Sims California Weather Records (USR0000CSIM)

Record envelope, standing records and threshold days for Sims California (USR0000CSIM), California, United States, with 35 years of record.

Key Facts for Sims California

Sims California (USR0000CSIM) is a weather station in California, United States at 41.08 latitude and -122.37 longitude, 732 m (2,400 ft) above sea level.
The station reports from 1989 to 2023, 35 years of record.
1,464 records set at Sims California still stand.
Records are tracked for tmax, tmin: an element needs 30 years of data to be eligible.
Sims California set a daily record high minimum temperature of 17.8 C (64.0 F) on 9 October 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

Location: California, United States, 41.08 latitude, -122.37 longitude.
Elevation: 732 m (2,400 ft).
Period of record: 1989 to 2023, 35 years.
Eligible elements: tmax, tmin.

Daily Record Envelope and 2026

25 days at or beyond a record

The band shows the record high and record low for each calendar day at Sims California. The lines show the 2026 daily maximum and minimum. 25 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Sims California, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	22.8 C (73.0 F)	-8.9 C (16.0 F)	20.6 C (69.1 F)	-1.1 C (30.0 F)
Feb	26.1 C (79.0 F)	-7.2 C (19.0 F)	23.3 C (73.9 F)	-5.0 C (23.0 F)
Mar	33.9 C (93.0 F)	-6.7 C (19.9 F)	33.9 C (93.0 F)	2.8 C (37.0 F)
Apr	36.7 C (98.1 F)	-3.3 C (26.1 F)	28.9 C (84.0 F)	-1.1 C (30.0 F)
May	40.0 C (104.0 F)	-1.7 C (28.9 F)	32.2 C (90.0 F)	6.7 C (44.1 F)
Jun	45.0 C (113.0 F)	3.3 C (37.9 F)	40.6 C (105.1 F)	8.3 C (46.9 F)
Jul	46.7 C (116.1 F)	7.8 C (46.0 F)	38.9 C (102.0 F)	12.2 C (54.0 F)
Aug	45.6 C (114.1 F)	7.8 C (46.0 F)	41.1 C (106.0 F)	12.8 C (55.0 F)
Sep	45.6 C (114.1 F)	1.7 C (35.1 F)	36.1 C (97.0 F)	7.2 C (45.0 F)
Oct	40.6 C (105.1 F)	0.0 C (32.0 F)	38.9 C (102.0 F)	6.7 C (44.1 F)
Nov	30.0 C (86.0 F)	-6.7 C (19.9 F)	n/a	n/a
Dec	21.1 C (70.0 F)	-11.1 C (12.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Sims California still stand. 2008 holds the most, with 63.

Standing records at Sims California by the year they were set
Year set	Standing records
1989	13
1990	61
1991	44
1992	45
1993	32
1994	48
1995	20
1996	9
1997	5
1998	21
1999	29
2000	49
2001	50
2002	27
2003	54
2004	27
2005	56
2006	48
2007	50
2008	63
2009	43
2010	37
2011	56
2012	48
2013	51
2014	28
2016	38
2017	47
2018	25
2019	44
2020	44
2021	47
2022	53
2023	48
2024	38
2025	35
2026	31

Period of Record Coverage

1989 to 2026

37 years of record at Sims California, 1989 to 2026. 13 years have data for under 90 percent of days and are left out of rankings: 1989, 1990, 1991, 1993, 1995, 1996, 1997, 1998 and others.

Days with data per year at Sims California
Year	Days with data	Share of year	Complete
1989	47	13%	No
1990	315	86%	No
1991	260	71%	No
1992	366	100%	Yes
1993	193	53%	No
1994	363	99%	Yes
1995	129	35%	No
1996	60	16%	No
1997	10	3%	No
1998	144	39%	No
1999	199	55%	No
2000	309	84%	No
2001	354	97%	Yes
2002	274	75%	No
2003	345	95%	Yes
2004	268	73%	No
2005	364	100%	Yes
2006	365	100%	Yes
2007	365	100%	Yes
2008	366	100%	Yes
2009	365	100%	Yes
2010	335	92%	Yes
2011	350	96%	Yes
2012	358	98%	Yes
2013	364	100%	Yes
2014	347	95%	Yes
2016	364	99%	Yes
2017	365	100%	Yes
2018	365	100%	Yes
2019	364	100%	Yes
2020	366	100%	Yes
2021	365	100%	Yes
2022	365	100%	Yes
2023	365	100%	Yes
2024	366	100%	Yes
2025	365	100%	Yes
2026	284	78%	No

