Pacifica 4 SSE Weather Records (USC00046599)

Record envelope, standing records and threshold days for Pacifica 4 SSE (USC00046599), California, United States, with 30 years of record.

Key Facts for Pacifica 4 SSE

Pacifica 4 SSE (USC00046599) is a weather station in California, United States at 37.59 latitude and -122.47 longitude, 145 m (475 ft) above sea level.
The station reports from 1983 to 2012, 30 years of record.
1,464 records set at Pacifica 4 SSE 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, 37.59 latitude, -122.47 longitude.
Elevation: 145 m (475 ft).
Period of record: 1983 to 2012, 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 Pacifica 4 SSE. 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 Pacifica 4 SSE, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	23.3 C (73.9 F)	-1.7 C (28.9 F)	n/a	n/a
Feb	25.6 C (78.1 F)	-2.8 C (27.0 F)	n/a	n/a
Mar	27.8 C (82.0 F)	0.6 C (33.1 F)	n/a	n/a
Apr	33.9 C (93.0 F)	2.8 C (37.0 F)	n/a	n/a
May	35.0 C (95.0 F)	3.3 C (37.9 F)	n/a	n/a
Jun	36.7 C (98.1 F)	6.7 C (44.1 F)	n/a	n/a
Jul	37.8 C (100.0 F)	5.6 C (42.1 F)	n/a	n/a
Aug	35.6 C (96.1 F)	4.4 C (39.9 F)	n/a	n/a
Sep	36.7 C (98.1 F)	2.2 C (36.0 F)	n/a	n/a
Oct	38.9 C (102.0 F)	3.3 C (37.9 F)	n/a	n/a
Nov	27.2 C (81.0 F)	1.7 C (35.1 F)	n/a	n/a
Dec	23.3 C (73.9 F)	-5.6 C (21.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Pacifica 4 SSE still stand. 2010 holds the most, with 84.

Standing records at Pacifica 4 SSE by the year they were set
Year set	Standing records
1983	3
1984	64
1985	75
1986	31
1987	48
1988	69
1989	70
1990	67
1991	60
1992	26
1993	37
1994	41
1995	36
1996	50
1997	40
1998	27
1999	49
2000	82
2001	39
2002	48
2003	47
2004	55
2005	25
2006	36
2007	23
2008	48
2009	60
2010	84
2011	79
2012	45

Wettest Day of Each Month

Dec: 127.0 mm (5.0 in)

The wettest day on record for each calendar month at Pacifica 4 SSE. The most was 127.0 mm (5.0 in) on 27 December 2004.

Record daily precipitation for each month at Pacifica 4 SSE
Month	Record daily precipitation (mm)	Date
Jan	92.2 mm (3.6 in)	24 January 2000
Feb	88.1 mm (3.5 in)	16 February 2009
Mar	63.5 mm (2.5 in)	9 March 1995
Apr	40.1 mm (1.6 in)	12 April 2006
May	32.8 mm (1.3 in)	16 May 1996
Jun	29.5 mm (1.2 in)	4 June 2011
Jul	4.6 mm (0.18 in)	13 July 2011
Aug	17.8 mm (0.7 in)	20 August 1997
Sep	19.1 mm (0.8 in)	24 September 1986
Oct	116.8 mm (4.6 in)	13 October 2009
Nov	102.9 mm (4.1 in)	5 November 1994
Dec	127.0 mm (5.0 in)	27 December 2004

Period of Record Coverage

1983 to 2012

30 years of record at Pacifica 4 SSE, 1983 to 2012. 7 years have data for under 90 percent of days and are left out of rankings: 1983, 1985, 1986, 1987, 2003, 2009, 2012.

Days with data per year at Pacifica 4 SSE
Year	Days with data	Share of year	Complete
1983	60	16%	No
1984	337	92%	Yes
1985	326	89%	No
1986	299	82%	No
1987	323	88%	No
1988	333	91%	Yes
1989	363	99%	Yes
1990	364	100%	Yes
1991	348	95%	Yes
1992	344	94%	Yes
1993	340	93%	Yes
1994	331	91%	Yes
1995	350	96%	Yes
1996	360	98%	Yes
1997	358	98%	Yes
1998	355	97%	Yes
1999	341	93%	Yes
2000	358	98%	Yes
2001	330	90%	Yes
2002	354	97%	Yes
2003	325	89%	No
2004	353	96%	Yes
2005	346	95%	Yes
2006	354	97%	Yes
2007	354	97%	Yes
2008	352	96%	Yes
2009	319	87%	No
2010	364	100%	Yes
2011	365	100%	Yes
2012	237	65%	No

Latest Records

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

Climate Trend

24 complete years, 1984 to 2011

One stripe for each of 24 complete years at Pacifica 4 SSE, 1984 to 2011. Blue stripes are years cooler than the station's own mean of 13.9 C (57.1 F); red stripes are warmer. The coolest year was 2011, at 12.4 C (54.3 F), and the warmest was 2004, at 15.1 C (59.2 F). The strongest colour marks a difference of 1.6 C (2.9 F).

