earliest period	Recent period (1997 to 2025)	Recent against earliest	Fitted trend
Last spring frost	12 May	n/a	12 May	n/a	-3.8 days per decade
First autumn frost	11 October	n/a	11 October	n/a	+2.6 days per decade
Growing days	151 days	n/a	151 days	n/a	+6.4 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Download the Data

Data for Mt Shasta standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mt Shasta 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 2026-10-16 (16 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).