Sacramento McClellan AFB Weather Records (USW00023208)

Record envelope, standing records and threshold days for Sacramento McClellan AFB (USW00023208), California, United States, with 78 years of record.

Key Facts for Sacramento McClellan AFB

Sacramento McClellan AFB (USW00023208) is a weather station in California, United States at 38.67 latitude and -121.40 longitude, 25 m (82 ft) above sea level.
The station reports from 1949 to 2026, 78 years of record.
1,464 records set at Sacramento McClellan AFB 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, 38.67 latitude, -121.40 longitude.
Elevation: 25 m (82 ft).
Period of record: 1949 to 2026, 78 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

18 days at or beyond a record

The band shows the record high and record low for each calendar day at Sacramento McClellan AFB. The lines show the 2026 daily maximum and minimum. 18 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Sacramento McClellan AFB, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	23.9 C (75.0 F)	-6.1 C (21.0 F)	21.0 C (69.8 F)	-1.0 C (30.2 F)
Feb	23.9 C (75.0 F)	-2.8 C (27.0 F)	23.0 C (73.4 F)	-1.0 C (30.2 F)
Mar	28.9 C (84.0 F)	-2.8 C (27.0 F)	28.0 C (82.4 F)	3.0 C (37.4 F)
Apr	34.4 C (93.9 F)	1.1 C (34.0 F)	31.0 C (87.8 F)	3.0 C (37.4 F)
May	39.4 C (102.9 F)	2.2 C (36.0 F)	39.0 C (102.2 F)	10.0 C (50.0 F)
Jun	43.3 C (109.9 F)	6.7 C (44.1 F)	39.0 C (102.2 F)	12.0 C (53.6 F)
Jul	42.8 C (109.0 F)	8.9 C (48.0 F)	40.0 C (104.0 F)	13.0 C (55.4 F)
Aug	43.3 C (109.9 F)	9.4 C (48.9 F)	40.0 C (104.0 F)	15.0 C (59.0 F)
Sep	43.3 C (109.9 F)	5.0 C (41.0 F)	36.0 C (96.8 F)	15.0 C (59.0 F)
Oct	38.9 C (102.0 F)	1.7 C (35.1 F)	32.0 C (89.6 F)	7.0 C (44.6 F)
Nov	30.6 C (87.1 F)	-2.8 C (27.0 F)	26.0 C (78.8 F)	4.0 C (39.2 F)
Dec	24.4 C (75.9 F)	-5.0 C (23.0 F)	18.0 C (64.4 F)	2.0 C (35.6 F)

Which Years Hold Standing Records

1,464 standing records

1,464 records at Sacramento McClellan AFB still stand. 1950 holds the most, with 104.

Standing records at Sacramento McClellan AFB by the year they were set
Year set	Standing records
1949	79
1950	104
1951	67
1952	66
1953	58
1954	62
1955	65
1956	50
1957	63
1958	67
1959	69
1960	61
1961	74
1962	63
1963	68
1964	70
1965	69
1966	56
1967	72
1968	54
1969	36
1970	50
2025	41

Wettest Day of Each Month

Feb: 128.0 mm (5.0 in)

The wettest day on record for each calendar month at Sacramento McClellan AFB. The most was 128.0 mm (5.0 in) on 9 February 1962.

Record daily precipitation for each month at Sacramento McClellan AFB
Month	Record daily precipitation (mm)	Date
Jan	70.4 mm (2.8 in)	30 January 1963
Feb	128.0 mm (5.0 in)	9 February 1962
Mar	55.9 mm (2.2 in)	6 March 1952
Apr	71.1 mm (2.8 in)	2 April 1958
May	30.0 mm (1.2 in)	18 May 1957
Jun	18.3 mm (0.7 in)	6 June 1953
Jul	1.5 mm (0.06 in)	30 July 1949
Aug	11.2 mm (0.4 in)	11 August 1965
Sep	51.1 mm (2.0 in)	18 September 1959
Oct	90.2 mm (3.6 in)	13 October 1962
Nov	55.9 mm (2.2 in)	28 November 1970
Dec	77.0 mm (3.0 in)	23 December 1955

Period of Record Coverage

1949 to 2025

23 years of record at Sacramento McClellan AFB, 1949 to 2025. Every year has data for at least 90 percent of its days.

