Assab Weather Records (ER000063043)

Record envelope, standing records and threshold days for Assab (ER000063043), Eritrea, with 41 years of record.

Key Facts for Assab

Assab (ER000063043) is a weather station in Eritrea at 13.07 latitude and 42.72 longitude, 14 m (46 ft) above sea level.
The station reports from 1947 to 1987, 41 years of record.
1,464 records set at Assab still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Assab set a daily record high minimum temperature of 24.7 C (76.5 F) on 29 December 1987.

About the Station

Location: Eritrea, 13.07 latitude, 42.72 longitude.
Elevation: 14 m (46 ft).
Period of record: 1947 to 1987, 41 years.
Eligible elements: tmax, tmin, prcp.

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 Assab. 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 Assab, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	37.0 C (98.6 F)	8.9 C (48.0 F)	n/a	n/a
Feb	37.0 C (98.6 F)	8.9 C (48.0 F)	n/a	n/a
Mar	40.0 C (104.0 F)	10.0 C (50.0 F)	n/a	n/a
Apr	43.0 C (109.4 F)	9.0 C (48.2 F)	n/a	n/a
May	43.2 C (109.8 F)	14.4 C (57.9 F)	n/a	n/a
Jun	44.2 C (111.6 F)	17.5 C (63.5 F)	n/a	n/a
Jul	45.0 C (113.0 F)	19.6 C (67.3 F)	n/a	n/a
Aug	44.4 C (111.9 F)	19.9 C (67.8 F)	n/a	n/a
Sep	45.0 C (113.0 F)	16.0 C (60.8 F)	n/a	n/a
Oct	41.0 C (105.8 F)	15.0 C (59.0 F)	n/a	n/a
Nov	39.0 C (102.2 F)	11.0 C (51.8 F)	n/a	n/a
Dec	36.5 C (97.7 F)	10.0 C (50.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Assab still stand. 1959 holds the most, with 94.

Standing records at Assab by the year they were set
Year set	Standing records
1947	78
1948	26
1949	50
1950	51
1951	38
1952	31
1953	30
1954	66
1955	35
1956	27
1957	46
1958	38
1959	94
1960	70
1961	34
1962	50
1963	21
1964	72
1965	36
1966	14
1967	17
1968	48
1969	52
1970	37
1971	24
1972	17
1973	12
1974	28
1975	40
1976	25
1977	54
1978	29
1979	19
1980	44
1982	27
1983	25
1984	27
1985	8
1986	12
1987	12

All-Time Record Progression

1 new records

1 all-time records were set at Assab between 28 August 1986 and 28 August 1986. Each dot is a new record.

Wettest Day of Each Month

Aug: 99.0 mm (3.9 in)

The wettest day on record for each calendar month at Assab. The most was 99.0 mm (3.9 in) on 28 August 1986.

Record daily precipitation for each month at Assab
Month	Record daily precipitation (mm)	Date
Jan	39.6 mm (1.6 in)	22 January 1959
Feb	30.2 mm (1.2 in)	12 February 1968
Mar	30.0 mm (1.2 in)	19 March 1974
Apr	39.0 mm (1.5 in)	2 April 1975
May	34.7 mm (1.4 in)	5 May 1985
Jun	2.9 mm (0.11 in)	2 June 1967
Jul	50.9 mm (2.0 in)	19 July 1954
Aug	99.0 mm (3.9 in)	28 August 1986
Sep	23.0 mm (0.9 in)	24 September 1960
Oct	12.6 mm (0.5 in)	4 October 1982
Nov	64.0 mm (2.5 in)	18 November 1967
Dec	74.5 mm (2.9 in)	19 December 1953

Period of Record Coverage

1947 to 1987

40 years of record at Assab, 1947 to 1987. 10 years have data for under 90 percent of days and are left out of rankings: 1948, 1959, 1960, 1976, 1977, 1978, 1982, 1985 and others.

