Impfondo Weather Records (CF000004459)

Record envelope, standing records and threshold days for Impfondo (CF000004459), Congo (Brazzaville), with 31 years of record.

Key Facts for Impfondo

Impfondo (CF000004459) is a weather station in Congo (Brazzaville) at 1.62 latitude and 18.07 longitude, 326 m (1,070 ft) above sea level.
The station reports from 1950 to 1980, 31 years of record.
1,464 records set at Impfondo still stand.
Records are tracked for no element yet: an element needs 30 years of data to be eligible.

About the Station

Location: Congo (Brazzaville), 1.62 latitude, 18.07 longitude.
Elevation: 326 m (1,070 ft).
Period of record: 1950 to 1980, 31 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 Impfondo. 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 Impfondo, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	35.2 C (95.4 F)	12.9 C (55.2 F)	n/a	n/a
Feb	37.2 C (99.0 F)	14.9 C (58.8 F)	n/a	n/a
Mar	37.3 C (99.1 F)	16.7 C (62.1 F)	n/a	n/a
Apr	36.7 C (98.1 F)	17.6 C (63.7 F)	n/a	n/a
May	35.5 C (95.9 F)	17.1 C (62.8 F)	n/a	n/a
Jun	34.8 C (94.6 F)	17.9 C (64.2 F)	n/a	n/a
Jul	33.2 C (91.8 F)	15.9 C (60.6 F)	n/a	n/a
Aug	33.6 C (92.5 F)	17.2 C (63.0 F)	n/a	n/a
Sep	34.1 C (93.4 F)	17.4 C (63.3 F)	n/a	n/a
Oct	34.0 C (93.2 F)	16.4 C (61.5 F)	n/a	n/a
Nov	36.0 C (96.8 F)	17.4 C (63.3 F)	n/a	n/a
Dec	34.1 C (93.4 F)	12.4 C (54.3 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Impfondo still stand. 1952 holds the most, with 74.

Standing records at Impfondo by the year they were set
Year set	Standing records
1950	69
1951	72
1952	74
1953	51
1954	51
1955	51
1956	33
1957	48
1958	69
1959	11
1960	38
1961	47
1962	55
1963	34
1964	57
1965	43
1967	43
1968	58
1969	42
1970	35
1971	67
1972	51
1973	62
1974	36
1975	59
1976	45
1977	52
1978	27
1979	47
1980	37

Wettest Day of Each Month

Sep: 119.6 mm (4.7 in)

The wettest day on record for each calendar month at Impfondo. The most was 119.6 mm (4.7 in) on 14 September 1969.

Record daily precipitation for each month at Impfondo
Month	Record daily precipitation (mm)	Date
Jan	56.4 mm (2.2 in)	8 January 1974
Feb	75.8 mm (3.0 in)	8 February 1973
Mar	81.4 mm (3.2 in)	30 March 1960
Apr	112.1 mm (4.4 in)	21 April 1958
May	79.2 mm (3.1 in)	16 May 1965
Jun	111.5 mm (4.4 in)	15 June 1980
Jul	75.8 mm (3.0 in)	16 July 1953
Aug	101.4 mm (4.0 in)	8 August 1950
Sep	119.6 mm (4.7 in)	14 September 1969
Oct	86.5 mm (3.4 in)	6 October 1961
Nov	104.4 mm (4.1 in)	17 November 1973
Dec	68.0 mm (2.7 in)	15 December 1958

Period of Record Coverage

1950 to 1980

30 years of record at Impfondo, 1950 to 1980. 2 years have data for under 90 percent of days and are left out of rankings: 1959, 1965.

Days with data per year at Impfondo
Year	Days with data	Share of year	Complete
1950	365	100%	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	90	25%	No
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	273	75%	No
1967	365	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	335	92%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	364	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	366	100%	Yes

Latest Records

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

Climate Trend

27 complete years, 1950 to 1980

One stripe for each of 27 complete years at Impfondo, 1950 to 1980. Blue stripes are years cooler than the station's own mean of 25.4 C (77.8 F); red stripes are warmer. The coolest year was 1971, at 25.0 C (77.1 F), and the warmest was 1951, at 25.9 C (78.6 F). The strongest colour marks a difference of 0.5 C (0.9 F).