Annual mean temperature at Pacifica 4 SSE as warming stripes, 1984 to 2011
Year	Annual mean temperature	Difference from the station mean
1984	14.0 C	+0.07 C
1985	13.5 C	-0.40 C
1987	14.2 C	+0.29 C
1988	14.2 C	+0.28 C
1989	13.7 C	-0.24 C
1990	13.7 C	-0.27 C
1991	13.5 C	-0.46 C
1992	14.5 C	+0.53 C
1993	13.9 C	-0.02 C
1994	13.0 C	-0.93 C
1995	14.2 C	+0.30 C
1996	14.0 C	+0.05 C
1997	14.4 C	+0.48 C
1998	13.6 C	-0.36 C
1999	13.6 C	-0.37 C
2000	13.5 C	-0.39 C
2002	14.8 C	+0.84 C
2004	15.1 C	+1.17 C
2005	14.7 C	+0.82 C
2006	14.3 C	+0.38 C
2007	14.4 C	+0.47 C
2008	14.7 C	+0.74 C
2010	12.5 C	-1.41 C
2011	12.4 C	-1.54 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

1983 to 2012

Yearly extremes at Pacifica 4 SSE: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	38.9 C (102.0 F)	1987	34.2 C (93.5 F)	30
Coldest night (TNn)	-5.6 C (21.9 F)	2000	2.0 C (35.5 F)	30
Wettest day (Rx1day)	127.0 mm (5.0 in)	2004	56.7 mm (2.2 in)	30
Wettest five days (Rx5day)	246.2 mm (9.7 in)	2002	126.0 mm (5.0 in)	30
Longest dry spell (CDD)	174 days	1987	87 days	30

Hottest day (TXx)

The hottest day of the year at Pacifica 4 SSE, 1983 to 2012. The record is 38.9 C (102.0 F) in 1987, marked on the chart; the median year is 34.2 C (93.5 F).

Hottest day (TXx) at Pacifica 4 SSE by year
Year	Hottest day (TXx)
1983	21.1 C (70.0 F)
1984	36.7 C (98.1 F)
1985	36.1 C (97.0 F)
1986	31.7 C (89.1 F)
1987	38.9 C (102.0 F)
1988	37.8 C (100.0 F)
1989	35.0 C (95.0 F)
1990	33.9 C (93.0 F)
1991	35.0 C (95.0 F)
1992	32.8 C (91.0 F)
1993	36.1 C (97.0 F)
1994	33.9 C (93.0 F)
1995	33.3 C (91.9 F)
1996	36.1 C (97.0 F)
1997	34.4 C (93.9 F)
1998	29.4 C (84.9 F)
1999	31.1 C (88.0 F)
2000	36.7 C (98.1 F)
2001	34.4 C (93.9 F)
2002	32.2 C (90.0 F)
2003	35.0 C (95.0 F)
2004	32.2 C (90.0 F)
2005	28.3 C (82.9 F)
2006	31.1 C (88.0 F)
2007	30.0 C (86.0 F)
2008	35.0 C (95.0 F)
2009	35.0 C (95.0 F)
2010	35.6 C (96.1 F)
2011	30.6 C (87.1 F)
2012	29.4 C (84.9 F)

Coldest night (TNn)

The coldest night of the year at Pacifica 4 SSE, 1983 to 2012. The record is -5.6 C (21.9 F) in 2000, marked on the chart; the median year is 2.0 C (35.5 F).

Coldest night (TNn) at Pacifica 4 SSE by year
Year	Coldest night (TNn)
1983	3.9 C (39.0 F)
1984	1.7 C (35.1 F)
1985	2.2 C (36.0 F)
1986	3.9 C (39.0 F)
1987	1.7 C (35.1 F)
1988	1.1 C (34.0 F)
1989	-2.8 C (27.0 F)
1990	-5.0 C (23.0 F)
1991	3.3 C (37.9 F)
1992	1.1 C (34.0 F)
1993	1.1 C (34.0 F)
1994	2.2 C (36.0 F)
1995	3.3 C (37.9 F)
1996	2.2 C (36.0 F)
1997	0.0 C (32.0 F)
1998	3.9 C (39.0 F)
1999	2.2 C (36.0 F)
2000	-5.6 C (21.9 F)
2001	0.0 C (32.0 F)
2002	4.4 C (39.9 F)
2003	6.7 C (44.1 F)
2004	3.9 C (39.0 F)
2005	5.0 C (41.0 F)
2006	0.6 C (33.1 F)
2007	3.9 C (39.0 F)
2008	-1.7 C (28.9 F)
2009	1.7 C (35.1 F)
2010	-1.7 C (28.9 F)
2011	1.1 C (34.0 F)
2012	3.3 C (37.9 F)

