Tacoma McChord AFB Weather Records (USW00024207)

Record envelope, standing records and threshold days for Tacoma McChord AFB (USW00024207), Washington, United States, with 81 years of record.

Key Facts for Tacoma McChord AFB

Tacoma McChord AFB (USW00024207) is a weather station in Washington, United States at 47.15 latitude and -122.48 longitude, 88 m (289 ft) above sea level.
The station reports from 1946 to 2026, 81 years of record.
1,464 records set at Tacoma McChord AFB still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Washington, United States, 47.15 latitude, -122.48 longitude.
Elevation: 88 m (289 ft).
Period of record: 1946 to 2026, 81 years.
Eligible elements: none yet.

Daily Record Envelope and 2026

43 days at or beyond a record

The band shows the record high and record low for each calendar day at Tacoma McChord AFB. The lines show the 2026 daily maximum and minimum. 43 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Tacoma McChord AFB, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	16.1 C (61.0 F)	-20.6 C (-5.1 F)	11.5 C (52.7 F)	-7.0 C (19.4 F)
Feb	21.7 C (71.1 F)	-18.3 C (-0.9 F)	17.5 C (63.5 F)	-9.4 C (15.1 F)
Mar	23.3 C (73.9 F)	-11.1 C (12.0 F)	22.5 C (72.5 F)	-2.1 C (28.2 F)
Apr	27.2 C (81.0 F)	-2.8 C (27.0 F)	23.9 C (75.0 F)	-0.9 C (30.4 F)
May	32.8 C (91.0 F)	-2.8 C (27.0 F)	27.0 C (80.6 F)	1.4 C (34.5 F)
Jun	37.2 C (99.0 F)	3.9 C (39.0 F)	33.5 C (92.3 F)	5.0 C (41.0 F)
Jul	36.7 C (98.1 F)	3.9 C (39.0 F)	35.0 C (95.0 F)	8.6 C (47.5 F)
Aug	36.7 C (98.1 F)	5.0 C (41.0 F)	34.5 C (94.1 F)	7.3 C (45.1 F)
Sep	35.6 C (96.1 F)	-0.6 C (30.9 F)	33.0 C (91.4 F)	5.8 C (42.4 F)
Oct	26.7 C (80.1 F)	-6.1 C (21.0 F)	25.4 C (77.7 F)	-1.6 C (29.1 F)
Nov	22.2 C (72.0 F)	-16.7 C (1.9 F)	16.4 C (61.5 F)	-2.3 C (27.9 F)
Dec	16.7 C (62.1 F)	-17.8 C (0.0 F)	15.7 C (60.3 F)	-2.9 C (26.8 F)

Which Years Hold Standing Records

1,464 standing records

1,464 records at Tacoma McChord AFB still stand. 1949 holds the most, with 103.

Standing records at Tacoma McChord AFB by the year they were set
Year set	Standing records
1949	103
1950	91
1951	53
1952	60
1953	69
1954	53
1955	73
1956	68
1957	58
1958	72
1959	52
1960	67
1961	55
1962	79
1963	61
1964	61
1965	55
1966	42
1967	35
1968	62
1969	63
1970	49
2025	83

Wettest Day of Each Month

Nov: 75.2 mm (3.0 in)

The wettest day on record for each calendar month at Tacoma McChord AFB. The most was 75.2 mm (3.0 in) on 19 November 1962.

Record daily precipitation for each month at Tacoma McChord AFB
Month	Record daily precipitation (mm)	Date
Jan	52.6 mm (2.1 in)	19 January 1967
Feb	69.9 mm (2.8 in)	9 February 1951
Mar	29.0 mm (1.1 in)	23 March 1956
Apr	45.2 mm (1.8 in)	19 April 1965
May	34.5 mm (1.4 in)	29 May 1969
Jun	35.3 mm (1.4 in)	1 June 1968
Jul	30.0 mm (1.2 in)	14 July 1957
Aug	34.3 mm (1.4 in)	23 August 1968
Sep	42.4 mm (1.7 in)	17 September 1969
Oct	38.9 mm (1.5 in)	23 October 1960
Nov	75.2 mm (3.0 in)	19 November 1962
Dec	48.8 mm (1.9 in)	30 December 1970

Period of Record Coverage

1946 to 2025

25 years of record at Tacoma McChord AFB, 1946 to 2025. 2 years have data for under 90 percent of days and are left out of rankings: 1946, 1947.