Annual mean temperature at Impfondo as warming stripes, 1950 to 1980
Year	Annual mean temperature	Difference from the station mean
1950	25.6 C	+0.19 C
1951	25.9 C	+0.49 C
1952	25.9 C	+0.47 C
1953	25.7 C	+0.31 C
1954	25.2 C	-0.24 C
1955	25.2 C	-0.21 C
1956	25.1 C	-0.34 C
1957	25.4 C	-0.02 C
1958	25.8 C	+0.34 C
1960	25.3 C	-0.15 C
1961	25.2 C	-0.27 C
1962	25.3 C	-0.11 C
1963	25.4 C	-0.07 C
1964	25.1 C	-0.34 C
1967	25.4 C	-0.06 C
1968	25.1 C	-0.36 C
1969	25.4 C	-0.01 C
1970	25.6 C	+0.14 C
1971	25.0 C	-0.38 C
1972	25.6 C	+0.21 C
1973	25.9 C	+0.48 C
1975	25.1 C	-0.33 C
1976	25.3 C	-0.11 C
1977	25.5 C	+0.12 C
1978	25.4 C	-0.03 C
1979	25.7 C	+0.28 C
1980	25.5 C	+0.06 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

1950 to 1980

Yearly extremes at Impfondo: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	37.3 C (99.1 F)	1973	36.1 C (97.0 F)	30
Coldest night (TNn)	12.4 C (54.3 F)	1971	15.0 C (59.0 F)	30
Wettest day (Rx1day)	119.6 mm (4.7 in)	1969	83.0 mm (3.3 in)	30
Wettest five days (Rx5day)	265.0 mm (10.4 in)	1975	128.7 mm (5.1 in)	30
Longest dry spell (CDD)	42 days	1967	17 days	30

Hottest day (TXx)

The hottest day of the year at Impfondo, 1950 to 1980. The record is 37.3 C (99.1 F) in 1973, marked on the chart; the median year is 36.1 C (97.0 F).

Hottest day (TXx) at Impfondo by year
Year	Hottest day (TXx)
1950	36.8 C (98.2 F)
1951	36.6 C (97.9 F)
1952	36.7 C (98.1 F)
1953	35.9 C (96.6 F)
1954	34.8 C (94.6 F)
1955	35.8 C (96.4 F)
1956	35.4 C (95.7 F)
1957	35.0 C (95.0 F)
1958	36.0 C (96.8 F)
1959	36.1 C (97.0 F)
1960	34.7 C (94.5 F)
1961	34.1 C (93.4 F)
1962	36.3 C (97.3 F)
1963	35.2 C (95.4 F)
1964	37.2 C (99.0 F)
1965	35.0 C (95.0 F)
1967	36.9 C (98.4 F)
1968	36.1 C (97.0 F)
1969	35.2 C (95.4 F)
1970	36.0 C (96.8 F)
1971	36.5 C (97.7 F)
1972	37.2 C (99.0 F)
1973	37.3 C (99.1 F)
1974	36.9 C (98.4 F)
1975	37.0 C (98.6 F)
1976	35.8 C (96.4 F)
1977	35.5 C (95.9 F)
1978	36.5 C (97.7 F)
1979	36.4 C (97.5 F)
1980	36.5 C (97.7 F)

Coldest night (TNn)

The coldest night of the year at Impfondo, 1950 to 1980. The record is 12.4 C (54.3 F) in 1971, marked on the chart; the median year is 15.0 C (59.0 F).

Coldest night (TNn) at Impfondo by year
Year	Coldest night (TNn)
1950	15.0 C (59.0 F)
1951	17.5 C (63.5 F)
1952	16.4 C (61.5 F)
1953	15.0 C (59.0 F)
1954	14.9 C (58.8 F)
1955	15.4 C (59.7 F)
1956	14.7 C (58.5 F)
1957	14.6 C (58.3 F)
1958	16.8 C (62.2 F)
1959	19.0 C (66.2 F)
1960	16.0 C (60.8 F)
1961	15.7 C (60.3 F)
1962	14.0 C (57.2 F)
1963	17.5 C (63.5 F)
1964	14.8 C (58.6 F)
1965	16.0 C (60.8 F)
1967	15.0 C (59.0 F)
1968	14.3 C (57.7 F)
1969	15.0 C (59.0 F)
1970	15.9 C (60.6 F)
1971	12.4 C (54.3 F)
1972	17.6 C (63.7 F)
1973	17.1 C (62.8 F)
1974	16.0 C (60.8 F)
1975	15.0 C (59.0 F)
1976	14.0 C (57.2 F)
1977	14.2 C (57.6 F)
1978	12.9 C (55.2 F)
1979	17.0 C (62.6 F)
1980	13.9 C (57.0 F)

Wettest day (Rx1day)

The wettest day of the year at Impfondo, 1950 to 1980. The record is 119.6 mm (4.7 in) in 1969, marked on the chart; the median year is 83.0 mm (3.3 in).