Days with data per year at Sacramento McClellan AFB
Year	Days with data	Share of year	Complete
1949	365	100%	Yes
1950	363	99%	Yes
1951	365	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	365	100%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	364	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	363	99%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	364	100%	Yes
2025	360	99%	Yes

Latest Records

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

Climate Trend

23 complete years, 1949 to 2025

One stripe for each of 23 complete years at Sacramento McClellan AFB, 1949 to 2025. Blue stripes are years cooler than the station's own mean of 16.5 C (61.6 F); red stripes are warmer. The coolest year was 1965, at 15.1 C (59.3 F), and the warmest was 1958, at 17.7 C (63.9 F). The strongest colour marks a difference of 1.4 C (2.5 F).

Annual mean temperature at Sacramento McClellan AFB as warming stripes, 1949 to 2025
Year	Annual mean temperature	Difference from the station mean
1949	15.9 C	-0.55 C
1950	17.0 C	+0.55 C
1951	16.4 C	-0.07 C
1952	16.4 C	-0.09 C
1953	16.6 C	+0.12 C
1954	16.2 C	-0.22 C
1955	16.2 C	-0.29 C
1956	16.3 C	-0.13 C
1957	16.6 C	+0.18 C
1958	17.7 C	+1.28 C
1959	17.6 C	+1.18 C
1960	17.1 C	+0.66 C
1961	16.0 C	-0.45 C
1962	15.6 C	-0.82 C
1963	15.2 C	-1.26 C
1964	15.7 C	-0.78 C
1965	15.1 C	-1.32 C
1966	16.4 C	-0.07 C
1967	16.2 C	-0.29 C
1968	16.8 C	+0.32 C
1969	16.7 C	+0.28 C
1970	17.1 C	+0.60 C
2025	17.6 C	+1.12 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

1949 to 2026

Yearly extremes at Sacramento McClellan AFB: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	43.3 C (109.9 F)	1950	41.1 C (106.0 F)	24
Coldest night (TNn)	-6.1 C (21.0 F)	1949	-2.8 C (27.0 F)	24
Wettest day (Rx1day)	128.0 mm (5.0 in)	1962	50.8 mm (2.0 in)	22
Wettest five days (Rx5day)	230.7 mm (9.1 in)	1955	97.7 mm (3.8 in)	22
Longest dry spell (CDD)	144 days	1959	116 days	22

Hottest day (TXx)

The hottest day of the year at Sacramento McClellan AFB, 1949 to 2026. The record is 43.3 C (109.9 F) in 1950, marked on the chart; the median year is 41.1 C (106.0 F).

Hottest day (TXx) at Sacramento McClellan AFB by year
Year	Hottest day (TXx)
1949	39.4 C (102.9 F)
1950	43.3 C (109.9 F)
1951	41.7 C (107.1 F)
1952	40.6 C (105.1 F)
1953	40.6 C (105.1 F)
1954	42.2 C (108.0 F)
1955	41.7 C (107.1 F)
1956	41.1 C (106.0 F)
1957	41.7 C (107.1 F)
1958	40.0 C (104.0 F)
1959	41.1 C (106.0 F)
1960	42.2 C (108.0 F)
1961	43.3 C (109.9 F)
1962	38.9 C (102.0 F)
1963	39.4 C (102.9 F)
1964	40.0 C (104.0 F)
1965	38.9 C (102.0 F)
1966	41.7 C (107.1 F)
1967	40.6 C (105.1 F)
1968	41.7 C (107.1 F)
1969	41.1 C (106.0 F)
1970	42.2 C (108.0 F)
2025	40.0 C (104.0 F)
2026	40.0 C (104.0 F)

Coldest night (TNn)

The coldest night of the year at Sacramento McClellan AFB, 1949 to 2026. The record is -6.1 C (21.0 F) in 1949, marked on the chart; the median year is -2.8 C (27.0 F).