Days with data per year at Tacoma McChord AFB
Year	Days with data	Share of year	Complete
1946	2	1%	No
1947	2	1%	No
1949	365	100%	Yes
1950	362	99%	Yes
1951	365	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	364	100%	Yes
1955	365	100%	Yes
1956	365	100%	Yes
1957	365	100%	Yes
1958	364	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	364	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	365	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	364	100%	Yes
2025	361	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 Tacoma McChord AFB, 1949 to 2025. Blue stripes are years cooler than the station's own mean of 10.3 C (50.6 F); red stripes are warmer. The coolest year was 1955, at 9.2 C (48.5 F), and the warmest was 2025, at 12.1 C (53.7 F). The strongest colour marks a difference of 1.8 C (3.2 F).

Annual mean temperature at Tacoma McChord AFB as warming stripes, 1949 to 2025
Year	Annual mean temperature	Difference from the station mean
1949	9.8 C	-0.51 C
1950	9.9 C	-0.41 C
1951	10.4 C	+0.11 C
1952	10.4 C	+0.04 C
1953	11.1 C	+0.76 C
1954	10.1 C	-0.23 C
1955	9.2 C	-1.15 C
1956	9.6 C	-0.73 C
1957	10.2 C	-0.09 C
1958	11.7 C	+1.39 C
1959	10.0 C	-0.32 C
1960	9.8 C	-0.52 C
1961	10.5 C	+0.13 C
1962	10.2 C	-0.14 C
1963	10.2 C	-0.17 C
1964	9.2 C	-1.09 C
1965	10.3 C	-0.07 C
1966	10.5 C	+0.15 C
1967	10.9 C	+0.56 C
1968	10.5 C	+0.21 C
1969	10.2 C	-0.17 C
1970	10.8 C	+0.44 C
2025	12.1 C	+1.73 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

1946 to 2026

Yearly extremes at Tacoma McChord AFB: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.2 C (99.0 F)	1955	33.3 C (91.9 F)	26
Coldest night (TNn)	-20.6 C (-5.1 F)	1950	-11.4 C (11.5 F)	26
Wettest day (Rx1day)	75.2 mm (3.0 in)	1962	42.4 mm (1.7 in)	25
Wettest five days (Rx5day)	151.6 mm (6.0 in)	1959	87.3 mm (3.4 in)	22
Longest dry spell (CDD)	71 days	1967	27 days	25

Hottest day (TXx)

The hottest day of the year at Tacoma McChord AFB, 1946 to 2026. The record is 37.2 C (99.0 F) in 1955, marked on the chart; the median year is 33.3 C (91.9 F).

Hottest day (TXx) at Tacoma McChord AFB by year
Year	Hottest day (TXx)
1946	4.4 C (39.9 F)
1947	22.8 C (73.0 F)
1949	33.3 C (91.9 F)
1950	32.8 C (91.0 F)
1951	35.0 C (95.0 F)
1952	33.9 C (93.0 F)
1953	33.3 C (91.9 F)
1954	28.3 C (82.9 F)
1955	37.2 C (99.0 F)
1956	35.6 C (96.1 F)
1957	30.0 C (86.0 F)
1958	36.7 C (98.1 F)
1959	36.1 C (97.0 F)
1960	36.7 C (98.1 F)
1961	35.0 C (95.0 F)
1962	32.2 C (90.0 F)
1963	32.8 C (91.0 F)
1964	29.4 C (84.9 F)
1965	32.8 C (91.0 F)
1966	31.1 C (88.0 F)
1967	34.4 C (93.9 F)
1968	33.3 C (91.9 F)
1969	32.2 C (90.0 F)
1970	35.0 C (95.0 F)
2025	35.0 C (95.0 F)
2026	34.6 C (94.3 F)

Coldest night (TNn)

The coldest night of the year at Tacoma McChord AFB, 1946 to 2026. The record is -20.6 C (-5.1 F) in 1950, marked on the chart; the median year is -11.4 C (11.5 F).

Coldest night (TNn) at Tacoma McChord AFB by year
Year	Coldest night (TNn)
1946	-3.3 C (26.1 F)
1947	7.8 C (46.0 F)
1949	-15.6 C (3.9 F)
1950	-20.6 C (-5.1 F)
1951	-12.2 C (10.0 F)
1952	-11.1 C (12.0 F)
1953	-3.3 C (26.1 F)
1954	-13.3 C (8.1 F)
1955	-16.7 C (1.9 F)
1956	-11.7 C (10.9 F)
1957	-16.7 C (1.9 F)
1958	-6.7 C (19.9 F)
1959	-15.0 C (5.0 F)
1960	-7.8 C (18.0 F)
1961	-7.2 C (19.0 F)
1962	-12.2 C (10.0 F)
1963	-14.4 C (6.1 F)
1964	-13.9 C (7.0 F)
1965	-7.2 C (19.0 F)
1966	-5.0 C (23.0 F)
1967	-8.3 C (17.1 F)
1968	-17.8 C (0.0 F)
1969	-11.7 C (10.9 F)
1970	-7.8 C (18.0 F)
2025	-9.4 C (15.1 F)
2026	-6.5 C (20.3 F)