Wettest day (Rx1day) at Impfondo by year
Year	Wettest day (Rx1day)
1950	101.4 mm (4.0 in)
1951	100.0 mm (3.9 in)
1952	78.5 mm (3.1 in)
1953	75.8 mm (3.0 in)
1954	71.0 mm (2.8 in)
1955	73.7 mm (2.9 in)
1956	84.5 mm (3.3 in)
1957	58.0 mm (2.3 in)
1958	112.1 mm (4.4 in)
1959	53.4 mm (2.1 in)
1960	81.4 mm (3.2 in)
1961	86.5 mm (3.4 in)
1962	57.8 mm (2.3 in)
1963	86.1 mm (3.4 in)
1964	64.0 mm (2.5 in)
1965	79.2 mm (3.1 in)
1967	90.9 mm (3.6 in)
1968	74.4 mm (2.9 in)
1969	119.6 mm (4.7 in)
1970	94.5 mm (3.7 in)
1971	86.2 mm (3.4 in)
1972	60.0 mm (2.4 in)
1973	104.4 mm (4.1 in)
1974	66.0 mm (2.6 in)
1975	96.5 mm (3.8 in)
1976	72.6 mm (2.9 in)
1977	50.1 mm (2.0 in)
1978	87.4 mm (3.4 in)
1979	99.0 mm (3.9 in)
1980	111.5 mm (4.4 in)

Wettest five days (Rx5day)

The wettest five days of the year at Impfondo, 1950 to 1980. The record is 265.0 mm (10.4 in) in 1975, marked on the chart; the median year is 128.7 mm (5.1 in).

Wettest five days (Rx5day) at Impfondo by year
Year	Wettest five days (Rx5day)
1950	134.0 mm (5.3 in)
1951	145.5 mm (5.7 in)
1952	116.0 mm (4.6 in)
1953	118.9 mm (4.7 in)
1954	97.2 mm (3.8 in)
1955	110.6 mm (4.4 in)
1956	107.9 mm (4.2 in)
1957	142.4 mm (5.6 in)
1958	161.1 mm (6.3 in)
1959	59.5 mm (2.3 in)
1960	110.3 mm (4.3 in)
1961	139.1 mm (5.5 in)
1962	105.5 mm (4.2 in)
1963	140.3 mm (5.5 in)
1964	113.5 mm (4.5 in)
1965	127.3 mm (5.0 in)
1967	122.0 mm (4.8 in)
1968	138.6 mm (5.5 in)
1969	161.6 mm (6.4 in)
1970	130.1 mm (5.1 in)
1971	141.4 mm (5.6 in)
1972	102.7 mm (4.0 in)
1973	141.0 mm (5.6 in)
1974	107.0 mm (4.2 in)
1975	265.0 mm (10.4 in)
1976	118.8 mm (4.7 in)
1977	124.1 mm (4.9 in)
1978	161.1 mm (6.3 in)
1979	151.6 mm (6.0 in)
1980	165.3 mm (6.5 in)

Longest dry spell (CDD)

The longest dry spell of the year at Impfondo, 1950 to 1980. The record is 42 days in 1967, marked on the chart; the median year is 17 days.

Longest dry spell (CDD) at Impfondo by year
Year	Longest dry spell (CDD)
1950	23 days
1951	20 days
1952	11 days
1953	23 days
1954	16 days
1955	12 days
1956	17 days
1957	14 days
1958	22 days
1959	11 days
1960	8 days
1961	14 days
1962	23 days
1963	10 days
1964	26 days
1965	18 days
1967	42 days
1968	19 days
1969	15 days
1970	13 days
1971	23 days
1972	15 days
1973	17 days
1974	16 days
1975	21 days
1976	28 days
1977	19 days
1978	16 days
1979	14 days
1980	11 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 Impfondo standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Impfondo 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).