Latest Records

Latest records at Sims California
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
9 October 2026	Sims California, US	daily high min (Provisional)	17.8 C (64.0 F)	1.7 C (3.1 F)	4 years	8 of 100 (Routine)
9 October 2026	Sims California, US	daily high max (Tie, Provisional)	35.0 C (95.0 F)	tie	29 years	2 of 100 (Routine)
8 October 2026	Sims California, US	daily high min (Provisional)	18.9 C (66.0 F)	2.2 C (4.0 F)	4 years	10 of 100 (Routine)
8 October 2026	Sims California, US	daily high max (Provisional)	38.9 C (102.0 F)	3.9 C (7.0 F)	4 years	9 of 100 (Routine)
7 October 2026	Sims California, US	daily high min (Provisional)	18.3 C (64.9 F)	1.6 C (2.9 F)	1 year	7 of 100 (Routine)
6 October 2026	Sims California, US	daily high min (Provisional)	18.3 C (64.9 F)	2.2 C (4.0 F)	12 years	12 of 100 (Routine)
6 October 2026	Sims California, US	daily high max (Provisional)	36.7 C (98.1 F)	0.6 C (1.1 F)	29 years	11 of 100 (Routine)
5 October 2026	Sims California, US	daily high min (Provisional)	18.3 C (64.9 F)	2.7 C (4.9 F)	4 years	11 of 100 (Routine)
4 October 2026	Sims California, US	daily high min (Provisional)	17.2 C (63.0 F)	1.1 C (2.0 F)	5 years	7 of 100 (Routine)
13 September 2026	Sims California, US	daily low min (Provisional)	8.3 C (46.9 F)	0.6 C (1.1 F)	20 years	10 of 100 (Routine)
5 September 2026	Sims California, US	daily low max (Provisional)	25.0 C (77.0 F)	2.2 C (4.0 F)	25 years	13 of 100 (Routine)
4 September 2026	Sims California, US	daily low min (Provisional)	7.2 C (45.0 F)	0.6 C (1.1 F)	25 years	11 of 100 (Routine)
3 September 2026	Sims California, US	daily low max (Provisional)	13.9 C (57.0 F)	6.7 C (12.1 F)	25 years	21 of 100 (Routine)
2 September 2026	Sims California, US	monthly low max (Provisional)	12.8 C (55.0 F)	0.5 C (0.9 F)	26 years	20 of 100 (Routine)
8 August 2026	Sims California, US	daily high min (Tie)	21.7 C (71.1 F)	tie	36 years	3 of 100 (Routine)
28 June 2026	Sims California, US	daily low min (Tie)	9.4 C (48.9 F)	tie	7 years	1 of 100 (Routine)
16 June 2026	Sims California, US	daily high min	19.4 C (66.9 F)	1.1 C (2.0 F)	13 years	9 of 100 (Routine)
15 June 2026	Sims California, US	daily high max	40.6 C (105.1 F)	3.4 C (6.1 F)	25 years	15 of 100 (Routine)
14 June 2026	Sims California, US	daily high max (Tie)	38.3 C (100.9 F)	tie	25 years	2 of 100 (Routine)
13 June 2026	Sims California, US	daily high max	36.7 C (98.1 F)	0.6 C (1.1 F)	25 years	11 of 100 (Routine)

Climate Trend

21 complete years, 1992 to 2025

One stripe for each of 21 complete years at Sims California, 1992 to 2025. Blue stripes are years cooler than the station's own mean of 14.8 C (58.6 F); red stripes are warmer. The coolest year was 2011, at 13.7 C (56.6 F), and the warmest was 2013, at 15.5 C (60.0 F). The strongest colour marks a difference of 1.1 C (2.0 F).

Annual mean temperature at Sims California as warming stripes, 1992 to 2025
Year	Annual mean temperature	Difference from the station mean
1992	15.4 C	+0.60 C
1994	14.2 C	-0.61 C
2001	14.9 C	+0.14 C
2005	14.2 C	-0.60 C
2006	14.3 C	-0.48 C
2007	14.7 C	-0.06 C
2008	14.6 C	-0.18 C
2009	14.7 C	-0.05 C
2011	13.7 C	-1.09 C
2012	14.7 C	-0.10 C
2013	15.5 C	+0.78 C
2016	14.7 C	-0.02 C
2017	14.9 C	+0.13 C
2018	15.2 C	+0.44 C
2019	14.3 C	-0.47 C
2020	15.5 C	+0.69 C
2021	15.4 C	+0.66 C
2022	15.1 C	+0.36 C
2023	13.9 C	-0.88 C
2024	14.9 C	+0.12 C
2025	15.4 C	+0.65 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

1989 to 2026

Yearly extremes at Sims California: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	46.7 C (116.1 F)	2003	43.9 C (111.0 F)	37
Coldest night (TNn)	-11.1 C (12.0 F)	2013	-4.4 C (24.1 F)	37

Hottest day (TXx)

The hottest day of the year at Sims California, 1989 to 2026. The record is 46.7 C (116.1 F) in 2003, marked on the chart; the median year is 43.9 C (111.0 F).