Days with data per year at Assab
Year	Days with data	Share of year	Complete
1947	332	91%	Yes
1948	322	88%	No
1949	363	99%	Yes
1950	365	100%	Yes
1951	365	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	358	98%	Yes
1955	365	100%	Yes
1956	366	100%	Yes
1957	344	94%	Yes
1958	365	100%	Yes
1959	303	83%	No
1960	297	81%	No
1961	365	100%	Yes
1962	358	98%	Yes
1963	365	100%	Yes
1964	363	99%	Yes
1965	365	100%	Yes
1966	362	99%	Yes
1967	334	92%	Yes
1968	335	92%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	364	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	319	87%	No
1977	328	90%	No
1978	322	88%	No
1979	365	100%	Yes
1980	365	100%	Yes
1982	320	88%	No
1983	360	99%	Yes
1984	335	92%	Yes
1985	303	83%	No
1986	205	56%	No
1987	238	65%	No

Latest Records

Latest records at Assab
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 December 1987	Assab, ER	daily high min	24.7 C (76.5 F)	0.7 C (1.3 F)	8 years	8 of 100 (Routine)
28 December 1987	Assab, ER	daily high min (Tie)	24.0 C (75.2 F)	tie	32 years	3 of 100 (Routine)
22 October 1987	Assab, ER	daily low max (Tie)	31.9 C (89.4 F)	tie	34 years	3 of 100 (Routine)
1 October 1987	Assab, ER	daily low max	33.5 C (92.3 F)	0.3 C (0.5 F)	0 years	5 of 100 (Routine)
27 September 1987	Assab, ER	daily high max	39.0 C (102.2 F)	0.1 C (0.2 F)	8 years	6 of 100 (Routine)
30 August 1987	Assab, ER	daily high min	32.6 C (90.7 F)	0.5 C (0.9 F)	9 years	8 of 100 (Routine)
2 August 1987	Assab, ER	daily high min	32.4 C (90.3 F)	0.4 C (0.7 F)	34 years	15 of 100 (Routine)
12 July 1987	Assab, ER	daily low max	36.0 C (96.8 F)	0.4 C (0.7 F)	4 years	6 of 100 (Routine)
17 June 1987	Assab, ER	daily high min (Tie)	32.0 C (89.6 F)	tie	32 years	3 of 100 (Routine)
17 June 1987	Assab, ER	daily high max (Tie)	41.8 C (107.2 F)	tie	6 years	1 of 100 (Routine)
16 June 1987	Assab, ER	daily high min (Tie)	32.0 C (89.6 F)	tie	24 years	2 of 100 (Routine)
15 June 1987	Assab, ER	daily rain	1.0 mm (0.04 in)	1.0 mm (0.04 in)	40 years	17 of 100 (Routine)
3 June 1987	Assab, ER	daily high min	32.0 C (89.6 F)	1.0 C (1.8 F)	24 years	15 of 100 (Routine)
24 May 1987	Assab, ER	daily low max	32.5 C (90.5 F)	0.5 C (0.9 F)	30 years	15 of 100 (Routine)
21 May 1987	Assab, ER	daily low max	30.6 C (87.1 F)	2.4 C (4.3 F)	32 years	22 of 100 (Routine)
20 May 1987	Assab, ER	daily low max	32.9 C (91.2 F)	1.0 C (1.8 F)	36 years	19 of 100 (Routine)
19 May 1987	Assab, ER	daily low max	32.9 C (91.2 F)	0.1 C (0.2 F)	22 years	10 of 100 (Routine)
14 April 1987	Assab, ER	daily high min (Tie)	28.0 C (82.4 F)	tie	32 years	3 of 100 (Routine)
9 April 1987	Assab, ER	daily rain	0.9 mm (0.04 in)	0.9 mm (0.04 in)	40 years	16 of 100 (Routine)
6 April 1987	Assab, ER	daily rain	8.7 mm (0.34 in)	8.7 mm (0.34 in)	40 years	20 of 100 (Routine)

Climate Trend

25 complete years, 1949 to 1984

One stripe for each of 25 complete years at Assab, 1949 to 1984. Blue stripes are years cooler than the station's own mean of 30.2 C (86.3 F); red stripes are warmer. The coolest year was 1955, at 28.2 C (82.8 F), and the warmest was 1980, at 31.6 C (88.8 F). The strongest colour marks a difference of 2.0 C (3.6 F).