Wettest day (Rx1day)

The wettest day of the year at Pacifica 4 SSE, 1983 to 2012. The record is 127.0 mm (5.0 in) in 2004, marked on the chart; the median year is 56.7 mm (2.2 in).

Wettest day (Rx1day) at Pacifica 4 SSE by year
Year	Wettest day (Rx1day)
1983	57.2 mm (2.3 in)
1984	38.6 mm (1.5 in)
1985	52.1 mm (2.1 in)
1986	74.9 mm (2.9 in)
1987	56.1 mm (2.2 in)
1988	34.0 mm (1.3 in)
1989	50.8 mm (2.0 in)
1990	31.8 mm (1.3 in)
1991	50.8 mm (2.0 in)
1992	53.3 mm (2.1 in)
1993	88.6 mm (3.5 in)
1994	102.9 mm (4.1 in)
1995	94.0 mm (3.7 in)
1996	59.7 mm (2.4 in)
1997	63.5 mm (2.5 in)
1998	78.5 mm (3.1 in)
1999	48.0 mm (1.9 in)
2000	92.2 mm (3.6 in)
2001	53.8 mm (2.1 in)
2002	93.2 mm (3.7 in)
2003	98.6 mm (3.9 in)
2004	127.0 mm (5.0 in)
2005	86.4 mm (3.4 in)
2006	55.1 mm (2.2 in)
2007	55.4 mm (2.2 in)
2008	86.4 mm (3.4 in)
2009	116.8 mm (4.6 in)
2010	43.9 mm (1.7 in)
2011	29.7 mm (1.2 in)
2012	54.6 mm (2.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Pacifica 4 SSE, 1983 to 2012. The record is 246.2 mm (9.7 in) in 2002, marked on the chart; the median year is 126.0 mm (5.0 in).

Wettest five days (Rx5day) at Pacifica 4 SSE by year
Year	Wettest five days (Rx5day)
1983	107.1 mm (4.2 in)
1984	79.7 mm (3.1 in)
1985	82.3 mm (3.2 in)
1986	236.7 mm (9.3 in)
1987	106.4 mm (4.2 in)
1988	100.8 mm (4.0 in)
1989	65.6 mm (2.6 in)
1990	74.7 mm (2.9 in)
1991	94.8 mm (3.7 in)
1992	155.6 mm (6.1 in)
1993	133.5 mm (5.3 in)
1994	158.0 mm (6.2 in)
1995	206.5 mm (8.1 in)
1996	118.5 mm (4.7 in)
1997	179.9 mm (7.1 in)
1998	214.9 mm (8.5 in)
1999	116.1 mm (4.6 in)
2000	180.6 mm (7.1 in)
2001	92.0 mm (3.6 in)
2002	246.2 mm (9.7 in)
2003	105.7 mm (4.2 in)
2004	199.8 mm (7.9 in)
2005	142.6 mm (5.6 in)
2006	141.0 mm (5.6 in)
2007	110.2 mm (4.3 in)
2008	135.6 mm (5.3 in)
2009	163.7 mm (6.4 in)
2010	144.8 mm (5.7 in)
2011	110.0 mm (4.3 in)
2012	48.0 mm (1.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Pacifica 4 SSE, 1983 to 2012. The record is 174 days in 1987, marked on the chart; the median year is 87 days.

Longest dry spell (CDD) at Pacifica 4 SSE by year
Year	Longest dry spell (CDD)
1983	4 days
1984	44 days
1985	47 days
1986	107 days
1987	174 days
1988	119 days
1989	77 days
1990	54 days
1991	30 days
1992	72 days
1993	132 days
1994	46 days
1995	100 days
1996	65 days
1997	49 days
1998	57 days
1999	97 days
2000	84 days
2001	89 days
2002	121 days
2003	122 days
2004	64 days
2005	95 days
2006	135 days
2007	140 days
2008	132 days
2009	118 days
2010	113 days
2011	15 days
2012	7 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.

Download the Data

Data for Pacifica 4 SSE standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Pacifica 4 SSE 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).