Hottest day (TXx) at Sims California by year
Year	Hottest day (TXx)
1989	23.9 C (75.0 F)
1990	45.0 C (113.0 F)
1991	43.3 C (109.9 F)
1992	42.2 C (108.0 F)
1993	42.2 C (108.0 F)
1994	42.2 C (108.0 F)
1995	40.6 C (105.1 F)
1996	40.0 C (104.0 F)
1997	42.2 C (108.0 F)
1998	45.6 C (114.1 F)
1999	44.4 C (111.9 F)
2000	42.8 C (109.0 F)
2001	43.9 C (111.0 F)
2002	46.1 C (115.0 F)
2003	46.7 C (116.1 F)
2004	41.7 C (107.1 F)
2005	41.7 C (107.1 F)
2006	45.0 C (113.0 F)
2007	45.6 C (114.1 F)
2008	45.6 C (114.1 F)
2009	43.9 C (111.0 F)
2010	42.2 C (108.0 F)
2011	40.6 C (105.1 F)
2012	45.0 C (113.0 F)
2013	43.9 C (111.0 F)
2014	45.6 C (114.1 F)
2016	43.9 C (111.0 F)
2017	44.4 C (111.9 F)
2018	43.9 C (111.0 F)
2019	40.6 C (105.1 F)
2020	43.9 C (111.0 F)
2021	43.3 C (109.9 F)
2022	45.0 C (113.0 F)
2023	42.2 C (108.0 F)
2024	45.6 C (114.1 F)
2025	42.2 C (108.0 F)
2026	41.1 C (106.0 F)

Coldest night (TNn)

The coldest night of the year at Sims California, 1989 to 2026. The record is -11.1 C (12.0 F) in 2013, marked on the chart; the median year is -4.4 C (24.1 F).

Coldest night (TNn) at Sims California by year
Year	Coldest night (TNn)
1989	-1.7 C (28.9 F)
1990	-7.2 C (19.0 F)
1991	-2.2 C (28.0 F)
1992	-3.3 C (26.1 F)
1993	-6.7 C (19.9 F)
1994	-3.9 C (25.0 F)
1995	1.1 C (34.0 F)
1996	6.7 C (44.1 F)
1997	21.1 C (70.0 F)
1998	0.6 C (33.1 F)
1999	-2.8 C (27.0 F)
2000	-3.9 C (25.0 F)
2001	-3.9 C (25.0 F)
2002	-2.8 C (27.0 F)
2003	-2.2 C (28.0 F)
2004	-2.2 C (28.0 F)
2005	-2.8 C (27.0 F)
2006	-6.7 C (19.9 F)
2007	-6.1 C (21.0 F)
2008	-7.8 C (18.0 F)
2009	-8.3 C (17.1 F)
2010	-6.7 C (19.9 F)
2011	-5.6 C (21.9 F)
2012	-6.1 C (21.0 F)
2013	-11.1 C (12.0 F)
2014	-3.3 C (26.1 F)
2016	-5.6 C (21.9 F)
2017	-8.9 C (16.0 F)
2018	-4.4 C (24.1 F)
2019	-5.0 C (23.0 F)
2020	-2.8 C (27.0 F)
2021	-4.4 C (24.1 F)
2022	-5.0 C (23.0 F)
2023	-6.1 C (21.0 F)
2024	-4.4 C (24.1 F)
2025	-6.7 C (19.9 F)
2026	-5.0 C (23.0 F)

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

21 years with a frost

Across 21 years with a frost, the median last spring frost at Sims California falls on 15 April and the median first autumn frost on 12 November, which leaves a median of 216 days between them.

Frost dates and growing season at Sims California
Measure	Median, all years	Earliest period	Recent period (1992 to 2025)	Recent against earliest	Fitted trend
Last spring frost	15 April	n/a	15 April	n/a	n/a
First autumn frost	12 November	n/a	12 November	n/a	n/a
Growing days	216 days	n/a	216 days	n/a	n/a

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 Sims California standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Sims California 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-13. Last revised 13 October 2026 (2026-10-13).