Annual mean temperature at Assab as warming stripes, 1949 to 1984
Year	Annual mean temperature	Difference from the station mean
1949	29.8 C	-0.40 C
1950	29.1 C	-1.08 C
1951	29.5 C	-0.66 C
1952	29.9 C	-0.31 C
1953	29.8 C	-0.35 C
1954	30.0 C	-0.21 C
1955	28.2 C	-1.97 C
1957	29.4 C	-0.75 C
1961	31.1 C	+0.90 C
1962	31.2 C	+1.04 C
1963	31.3 C	+1.09 C
1964	29.8 C	-0.37 C
1965	29.7 C	-0.51 C
1966	30.5 C	+0.28 C
1969	31.6 C	+1.39 C
1970	30.4 C	+0.25 C
1971	30.0 C	-0.16 C
1972	30.3 C	+0.12 C
1973	30.1 C	-0.06 C
1974	29.2 C	-0.97 C
1975	29.4 C	-0.83 C
1979	30.9 C	+0.70 C
1980	31.6 C	+1.39 C
1983	31.0 C	+0.76 C
1984	31.0 C	+0.81 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

1947 to 1987

Yearly extremes at Assab: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	45.0 C (113.0 F)	1960	43.0 C (109.4 F)	40
Coldest night (TNn)	8.9 C (48.0 F)	1959	17.0 C (62.6 F)	40
Wettest day (Rx1day)	99.0 mm (3.9 in)	1986	18.2 mm (0.7 in)	40
Wettest five days (Rx5day)	198.0 mm (7.8 in)	1986	21.0 mm (0.8 in)	40
Longest dry spell (CDD)	366 days	1984	218 days	40

Hottest day (TXx)

The hottest day of the year at Assab, 1947 to 1987. The record is 45.0 C (113.0 F) in 1960, marked on the chart; the median year is 43.0 C (109.4 F).

Hottest day (TXx) at Assab by year
Year	Hottest day (TXx)
1947	43.0 C (109.4 F)
1948	42.8 C (109.0 F)
1949	41.7 C (107.1 F)
1950	40.6 C (105.1 F)
1951	42.8 C (109.0 F)
1952	42.8 C (109.0 F)
1953	41.7 C (107.1 F)
1954	42.2 C (108.0 F)
1955	42.0 C (107.6 F)
1956	42.0 C (107.6 F)
1957	43.0 C (109.4 F)
1958	44.0 C (111.2 F)
1959	43.9 C (111.0 F)
1960	45.0 C (113.0 F)
1961	43.0 C (109.4 F)
1962	45.0 C (113.0 F)
1963	43.0 C (109.4 F)
1964	42.5 C (108.5 F)
1965	44.0 C (111.2 F)
1966	44.0 C (111.2 F)
1967	43.2 C (109.8 F)
1968	43.0 C (109.4 F)
1969	43.1 C (109.6 F)
1970	44.0 C (111.2 F)
1971	43.0 C (109.4 F)
1972	43.2 C (109.8 F)
1973	43.7 C (110.7 F)
1974	43.0 C (109.4 F)
1975	43.0 C (109.4 F)
1976	43.3 C (109.9 F)
1977	44.0 C (111.2 F)
1978	44.4 C (111.9 F)
1979	43.4 C (110.1 F)
1980	43.6 C (110.5 F)
1982	43.8 C (110.8 F)
1983	43.2 C (109.8 F)
1984	43.2 C (109.8 F)
1985	42.7 C (108.9 F)
1986	42.7 C (108.9 F)
1987	41.8 C (107.2 F)

Coldest night (TNn)

The coldest night of the year at Assab, 1947 to 1987. The record is 8.9 C (48.0 F) in 1959, marked on the chart; the median year is 17.0 C (62.6 F).