Wettest day (Rx1day)

The wettest day of the year at Tacoma McChord AFB, 1946 to 2026. The record is 75.2 mm (3.0 in) in 1962, marked on the chart; the median year is 42.4 mm (1.7 in).

Wettest day (Rx1day) at Tacoma McChord AFB by year
Year	Wettest day (Rx1day)
1946	0.5 mm (0.02 in)
1947	0.0 mm (0.00 in)
1949	49.3 mm (1.9 in)
1950	32.5 mm (1.3 in)
1951	69.9 mm (2.8 in)
1952	18.0 mm (0.7 in)
1953	33.5 mm (1.3 in)
1954	43.9 mm (1.7 in)
1955	52.1 mm (2.1 in)
1956	43.9 mm (1.7 in)
1957	30.7 mm (1.2 in)
1958	38.1 mm (1.5 in)
1959	73.9 mm (2.9 in)
1960	50.5 mm (2.0 in)
1961	38.6 mm (1.5 in)
1962	75.2 mm (3.0 in)
1963	41.7 mm (1.6 in)
1964	42.4 mm (1.7 in)
1965	45.2 mm (1.8 in)
1966	35.3 mm (1.4 in)
1967	52.6 mm (2.1 in)
1968	35.3 mm (1.4 in)
1969	42.4 mm (1.7 in)
1970	48.8 mm (1.9 in)
2025	n/a
2026	19.9 mm (0.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Tacoma McChord AFB, 1946 to 2026. The record is 151.6 mm (6.0 in) in 1959, marked on the chart; the median year is 87.3 mm (3.4 in).

Wettest five days (Rx5day) at Tacoma McChord AFB by year
Year	Wettest five days (Rx5day)
1946	n/a
1947	n/a
1949	112.4 mm (4.4 in)
1950	73.1 mm (2.9 in)
1951	136.1 mm (5.4 in)
1952	39.9 mm (1.6 in)
1953	82.1 mm (3.2 in)
1954	102.1 mm (4.0 in)
1955	106.7 mm (4.2 in)
1956	101.1 mm (4.0 in)
1957	81.5 mm (3.2 in)
1958	93.4 mm (3.7 in)
1959	151.6 mm (6.0 in)
1960	114.5 mm (4.5 in)
1961	69.9 mm (2.8 in)
1962	83.1 mm (3.3 in)
1963	98.1 mm (3.9 in)
1964	90.5 mm (3.6 in)
1965	68.6 mm (2.7 in)
1966	84.5 mm (3.3 in)
1967	76.7 mm (3.0 in)
1968	81.8 mm (3.2 in)
1969	73.4 mm (2.9 in)
1970	90.0 mm (3.5 in)
2025	n/a
2026	n/a

Longest dry spell (CDD)

The longest dry spell of the year at Tacoma McChord AFB, 1946 to 2026. The record is 71 days in 1967, marked on the chart; the median year is 27 days.

Longest dry spell (CDD) at Tacoma McChord AFB by year
Year	Longest dry spell (CDD)
1946	1 day
1947	1 day
1949	29 days
1950	31 days
1951	52 days
1952	41 days
1953	23 days
1954	24 days
1955	43 days
1956	27 days
1957	26 days
1958	34 days
1959	21 days
1960	55 days
1961	38 days
1962	27 days
1963	19 days
1964	15 days
1965	25 days
1966	32 days
1967	71 days
1968	24 days
1969	46 days
1970	25 days
2025	n/a
2026	3 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

23 years with a frost

Across 23 years with a frost, the median last spring frost at Tacoma McChord AFB falls on 27 April and the median first autumn frost on 18 October, which leaves a median of 176 days between them.

Frost dates and growing season at Tacoma McChord AFB
Measure	Median, all years	Earliest period	Recent period (1949 to 2025)	Recent against earliest	Fitted trend
Last spring frost	27 April	n/a	27 April	n/a	n/a
First autumn frost	18 October	n/a	18 October	n/a	n/a
Growing days	176 days	n/a	176 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 Tacoma McChord AFB standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tacoma McChord 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 2026-10-14 (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).