Coldest night (TNn) at Sacramento McClellan AFB by year
Year	Coldest night (TNn)
1949	-6.1 C (21.0 F)
1950	-4.4 C (24.1 F)
1951	-1.1 C (30.0 F)
1952	-2.8 C (27.0 F)
1953	-1.7 C (28.9 F)
1954	-1.1 C (30.0 F)
1955	-1.1 C (30.0 F)
1956	-2.2 C (28.0 F)
1957	-3.9 C (25.0 F)
1958	-1.1 C (30.0 F)
1959	-3.3 C (26.1 F)
1960	-3.3 C (26.1 F)
1961	-4.4 C (24.1 F)
1962	-4.4 C (24.1 F)
1963	-6.1 C (21.0 F)
1964	-2.8 C (27.0 F)
1965	-5.0 C (23.0 F)
1966	-2.8 C (27.0 F)
1967	-2.8 C (27.0 F)
1968	-5.6 C (21.9 F)
1969	-2.2 C (28.0 F)
1970	-3.3 C (26.1 F)
2025	-1.0 C (30.2 F)
2026	0.0 C (32.0 F)

Wettest day (Rx1day)

The wettest day of the year at Sacramento McClellan AFB, 1949 to 2026. The record is 128.0 mm (5.0 in) in 1962, marked on the chart; the median year is 50.8 mm (2.0 in).

Wettest day (Rx1day) at Sacramento McClellan AFB by year
Year	Wettest day (Rx1day)
1949	37.3 mm (1.5 in)
1950	55.4 mm (2.2 in)
1951	51.8 mm (2.0 in)
1952	55.9 mm (2.2 in)
1953	45.5 mm (1.8 in)
1954	50.5 mm (2.0 in)
1955	77.0 mm (3.0 in)
1956	49.3 mm (1.9 in)
1957	31.5 mm (1.2 in)
1958	71.1 mm (2.8 in)
1959	51.1 mm (2.0 in)
1960	45.2 mm (1.8 in)
1961	33.8 mm (1.3 in)
1962	128.0 mm (5.0 in)
1963	70.4 mm (2.8 in)
1964	52.1 mm (2.1 in)
1965	25.9 mm (1.0 in)
1966	34.5 mm (1.4 in)
1967	69.3 mm (2.7 in)
1968	30.2 mm (1.2 in)
1969	36.8 mm (1.4 in)
1970	55.9 mm (2.2 in)
2025	n/a
2026	n/a

Wettest five days (Rx5day)

The wettest five days of the year at Sacramento McClellan AFB, 1949 to 2026. The record is 230.7 mm (9.1 in) in 1955, marked on the chart; the median year is 97.7 mm (3.8 in).

Wettest five days (Rx5day) at Sacramento McClellan AFB by year
Year	Wettest five days (Rx5day)
1949	54.4 mm (2.1 in)
1950	179.8 mm (7.1 in)
1951	93.9 mm (3.7 in)
1952	147.5 mm (5.8 in)
1953	62.2 mm (2.4 in)
1954	89.2 mm (3.5 in)
1955	230.7 mm (9.1 in)
1956	88.2 mm (3.5 in)
1957	80.5 mm (3.2 in)
1958	164.7 mm (6.5 in)
1959	101.9 mm (4.0 in)
1960	75.9 mm (3.0 in)
1961	95.3 mm (3.8 in)
1962	208.0 mm (8.2 in)
1963	122.5 mm (4.8 in)
1964	100.1 mm (3.9 in)
1965	58.9 mm (2.3 in)
1966	66.1 mm (2.6 in)
1967	130.5 mm (5.1 in)
1968	50.3 mm (2.0 in)
1969	100.6 mm (4.0 in)
1970	132.3 mm (5.2 in)
2025	n/a
2026	n/a

Longest dry spell (CDD)

The longest dry spell of the year at Sacramento McClellan AFB, 1949 to 2026. The record is 144 days in 1959, marked on the chart; the median year is 116 days.

Longest dry spell (CDD) at Sacramento McClellan AFB by year
Year	Longest dry spell (CDD)
1949	71 days
1950	127 days
1951	135 days
1952	72 days
1953	83 days
1954	108 days
1955	128 days
1956	132 days
1957	129 days
1958	101 days
1959	144 days
1960	134 days
1961	120 days
1962	102 days
1963	124 days
1964	82 days
1965	81 days
1966	98 days
1967	111 days
1968	72 days
1969	120 days
1970	132 days
2025	n/a
2026	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 Sacramento McClellan AFB standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Sacramento McClellan AFB 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 2026-10-17 (17 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).