Coldest night (TNn) at Assab by year
Year	Coldest night (TNn)
1947	20.0 C (68.0 F)
1948	14.4 C (57.9 F)
1949	19.0 C (66.2 F)
1950	19.4 C (66.9 F)
1951	17.8 C (64.0 F)
1952	20.6 C (69.1 F)
1953	20.0 C (68.0 F)
1954	20.0 C (68.0 F)
1955	16.0 C (60.8 F)
1956	18.0 C (64.4 F)
1957	10.0 C (50.0 F)
1958	9.0 C (48.2 F)
1959	8.9 C (48.0 F)
1960	12.0 C (53.6 F)
1961	21.0 C (69.8 F)
1962	17.0 C (62.6 F)
1963	20.0 C (68.0 F)
1964	12.0 C (53.6 F)
1965	11.0 C (51.8 F)
1966	19.0 C (66.2 F)
1967	16.6 C (61.9 F)
1968	17.0 C (62.6 F)
1969	15.0 C (59.0 F)
1970	17.2 C (63.0 F)
1971	17.0 C (62.6 F)
1972	17.0 C (62.6 F)
1973	13.0 C (55.4 F)
1974	14.0 C (57.2 F)
1975	12.3 C (54.1 F)
1976	11.6 C (52.9 F)
1977	12.2 C (54.0 F)
1978	12.3 C (54.1 F)
1979	16.0 C (60.8 F)
1980	18.5 C (65.3 F)
1982	20.8 C (69.4 F)
1983	14.6 C (58.3 F)
1984	20.0 C (68.0 F)
1985	20.5 C (68.9 F)
1986	21.0 C (69.8 F)
1987	20.5 C (68.9 F)

Wettest day (Rx1day)

The wettest day of the year at Assab, 1947 to 1987. The record is 99.0 mm (3.9 in) in 1986, marked on the chart; the median year is 18.2 mm (0.7 in).

Wettest day (Rx1day) at Assab by year
Year	Wettest day (Rx1day)
1947	0.0 mm (0.00 in)
1948	0.5 mm (0.02 in)
1949	23.6 mm (0.9 in)
1950	21.2 mm (0.8 in)
1951	56.0 mm (2.2 in)
1952	4.0 mm (0.16 in)
1953	74.5 mm (2.9 in)
1954	50.9 mm (2.0 in)
1955	5.1 mm (0.20 in)
1956	29.5 mm (1.2 in)
1957	10.0 mm (0.4 in)
1958	0.8 mm (0.03 in)
1959	39.6 mm (1.6 in)
1960	23.0 mm (0.9 in)
1961	43.7 mm (1.7 in)
1962	3.0 mm (0.12 in)
1963	9.4 mm (0.37 in)
1964	37.3 mm (1.5 in)
1965	0.1 mm (0.00 in)
1966	10.4 mm (0.4 in)
1967	64.0 mm (2.5 in)
1968	30.2 mm (1.2 in)
1969	1.3 mm (0.05 in)
1970	12.0 mm (0.5 in)
1971	23.0 mm (0.9 in)
1972	1.0 mm (0.04 in)
1973	27.5 mm (1.1 in)
1974	30.0 mm (1.2 in)
1975	39.0 mm (1.5 in)
1976	3.8 mm (0.15 in)
1977	3.6 mm (0.14 in)
1978	19.0 mm (0.7 in)
1979	0.0 mm (0.00 in)
1980	4.0 mm (0.16 in)
1982	35.2 mm (1.4 in)
1983	17.4 mm (0.7 in)
1984	0.0 mm (0.00 in)
1985	34.7 mm (1.4 in)
1986	99.0 mm (3.9 in)
1987	8.7 mm (0.34 in)

Wettest five days (Rx5day)

The wettest five days of the year at Assab, 1947 to 1987. The record is 198.0 mm (7.8 in) in 1986, marked on the chart; the median year is 21.0 mm (0.8 in).

Wettest five days (Rx5day) at Assab by year
Year	Wettest five days (Rx5day)
1947	0.0 mm (0.00 in)
1948	0.5 mm (0.02 in)
1949	30.5 mm (1.2 in)
1950	25.0 mm (1.0 in)
1951	56.0 mm (2.2 in)
1952	4.0 mm (0.16 in)
1953	84.8 mm (3.3 in)
1954	50.9 mm (2.0 in)
1955	5.1 mm (0.20 in)
1956	57.6 mm (2.3 in)
1957	16.0 mm (0.6 in)
1958	1.1 mm (0.04 in)
1959	41.6 mm (1.6 in)
1960	23.0 mm (0.9 in)
1961	82.8 mm (3.3 in)
1962	36.6 mm (1.4 in)
1963	9.4 mm (0.37 in)
1964	37.3 mm (1.5 in)
1965	0.1 mm (0.00 in)
1966	10.4 mm (0.4 in)
1967	85.7 mm (3.4 in)
1968	30.3 mm (1.2 in)
1969	1.3 mm (0.05 in)
1970	13.0 mm (0.5 in)
1971	23.0 mm (0.9 in)
1972	1.0 mm (0.04 in)
1973	28.7 mm (1.1 in)
1974	30.0 mm (1.2 in)
1975	39.4 mm (1.6 in)
1976	3.8 mm (0.15 in)
1977	5.4 mm (0.21 in)
1978	19.0 mm (0.7 in)
1979	0.0 mm (0.00 in)
1980	4.0 mm (0.16 in)
1982	54.4 mm (2.1 in)
1983	17.4 mm (0.7 in)
1984	0.0 mm (0.00 in)
1985	35.6 mm (1.4 in)
1986	198.0 mm (7.8 in)
1987	9.6 mm (0.38 in)

Longest dry spell (CDD)

The longest dry spell of the year at Assab, 1947 to 1987. The record is 366 days in 1984, marked on the chart; the median year is 218 days.

Longest dry spell (CDD) at Assab by year
Year	Longest dry spell (CDD)
1947	364 days
1948	306 days
1949	265 days
1950	121 days
1951	150 days
1952	158 days
1953	107 days
1954	112 days
1955	197 days
1956	210 days
1957	268 days
1958	365 days
1959	152 days
1960	124 days
1961	88 days
1962	155 days
1963	143 days
1964	161 days
1965	365 days
1966	326 days
1967	121 days
1968	292 days
1969	340 days
1970	228 days
1971	216 days
1972	300 days
1973	346 days
1974	219 days
1975	273 days
1976	317 days
1977	323 days
1978	143 days
1979	365 days
1980	340 days
1982	185 days
1983	305 days
1984	366 days
1985	124 days
1986	97 days
1987	199 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.

Rainfall Return Levels

38 years, 1947 to 1987

A day with at least 15.2 mm (0.6 in) of rain is expected about once in 2 years. A day with at least 97.5 mm (3.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Assab: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	15.2 mm (0.6 in)
5 years	32.7 mm (1.3 in)
10 years	46.0 mm (1.8 in)
25 years	64.8 mm (2.6 in)
50 years	80.4 mm (3.2 in)	Longer than the 38 years of record
100 years	97.5 mm (3.8 in)	Longer than the 38 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 38 years of values from 1947 to 1987.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 74.5 mm (2.9 in) in 1953; 64.0 mm (2.5 in) in 1967; 56.0 mm (2.2 in) in 1951.

Download the Data

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